DMS role in ENSO cycle in the tropics
Journal Article
·
· Journal of Geophysical Research: Atmospheres
- Univ. of California, San Diego, La Jolla, CA (United States); Univ. of California, Irvine, CA (United States)
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
- Univ. of California, San Diego, La Jolla, CA (United States)
- Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
- Univ. of California, San Diego, La Jolla, CA (United States); Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
We examined the multiyear mean and variability of dimethyl sulfide (DMS) and its relationship to sulfate aerosols, as well as cloud microphysical and radiative properties. We conducted a 150 year simulation using preindustrial conditions produced by the Community Earth System Model embedded with a dynamic DMS module. The model simulated the mean spatial distribution of DMS emissions and burden, as well as sulfur budgets associated with DMS, SO2, H2SO4, and sulfate that were generally similar to available observations and inventories for a variety of regions. Changes in simulated sea-to-air DMS emissions and associated atmospheric abundance, along with associated aerosols and cloud and radiative properties, were consistently dominated by El Niño–Southern Oscillation (ENSO) cycle in the tropical Pacific region. Simulated DMS, aerosols, and clouds showed a weak positive feedback on sea surface temperature. This feedback suggests a link among DMS, aerosols, clouds, and climate on interannual timescales. The variability of DMS emissions associated with ENSO was primarily caused by a higher variation in wind speed during La Niña events. As a result, the simulation results also suggest that variations in DMS emissions increase the frequency of La Niña events but do not alter ENSO variability in terms of the standard deviation of the Niño 3 sea surface temperature anomalies.
- Research Organization:
- Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States). Oak Ridge Leadership Computing Facility (OLCF); Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)
- Sponsoring Organization:
- NSF; Battelle Memorial Institute; USDOE, ACME; USDOE Office of Science (SC), Biological and Environmental Research (BER) (SC-23); USDOE Office of Science (SC), Advanced Scientific Computing Research (ASCR) (SC-21); National Science Foundation
- Grant/Contract Number:
- AC05-76RL01830; SC0006679; AC52-07NA27344; AC05-00OR22725; AC02-05CH11231
- OSTI ID:
- 1343183
- Alternate ID(s):
- OSTI ID: 1402244
- Report Number(s):
- PNNL-SA--123189; KP1703020
- Journal Information:
- Journal of Geophysical Research: Atmospheres, Journal Name: Journal of Geophysical Research: Atmospheres Journal Issue: 22 Vol. 121; ISSN 2169-897X
- Publisher:
- American Geophysical UnionCopyright Statement
- Country of Publication:
- United States
- Language:
- English
An ENSO-induced aerosol dipole in the west-central Pacific and its potential feedback to ENSO evolution
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journal | September 2018 |
Climate Feedback on Aerosol Emission and Atmospheric Concentrations
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journal | January 2018 |
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