Get 20M+ Full-Text Papers For Less Than $1.50/day. Start a 14-Day Trial for You or Your Team.

Learn More →

A Thermohaline Inverse Method for Estimating Diathermohaline Circulation and Mixing

A Thermohaline Inverse Method for Estimating Diathermohaline Circulation and Mixing The thermohaline inverse method (THIM) is presented that provides estimates of the diathermohaline streamfunction , the downgradient along-isopycnal diffusion coefficient K , and the isotropic downgradient turbulent diffusion coefficient D of small-scale mixing processes. This is accomplished by using the water mass transformation framework in two tracer dimensions: here in Absolute Salinity S A and Conservative Temperature Θ coordinates. The authors show that a diathermal volume transport down a Conservative Temperature gradient is related to surface heating and cooling and mixing, and a diahaline volume transport down an Absolute Salinity gradient is related to surface freshwater fluxes and mixing. Both the diahaline and diathermal flows can be calculated using readily observed parameters that are used to produce climatologies, surface flux products, and mixing parameterizations for K and D . Conservation statements for volume, salt, and heat in ( S A , Θ) coordinates, using the diahaline and diathermal volume transport expressed as surface freshwater and heat fluxes and mixing, allow for the formulation of a system of equations that is solved by an inverse method that can estimate the unknown diathermohaline streamfunction and the diffusion coefficients K and D . The inverse solution provides an accurate estimate of , K , and D when tested against a numerical climate model for which all these parameters are known. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Journal of Physical Oceanography American Meteorological Society

A Thermohaline Inverse Method for Estimating Diathermohaline Circulation and Mixing

Download PDF
17 pages

Loading next page...
 
/lp/american-meteorological-society/a-thermohaline-inverse-method-for-estimating-diathermohaline-gjTGOnPuFG

References (49)

Publisher
American Meteorological Society
Copyright
Copyright © 2014 American Meteorological Society
ISSN
0022-3670
eISSN
1520-0485
DOI
10.1175/JPO-D-14-0039.1
Publisher site
See Article on Publisher Site

Abstract

The thermohaline inverse method (THIM) is presented that provides estimates of the diathermohaline streamfunction , the downgradient along-isopycnal diffusion coefficient K , and the isotropic downgradient turbulent diffusion coefficient D of small-scale mixing processes. This is accomplished by using the water mass transformation framework in two tracer dimensions: here in Absolute Salinity S A and Conservative Temperature Θ coordinates. The authors show that a diathermal volume transport down a Conservative Temperature gradient is related to surface heating and cooling and mixing, and a diahaline volume transport down an Absolute Salinity gradient is related to surface freshwater fluxes and mixing. Both the diahaline and diathermal flows can be calculated using readily observed parameters that are used to produce climatologies, surface flux products, and mixing parameterizations for K and D . Conservation statements for volume, salt, and heat in ( S A , Θ) coordinates, using the diahaline and diathermal volume transport expressed as surface freshwater and heat fluxes and mixing, allow for the formulation of a system of equations that is solved by an inverse method that can estimate the unknown diathermohaline streamfunction and the diffusion coefficients K and D . The inverse solution provides an accurate estimate of , K , and D when tested against a numerical climate model for which all these parameters are known.

Journal

Journal of Physical Oceanography – American Meteorological Society

Published: Feb 17, 2014

There are no references for this article.