A global, Open-Ocean model of carbonyl sulfide and its air-Sea flux

Dominic Preiswerk, Raymond Gabriel Najjar, Jr.

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Abstract

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.

Original languageEnglish (US)
Pages (from-to)585-598
Number of pages14
JournalGlobal Biogeochemical Cycles
Volume14
Issue number2
DOIs
Publication statusPublished - Jun 1 2000

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All Science Journal Classification (ASJC) codes

  • Global and Planetary Change
  • Environmental Chemistry
  • Environmental Science(all)
  • Atmospheric Science

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