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DOI | 10.1016/j.atmosres.2020.104924 |
Vertical profiles of droplet size distributions derived from cloud-side observations by the research scanning polarimeter: Tests on simulated data | |
Alexandrov, Mikhail D.1,2; Miller, Daniel J.3; Rajapakshe, Chamara3,4; Fridlind, Ann2; van Diedenhoven, Bastiaan2,5; Cairns, Brian2; Ackerman, Andrew S.2; Zhang, Zhibo4 | |
2020-07-15 | |
发表期刊 | ATMOSPHERIC RESEARCH |
ISSN | 0169-8095 |
EISSN | 1873-2895 |
出版年 | 2020 |
卷号 | 239 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | The Research Scanning Polarimeter (RSP) is an airborne along-track scanner measuring the polarized and total reflectances with high angular resolution. It allows for accurate characterization of liquid water cloud droplet sizes using the rainbow structure in the polarized reflectance. RSP's observations also provide constraints on the cumulus clouds 2D cross section, yielding estimates of its geometric shape. In this study for the first time we evaluate the possibility to retrieve vertical profiles of microphysical characteristics along the cloud side by combining these micro- and macrophysical retrieval methods. First we constrain clouds geometric shape, then for each point on the bright side of its surface we collect data from different scans to obtain the mull-angle polarized reflectance at that point. The rainbow structures of the reflectances from multiple points yield the corresponding droplet size distributions (DSDs), which are then combined into vertical profiles. We present the results of testing the proposed profiling algorithm on simulated data obtained using large eddy simulations and 3D radiative transfer computations. The virtual RSP measurements were used for retrieval of DSD profiles, which then were compared to the actual data from the LES-model output. A cumulus congestus cloud was selected for these tests in preparation for analysis of real measurements made during the Cloud, Aerosol and Monsoon Processes Philippines Experiment (CAMP(2)Ex). We demonstrate that the use of the non-parametric Rainbow Fourier Transform (RFT) allows for adequate retrieval of the complex altitude-dependent bimodal structure of cloud DSDs. |
英文关键词 | Clouds Remote sensing Cloud droplet size Vertical profile Radiometry Polarization |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000525324000003 |
WOS关键词 | LARGE-EDDY SIMULATIONS ; RADIATIVE-TRANSFER ; IMPACT ; CONVECTION ; SCATTERING ; AEROSOL ; MODEL ; ENTRAINMENT ; RETRIEVALS ; VALIDATION |
WOS类目 | Meteorology & Atmospheric Sciences |
WOS研究方向 | 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/289281 |
专题 | 地球科学 |
作者单位 | 1.Columbia Univ, Dept Appl Phys & Appl Math, 2880 Broadway, New York, NY 10025 USA; 2.NASA, Goddard Inst Space Studies, 2880 Broadway, New York, NY 10025 USA; 3.NASA, Goddard Space Flight Ctr, Code 916, Greenbelt, MD 20771 USA; 4.Univ Maryland Baltimore Cty, Dept Phys, 1000 Hilltop Cir, Baltimore, MD 21250 USA; 5.Columbia Univ, Ctr Climate Syst Res, 2880 Broadway, New York, NY 10025 USA |
推荐引用方式 GB/T 7714 | Alexandrov, Mikhail D.,Miller, Daniel J.,Rajapakshe, Chamara,et al. Vertical profiles of droplet size distributions derived from cloud-side observations by the research scanning polarimeter: Tests on simulated data[J]. ATMOSPHERIC RESEARCH,2020,239. |
APA | Alexandrov, Mikhail D..,Miller, Daniel J..,Rajapakshe, Chamara.,Fridlind, Ann.,van Diedenhoven, Bastiaan.,...&Zhang, Zhibo.(2020).Vertical profiles of droplet size distributions derived from cloud-side observations by the research scanning polarimeter: Tests on simulated data.ATMOSPHERIC RESEARCH,239. |
MLA | Alexandrov, Mikhail D.,et al."Vertical profiles of droplet size distributions derived from cloud-side observations by the research scanning polarimeter: Tests on simulated data".ATMOSPHERIC RESEARCH 239(2020). |
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