Arctic Field Projects
Project Title: Collaborative Research: IPY: POLENET/Greenland: Using Bedrock Geodesy to Constrain Past and Present Day Changes in Greenland’s Ice Mass (Award# 0632320)
PI: Bevis, Michael G (mbevis@osu.edu)
Phone: (614) 499.5966
Institute/Department: Ohio State University, Byrd Polar Research Center, Department of Geological Sciences
IPY Project? YES
Funding Agency: US\Federal\NSF\OD\OPP\ARC\ANS
Program Manager: Dr. William Wiseman (wwiseman@nsf.gov)
Discipline(s): | Cryosphere\Solid Earth |
Science Summary:
This project is in collaboration with Csatho, SUNY, Buffalo (0632310). Intellectual Focus. The PIs propose to construct a network (GNET) of 38 continuous GPS stations in Greenland as part the U.S. contribution to the International Polar Year (IPY) and the international Polar Earth Observing Network (POLENET) consortium. The PIs will use this network to map the steady vertical velocity field associated with postglacial rebound (PGR), which will provide the Gravity Recovery and Climate Experiment (GRACE), and any successor missions, with an accurate ‘PGR correction’, thereby suppressing by far the largest source of uncertainty in GRACE-based estimates of ice mass changes in Greenland. The PIs also intend to use GNET to ‘weigh’ annual and inter-annual changes in ice mass, obtaining better spatial resolution than GRACE is capable of, using Earth’s instantaneous elastic response to surface load changes. This approach will be calibrated and validated by relating annual or seasonal patterns of loading (the cause) with in-phase seasonal oscillations of adjacent bedrock (the effect). Having calibrated our ‘weighing machine’ in this way, the investigators will be able to very quickly detect and analyze any abrupt increases in long term rates of ice gain or loss. Relevance to IPY: POLENET is a consortium involving 24 nations that aims to dramatically improve the coverage in geodetic, magnetic, and seismic data across the polar regions during IPY. GNET, which involves 3 international partners, constitutes the largest component of a POLENET deployment across Greenland, and is the only POLENET component in the northern hemisphere that is focused on a major ice sheet. It will complement GPS initiatives elsewhere in the Arctic to be carried out by more than 12 nations participating in POLENET. POLENET will overcome the scarcity of observational systems in the Earth’s polar regions, and will provide a legacy in observational infrastructure and in the technological capability to deploy autonomous operations in extreme environments. The GPS data and metadata will be made available to the global science community as soon as they reach the UNAVCO archive. Broader Impacts: The POLENET project will bring about the development of new technologies for operating autonomous stations in the Arctic and Antarctic. It will promote one of the most holistic collaborations between glaciologists, geodesists, geophysicists, geologists, meteorologists and oceanographers in the history of these disciplines. This project will leverage NASA’s GRACE project to a entirely new level of importance, since providing GRACE with a “PGR correction” will transform it into the single most powerful measurement system ever developed for the direct observation of mass transfer between the ice sheets and the oceans. GNET itself will be able to detect any rapid accelerations in ice mass gain or loss in Greenland, especially at the critical margins of the ice sheet, in response to changing climatic conditions. Even more broadly, understanding and monitoring the behavior of the Greenland (as well as the Antarctic) ice sheet, is a matter of tremendous societal importance. It is widely understood that there is serious danger that the W. Antarctic or Greenland ice sheets could collapse and so seriously damage the global economy, and degrade the social infrastructure supporting hundreds of millions of people, by inundating large swaths of densely inhabited coastal areas worldwide. While it may be too late to reverse global warming before sea level rise becomes seriously problematic, it is crucial to assess both the possible severity of sea level rise, and the amount of time that our governments have to respond to, or mitigate, developments that they may be powerless to prevent. Given the importance of this agenda, the researchers propose to develop an outreach component using UNAVCO’s outreach specialists.
Logistics Summary:
This project is a collaboration between Bevis, OSU (0632320, LEAD) and Csatho, SUNY-Buffalo (0632310). The PIs will construct a network (GNET) of over 38 continuous GPS stations ringing the perimeter of Greenland as part of the U.S. contribution to the International Polar Year (IPY) and the international POLENET consortium. The researchers will install the stations during 2007, 2008 and 2009. Basing from different hubs around the island, small field teams will travel to installation sites to set up the stations. The researchers will install roughly two-thirds of the sites in 2007, with several teams working simultaneously. A team of four (one Danish and three Americans) will return for about 4 weeks in late June 2008 to install 11-12 stations at the northern-most sites. After assembling in Kangerlussuaq, the team will fly via C-130 to Thule, spend two nights arranging cargo stored there, and then fly on to Station Nord via the Royal Danish Air Force. There they will base, visiting installation sites via a Super Puma AS332C helicopter. The helicopter will refuel when needed at two fuel caches set out by POLOG via Twin Otter prior to the field season. At the end of the season, the team will depart the field site via the Royal Danish Air Force and travel via Iceland for flights homeward. For 2009, the remaining stations will be installed, with the team basing out of four different hubs on the east coast of Greenland: Constable Pynt, Mestersvig, Daneborg, and Danmarkshavn. The field work will begin in early August after the Greenland Command resupply vessel has delivered GNET cargo. On 5 August, the field team of three will meet in Akureyri, Iceland. From there, they will fly to Constable Pynt, Greenland, aboard a Nordlandair chartered Twin Otter, and then to Mestersvig to pick up equipment for their Soedalen installation site. The Norwegian Super Puma will position at Mestersvig then as well. Installations will begin on 6 August, with the team flying south to Soedalen first, and then working northward from there. In all, they will install 11 new stations and visit three others for maintenance, basing at different hubs along the way. The researchers expect to be done ~29 August. Then, they will fly back to Akureyri. Two team members will accompany the Super Puma aircraft while the third will remain in Greenland to work on another project. In addition to the main field effort described above, a team will conduct maintenance on two ‘down’ sites in NW Greenland. One GNET team member will join NSI/DTU team members chartering a helicopter from Thule to do absolute gravity measurements at the ASKY (Melville Bay N of Upernavik) and KAGZ (Inglefield Land just S of Humboldt Gletscher) sites. This work will take approximately 1 week. US participation will include paying for travel/accommodation for the electronics engineer to Thule, as well as preparing a repair kit for these stations. NSI/DTU will cover all other expenses. For the 2010 season, the field effort will be led by the Danish Technical Institute (DTU), which plans to field teams around the island in several phases for GNET maintenance and absolute gravity measurements. At the end of May, a team will work on the central west coast of Greenland between Ilulissat and Upernavik. For about a week, a team of two from DTU will charter an Air Greenland helicopter from Ilulissat and do absolute gravity measurements along the coast at six GNET sites where maintenance will be done. US participation will include cargo shipment from NY via the 109th Air Guard as well as Air GL air freight shipments to Ilulissat, Upernavik and Narsarsuaq. DTU personnel will return to Greenland in mid August, 2010 and will charter an AirGL helicopter based out of Narsarsuaq, two Danish collaborators will fly up the SE coast of Greenland doing absolute gravity measurments at each of the GNET sites that have been installed in that area. Maintenance can be performed on the sites while gravity measurements are taken. The third GNET phase for 2010 led by DTU will take place in September based at Thule. A helicopter will be chartered by DTU to visit three GNET sites where again absolute gravity measurements will be performed. One US team member from UNAVCO will join the team during this phase. Some of the sites will become permanent installations, while others will be removed at the end of the project.
In 2009, UNAVCO will provide GPS receivers and technical support as the field team installs the instruments throughout Greenland, as well as ongoing support to permanent sites and data storage. CPS will provide flight coordination including cargo shipment to project hubs in Greenland, Twin Otter and helicopter air charters; fuel; lodging arrangements within Greenland; and camping equipment, some food, and communications / safety gear. Some of these items will be arranged/paid up front by NSI; CPS will reimburse NSI at cost. In 2010, US participation in 2010 will include paying for cargo shipments, travel/accommodation for the UNAVCO electronics engineer at Thule, communications/safety gear, as well as UNAVCO providing repair kits for the GNET stations. NSI/DTU will cover all other expenses.
| Season | Field Site | Date In | Date Out | #People |
| 2007 | Greenland - Astrup Kystland | 08 / 16 / 2007 | 08 / 16 / 2007 | 3 |
| 2007 | Greenland - Docker Smith Glacier | 08 / 18 / 2007 | 08 / 20 / 2007 | 3 |
| 2007 | Greenland - Helheim Glacier | 08 / 22 / 2007 | 08 / 22 / 2007 | 3 |
| 2007 | Greenland - Hjornefjeldet | 08 / 10 / 2007 | 08 / 10 / 2007 | 3 |
| 2007 | Greenland - Ilulissat | 08 / 01 / 2007 | 08 / 08 / 2007 | 3 |
| 2007 | Greenland - Isortoq | 08 / 23 / 2007 | 08 / 23 / 2007 | 3 |
| 2007 | Greenland - Joe Oer | 08 / 27 / 2007 | 08 / 27 / 2007 | 3 |
| 2007 | Greenland - KAGA Jakobshavn | 08 / 02 / 2007 | 08 / 03 / 2007 | 2 |
| 2007 | Greenland - Kangerlussuaq | 07 / 31 / 2007 | 09 / 07 / 2007 | 7 |
| 2007 | Greenland - Kap Agassiz | 08 / 23 / 2007 | 08 / 23 / 2007 | 3 |
| 2007 | Greenland - Kap Schoubye | 08 / 21 / 2007 | 08 / 21 / 2007 | 3 |
| 2007 | Greenland - Koge Bugt | 08 / 27 / 2007 | 08 / 27 / 2007 | 3 |
| 2007 | Greenland - Kullorsuaq | 08 / 13 / 2007 | 08 / 13 / 2007 | 3 |
| 2007 | Greenland - Kulusuk | 08 / 08 / 2007 | 08 / 15 / 2007 | 2 |
| 2007 | Greenland - Lynaes Peninsula | 08 / 28 / 2007 | 08 / 28 / 2007 | 2 |
| 2007 | Greenland - Marie Glacier | 08 / 21 / 2007 | 08 / 21 / 2007 | 3 |
| 2007 | Greenland - Mikis Fjord | 08 / 25 / 2007 | 08 / 25 / 2007 | 3 |
| 2007 | Greenland - Narsarsuaq | 08 / 07 / 2007 | 08 / 22 / 2007 | 4 |
| 2007 | Greenland - Niviarsiat Nunatak North (NNVN) | 08 / 13 / 2007 | 08 / 13 / 2007 | 3 |
| 2007 | Greenland - Pilagpik | 08 / 11 / 2007 | 08 / 11 / 2007 | 3 |
| 2007 | Greenland - Qaarsut/Uummannaq | 08 / 24 / 2007 | 08 / 26 / 2007 | 3 |
| 2007 | Greenland - Rinks Isbrae | 08 / 26 / 2007 | 08 / 26 / 2007 | 3 |
| 2007 | Greenland - Sermip Nunatak | 08 / 11 / 2007 | 08 / 11 / 2007 | 3 |
| 2007 | Greenland - Steenstrup Nordre Brae | 08 / 17 / 2007 | 08 / 17 / 2007 | 3 |
| 2007 | Greenland - Tasiilaq | 08 / 15 / 2007 | 09 / 05 / 2007 | 3 |
| 2007 | Greenland - Thule | 08 / 07 / 2007 | 09 / 12 / 2007 | 4 |
| 2007 | Greenland - Timmiarmiut | 08 / 13 / 2007 | 08 / 14 / 2007 | 3 |
| 2007 | Greenland - Trefoldigheden Oer | 08 / 31 / 2007 | 08 / 31 / 2007 | 2 |
| 2007 | Greenland - Upernavik | 08 / 07 / 2007 | 08 / 16 / 2007 | 3 |
| 2007 | Greenland - Upper Timmiarmiut Glacier | 08 / 17 / 2007 | 08 / 17 / 2007 | 3 |
| 2008 | Greenland - Blaso | 07 / 02 / 2008 | 07 / 23 / 2008 | 4 |
| 2008 | Greenland - Gronne Nunatak | 07 / 02 / 2008 | 07 / 23 / 2008 | 4 |
| 2008 | Greenland - Harder Gletscher | 07 / 02 / 2008 | 07 / 23 / 2008 | 4 |
| 2008 | Greenland - Jewell Fjord | 07 / 02 / 2008 | 07 / 23 / 2008 | 4 |
| 2008 | Greenland - Kangerlussuaq | 06 / 23 / 2008 | 07 / 28 / 2008 | 4 |
| 2008 | Greenland - Kangilinnguit | 07 / 02 / 2008 | 07 / 23 / 2008 | 4 |
| 2008 | Greenland - Kap Morris Jessup | 07 / 02 / 2008 | 07 / 23 / 2008 | 4 |
| 2008 | Greenland - Kapisillit | 07 / 02 / 2008 | 07 / 23 / 2008 | 4 |
| 2008 | Greenland - Leffingwell Nunatak | 07 / 02 / 2008 | 07 / 23 / 2008 | 4 |
| 2008 | Greenland - Norske Oer | 07 / 02 / 2008 | 07 / 23 / 2008 | 4 |
| 2008 | Greenland - Nuuk | 07 / 02 / 2008 | 07 / 23 / 2008 | 4 |
| 2008 | Greenland - Sermip Nunatak | 07 / 02 / 2008 | 07 / 23 / 2008 | 4 |
| 2008 | Greenland - Station Nord | 06 / 27 / 2008 | 07 / 24 / 2008 | 4 |
| 2008 | Greenland - Thule | 06 / 25 / 2008 | 07 / 24 / 2008 | 4 |
| 2009 | Greenland - Budolfi Isstrom | 4 | ||
| 2009 | Greenland - Charcot Land | 4 | ||
| 2009 | Greenland - Daneborg | 4 | ||
| 2009 | Greenland - Danmarkshavn | 4 | ||
| 2009 | Greenland - Gamma O | 4 | ||
| 2009 | Greenland - Mestersvig | 4 | ||
| 2009 | Greenland - Vindhjorne | 4 | ||
| 2009 | Greenland - Westfal-Larsen Nunatak | 4 | ||
| 2009 | Greenland - Ymer Nunatak | 4 | ||
| 2010 | Greenland - Kangerlussuaq | 05 / 20 / 2010 | 05 / 28 / 2010 | 2 |
| 2010 | Greenland - Narsarsuaq | 2 | ||
| 2010 | Greenland - Thule | 06 / 25 / 2010 | 07 / 24 / 2010 | 4 |
| 2010 | Greenland - Upernavik | 05 / 20 / 2010 | 05 / 28 / 2010 | 2 |
Project Title: FTS-IR (Infra-Red Fourier Transform Spectrometer) Observations as part of the NDSC (Network for the Detection of Stratospheric Change) (Award# NCARFTSIR)
PI: Coffey, Michael (coffey@ucar.edu)
Phone: (303) 497.1407
Institute/Department: National Center for Atmospheric Research, Atmospheric Chemistry Division
IPY Project? NO
Funding Agency: US\Federal\NSF\GEO\AGS
Program Manager: Ms. Renee Crain (rcrain@nsf.gov)
Discipline(s): | Meteorology and Climate |
| Project Web Site(s): |
| Data: http://www.essl.ucar.edu/LAR/2006/catalog/ACD/coffey.htm |
| Institute: http://www.ndacc.org/ |
Science Summary:
The NCAR solar-viewing Infra-Red Fourier Transform spectrometer is deployed at Thule, Greenland as part of the Network for the Detection of Atmospheric Composition Change (NDACC). It provides total columns of approximately 20 atmospheric trace gases important to understanding the mechanisms of climate change and Arctic ozone loss. It also can retrieve information on the vertical distribution of a subset of those gases at a moderate vertical resolution. The instrument operates autonomously on a daily basis from late February to late October. The NDACC is a global network of high-quality remote-sounding research stations for observing and understanding the physical and chemical state of the atmosphere and its change through time. Data are also key components to satellite validation efforts and are archived for use by researchers worldwide. The NDACC is a major component of the international upper atmosphere research effort and has been endorsed by national and international scientific agencies, including the International Ozone Commission, the United Nations Environment Programme (UNEP), and the World Meteorological Organization (WMO).
Logistics Summary:
The NCAR FTS-IR spectrometer is deployed at Thule, Greenland. Site visits are required at least yearly to maintain and upgrade the instruments. CPS assists the project in making AMC travel and hotel arrangements, and occasionally in the provision of liquid nitrogen or use of a truck.
CPS assists the project in making AMC travel and hotel arrangements, and occasionally in the provision of liquid nitrogen or use of a truck.
| Season | Field Site | Date In | Date Out | #People |
| 2000 | Greenland - Thule | 1 | ||
| 2001 | Greenland - Thule | 1 | ||
| 2002 | Greenland - Thule | 1 | ||
| 2003 | Greenland - Thule | 1 | ||
| 2004 | Greenland - Thule | 03 / 03 / 2004 | 10 / 08 / 2004 | 2 |
| 2005 | Greenland - Thule | 03 / 01 / 2005 | 05 / 31 / 2005 | 1 |
| 2006 | Greenland - Thule | 03 / 01 / 2006 | 03 / 10 / 2006 | 1 |
| 2007 | Greenland - Thule | 03 / 01 / 2007 | 03 / 21 / 2008 | 2 |
| 2008 | Greenland - Thule | 02 / 28 / 2008 | 08 / 08 / 2008 | 1 |
| 2009 | Greenland - Thule | 03 / 01 / 2009 | 03 / 07 / 2009 | 1 |
| 2010 | Greenland - Thule | 03 / 11 / 2010 | 08 / 06 / 2010 | 2 |
| 2011 | Greenland - Thule | 03 / 03 / 2011 | 04 / 15 / 2011 | 2 |
| 2012 | Greenland - Thule | 02 / 23 / 2012 | 03 / 02 / 2012 | 1 |
| 2013 | Greenland - Thule | 03 / 03 / 2013 | 03 / 11 / 2013 | 1 |
Project Title: Aerosol Robotic Network (Award# AERONET)
PI: Holben, Brent (bholben@pop900.gsfc.nasa.gov)
Phone: (301) 614.6658
Institute/Department: National Aeronautical and Space Administration, Goddard Space Flight Center
IPY Project? YES
Funding Agency: US\Federal\NASA
Program Manager: Dr. Michael Kurylo (michael.kurylo@nist.gov)
Discipline(s): | Meteorology and Climate\Atmospheric Science |
| Project Web Site(s): |
| Institute: http://aeronet.gsfc.nasa.gov/ |
Science Summary:
The AERONET (AErosol RObotic NETwork) program is a federation of ground-based remote sensing aerosol networks established by NASA and LOA Photons (Photons/Aeronet Network) and is greatly expanded by collaborators from national agencies, institutes, universities, individual scientists, and partners. The program provides a long-term, continuous and readily accessible public domain database of aerosol optical, mircrophysical and radiative properties for aerosol research and characterization, validation of satellite retrievals, and synergism with other databases. The network imposes standardization of instruments, calibration, processing and distribution. The aerosol properties retrieved will be useful for interpretation of the Fourier Infra-red spectrometer, LiDAR and other measurements made at Thule, Greenland.
Logistics Summary:
This NASA project involves a sun photometer installed on a roof at the Danish Meteorological Institute (DMI), Thule, Greenland to measure column-integrated aerosol properties. In March 2007, Mikhail Sorokine, NASA engineer on this project, travelled toThule to install the photometer, with assistance from DMI colleagues. After Sorokine's departure, DMI personnel assumed routine maintenane of the instrument. NASA intends theThule site to be a multi-year deployment of the AERONET instrument. NASA researchers will return to Thule as needed to calibrate the instrument, make repairs or conduct maintenance. Note: While no one visited Thule in 2008- 2010, the instrument continued to take measurements.
For this project, --CPS will provide Thule clearances and AMC flight coordination if project personnel need to travel to Thule to attend to or remove the instrument. --DMI provided technical and logistical support for the installation and will provide long-term maintenance of the equipment.
| Season | Field Site | Date In | Date Out | #People |
| 2007 | Greenland - Thule | 03 / 14 / 2007 | 03 / 22 / 2007 | 1 |
| 2008 | Greenland - Thule | 0 | ||
| 2009 | Greenland - Thule | 0 | ||
| 2010 | Greenland - Thule | 0 | ||
| 2011 | Greenland - Thule | 0 |
Project Title: Millimeter-wave spectrometer at Thule (Award# GBMS)
PI: Muscari, Giovanni (muscari@ingv.it)
Phone: 39(065) 186.0724
Institute/Department: Istituto Nazionale di Geofisica e Vulcanologia,
IPY Project? YES
Funding Agency: IT\Research/Higher Ed\U. Rome
Program Manager: Ms. Renee Crain (rcrain@nsf.gov)
Discipline(s): | Legacy Projects | Meteorology and Climate\Atmospheric and Remote Sensing |
| Project Web Site(s): |
| IPY: http://www.ipy.org/development/eoi/proposal-details.php?id=9... |
| Initiative: http://www.ndacc.org/ |
| Logistics: http://www.polar.ch2m.com/Files/PDFs/MuscariGBMS2009PlanFina... |
Science Summary:
The State University of New York at Stony Brook (SUNY) and the University of Rome “La Sapienza” (URome) have been collaborating for the past 7 years, operating a millimeter-wave spectrometer (GBMS) from Thule (winter campaigns 2001-2002 and 2002-2003) and from the Alpine site of Testa Grigia (11,500 feet above sea level, Italy, from 2003 onwards). Support for this research work, aimed also at contributing to the NASA EOS Aura satellite validation, was provided by NASA (under Grant NAG513029) and by the Italian Polar Program (PNRA). Personnel from URome have also been operating a LiDAR system from Thule Air Base at various times since 1990, and concurrently to the GBMS activity during winters 2001-2002 and 2002-2003. Both the GBMS and the LiDAR in Thule are among the ground-based instruments enrolled in the Network for the Detection of Atmospheric Composition Change (NDACC, formerly known as Network for the Detection of Stratospheric Change), also widely involved in the EOS Aura satellite validation plan. Data obtained with these two instruments are made available to the scientific community belonging to the NDACC international network. As part of an International Polar Year (IPY) research activity, ORACLE-O3 (Activity ID# 99), involving more than 15 different countries and even more research institutes (including the US Jet Propulsion Laboratory and Naval Research Laboratory), both the GBMS and the LiDAR will be operated from Thule AB during IPY winter 2008-2009. Operations will be run by personnel of URome and of the Istituto Nazionale di Geofisica and Vulcanologia (INGV).
Logistics Summary:
In contribution to the IPY ORACLE-03 program and the Network for the Detection of Atmospheric Composition Change (NDAAC), collaborators from URome and INGV will operate the GBMS and a LiDAR at Thule Air Base during the IPY winter of 2008/2009. Two scientists will travel to Thule in winter 2006-2007 to run maintenance on the LiDAR and prepare it for the following winter, when the first IPY field campaign is scheduled. (There was no travel to Thule in 2007/2008). Early the second week of January 2009, the PI and a colleague will travel to Thule Air Base and establish a presence (the PI will remain at Thule for the duration of the field season while other personnel rotate through). After initial set up is complete several days later, the first of two shipments of liquid nitrogen will arrive (to be used to maintain data quality). About January 22, two additional personnel will arrive at Thule to assist with the experiment; a week later, one from the initial team will depart Thule. In early February, a second shipment of LN2 will resupply the experiment stocks, and a field team member will depart the station several days later. The PI will remain on station with one colleague to complete the experiment, and both will depart about 6 March. When possible, the PI will combine logistics for this project with that of the DeZafra grant (0936365). Late in 2009, field work includes the installation of a liquid Nitrogen generator at Thule funded by the DeZafra grant. Then, two of the Muscari field team members will be supported with DeZafra logistics funds, spending a week or so installing/troubleshooting the new generator. In 2011, the PI and two team members will travel to Thule under DeZafra logistics funds. The visit will take place from late January to mid March. See DeZafra (0936365) for more information.
CPS will arrange for Thule clearances, cargo on Airbus and AMC, shipment of LN2, and provide reimbursable AMC tickets. The investigators will arrange for and pay all other logistics expenses from their grant(s).
| Season | Field Site | Date In | Date Out | #People |
| 2006 | Greenland - Thule | 12 / 07 / 2006 | 12 / 31 / 2006 | 2 |
| 2007 | Greenland - Thule | 01 / 01 / 2007 | 02 / 20 / 2007 | 2 |
| 2009 | Greenland - Thule | 01 / 08 / 2009 | 03 / 06 / 2009 | 4 |
| 2010 | Greenland - Thule | 0 | ||
| 2011 | Greenland - Thule | 0 |
Project Title: IPY: Collaborative Research: Study of arctic ecosystem changes in the IPY using the International Tundra Experiment (Award# 0632277)
PI: Oberbauer, Steven F (oberbaue@fiu.edu)
Phone: (305) 348.2580
Institute/Department: Florida International University, Department of Biological Sciences
IPY Project? YES
Funding Agency: US\Federal\NSF\OD\OPP\ARC\ARCSS\AON
Program Manager: Dr. Martin Jeffries (mjeffrie@nsf.gov)
Discipline(s): | Biology |
Science Summary:
This collaborative project is composed of the following: 0632277 (Oberbauer, Florida International University, LEAD), 0632184 (Welker, UAA), 0632144 (Klein, CSU) and 0632263 (Hollister, GVSU) and will use isotopes and remote sensing to measure phenology, community composition, and ecosystem properties in response to background climate changes and to long-term warming treatments in continuation of work begun under the International Tundra Experiment (ITEX). The overarching goals of this project are to use the sampling power of the International Tundra Experiment (ITEX) Network to quantify changes in phenology, vegetation, and ecosystem properties that have occurred in tundra over the past 10-15 years in response to climate change and experimental warming, and to use the Network as the foundation for monitoring and prediction of future changes. Among the earliest signals of climate warming in the Arctic have been changes in the seasonal timing of life cycle events (phenology). Plants are leafing, flowering, and fruiting earlier than ever recorded. Because phenology and physiology are tightly coupled, ecosystem functions such as primary production, as well as the outcome of competition depend on phenological responses. Species phenological and physiological responses to warming differ, causing changes in community composition, biodiversity, and ecosystem function. However, in contrast to phenology, change in community composition is difficult to detect and ascribe to a particular phenomenon. Changes in phenology and species abundance being reported across the Arctic are consistent with the findings of the long-term experimental warming of the ITEX network, a plot-scale, nondestructive, warming experiment conducted across the tundra biome beginning in 1990. Remote sensing analyses have also detected earlier greening and increased biomass across polar regions, but cannot readily identify the basis for changes in community composition, can only infer function, and can say nothing about community trajectories. Intellectual merit: The ITEX network was specifically designed to study phenology and community composition, and has also been used effectively to study ecosystem processes. The ITEX network is perfectly positioned for an intensive, comprehensive study of decadal-scale changes in phenology, community composition, and ecosystem function in response to background climate change, and has the added value of long-term experimental warming. The baseline data and sampling power of the ITEX network and its experimental approach are unparalleled. We will compare the results of a renewed field campaign of phenology and plant community composition measurements on warmed and control plots during the IPY with our historical data from 10-15 years ago. The investigators will run two workshops to synthesize the long-term phenological and community changes observed across the network. Furthermore, a new suite of minimally invasive measurements will cross compare indices of ecosystem function - including: leaf, litter, and soil nutrients; isotopic composition; and secondary chemistry - in the control and warmed plots across the network. The long-term nature of these experiments and the global coverage of the coordinated network will lead to unique insights regarding the tundra response to past, ongoing, and future climate changes. Broader Impacts: This study will provide research opportunities and training for two young investigators, a postdoctoral fellow, and graduate, undergraduate, and high school students. The investigators will also actively seek participation of underrepresented residents of the community at Barrow, Alaska, and have incorporated public awareness components about the teleconnections between the Arctic and the Earth System in the communities of Anchorage, AK and Miami, FL. The findings of this work will be published as broadly synthetic works of international interest. Because of teleconnections, findings of this circumpolar project will be of general importance to decision makers. Finally, meetings of the ITEX network will provide a learning experience rich in synthetic understanding of topics from a variety of international and cultural viewpoints. Relevance to IPY: This project meets the goals of the IPY program as an international network with a strong research, networking and outreach components studying effects of warming and climate variability on ecosystems in the Arctic. The ITEX network has been specifically endorsed the IPY Secretariat as project #188 as demonstrating a high level of adherence to IPY themes and goals. A related endorsement of the Circumarctic Terrestrial Biodiversity (CAT-B) initiative, an offshoot of ITEX, is further evidence of the relevance of this program to IPY. The project will also link with other IPY themes including Back to the Future and The Greening of the Arctic.
Logistics Summary:
This collaborative project is composed of the following: 0632277 (Oberbauer, Florida International University, LEAD), 0632184 (Welker, UAA), 0632144 (Klein, CSU) and 0632263 (Hollister, GVSU). The research represents the US contribution to an international effort to remeasure sites in the International Tundra Experiment (ITEX) during IPY. The researchers will revisit ITEX sites at Toolik Lake, Barrow, and Atqasuk, Alaska; Thule, Greenland; Niwot Ridge, Colorado; and the Tibetan Plateau, China. This database will focus on information for the arctic sites. The following list describes each PI's field assignment: 0632277 (Oberbauer, LEAD): Toolik, Alaska 0632184 (Welker): Toolik, Alaska and Thule, Greenland and Kangerlussuaq, Greenland 0632263 (Hollister): Barrow and Atqasuk, Alaska 0632144 (Klein): Niwot Ridge, Colorado, and Tibetan Plateau, China (field season information for this work will not be carried in this database) For the Oberbauer component of the collaboration, during 2007 and 2008 a team totaling 5 (one staying the entire season, the others making occasional visits) will measure phenology, community composition, and ecosystem properties using isotopes and remote sensing on the ITEX plots at Toolik at regular intervals over the growing season. They also will complete a one-time community analysis of the Walker 1 km2 community grids at Imnavait Creek and Toolik (a contractor will assist with some of this work at Imnavait Creek). Similar work will be conducted at Barrow and around the Arctic. For the Welker component of the collaboration, from 2007-2009 a team of 3 will spend mid-May to mid-September at Toolik Field Station. For the Welker Greenland work, teams will visit sites established at Thule, Greenland, twice annually during 2007 and 2008, and then remain on-site from late May to late August in 2009. For 2008, in addition to the work at Thule, the PI will field a team based from Kangerlussuaq for collaborative studies with Eric Post related to ITEX. At the end of May, a team of 3 will arrive in Kangerlussuaq and establish the experiment there. The PI will travel to Thule about a week later to visit the ITEX sites there, before returning briefly to Kangerlussuaq and departing the island mid-June. Meanwhile the other two researchers will remain in Kangerlussuaq collecting data until late August. At that time, one will depart Greenland via the ANG. The other will travel to Thule to complete the season’s ITEX work. At the same time, he will reestablish a warming experiment funded under the PI’s former BE grant, 0221606. As the two tasks are complete about a week later, the researcher will depart Greenland as well. A team of five will return to Kangerlussuaq in 2009, conducting research from mid-May to late August. NSF support for the 2009 Kangerlussuaq work will be provided on a not-to-interfere basis. For the Hollister component of the collaboration, in 2007 and 2008, a total of 5 researchers will make trips to Barrow and Atqasuk, Alaska, to resample ITEX (International Tundra Experiment) sites. Note: The PI will receive a Research Experiences for Undergraduates (REU) supplement (0735254) for an additional 10 Barrow and 59 Atqasuk user days during 2007.
For this project, --At Toolik, CPS will provide user days and vehicle rentals. At Thule, CPS will arrange and pay for airfare (AMC or other available flights if AMC is booked), lodging, lab space, truck rentals and safety/communications gear. The PI will arrange/pay for the researchers’ transportation to Thule from Kangerlussuaq (if any). For the Kangerlussuaq-based work, CPS will provide ANG flights for pax/cargo between Scotia and Kangerlussuaq, some camping and safety gear, and arrange for lodging/lab space in KISS. This support is provided on a not-to-interfere basis, and the PI will pay for associated costs directly. --BASC will provide access to infrastructure and services in Barrow and Atqasuk (user days are estimated at 153 in Barrow and 82 in Atqasuk for 2007 and 2008. --IAB will provide access to infrastructure and services at Toolik. All other support will be arranged by the researchers and funded from the grants.
| Season | Field Site | Date In | Date Out | #People |
| 2007 | Alaska - Atqasuk | 1 | ||
| 2007 | Alaska - Barrow | 1 | ||
| 2007 | Alaska - Imnavait Creek | 4 | ||
| 2007 | Alaska - Toolik | 05 / 24 / 2007 | 08 / 23 / 2007 | 10 |
| 2007 | Greenland - Thule | 05 / 24 / 2007 | 08 / 24 / 2007 | 4 |
| 2008 | Alaska - Atqasuk | 1 | ||
| 2008 | Alaska - Barrow | 1 | ||
| 2008 | Alaska - Toolik | 6 | ||
| 2008 | Greenland - Kangerlussuaq | 05 / 28 / 2008 | 09 / 05 / 2008 | 3 |
| 2008 | Greenland - Thule | 06 / 06 / 2008 | 09 / 12 / 2008 | 2 |
| 2009 | Alaska - Toolik | 05 / 15 / 2009 | 09 / 15 / 2009 | 3 |
| 2009 | Greenland - Kangerlussuaq | 05 / 27 / 2009 | 08 / 24 / 2009 | 5 |
| 2009 | Greenland - Thule | 05 / 28 / 2009 | 08 / 21 / 2009 | 5 |
Project Title: IPY: Microbial winter survival physiology: a driver on microbial community composition and carbon cycling (Award# 0733074)
PI: Schimel, Joshua P (schimel@lifesci.ucsb.edu)
Phone: (805) 893.7688
Institute/Department: U of California, Santa Barbara, Dept. Ecology, Evolution & Marine Biology and Envir. Studies
IPY Project? YES
Funding Agency: US\Federal\NSF\OD\OPP\ARC\ARCSS
Program Manager: Dr. Neil Swanberg (nswanber@nsf.gov)
Discipline(s): | Biology |
Science Summary:
Arctic landscapes are changing rapidly. The "greening" and "shrubification" of the Arctic drive climate feedbacks (via albedo and energy exchange) as well as affecting human activities directly. Vegetation change, however, is driven belowground by nutrient availability, a result of microbial feedbacks that also have independent effects on the climate system (e.g. CO2 and CH4 emissions). The microbial system, therefore, plays a key role in regulating the functioning of the overall Arctic System. As organisms migrate and spread across the Arctic, the processes they regulate migrate with them. Predicting changes in the pattern of tundra biogeochemistry therefore requires understanding the factors that regulate the distribution and functioning of key groups of microbes. Are bacteria and fungi regulated simply by the chemical substrates available to them, and thus by plant distribution? Or alternatively, are microbes independently regulated by the challenges of tolerating the freezing conditions of winter? What are microbial adaptations to low temperature, and what are their ecological consequences? These are interesting questions for basic microbial ecology, but are also important in the context of the changing Arctic. The core hypotheses of this project are: 1) the distribution of specific microbial groups is controlled primarily by plant community composition, but 2) the challenge of acclimating to winter requires changes in membrane composition, cryoprotectants, and freeze-tolerance proteins that involve physiological costs to microbes that have important implications for overall ecosystem function. Hypotheses will be tested by analyzing patterns of microbial distribution and physiology across toposequences in Alaska (low Arctic) and Greenland (high Arctic), capturing latitude and plant community variation. Seasonal changes (pre- and post-freeze, pre- and post-thaw) will be assessed by using clone library and quantitative genetic analyses (QPCR) to evaluate microbial community composition. Microbial membrane chemistry (phospholipids) and cryoprotectants (amino acids, trehalose, polyols) will be assessed by chemical analyses. Shifts in protein production patterns, including anti-freeze proteins, chaperones, and others will be assessed using proteomic techniques. This work will be supported by laboratory studies evaluating specific aspects of freezing stress: rate, temperature, and duration. It will be integrated with other studies on pan-Arctic microbial population dynamics by collaboration with the ICSU MERGE network. This will be the first ever study on how stress physiology regulates microbial distributions.
Logistics Summary:
Researchers on this project will study microbial dynamics in the low Arctic of northern Alaska and the high Arctic of northern Greenland during consecutive seasons beginning in 2007 and ending in 2010. To make the observations required of parallel transects over dry, moist, and wet tundra, teams will visit the research sites throughout the year during the course of the investigation. In 2007, a research team of 3 will travel to Thule, Greenland, in mid-October where they will spend about 1 week; and to Toolik Field Station, Alaska, in mid-November traveling via truck from Fairbanks. At these places, the researchers will establish their experiments in order to capture the 2007 freeze cycle. In 2008, a research team of 2-3 people will focus on Alaska work, visiting Toolik 4 times in the year. In 2009, a team of two will visit Toolik, Alaska, in May. A team of two will visit Thule, Greenland, in August and 3 will visit again in October. In 2010, two teams will return to Thule, two people for a week late in May, and two people for a week in late June. Also, 2 people will visit Toolik for 2 days in May. Teams will take soil samples and collect litter (leaves, etc.) during each of these trips for later analysis at the home institutions. This project will be integrated with other studies on pan-Arctic microbial population dynamics by collaboration with the ICSU MERGE network.
IAB will provide access to infrastructure and services at Toolik Field Station. CPS will provide clearances, lodging, office space, Internet access, truck rental, and cold weather gear (as needed) for work at Thule. For work at Toolik, CPS will pay for user days, truck rentals and cold weather gear (as needed). (For the 2007 season at Thule, CPS would have provided helicopter support to install the experiments if needed. In the end, the helicopter was not needed to acess the sites. CPS will work with the PI (and NSF if needed) to determine the best support based on whether the road to the sites is open at the time of installation.)
| Season | Field Site | Date In | Date Out | #People |
| 2007 | Alaska - Toolik | 11 / 05 / 2007 | 11 / 09 / 2007 | 3 |
| 2007 | Greenland - Thule | 10 / 11 / 2007 | 10 / 19 / 2007 | 3 |
| 2008 | Alaska - Toolik | 3 | ||
| 2009 | Alaska - Toolik | 05 / 17 / 2009 | 05 / 24 / 2009 | 2 |
| 2009 | Greenland - Thule | 5 | ||
| 2010 | Greenland - Thule | 05 / 20 / 2010 | 07 / 02 / 2010 | 4 |
Project Title: BE/CBC: Coupling of Carbon and Water Cycles in a Cold, Dry Ecosystem: Integrative Physical, Chemical and Biological Processes and their Controls on CO2 Exchange (Award# 0221606)
PI: Welker, Jeffrey M (afjmw1@uaa.alaska.edu)
Phone: (907) 257.2701
Institute/Department: U of Alaska, Anchorage, Environment and Natural Resources Institute
IPY Project? NO
Funding Agency: US\Federal\NSF\OD\OPP\ARC\ARCSS
Program Manager: Dr. Neil Swanberg (nswanber@nsf.gov)
Discipline(s): | Biology |
| Project Web Site(s): |
| Institute: http://depts.washington.edu/icylands/ |
| Media: http://uwnews.washington.edu/ni/article.asp?articleID=13908 |
| NSF_Award_Info: http://www.nsf.gov/awardsearch/showAward.do?AwardNumber=0221... |
| Logistics: http://www.polar.ch2m.com/Files/Documents/WelkerBECBC2007Pla... |
| Logistics: http://www.polar.ch2m.com/Files/PDFs/Welker2006Plan.pdf |
| Logistics: http://www.polar.ch2m.com/Files/PDFs/WelkerSlettenPPMay27.pd... |
Science Summary:
In the High Arctic, the carbon cycle—the process by which plants take carbon from the air, convert it (with the help of the sun) into energy for growth, and then return it to the air as carbon dioxide through respiration—is limited by lack of moisture, low temperatures, and the scarcity of nutrients. But with climate change, several of these limitations may be modified. Jeff Welker (Colorado State University, Fort Collins) will lead a team working near Thule to study the consequences of climate change on the exchange of carbon between High Arctic tundra ecosystems and the atmosphere. They also will look at the degree to which soil physical processes and soil mineral nutrition affect plant processes like photosynthesis and respiration. How will they do this? A field team will set up snow fences on selected sites to increase snow depth. They also will warm three types of tundra using open-topped chambers. The research teams will then use closed-chamber techniques to quantify carbon dioxide exchange over the entire year, and they will collect plants and soils to describe soil microbial dynamics, soil water content, plant water status and plant mineral nutrition. They anticipate that more snow in winter, leading to more snow-melt water in summer, when combined with warmer summer temperatures, will have the greatest effect on carbon cycling and may alter the carbon budget of high arctic ecosystems. These studies will help scientists better understand how a cold, dry ecosystem may respond to climate change--and how these changes may affect arctic and global carbon budgets.
Logistics Summary:
For this project field team members will conduct weekly experiments on carbon and water cycles in the Arctic environment from Thule Air Base in Greenland and Toolik Field Station in Alaska. Field teams ranging in size from three to 25 will travel to Thule each summer throughout the life of the grant (2002-2008), though the project expects a continuous presence between May and late August each year. In 2004 and 2005, two team members will conduct comparative studies between their ITEX snow fence experiment at Toolik Lake and at Thule. In 2005, and 2007, three team members will conduct comparative studies at lakes around the Kangerlussuaq area. In July of 2005 the project will host a three-week High Arctic field course at Thule. Project researchers will instruct the group of 12 (mostly) undergraduate students in basic skills in arctic research. Participants will then complete small group projects. Fieldwork will base at the project’s experimental sites at Thule Air Base, but will also include 8-10 days of camping at several locations approximately 20 minutes away from Thule via helicopter. Also participating in the field course will be a participant from the TREC program. For 2006, the team plans a field season similar to that of 2004 at Toolik Lake. At Thule, they anticipate a spring trip for one week (2 people) a summer trip for 6-8 people, and a fall visit in October. The team plans to complete trench work and continue the ecological and soil studies along with the hydrological and microclimate monitoring. They wish to visit Green Valley for several days once or twice during the field season to collect data and various samples, and monitor their experiments. They also wish to receive UNAVCO assistance to re-measure the 20 GPS monuments installed in 2005 (at Green Valley, Polar Desert, North Mountain and South Mountain) and to install an additional five to determine the annual downslope movement. They plan to further their analysis of microbial-plant interactions (especially N cycling) and work to articulate the temporal linkages of major physical-chemical and biological processes. In addition, they will be further examining plant-animal interactions in the Green Valley for comparative studies. In 2007, work at Thule will be similar to the 2006 effort, with a spring trip for one week in the spring. UNAVCO will again provide support to maintain the GPS array. In 2008, Co-PI Ron Sletten will visit Thule for a week in late summer to download data and perform routine maintenance. In addition, researchers working on the PI's ITEX project (0612534) also will restart this project's heat lamp experiment. In Alaska and Greenland, CPS will provide user days and truck use. In addition, for Thule visits prior to 2008, CPS will provide AMC clearances/ticketing for personnel and cargo, helicopter support, field gear, construction support, power, and lab/work space at the Peregrine Fund research center. For the Thule work in 2008, CPS will provide AMC clearances/ticketing, and truck rental days (1 week). All other costs will be paid for by the grant, including the 2008 costs of reestablishing/maintaining line power to the refurbished warming experiment.
| Season | Field Site | Date In | Date Out | #People |
| 2002 | Greenland - Thule | 09 / 19 / 2002 | 09 / 27 / 2002 | 4 |
| 2003 | Greenland - Thule | 06 / 01 / 2003 | 09 / 01 / 2003 | 12 |
| 2004 | Alaska - Toolik | 05 / 17 / 2004 | 09 / 19 / 2004 | 2 |
| 2004 | Greenland - Thule | 04 / 01 / 2004 | 09 / 03 / 2004 | 14 |
| 2005 | Alaska - Toolik | 06 / 05 / 2005 | 08 / 25 / 2005 | 2 |
| 2005 | Greenland - Kangerlussuaq | 06 / 30 / 2005 | 09 / 02 / 2005 | 18 |
| 2005 | Greenland - Thule | 03 / 17 / 2005 | 09 / 23 / 2005 | 30 |
| 2006 | Alaska - Toolik | 05 / 22 / 2006 | 11 / 10 / 2006 | 6 |
| 2006 | Greenland - Thule | 04 / 06 / 2006 | 09 / 15 / 2006 | 16 |
| 2007 | Greenland - Kangerlussuaq | 07 / 23 / 2007 | 07 / 27 / 2007 | 1 |
| 2007 | Greenland - Thule | 04 / 05 / 2007 | 09 / 15 / 2007 | 14 |
| 2008 | Greenland - Thule | 09 / 10 / 2008 | 09 / 19 / 2008 | 2 |
Project Title: IPY: Collaborative Research: Study of arctic ecosystem changes in the IPY using the International Tundra Experiment (Award# 0632184)
PI: Welker, Jeffrey M (afjmw1@uaa.alaska.edu)
Phone: (907) 257.2701
Institute/Department: U of Alaska, Anchorage, Environment and Natural Resources Institute
IPY Project? YES
Funding Agency: US\Federal\NSF\OD\OPP\ARC\ARCSS\AON
Program Manager: Dr. Martin Jeffries (mjeffrie@nsf.gov)
Discipline(s): | Biology |
Science Summary:
This collaborative project is composed of the following: 0632277 (Oberbauer, Florida International University, LEAD), 0632184 (Welker, UAA), 0632144 (Klein, CSU) and 0632263 (Hollister, GVSU) and will measure phenology, community composition, and ecosystem properties using isotopes and remote sensing in continuation of work begun under the International Tundra Experiment (ITEX) and will also conduct investigations of the effects of long term warming. Science Objectives: The overarching goals of this project are to use the sampling power of the International Tundra Experiment (ITEX) Network to quantify changes in phenology, vegetation, and ecosystem properties that have occurred in tundra over the past 10-15 years in response to climate change and experimental warming, and to use the Network as the foundation for monitoring and prediction of future changes. Among the earliest signals of climate warming in the Arctic have been changes in the seasonal timing of life cycle events (phenology). Plants are leafing, flowering, and fruiting earlier than ever recorded. Because phenology and physiology are tightly coupled, ecosystem functions such as primary production, as well as the outcome of competition depend on phonological responses. Species phenological and physiological responses to warming differ, causing changes in community composition, biodiversity, and ecosystem function. However, in contrast to phenology, change in community composition is difficult to detect and ascribe to a particular phenomenon. Changes in phenology and species abundance being reported across the Arctic are consistent with the findings of the long-term experimental warming of the ITEX network, a plot-scale, nondestructive, warming experiment conducted across the tundra biome beginning in 1990. Remote sensing analyses have also detected earlier greening and increased biomass across polar regions, but cannot readily identify the basis for changes in community composition, can only infer function, and can say nothing about community trajectories. Intellectual merit: The ITEX network was specifically designed to study phenology and community composition, and has also been used effectively to study ecosystem processes. The ITEX network is perfectly positioned for an intensive, comprehensive study of decadal-scale changes in phenology, community composition, and ecosystem function in response to background climate change, and has the added value of long-term experimental warming. The baseline data and sampling power of the ITEX network and its experimental approach are unparalleled. We will compare the results of a renewed field campaign of phenology and plant community composition measurements on warmed and control plots during the IPY with our historical data from 10-15 years ago. The investigators will run two workshops to synthesize the long-term phenological and community changes observed across the network. Furthermore, a new suite of minimally invasive measurements will cross compare indices of ecosystem function - including: leaf, litter, and soil nutrients; isotopic composition; and secondary chemistry - in the control and warmed plots across the network. The long-term nature of these experiments and the global coverage of the coordinated network will lead to unique insights regarding the tundra response to past, ongoing, and future climate changes. Broader Impacts: This study will provide research opportunities and training for two young investigators, a postdoctoral fellow, and graduate, undergraduate, and high school students. The investigators will also actively seek participation of underrepresented residents of the community at Barrow, Alaska, and have incorporated public awareness components about the teleconnections between the Arctic and the Earth System in the communities of Anchorage, AK and Miami, FL. The findings of this work will be published as broadly synthetic works of international interest. Because of teleconnections, findings of this circumpolar project will be of general importance to decision makers. Finally, meetings of the ITEX network will provide a learning experience rich in synthetic understanding of topics from a variety of international and cultural viewpoints. Relevance to IPY: This project meets the goals of the IPY program as an international network with a strong research, networking and outreach components studying effects of warming and climate variability on ecosystems in the Arctic. The ITEX network has been specifically endorsed the IPY Secretariat as project #188 as demonstrating a high level of adherence to IPY themes and goals. A related endorsement of the Circumarctic Terrestrial Biodiversity (CAT-B) initiative, an offshoot of ITEX, is further evidence of the relevance of this program to IPY. The project will also link with other IPY themes including Back to the Future and The Greening of the Arctic.
Logistics Summary:
This collaborative project is composed of the following: 0632277 (Oberbauer, Florida International University, LEAD), 0632184 (Welker, UAA), 0632144 (Klein, CSU) and 0632263 (Hollister, GVSU). The research represents the US contribution to an international effort to remeasure sites in the International Tundra Experiment (ITEX) during IPY. The researchers will revisit ITEX sites at Toolik Lake, Barrow, and Atqasuk, Alaska; Thule, Greenland; Niwot Ridge, Colorado; and the Tibetan Plateau, China. This database will focus on information for the arctic sites. Logistics for the collaboration are carried under grant 0632277, Oberbauer, in this database. For the Welker component of the collaboration, from 2007-2009 a team of 3 will spend mid-May to mid-September at Toolik Field Station. Logistics for the Welker Toolik work are carried under 0612534, another grant held by Welker with Toolik work. The field team will be combined and documented under 0612534 in this database.
For the field support summary (scope) for this collaborative, please see the record for grant 0632277 in this database.
| Season | Field Site | Date In | Date Out | #People |
| 2007 | Alaska - Toolik | 0 | ||
| 2007 | Greenland - Thule | 0 | ||
| 2008 | Alaska - Toolik | 0 | ||
| 2008 | Greenland - Kangerlussuaq | 0 | ||
| 2008 | Greenland - Thule | 0 | ||
| 2009 | Alaska - Toolik | 0 | ||
| 2009 | Greenland - Kangerlussuaq | 0 | ||
| 2009 | Greenland - Thule | 0 |
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