In:
Journal of Geophysical Research: Atmospheres, American Geophysical Union (AGU), Vol. 105, No. D21 ( 2000-11-16), p. 26369-26377
Abstract:
Continuous measurements of atmospheric dimethylsulfide (DMS) have been performed over a 10‐year period (1990–1999) at Amsterdam Island in the southern Indian Ocean. Atmospheric DMS ranges from 5 to 1930 parts per trillion by volume (pptv) and shows a clear seasonal variation with a factor of 20 in amplitude between its maximum in January (austral summer) and minimum in July‐August (austral winter). Important deviations from the 10‐year monthly mean as high as 100% have been detected, which could not be explained by changes in meteorology and/or oxidation capacity of the atmosphere. Comparison with a three dimensional (3‐D) chemistry/transport model revealed that changes in the source strength of DMS as high as a factor of 2 were required to account for such DMS interannual variations. In addition, DMS variability was found to be closely related to sea surface temperature anomalies, clearly indicating a link between DMS and climate changes.
Type of Medium:
Online Resource
ISSN:
0148-0227
DOI:
10.1029/2000JD900236
Language:
English
Publisher:
American Geophysical Union (AGU)
Publication Date:
2000
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