Heat and salt balances over the New England continental shelf, August 1996 to June 1997


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dc.contributor.author Lentz, Steven J.
dc.contributor.author Shearman, R. Kipp
dc.contributor.author Plueddemann, Albert J.
dc.date.accessioned 2010-08-24T15:43:52Z
dc.date.available 2011-01-29T09:23:04Z
dc.date.issued 2010-07-29
dc.identifier.citation Journal of Geophysical Research 115 (2010): C07017 en_US
dc.identifier.uri http://hdl.handle.net/1912/3857
dc.description Author Posting. © American Geophysical Union, 2010. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution. The definitive version was published in Journal of Geophysical Research 115 (2010): C07017, doi:10.1029/2009JC006073. en_US
dc.description.abstract Heat and salt balances over the New England shelf are examined using 10 month time series of currents, temperature, and salinity from a four element moored array and surface heat and freshwater fluxes from a meteorological buoy. A principal result is closure of the heat budget to 10 W m−2. The seasonal variation in depth-average temperature, from 14°C in September to 5°C in March, was primarily due to the seasonal variation in surface heat flux and a heat loss in winter caused by along-shelf advection of colder water from the northeast. Conductivity sensor drifts precluded closing the salt balance on time scales of months or longer. For time scales of days to weeks, depth-average temperature and salinity variability were primarily due to advection. Advective heat and salt flux divergences were strongest and most complex in winter, when there were large cross-shelf temperature and salinity gradients at the site due to the shelf-slope front that separates cooler, fresher shelf water from warmer, saltier slope water. Onshore flow of warm, salty slope water near the bottom and offshore flow of cooler, fresher shelf water due to persistent eastward (upwelling-favorable) winds caused a temperature increase of nearly 3°C and a salinity increase of 0.8 in winter. Along-shelf barotropic tidal currents caused a temperature decrease of 1.5°C and a salinity decrease of 0.7. Wave-driven Stokes drift caused a temperature increase of 0.5°C and a salinity increase of 0.4 from mid December to January when there were large waves and large near-surface cross-shelf temperature and salinity gradients. en_US
dc.description.sponsorship The field program was funded by the Office of Naval Research, Code 322, under grant N00014‐95‐1‐0339. Analysis was also partially supported by the National Science Foundation Physical Oceanography program under grants OCE‐0647050 and OCE‐0548961. en_US
dc.format.mimetype application/pdf
dc.language.iso en_US en_US
dc.publisher American Geophysical Union en_US
dc.relation.uri http://dx.doi.org/10.1029/2009JC006073
dc.subject Heat balance en_US
dc.subject Salt balance en_US
dc.subject Continental shelf en_US
dc.title Heat and salt balances over the New England continental shelf, August 1996 to June 1997 en_US
dc.type Article en_US
dc.identifier.doi 10.1029/2009JC006073

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