Arctic Field Projects
Project Title: Turbulent Mixing, Internal Waves, and Intrusions: Temporal and Spatial Variability of Resource Supply and Metabolic Activity in Lakes (Award# 0640953)
PI: MacIntyre, Sally (sally@eri.ucsb.edu)
Phone: (805) 893.3951
Institute/Department: U of California, Santa Barbara, Marine Science Institute
IPY Project? NO
Funding Agency: US\Federal\NSF\BIO\DEB
Program Manager: (arussell@nsf.gov )
Discipline(s): | Biology |
| Project Web Site(s): |
| Logistics: http://www.polar.ch2m.com/Files/Documents/HobbieLTER2007Pla... |
| Data: http://ecosystems.mbl.edu/ARC/ |
| Institute: http://www.icess.ucsb.edu/biogeo/biogeo.html |
| Institute: http://www.lifesci.ucsb.edu/eemb/faculty/macintyre/index.htm... |
| NSF_Award_Info: http://www.nsf.gov/awardsearch/showAward.do?AwardNumber=0640... |
| Logistics: http://www.polar.ch2m.com/Files/PDFs/Hobbie-LTERPlanFinal200... |
| Logistics: http://www.uaf.edu/toolik/ |
Science Summary:
In this continuation of work under Dr. MacIntyre’s previous grant (0108572), the principle investigator has found that turbulence production in the upper mixed layer, thermocline and bottom waters of lakes is intensified when frontal systems which induce cooling and higher winds pass through a region. The amplitude of internal waves, whose breaking causes turbulence, increases during these events and varies with bottom slope. In addition, these frontal systems induce stream inflows which spread into lakes at various depths as a function of temperature and discharge. Consequently, during storm events, researchers can now envision hot spots where solute fluxes and metabolic activity are intensified and cold spots where change is only possible if currents transport water from hot spots. The work under this grant will build upon this knowledge to design experiments to locate these hot and cold spots and quantify the bacterial and primary productivity. Via time series arrays, collaborative modeling efforts, and adaptive sampling based on real time data on the physical state of the lakes, researchers will be positioned to more accurately quantify lacustrine bacterial and primary productivity than ever before.
Logistics Summary:
This grant is a continuation of Dr. MacIntyre’s work on physical transport processes in lakes around Toolik, Alaska (grant 0108572). Work will again be conducted from a base at Toolik Field Station and in conjunction with the LTER projects in the area in efforts to understand how physical forcings in lakes affect and control ecosystem function. Annually, from 2007 to 2009, the field team of 3 will conduct research at Toolik Lake and Lakes E5 and E6. Two researchers will spend about 2 months at the station, while the PI will spend about 2 weeks there. The work will include installation of time series temperature moorings in these three lakes and event sampling to characterize internal waves and resulting solute fluxes and biological changes; and to capture the effects of incoming streams on lake metabolism and other processes. The researchers also will make measurements for comparative purposes in a few nearby lakes. The PI will receive an REU supplement to her grant for the 2008 season.
For this project, --CPS will provide user days. --IAB will provide access to infrastructure and services at Toolik. All other support will be arranged and paid for by the PI through the grant.
| Season | Field Site | Date In | Date Out | #People |
| 2007 | Alaska - Toolik | 06 / 18 / 2007 | 08 / 13 / 2007 | 4 |
| 2008 | Alaska - Toolik | 3 | ||
| 2009 | Alaska - Toolik | 3 |
Generated from:
