Delayed baroclinic response of the Antarctic circumpolar current to surface wind stress
Huang, Rui Xin
Wang, Dong Xiao
MetadataShow full item record
KeywordAntarctic Circumpolar Current (ACC); Zonal windstress; Baroclinic instability; Mesoscale eddy
Antarctic Circumpolar Current (ACC) responds to the surface windstress via two processes, i.e., instant barotropic process and delayed baroclinic process. This study focuses on the baroclinic instability mechanism in ACC. That is, the strengthening of surface zonal windstress causes the enhanced tilting of the isopycnal surface, which leads to the intense baroclinic instability. Simultaneously, the mesoscale eddies resulting from the baroclinic instability facilitate the transformation of mean potential energy to eddy energy, which causes the remarkable decrease of the ACC volume transport with the 2-year lag time. This delayed negative correlation between the ACC transport and the zonal windstress may account for the steadiness of the ACC transport in these two decades.
Author Posting. © Science in China Press, 2008. This is the author's version of the work. It is posted here by permission of Springer for personal use, not for redistribution. The definitive version was published in Science in China Series D: Earth Sciences 51 (2008): 1036-1043, doi:10.1007/s11430-008-0074-8.
Showing items related by title, author, creator and subject.
Dynamics of the Antarctic circumpolar current : evidence for topographic effects from altimeter data and numerical model output Gille, Sarah T. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 1995-02)Geosat altimeter data and numerical model output are used to examine the circulation and dynamics of the Antarctic Circumpolar Current (ACC). The mean sea surface height across the ACC has been reconstructed from height ...
Ledwell, James R.; St. Laurent, Louis C.; Girton, James B.; Toole, John M. (American Meteorological Society, 2011-01)The vertical dispersion of a tracer released on a density surface near 1500-m depth in the Antarctic Circumpolar Current west of Drake Passage indicates that the diapycnal diffusivity, averaged over 1 yr and over tens of ...
Sloyan, Bernadette M. (American Geophysical Union, 2006-02-15)Net northward transport below γn > 28.1 kgm−3 (≈3200 m) into the Perth Basin of between 4.4 and 5.8 Sv is estimated from a year-long current meter mooring array between the Broken and Naturaliste Plateaus. Northward ...