Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.5194/acp-18-11303-2018 |
Net radiative effects of dust in the tropical North Atlantic based on integrated satellite observations and in situ measurements | |
Song, Qianqian1,2; Zhang, Zhibo1,2; Yu, Hongbin3; Kato, Seiji4; Yang, Ping5; Colarco, Peter3; Remer, Lorraine A.2; Ryder, Claire L.6 | |
通讯作者 | Zhang, Zhibo |
来源期刊 | ATMOSPHERIC CHEMISTRY AND PHYSICS
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ISSN | 1680-7316 |
EISSN | 1680-7324 |
出版年 | 2018 |
卷号 | 18期号:15页码:11303-11322 |
英文摘要 | In this study, we integrate recent in situ measurements with satellite retrievals of dust physical and radiative properties to quantify dust direct radiative effects on shortwave (SW) and longwave (LW) radiation (denoted as DRESW and DRELW, respectively) in the tropical North Atlantic during the summer months from 2007 to 2010. Through linear regression of the CERES-measured top-of-atmosphere (TOA) flux versus satellite aerosol optical depth (AOD) retrievals, we estimate the instantaneous DRESW efficiency at the TOA to be -49.7 +/- 7.1 W m(-2) AOD(-1) and -36.5 +/- 4.8 W m(-2) AOD(-1) based on AOD from MODIS and CALIOP, respectively. We then perform various sensitivity studies based on recent measurements of dust particle size distribution (PSD), refractive index, and particle shape distribution to determine how the dust microphysical and optical properties affect DRE estimates and its agreement with the above-mentioned satellite-derived DREs. Our analysis shows that a good agreement with the observation-based estimates of instantaneous DRESW and DRELW can be achieved through a combination of recently observed PSD with substantial presence of coarse particles, a less absorptive SW refractive index, and spheroid shapes. Based on this optimal combination of dust physical properties we further estimate the diurnal mean dust DRESW in the region of -10 W m(-2) at TOA and -26 W m(-2) at the surface, respectively, of which similar to 30% is canceled out by the positive DRELW. This yields a net DRE of about -6.9 and -18.3 W m(-2) at TOA and the surface, respectively. Our study suggests that the LW flux contains useful information on dust particle size, which could be used together with SW observations to achieve a more holistic understanding of the dust radiative effect. |
类型 | Article |
语种 | 英语 |
国家 | USA ; England |
收录类别 | SCI-E |
WOS记录号 | WOS:000441403800007 |
WOS关键词 | AIRBORNE MINERAL AEROSOLS ; INFRARED OPTICAL DEPTH ; SAHARAN DUST ; REFRACTIVE-INDEX ; DESERT DUST ; SIZE DISTRIBUTION ; BOUNDARY-LAYER ; ATMOSPHERIC TRANSPORT ; CLIMATE RESPONSE ; MODIS |
WOS类目 | Environmental Sciences ; Meteorology & Atmospheric Sciences |
WOS研究方向 | Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/207901 |
作者单位 | 1.Univ Maryland Baltimore Cty, Phys Dept, Baltimore, MD 21228 USA; 2.Univ Maryland Baltimore Cty, Joint Ctr Earth Syst Technol, Baltimore, MD 21228 USA; 3.NASA, Goddard Space Flight Ctr, Greenbelt, MD USA; 4.NASA, Langley Res Ctr, Hampton, VA 23665 USA; 5.Texas A&M Univ, Dept Atmospher Sci, College Stn, TX USA; 6.Univ Reading, Dept Meteorol, Reading RG6 6BB, Berks, England |
推荐引用方式 GB/T 7714 | Song, Qianqian,Zhang, Zhibo,Yu, Hongbin,et al. Net radiative effects of dust in the tropical North Atlantic based on integrated satellite observations and in situ measurements[J],2018,18(15):11303-11322. |
APA | Song, Qianqian.,Zhang, Zhibo.,Yu, Hongbin.,Kato, Seiji.,Yang, Ping.,...&Ryder, Claire L..(2018).Net radiative effects of dust in the tropical North Atlantic based on integrated satellite observations and in situ measurements.ATMOSPHERIC CHEMISTRY AND PHYSICS,18(15),11303-11322. |
MLA | Song, Qianqian,et al."Net radiative effects of dust in the tropical North Atlantic based on integrated satellite observations and in situ measurements".ATMOSPHERIC CHEMISTRY AND PHYSICS 18.15(2018):11303-11322. |
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