Physics
Scientific paper
Jan 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011georl..3802501k&link_type=abstract
Geophysical Research Letters, Volume 38, Issue 2, CiteID L02501
Physics
3
Oceanography: General: Arctic And Antarctic Oceanography (9310, 9315), Cryosphere: Sea Ice (4540)
Scientific paper
We construct the dynamic ocean topography (DOT) of the Arctic Ocean, for five ICESat campaigns (winter of 2004-2008), using sea surface height estimates in open leads. Results show that the mean winter DOT over the Arctic Ocean varies by ˜1 m and features a distinct dome of ˜40 cm over the Beaufort Sea. Standard deviation of the mean field is ˜20 cm. Spatial coherence between the five winter DOTs is consistently high (>0.9), whereas the coherence between the DOTs and the winter (DJFM) sea-level pressure fields over the Arctic Basin is variable. This suggests persistence of the underlying hydrodynamic processes at interannual time-scales compared to seasonal atmospheric forcing. Comparison of dynamic heights (DH) from hydrographic surveys and the DOT in 2008 shows a remarkable correlation of 0.92. The geostrophic velocity fields computed from the DOT and interpolated DH fields highlight the smaller scale oceanographic features in the satellite estimates.
Kwok Ron
Morison James
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