Bottom pressure changes around Antarctica and wind-driven meridional flows

Details Bottom pressure changes around Antarctica and wind-driven meridional flows Bottom pressure changes around Antarctica and wind-driven meridional flows

Jul 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009georl..3613604p&link_type=abstract

Geophysical Research Letters, Volume 36, Issue 13, CiteID L13604

Physics

3

Oceanography: Physical: General Circulation (1218, 1222), Geodesy And Gravity: Time Variable Gravity (7223, 7230), Oceanography: Physical: Sea Level: Variations And Mean (1222, 1225, 1641), Oceanography: General: Arctic And Antarctic Oceanography (9310, 9315), Geodesy And Gravity: Ocean Monitoring With Geodetic Techniques (1225, 1641, 3010, 4532, 4556, 4560, 6959)

Scientific paper

Spatially-averaged bottom pressure anomalies near Antarctica (south of 60°S) calculated from GRACE data are well correlated with those produced by the ECCO project using least-squares optimization methods to fit an ocean model to most available data. Both GRACE and ECCO results indicate mass exchange primarily between the Southern Ocean and the Pacific and the importance of zonal wind stress to this exchange. The ECCO flow fields show that the near-surface meridional Ekman transport, directly driven by the zonal wind stress, is nearly balanced by return flows below the shallowest topography at 60°S (˜1300 m at this Drake Passage latitude), with the return transport being slightly lagged in time relative to the Ekman transport. Such time lags, which may result from geostrophic adjustment at depth, cause the small associated net transport across 60°S to be ˜90° out of phase with the wind. This in turn can explain why zonal wind stress and bottom pressure anomalies around Antarctica tend to be anticorrelated in both GRACE and ECCO results.

Affiliated with

Also associated with

No associations

Rating

Bottom pressure changes around Antarctica and wind-driven meridional flows does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Bottom pressure changes around Antarctica and wind-driven meridional flows, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Bottom pressure changes around Antarctica and wind-driven meridional flows will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1785240