Frozen Arctic Lakes as Biogeochemical Hotspots
Expedition Dates: April 12-20, 2018 and June 18-July 9, 2018
Field Team Members/Affiliations: Jasmine Saros, Ben Burpee, Robert Northington (Husson University), Jim Almendinger (St Croix Watershed Research Station)
Expedition Funding Acknowledgement: UMaine
This project employs sensor-based and direct monitoring of Arctic lakes in the Kangerlussuaq area of West Greenland to examine under ice processes related to the carbon cycle. The combination of repeated monitoring of a small set of lakes through time and a single survey across a broader suite of lakes allows examination of the research questions at multiple scales. Our primary goal in 2018 was to monitor changes in net ecosystem productivity, gross primary productivity and respiration continuously using sensor arrays through the ice-covered to ice-free period in two lakes. Sensors to monitor temperature, oxygen, and light at 10-minute resolution were deployed in mid-April 2018 through lake ice, and retrieved in mid-summer. The data revealed dynamic changes under ice, including ample light conditions for primary production.