in Geophysical Research Letters, January 2010
Citation: Woodgate, R. A., T. Weingartner, and R. Lindsay (2010), The 2007 Bering Strait oceanic heat flux and anomalous Arctic sea-ice retreat,
Geophys. Res. Lett., 37, L01602, doi:10.1029/2009GL041621.
Paper (downloadable as pdf)
Please contact Rebecca Woodgate (email@example.com) for use of any of this materialAbstract
Polar Science Center, University of Washington, 2009
Figure 1: (a)
(b) Chukchi Sea AMSR-E sea-ice concentration, with schematic topography. White arrows mark the three main water pathways via HV,
(a) Volume transport, from A3 data alone – grey, hourly; blue, 30-day smoothed.
(b) Annual mean (AM) transports (not including the Alaskan Coastal Current (ACC), ~ 0.1 Sv) – blue, total from A3; dashed cyan, total from A2; solid cyan, eastern channel transport only from A2.
(c) Temperatures – blue, 30-day smoothed A3 near-bottom; red, 7-day average AVHRR-SST.
(d) AM temperature– blue, A3 near-bottom; cyan, A2 near-bottom; red, SST near A3.
(e) AM heat fluxes – cyan, from A2 for eastern channel only; blue, total from A3 data only; red area, total including ACC correction (~ 1x1020J/yr) and a 10m (lower bound) or 20m (upper bound) surface layer. Black crosses, amount of heat added by a 20m surface layer.
(f) Transport attributable to AM NCEP wind (heading 330º, i.e., ~ northwestward) - black, average over 4 nearest points (marked on Figure 1a) i.e., blue and red, ~150km north of the strait (67.5ºN,170ºW and 167.5ºW); yellow and cyan, ~ 100km south of the strait (65ºN, 170ºW and 167.5ºW).
(g) Transport attributable to the pressure-head term from annual fits – green, weekly data; black, annual mean.
Figure 3: For extreme heat flux years (rows – lows: 2001, 2005; highs: 2004, 2007), 30-day smoothed A3-transports (left column), temperatures (middle column) and heat flux (right column), compared to the entire data set from 1991-2007 (grey). Last row: Cumulative sums of the above, colors indicating year as per upper panels.
© Polar Science Center, University of Washington, 2009
We gratefully acknowledge financial support for this work from the National Science Foundation (ARC-0632154 and ARC-053026) with shiptime from NOAA-RUSALCA.
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