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Title: Interannual to decadal climate variability of sea salt aerosols in the coupled climate model CESM1.0: Climate variability of sea salt aerosols

Abstract

This study examines multi-year climate variability associated with sea salt aerosols and their contribution to the variability of shortwave cloud forcing (SWCF) using a 150-year simulation for pre-industrial conditions of the Community Earth System Model version 1.0 (CESM1). The results suggest that changes in sea salt and related cloud and radiative properties on interannual timescales are dominated by the ENSO cycle. Sea salt variability on longer (interdecadal) timescales is associated with low-frequency Pacific ocean variability similar to the interdecadal Pacific Oscillation (IPO), but does not show a statistically significant spectral peak. A multivariate regression suggests that sea salt aerosol variability may contribute to SWCF variability in the tropical Pacific, explaining up to 25-35% of the variance in that region. Elsewhere, there is only a small aerosol influence on SWCF through modifying cloud droplet number and liquid water path that contributes to the change of cloud effective radius and cloud optical depth (and hence cloud albedo), producing a multi-year aerosol-cloud-wind interaction.

Authors:
 [1];  [1];  [1];  [1];  [1];  [2]; ORCiD logo [3];  [3]; ORCiD logo [3];  [3]
  1. Scripps Institution of Oceanography, University of California, San Diego, La Jolla California USA
  2. Scripps Institution of Oceanography, University of California, San Diego, La Jolla California USA; Northwest Research Associates, Redmond Washington USA
  3. Atmospheric Science and Global Change Division, Pacific Northwest National Laboratory, Richland Washington USA
Publication Date:
Research Org.:
Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1358526
Report Number(s):
PNNL-SA-106628
Journal ID: ISSN 2169-897X; KP1703010
DOE Contract Number:
AC05-76RL01830
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Geophysical Research: Atmospheres; Journal Volume: 120; Journal Issue: 4
Country of Publication:
United States
Language:
English

Citation Formats

Xu, Li, Pierce, David W., Russell, Lynn M., Miller, Arthur J., Somerville, Richard C. J., Twohy, Cynthia H., Ghan, Steven J., Singh, Balwinder, Yoon, Jin-Ho, and Rasch, Philip J. Interannual to decadal climate variability of sea salt aerosols in the coupled climate model CESM1.0: Climate variability of sea salt aerosols. United States: N. p., 2015. Web. doi:10.1002/2014JD022888.
Xu, Li, Pierce, David W., Russell, Lynn M., Miller, Arthur J., Somerville, Richard C. J., Twohy, Cynthia H., Ghan, Steven J., Singh, Balwinder, Yoon, Jin-Ho, & Rasch, Philip J. Interannual to decadal climate variability of sea salt aerosols in the coupled climate model CESM1.0: Climate variability of sea salt aerosols. United States. doi:10.1002/2014JD022888.
Xu, Li, Pierce, David W., Russell, Lynn M., Miller, Arthur J., Somerville, Richard C. J., Twohy, Cynthia H., Ghan, Steven J., Singh, Balwinder, Yoon, Jin-Ho, and Rasch, Philip J. Sat . "Interannual to decadal climate variability of sea salt aerosols in the coupled climate model CESM1.0: Climate variability of sea salt aerosols". United States. doi:10.1002/2014JD022888.
@article{osti_1358526,
title = {Interannual to decadal climate variability of sea salt aerosols in the coupled climate model CESM1.0: Climate variability of sea salt aerosols},
author = {Xu, Li and Pierce, David W. and Russell, Lynn M. and Miller, Arthur J. and Somerville, Richard C. J. and Twohy, Cynthia H. and Ghan, Steven J. and Singh, Balwinder and Yoon, Jin-Ho and Rasch, Philip J.},
abstractNote = {This study examines multi-year climate variability associated with sea salt aerosols and their contribution to the variability of shortwave cloud forcing (SWCF) using a 150-year simulation for pre-industrial conditions of the Community Earth System Model version 1.0 (CESM1). The results suggest that changes in sea salt and related cloud and radiative properties on interannual timescales are dominated by the ENSO cycle. Sea salt variability on longer (interdecadal) timescales is associated with low-frequency Pacific ocean variability similar to the interdecadal Pacific Oscillation (IPO), but does not show a statistically significant spectral peak. A multivariate regression suggests that sea salt aerosol variability may contribute to SWCF variability in the tropical Pacific, explaining up to 25-35% of the variance in that region. Elsewhere, there is only a small aerosol influence on SWCF through modifying cloud droplet number and liquid water path that contributes to the change of cloud effective radius and cloud optical depth (and hence cloud albedo), producing a multi-year aerosol-cloud-wind interaction.},
doi = {10.1002/2014JD022888},
journal = {Journal of Geophysical Research: Atmospheres},
number = 4,
volume = 120,
place = {United States},
year = {Sat Feb 21 00:00:00 EST 2015},
month = {Sat Feb 21 00:00:00 EST 2015}
}