The Bering Sea in 2008 A decoupling of

The Bering Sea in 2008: A decoupling of sea-ice extent between the Arctic and Bering Sea P. J. Stabeno 1, J. E. Overland 1 and J. M. Napp 2 1 2 Pacific Marine Environmental Laboratory, Seattle, WA Alaska Fishery Science Center, Seattle, WA Support from NOAA/NPCREP, NPRB andand NSF

The Bering Sea in 2008 COLD Depth Averaged Temperature (M 2) Depth Averaged Temperature Anomaly (M 2)

Arctic Ocean Sea ice extent in Arctic Ocean Overland et al. Minimum Sea Ice extent, September 2007

Bering Sea: Sea ice extent in 2008 and winds near Bering Strait Wind Velocity (m s-1) Bering Strait Stabeno and Overland. The Arctic must freeze before the Bering.

Model Predictions Sea ice extent Stabeno and Overland

North-south transition The 70 -m isobath 2005 - Warm 2008 - Cold M 5 Temperature, Sept. 2008 Salinity, Sept. 2008 Stabeno et al.

Chlorophyll estimated from fluorescence 1% light level May 2008 Mixed layer May July September North 70 -m isobath South

Vertical Mixing over the Middle Shelf Wind mixing Thermocline 1% light level Tidal mixing Northern shelf Southern shelf

Ammonium along the 70 -m Isobath Nutrients ammonium Ammonium - Sept. 2008 Stabeno et al.

Whales on the Middle Shelf Zooplankton Right whales trajectory Fin whales M 2 Passive Acoustics M 4 May Jun Jul Aug 2006 Sep Oct Nov Dec Jan Feb Mar 2007 Right whales Passive Acoustics Courtesy of K. Stafford May Jun Jul Aug 2006 Sep Oct Nov Dec Jan Feb 2007 Mar 2006 Apr Biovolume (mm 3 m-3) Courtesy of A. Zerbini Biovolume (mm 3 m-3) Moored Acoustics - M 2 May Jun Jul Aug Sep 2007 Apr May Napp et al.

Will 2009 be cold, with late retreat of sea ice?

Questions