Wintertime observations of Subtropical Mode Water formation within the Gulf Stream
Figure S1: Upstream and downstream structure of the Gulf Stream in the winter of 2007 when the CLIMODE data were collected. (2.046Mb)
Figure S3: Structure of the % oxygen saturation, fluorescence, potential density, and absolute momentum. (1.310Mb)
Joyce, Terrence M.
Thomas, Leif N.
Bahr, Frank B.
MetadataShow full item record
We study the structure of Subtropical Mode Water (STMW) within the eastward-flowing Gulf Stream as it forms during strong winter cooling. Shipboard observations using SeaSoar and ADCP reveal that while active mixing by gravitational instabilities is common, large vertical and lateral shears of the Gulf Stream play a central role in determination of the modes of active mixing. Evidence is presented that low static stability and large vertical shear can combine to cause slantwise convection/symmetric instabilities, while the large anticyclonic shears to the south of the Gulf Stream core can cause low absolute vorticity and precondition the Ertel potential vorticity to be small and more susceptible to instabilities. The area of active mixing driven by surface forcing in the presences of shear occupies a swath 50–90 km wide immediately south of the Gulf Stream core at the northern edge of the Sargasso Sea.
Author Posting. © American Geophysical Union, 2009. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution. The definitive version was published in Geophysical Research Letters 36 (2009): L02607, doi:10.1029/2008GL035918.
Showing items related by title, author, creator and subject.
Holte, James W.; Talley, Lynne D.; Chereskin, Teresa K.; Sloyan, Bernadette M. (American Geophysical Union, 2012-03-29)Two hydrographic surveys and a one-dimensional mixed layer model are used to assess the role of air-sea fluxes in forming deep Subantarctic Mode Water (SAMW) mixed layers in the southeast Pacific Ocean. Forty-two SAMW mixed ...
Microbial diversity and methanogenic activity of Antrim Shale formation waters from recently fractured wells Wuchter, Cornelia; Banning, Erin C.; Mincer, Tracy J.; Drenzek, Nicholas J.; Coolen, Marco J. L. (Frontiers Media, 2013-12-06)The Antrim Shale in the Michigan Basin is one of the most productive shale gas formations in the U.S., but optimal resource recovery strategies must rely on a thorough understanding of the complex biogeochemical, microbial, ...
Spall, Michael A. (John Wiley & Sons, 2013-05-17)Basic constraints on the dense water formation rate and circulation resulting from cooling around an island are discussed. The domain under consideration consists of an island surrounded by a shelf, a continental slope, ...