Interannual changes in the Bering Strait fluxes of volume, heat and freshwater between 1991 and 2004

Details Interannual changes in the Bering Strait fluxes of volume, heat and freshwater between 1991 and 2004 Interannual changes in the Bering Strait fluxes of volume, heat and freshwater between 1991 and 2004

Aug 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006georl..3315609w&link_type=abstract

Geophysical Research Letters, Volume 33, Issue 15, CiteID L15609

Physics

40

Oceanography: General: Arctic And Antarctic Oceanography (9310, 9315), Oceanography: General: Climate And Interannual Variability (1616, 1635, 3305, 3309, 4513), Oceanography: General: Descriptive And Regional Oceanography, Oceanography: General: Diurnal, Seasonal, And Annual Cycles (0438)

Scientific paper

Year-round moorings (1990 to 2004) illustrate interannual variability of Bering Strait volume, freshwater and heat fluxes, which affect Arctic systems including sea-ice. Fluxes are lowest in 2001 and increase to 2004. Whilst 2004 freshwater and volume fluxes match previous maxima (1998), the 2004 heat flux is the highest recorded, partly due to ~0.5°C warmer temperatures since 2002. The Alaskan Coastal Current, contributing about 1/3rd of the heat and $1\!/\!_{4 of the freshwater fluxes, also shows strong warming and freshening between 2002 and 2004. The increased Bering Strait heat input between 2001 and 2004 (>2×1020 J) could melt 640,000 km2 of 1 m thick ice; the 3-year freshwater increase (~800 km3) is about $1\!/\!_{4 of annual Arctic river run-off. Weaker southward winds likely explain the increased volume flux (~0.7 to ~1 Sv), causing ~80% of the freshwater and ~50% of the heat flux increases.

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