Derivation of component aerosol direct radiative forcing at the top of atmosphere for clear-sky oceans

Tom X.P. Zhao; Hongbin Yu; Istvan Laszlo; Mian Chin; William C. Conant

doi:10.1016/j.jqsrt.2007.10.006

Derivation of component aerosol direct radiative forcing at the top of atmosphere for clear-sky oceans

Tom X.P. Zhao
, Hongbin Yu
, Istvan Laszlo
, Mian Chin
, William C. Conant

Research output: Contribution to journal › Article › peer-review

26 Scopus citations

Abstract

A two-step approach is proposed to derive component aerosol direct radiative forcing (ADRF) at the top of atmosphere (TOA) over global oceans from 60°S to 60°N for clear-sky condition by combining Terra CERES/MODIS-SSF shortwave (SW) flux and aerosol optical thickness (AOT) observations with the fractions of component AOTs from the GSFC/GOCART model. The derived global annual mean component ADRF is +0.08±0.17 W/m² for black carbon, -0.52±0.24 W/m² for organic carbon, -1.10±0.42 W/m² for sulfate, -0.99±0.37 W/m² for dust, -2.44±0.84 W/m² for sea salt, and -4.98±1.67 W/m² for total aerosols. The total ADRF has also been partitioned into anthropogenic and natural components with a value of -1.25±0.43 and -3.73±1.27 W/m², respectively. The major sources of error in the estimates have also been discussed. The analysis adds an alternative technique to narrow the large difference between current model-based and observation-based global estimates of component ADRF by combining the satellite measurement with the model simulation.

Original language	English (US)
Pages (from-to)	1162-1186
Number of pages	25
Journal	Journal of Quantitative Spectroscopy and Radiative Transfer
Volume	109
Issue number	7
DOIs	https://doi.org/10.1016/j.jqsrt.2007.10.006
State	Published - May 2008
Externally published	Yes

Keywords

Aerosol direct radiative forcing
Aerosol optical thickness

ASJC Scopus subject areas

Radiation
Atomic and Molecular Physics, and Optics
Spectroscopy

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10.1016/j.jqsrt.2007.10.006

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@article{ed064b9273c34812b65ebc3b5454269d,

title = "Derivation of component aerosol direct radiative forcing at the top of atmosphere for clear-sky oceans",

abstract = "A two-step approach is proposed to derive component aerosol direct radiative forcing (ADRF) at the top of atmosphere (TOA) over global oceans from 60°S to 60°N for clear-sky condition by combining Terra CERES/MODIS-SSF shortwave (SW) flux and aerosol optical thickness (AOT) observations with the fractions of component AOTs from the GSFC/GOCART model. The derived global annual mean component ADRF is +0.08±0.17 W/m2 for black carbon, -0.52±0.24 W/m2 for organic carbon, -1.10±0.42 W/m2 for sulfate, -0.99±0.37 W/m2 for dust, -2.44±0.84 W/m2 for sea salt, and -4.98±1.67 W/m2 for total aerosols. The total ADRF has also been partitioned into anthropogenic and natural components with a value of -1.25±0.43 and -3.73±1.27 W/m2, respectively. The major sources of error in the estimates have also been discussed. The analysis adds an alternative technique to narrow the large difference between current model-based and observation-based global estimates of component ADRF by combining the satellite measurement with the model simulation.",

keywords = "Aerosol direct radiative forcing, Aerosol optical thickness",

author = "Zhao, \{Tom X.P.\} and Hongbin Yu and Istvan Laszlo and Mian Chin and Conant, \{William C.\}",

note = "Funding Information: We would like to acknowledge the NASA CERES project and the DAAC of the NASA Langley for providing the CERES/SSF data. We also thank Dr. Mi Zhou at the NOAA/NESDIS/STAR for providing her calculation for the COVE site of AERONET to compare with our result in the CLAMS case. Two reviewers{\textquoteright} comments are very helpful for the improvement of the manuscript. This research is funded by the NASA Radiation Program managed by Dr. Hal Maring through grant RSP-0022-0005 and the Cooperative Institute Program of NOAA/NESDIS/STAR.",

year = "2008",

month = may,

doi = "10.1016/j.jqsrt.2007.10.006",

language = "English (US)",

volume = "109",

pages = "1162--1186",

journal = "Journal of Quantitative Spectroscopy and Radiative Transfer",

issn = "0022-4073",

publisher = "Elsevier Limited",

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T1 - Derivation of component aerosol direct radiative forcing at the top of atmosphere for clear-sky oceans

AU - Zhao, Tom X.P.

AU - Yu, Hongbin

AU - Laszlo, Istvan

AU - Chin, Mian

AU - Conant, William C.

N1 - Funding Information: We would like to acknowledge the NASA CERES project and the DAAC of the NASA Langley for providing the CERES/SSF data. We also thank Dr. Mi Zhou at the NOAA/NESDIS/STAR for providing her calculation for the COVE site of AERONET to compare with our result in the CLAMS case. Two reviewers’ comments are very helpful for the improvement of the manuscript. This research is funded by the NASA Radiation Program managed by Dr. Hal Maring through grant RSP-0022-0005 and the Cooperative Institute Program of NOAA/NESDIS/STAR.

PY - 2008/5

Y1 - 2008/5

N2 - A two-step approach is proposed to derive component aerosol direct radiative forcing (ADRF) at the top of atmosphere (TOA) over global oceans from 60°S to 60°N for clear-sky condition by combining Terra CERES/MODIS-SSF shortwave (SW) flux and aerosol optical thickness (AOT) observations with the fractions of component AOTs from the GSFC/GOCART model. The derived global annual mean component ADRF is +0.08±0.17 W/m2 for black carbon, -0.52±0.24 W/m2 for organic carbon, -1.10±0.42 W/m2 for sulfate, -0.99±0.37 W/m2 for dust, -2.44±0.84 W/m2 for sea salt, and -4.98±1.67 W/m2 for total aerosols. The total ADRF has also been partitioned into anthropogenic and natural components with a value of -1.25±0.43 and -3.73±1.27 W/m2, respectively. The major sources of error in the estimates have also been discussed. The analysis adds an alternative technique to narrow the large difference between current model-based and observation-based global estimates of component ADRF by combining the satellite measurement with the model simulation.

AB - A two-step approach is proposed to derive component aerosol direct radiative forcing (ADRF) at the top of atmosphere (TOA) over global oceans from 60°S to 60°N for clear-sky condition by combining Terra CERES/MODIS-SSF shortwave (SW) flux and aerosol optical thickness (AOT) observations with the fractions of component AOTs from the GSFC/GOCART model. The derived global annual mean component ADRF is +0.08±0.17 W/m2 for black carbon, -0.52±0.24 W/m2 for organic carbon, -1.10±0.42 W/m2 for sulfate, -0.99±0.37 W/m2 for dust, -2.44±0.84 W/m2 for sea salt, and -4.98±1.67 W/m2 for total aerosols. The total ADRF has also been partitioned into anthropogenic and natural components with a value of -1.25±0.43 and -3.73±1.27 W/m2, respectively. The major sources of error in the estimates have also been discussed. The analysis adds an alternative technique to narrow the large difference between current model-based and observation-based global estimates of component ADRF by combining the satellite measurement with the model simulation.

KW - Aerosol direct radiative forcing

KW - Aerosol optical thickness

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UR - https://www.scopus.com/pages/publications/40649124767#tab=citedBy

U2 - 10.1016/j.jqsrt.2007.10.006

DO - 10.1016/j.jqsrt.2007.10.006

M3 - Article

SN - 0022-4073

VL - 109

SP - 1162

EP - 1186

JO - Journal of Quantitative Spectroscopy and Radiative Transfer

JF - Journal of Quantitative Spectroscopy and Radiative Transfer

IS - 7

ER -

Derivation of component aerosol direct radiative forcing at the top of atmosphere for clear-sky oceans

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Keywords

ASJC Scopus subject areas

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