Penetration of the 1990s warm temperature anomaly of Atlantic Water in the Canada Basin

Details Penetration of the 1990s warm temperature anomaly of Atlantic Water in the Canada Basin Penetration of the 1990s warm temperature anomaly of Atlantic Water in the Canada Basin

Oct 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004georl..3120301s&link_type=abstract

Geophysical Research Letters, Volume 31, Issue 20, CiteID L20301

Physics

15

Oceanography: Physical: General Circulation, Oceanography: Physical: Hydrography, Oceanography: Physical: Currents

Scientific paper

Penetration of the 1990s warm temperature anomaly (WTA) of the Fram Strait branch of Atlantic Water (FSBW) in the Canada Basin is described using available temperature, salinity, and velocity data. The core temperatures of FSBW show distinct pathways. Over the Chukchi Borderland advective velocities of the FSBW are well-correlated with bottom topography. The resulting multifarious pathways over the Chukchi Borderland act to modulate and substantially increase the time scale of WTA spreading and advancement. Further downstream two WTA tongues are observed. One tongue followed the Beaufort Slope and, along this pathway, the core temperatures of FSBW decreased rapidly. The depth integrated value of heat content remained near constant however, suggesting enhanced vertical mixing. The second tongue debouched from the northern tip of the Northwind Ridge and spread eastward into the deep Canada Basin, suggesting a complex recirculation structure within the Beaufort Gyre.

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