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DOI | 10.5194/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
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ISSN | 1680-7316 |
EISSN | 1680-7324 |
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 |
推荐引用方式 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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