On the relationship between ocean DMS and solar radiation

Gregory J. Derevianko, Curtis Deutsch, Alex Hall

Research output: Contribution to journalArticlepeer-review

23 Scopus citations

Abstract

Biologically produced dimethylsulfide (DMS) is an important source of sulfur to the marine atmosphere that may affect cloud formation and properties. DMS is involved in a complex set of biochemical transformations and ecological exchanges so its global distribution is influenced by numerous factors, including oxidative stress from UV radiation. We re-examine correlations between global surface DMS concentrations and mixed layer solar radiation dose (SRD), and find that SRD accounts for only a very small fraction (14%) of total variance in DMS measurements when using minimal aggregation methods. Moreover this relationship arises in part from the fact that when mixed layers deepen, both SRD and DMS decrease. When we control for this confounding effect, the correlation between DMS and SRD is reduced even further. These results indicate that factors other than solar irradiance play a leading role in determining global DMS emissions.

Original languageEnglish (US)
Article numberL17606
JournalGeophysical Research Letters
Volume36
Issue number17
DOIs
StatePublished - Sep 1 2009
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Geophysics
  • Earth and Planetary Sciences(all)

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