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A global, open‐ocean model of carbonyl sulfide and its air‐sea flux
Author(s) -
Preiswerk Dominic,
Najjar Raymond G.
Publication year - 2000
Publication title -
global biogeochemical cycles
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.512
H-Index - 187
eISSN - 1944-9224
pISSN - 0886-6236
DOI - 10.1029/1999gb001210
Subject(s) - colored dissolved organic matter , carbonyl sulfide , environmental science , sink (geography) , atmospheric sciences , flux (metallurgy) , dimethyl sulfide , oceanography , latitude , seawater , climatology , geology , nutrient , chemistry , phytoplankton , sulfur , cartography , organic chemistry , geodesy , geography
A global, open‐ocean, climatological model of marine carbonyl sulfide (OCS) with diurnal, seasonal, vertical and latitudinal resolution is presented and analyzed. The model includes the processes of photchemical production, air‐sea gas exchange, vertical turbulent mixing, and hydrolysis. In accordance with observations, the model predicts the highest surface OCS concentrations during the summer in high latitudes. The model with the best guess set of parameters predicts the open ocean to be a sink of OCS (2.3 Gmol yr −1 ) but severely underpredicts surface OCS concentrations in most locations. When a simple temperature‐dependent dark production parameterization is included, the ocean becomes a source of OCS (2.1 Gmol yr −1 ). In addition to dark production, the model is most sensitive to the surface concentration of colored dissolved organic matter (CDOM) and the spectral slope of CDOM absorption.