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MODELING THE EFFECTS OF CHANGING ARCTIC SEA ICE ON ECOSYSTEM AND WATER COLUMN STRUCTURE

Related Research Areas
Carbon Cycle & Ecosystems, Climate Variability & Change
Project Description
PRIMARY RESEARCH QUESTION: How do changes in Arctic sea ice and ocean hydrography over the past few decades effect fragile marine ecosystems? RESEARCH SUB-QUESTIONS AND HYPOTHESES 1) How are physical environmental changes in the pan-Arctic (air temperatures, winds, sea ice) affecting water column stability and structure? (a) Warm air/changes in winds/more open water -> increase stratification (b) Increase in air temps and increase in winds -> not additive 2) How are changes in ice and nutrients affecting phytoplankton? (a) Longer growing season in Pac. NW -> less nutrients entering Arctic through the Bering Strait (b) Earlier retreat of ice -> increase in primary production early in season, but similar quantity integrated over entire season 3) How do changes in sea ice feedback to the C-cycle? (a) Over the shelves: food web is fueled -> increased C export to sediments (b) Over the deep ocean: food web is fueled, but the increase in C-uptake in the surface is remineralized before reaching the deep ocean floor.
Project Administrator(s):
Tasha Reddy,
JENNIFER DUNGAN

Members

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Tasha Reddy
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JENNIFER DUNGAN