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DOI10.5194/acp-18-17325-2018
CALIPSO (IIR-CALIOP) retrievals of cirrus cloud ice-particle concentrations
Mitchell, David L.1; Garnier, Anne2,3; Pelon, Jacques4; Erfani, Ehsan5
2018-12-06
发表期刊ATMOSPHERIC CHEMISTRY AND PHYSICS
ISSN1680-7316
EISSN1680-7324
出版年2018
卷号18期号:23页码:17325-17354
文章类型Article
语种英语
国家USA; France
英文摘要

A new satellite remote sensing method is described whereby the sensitivity of thermal infrared wave resonance absorption to small ice crystals is exploited to estimate cirrus cloud ice-particle number concentration N, effective diameter D-e and ice water content IWC. This method uses co-located observations from the Infrared Imaging Radiometer (IIR) and from the CALIOP (Cloud and Aerosol Lidar with Orthogonal Polarization) lidar aboard the CALIPSO (Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observation) polar orbiting satellite, employing IIR channels at 10.6 and 12.05 mu m. Using particle size distributions measured over many flights of the TC4 (Tropical Composition, Cloud and Climate Coupling) and the mid-latitude SPARTI-CUS (Small Particles in Cirrus) field campaigns, we show for the first time that N/IWC is tightly related to beta(eff); the ratio of effective absorption optical depths at 12.05 and 10.6 mu m. Relationships developed from in situ aircraft measurements are applied to beta(eff) derived from IIR measurements to retrieve N. This satellite remote sensing method is constrained by measurements of beta(eff) from the IIR and is by essence sensitive to the smallest ice crystals. Retrieval uncertainties are discussed, including uncertainties related to in situ measurement of small ice crystals (D < 15 mu m), which are studied through comparisons with IIR beta(eff). The method is applied here to single-layered semi-transparent clouds having a visible optical depth between about 0.3 and 3, where cloud base temperature is <= 235 K. CALIPSO data taken over 2 years have been analyzed for the years 2008 and 2013, with the dependence of cirrus cloud N and D-e on altitude, temperature, latitude, season (winter vs summer) and topography (land vs. ocean) described. The results for the mid-latitudes show a considerable dependence on season. In the high latitudes, N tends to be highest and D-e smallest, whereas the opposite is true for the tropics. The frequency of occurrence of these relatively thick cirrus clouds exhibited a strong seasonal dependence in the high latitudes, with the occurrence frequency during Arctic winter being at least twice that of any other season. Processes that could potentially explain some of these micro- and macroscopic cloud phenomena are discussed.


领域地球科学
收录类别SCI-E
WOS记录号WOS:000452383600005
WOS关键词IN-SITU OBSERVATIONS ; MICROPHYSICAL PROPERTIES ; EFFECTIVE EMISSIVITY ; RADIATIVE PROPERTIES ; INFRARED RADIANCES ; EFFECTIVE DIAMETER ; WATER-CONTENT ; ANVIL CLOUDS ; SIZE SPECTRA ; LIDAR
WOS类目Environmental Sciences ; Meteorology & Atmospheric Sciences
WOS研究方向Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
引用统计
文献类型期刊论文
条目标识符http://119.78.100.173/C666/handle/2XK7JSWQ/26177
专题地球科学
作者单位1.Desert Res Inst, Reno, NV 89512 USA;
2.Sci Syst & Applicat Inc, Hampton, VA USA;
3.NASA, Langley Res Ctr, Hampton, VA 23665 USA;
4.Sorbonne Univ, CNRS, Lab Atmospheres Milieux Observat Spatiales, Paris, France;
5.George Mason Univ, Dept Atmospher Ocean & Earth Sci AOES, Fairfax, VA 22030 USA
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GB/T 7714
Mitchell, David L.,Garnier, Anne,Pelon, Jacques,et al. CALIPSO (IIR-CALIOP) retrievals of cirrus cloud ice-particle concentrations[J]. ATMOSPHERIC CHEMISTRY AND PHYSICS,2018,18(23):17325-17354.
APA Mitchell, David L.,Garnier, Anne,Pelon, Jacques,&Erfani, Ehsan.(2018).CALIPSO (IIR-CALIOP) retrievals of cirrus cloud ice-particle concentrations.ATMOSPHERIC CHEMISTRY AND PHYSICS,18(23),17325-17354.
MLA Mitchell, David L.,et al."CALIPSO (IIR-CALIOP) retrievals of cirrus cloud ice-particle concentrations".ATMOSPHERIC CHEMISTRY AND PHYSICS 18.23(2018):17325-17354.
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