OS004
Changes in light availability in the Arctic and sub-Arctic system and effects on biophysical processes

Session ID#: 157050

Session Description:
The photoperiod of high-latitude environments is highly seasonal and exerts a strong control on ecosystem function throughout the annual cycle.  At the same time, the current decline in Arctic sea ice extent and thickness in recent years has reduced the surface albedo in many areas and increased the absorption of solar radiation by the ocean.  A number of changes to the biophysical system in the Arctic have been predicted as the decline of sea continues and the melt season arrives earlier in the year, including a warming of SST and increased primary production.  We also expect to see changes in the biogeochemical processes (e.g., the photodegradation of DOM) and some of these changes may already be underway.  How are physical systems and ecosystems changing in response to increased light availability in the ocean and in the sea ice?  How will earlier and increased light availability in spring change the timing of biophysical processes and what are the consequences?  We invite presentations on biophysical processes that occur throughout the Arctic Ocean and shelf seas, as well as sub-Arctic seas such as the Bering, Nordic, and Barents seas.  A diverse range of methods is needed to answer these questions and we welcome modeling and observational work equally.
Co-Organized:
  • C - Cryosphere
  • GC - Global Environmental Change
Index Terms:

4207 Arctic and Antarctic oceanography [OCEANOGRAPHY: GENERAL]
4255 Numerical modeling [OCEANOGRAPHY: GENERAL]
4262 Ocean observing systems [OCEANOGRAPHY: GENERAL]
4264 Ocean optics [OCEANOGRAPHY: GENERAL]

Primary Convener:  Jaclyn L Clement Kinney, Naval Postgraduate School, Monterey, CA, United States
Conveners:  Karen E Frey, Clark University, Graduate School of Geography, Worcester, MA, United States and Younjoo Lee, Naval Postgraduate School, Monterey, CA, United States
 
How Dissolved Organic Matter Composition Responds to Changes in Sea Ice Cover in the western Arctic Ocean. (1082080)
Celine Gueguen, University of Sherbrooke, Sherbrooke, QC, Canada
 
Light Transmittance and Potential Solar Heating of the Ocean Water Column Across the Distributed Biological Observatory Sites in the Northern Bering and Chukchi Seas (1155432)
Karen E Frey, Clark University, Graduate School of Geography, Worcester, MA, United States and Bonnie Light, University of Washington, Seattle, WA, United States
 
The Evolution of Dissolved Oxygen in the Beaufort Gyre Pacific Summer Water as it relates to Warming and Biological Signals (1171818)
Ashley Arroyo, Yale University, New Haven, CT, United States, Mary-Louise Timmermans, Yale University, Department of Geology and Geophysics, New Haven, United States, Isabela Le Bras, Woods Hole Oceanographic Institution, Woods Hole, United States, Andrey Proshutinsky, Woods Hole Oceanographic Institution, Woods Hole, MA, United States, William Williams, Department of Fisheries and Oceans Canada, Institute of Ocean Sciences, Canada, BC, Canada and Sarah Zimmermann, Fisheries and Oceans Canada, Institute of Ocean Sciences, Sidney, BC, Canada
 
Quantifying and Predicting the Light Environment Beneath Bare and Ponded Arctic Sea Ice (Invited) (1196582)
Bonnie Light, University of Washington, Seattle, WA, United States, Karen E Frey, Clark University, Graduate School of Geography, Worcester, MA, United States, Madison Smith, University of Washington, Seattle, United States and Donald K Perovich, Dartmouth College, Hanover, NH, United States
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