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Title: Influence of wind speed averaging on estimates of dimethylsulfide emission fluxes

Journal Article · · Journal of Geophysical Research
DOI:https://doi.org/10.1029/2001JD001564· OSTI ID:15003526
 [1];  [1];  [1];  [1];  [1]
  1. Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)
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The effect of various wind-speed-averaging periods on calculated DMS emission fluxes is quantitatively assessed. Here, a global climate model and an emission flux module were run in stand-alone mode for a full year. Twenty-minute instantaneous surface wind speeds and related variables generated by the climate model were archived, and corresponding 1-hour-, 6-hour-, daily-, and monthly-averaged quantities calculated. These various time-averaged, model-derived quantities were used as inputs in the emission flux module, and DMS emissions were calculated using two expressions for the mass transfer velocity commonly used in atmospheric models. Results indicate that the time period selected for averaging wind speeds can affect the magnitude of calculated DMS emission fluxes. A number of individual marine cells within the global grid show DMS emissions fluxes that are 10-60% higher when emissions are calculated using 20-minute instantaneous model time step winds rather than monthly-averaged wind speeds, and at some locations the differences exceed 200%. Many of these cells are located in the southern hemisphere where anthropogenic sulfur emissions are low and changes in oceanic DMS emissions may significantly affect calculated aerosol concentrations and aerosol radiative forcing.

Research Organization:
Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
Sponsoring Organization:
USDOE
Grant/Contract Number:
AC06-76RL01830
OSTI ID:
15003526
Report Number(s):
PNWD-SA-5594
Journal Information:
Journal of Geophysical Research, Vol. 107, Issue D23; ISSN 0148-0227
Publisher:
American Geophysical UnionCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 13 works
Citation information provided by
Web of Science

References (24)

Global concentrations of tropospheric sulfate, nitrate, and ammonium aerosol simulated in a general circulation model journal June 1999
The influence of short-term wind variability on air-sea CO 2 exchange journal September 2001
Contribution of hurricanes to local and global estimates of air–sea exchange of CO2 journal September 1998
Regional and seasonal variations in the flux of oceanic dimethylsulfide to the atmosphere journal January 1987
Sulfur emissions to the atmosphere from natural sourees journal April 1992
General circulation model assessment of the sensitivity of direct climate forcing by anthropogenic sulfate aerosols to aerosol size and chemistry journal January 1995
An assessment of the radiative effects of anthropogenic sulfate journal February 1997
Gas transfer to and across an air-water interface journal January 1977
A physically based estimate of radiative forcing by anthropogenic sulfate aerosol journal March 2001
Evaluation of aerosol direct radiative forcing in MIRAGE journal March 2001
Indirect sulphate aerosol forcing in a climate model with an interactive sulphur cycle journal September 2001
Flux of dimethylsulfide from the oceans: A comparison of updated data sets and flux models journal November 2000
A global database of sea surface dimethylsulfide (DMS) measurements and a procedure to predict sea surface DMS as a function of latitude, longitude, and month journal June 1999
The National Center for Atmospheric Research Community Climate Model: CCM3* journal June 1998
Tropospheric sulfur simulation and sulfate direct radiative forcing in the Goddard Institute for Space Studies general circulation model journal October 1999
A global three-dimensional model of the tropospheric sulfur cycle journal October 1991
Tropospheric sulfur cycle in the Canadian general circulation model journal November 1999
Direct covariance air-sea CO 2 fluxes journal August 2001
In situ evaluation of air-sea gas exchange parameterizations using novel conservative and volatile tracers journal March 2000
Representations of transport, convection, and the hydrologic cycle in chemical transport models: Implications for the modeling of short-lived and soluble species journal December 1997
A comparison of scavenging and deposition processes in global models: results from the WCRP Cambridge Workshop of 1995 journal September 2000
Experimental determination of the diffusion coefficient of dimethylsulfide in water journal January 1993
Relationship between wind speed and gas exchange over the ocean journal January 1992
A cubic relationship between air-sea CO 2 exchange and wind speed journal July 1999

Cited By (3)

Impact of continental meteorology and atmospheric circulation in the modulation of Aerosol Optical Depth over the Arabian Sea journal April 2012
Spatial distributions of volatile sulfur compounds in surface seawater and overlying atmosphere in the northwestern Pacific Ocean, eastern Indian Ocean, and Southern Ocean: IMPORTANCE OF DMS EMISSION IN MARGINAL ICE ZONES journal June 2006
Global sea-to-air flux climatology for bromoform, dibromomethane and methyl iodide journal January 2013

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54 ENVIRONMENTAL SCIENCES
dimethysulfide
air-sea gas exchange
surface fluxes
marine boundary layer
climate change
Monin-Obukhov similarity theory