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Title: Effects of Ocean Ecosystem on Marine Aerosol-Cloud Interaction

Abstract

Using satellite data for the surface ocean, aerosol optical depth (AOD), and cloud microphysical parameters, we show that statistically significant positive correlations exist between ocean ecosystem productivity, the abundance of submicron aerosols, and cloud microphysical properties over different parts of the remote oceans. The correlation coefficient for remotely sensed surface chlorophyll a concentration ([Chl- a ]) and liquid cloud effective radii over productive areas of the oceans varies between 0.2 and 0.6 . Special attention is given to identifying (and addressing) problems from correlation analysis used in the previous studies that can lead to erroneous conclusions. A new approach (using the difference between retrieved AOD and predicted sea salt aerosol optical depth, AOD diff ) is developed to explore causal links between ocean physical and biological systems and the abundance of cloud condensation nuclei (CCN) in the remote marine atmosphere. We have found that over multiple time periods, 550 nm AOD diff (sensitive to accumulation mode aerosol, which is the prime contributor to CCN) correlates well with [Chl- a ] over the productive waters of the Southern Ocean. Since [Chl- a ] can be used as a proxy of ocean biological productivity, our analysis demonstrates the role of ocean ecology in contributing CCN, thus shaping the microphysical properties of low-level marine clouds.

Authors:
 [1];  [2]
  1. Department of Marine, Earth and Atmospheric Sciences, North Carolina State University, Raleigh, NC 27695, USA
  2. School of Earth and Atmospheric Sciences, Georgia Institute of Technology, Atlanta, GA 30332, USA, School of Chemical and Biomolecular Engineering, Georgia Institute of Technology, Atlanta, GA 30332, USA
Publication Date:
Sponsoring Org.:
USDOE
OSTI Identifier:
1198439
Grant/Contract Number:  
FG02-08ER64508
Resource Type:
Published Article
Journal Name:
Advances in Meteorology
Additional Journal Information:
Journal Name: Advances in Meteorology Journal Volume: 2010; Journal ID: ISSN 1687-9309
Publisher:
Hindawi Publishing Corporation
Country of Publication:
Egypt
Language:
English

Citation Formats

Meskhidze, Nicholas, and Nenes, Athanasios. Effects of Ocean Ecosystem on Marine Aerosol-Cloud Interaction. Egypt: N. p., 2010. Web. doi:10.1155/2010/239808.
Meskhidze, Nicholas, & Nenes, Athanasios. Effects of Ocean Ecosystem on Marine Aerosol-Cloud Interaction. Egypt. doi:10.1155/2010/239808.
Meskhidze, Nicholas, and Nenes, Athanasios. Fri . "Effects of Ocean Ecosystem on Marine Aerosol-Cloud Interaction". Egypt. doi:10.1155/2010/239808.
@article{osti_1198439,
title = {Effects of Ocean Ecosystem on Marine Aerosol-Cloud Interaction},
author = {Meskhidze, Nicholas and Nenes, Athanasios},
abstractNote = {Using satellite data for the surface ocean, aerosol optical depth (AOD), and cloud microphysical parameters, we show that statistically significant positive correlations exist between ocean ecosystem productivity, the abundance of submicron aerosols, and cloud microphysical properties over different parts of the remote oceans. The correlation coefficient for remotely sensed surface chlorophyll a concentration ([Chl- a ]) and liquid cloud effective radii over productive areas of the oceans varies between − 0.2 and − 0.6 . Special attention is given to identifying (and addressing) problems from correlation analysis used in the previous studies that can lead to erroneous conclusions. A new approach (using the difference between retrieved AOD and predicted sea salt aerosol optical depth, AOD diff ) is developed to explore causal links between ocean physical and biological systems and the abundance of cloud condensation nuclei (CCN) in the remote marine atmosphere. We have found that over multiple time periods, 550 nm AOD diff (sensitive to accumulation mode aerosol, which is the prime contributor to CCN) correlates well with [Chl- a ] over the productive waters of the Southern Ocean. Since [Chl- a ] can be used as a proxy of ocean biological productivity, our analysis demonstrates the role of ocean ecology in contributing CCN, thus shaping the microphysical properties of low-level marine clouds.},
doi = {10.1155/2010/239808},
journal = {Advances in Meteorology},
number = ,
volume = 2010,
place = {Egypt},
year = {2010},
month = {1}
}

Journal Article:
Free Publicly Available Full Text
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DOI: 10.1155/2010/239808

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Cited by: 9 works
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