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contributor authorZhang, Rong-Hua
contributor authorKleeman, Richard
contributor authorZebiak, Stephen E.
contributor authorKeenlyside, Noel
contributor authorRaynaud, Stephane
date accessioned2017-06-09T17:00:18Z
date available2017-06-09T17:00:18Z
date copyright2005/01/01
date issued2005
identifier issn0894-8755
identifier otherams-77752.pdf
identifier urihttp://onlinelibrary.yabesh.ir/handle/yetl/4220345
description abstractAn empirical model for the temperature of subsurface water entrained into the ocean mixed layer (Te) is presented and evaluated to improve sea surface temperature anomaly (SSTA) simulations in an intermediate ocean model (IOM) of the tropical Pacific. An inverse modeling approach is adopted to estimate Te from an SSTA equation using observed SST and simulated upper-ocean currents. A relationship between Te and sea surface height (SSH) anomalies is then obtained by utilizing a singular value decomposition (SVD) of their covariance. This empirical scheme is able to better parameterize Te anomalies than other local schemes and quite realistically depicts interannual variability of Te, including a nonlocal phase lag relation of Te variations relative to SSH anomalies over the central equatorial Pacific. An improved Te parameterization naturally leads to better depiction of the subsurface effect on SST variability by the mean upwelling of subsurface temperature anomalies. As a result, SSTA simulations are significantly improved in the equatorial Pacific; a comparison with other schemes indicates that systematic errors of the simulated SSTAs are significantly small?apparently due to the optimized empirical Teparameterization. Cross validation and comparisons with other model simulations are made to illustrate the robustness and effectiveness of the scheme. In particular it is demonstrated that the empirical Te model constructed from one historical period can be successfully used to improve SSTA simulations in another.
publisherAmerican Meteorological Society
titleAn Empirical Parameterization of Subsurface Entrainment Temperature for Improved SST Anomaly Simulations in an Intermediate Ocean Model
typeJournal Paper
journal volume18
journal issue2
journal titleJournal of Climate
identifier doi10.1175/JCLI-3271.1
journal fristpage350
journal lastpage371
treeJournal of Climate:;2005:;volume( 018 ):;issue: 002
contenttypeFulltext


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