Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2018JD028726 |
Cirrus Horizontal Heterogeneity and 3-D Radiative Effects on Cloud Optical Property Retrievals From MODIS Near to Thermal Infrared Channels as a Function of Spatial Resolution | |
Fauchez, T.1,2; Platnick, S.2; Sourdeval, O.3; Wang, C.2,4; Meyer, K.2; Cornet, C.5; Szczap, F.6 | |
2018-10-16 | |
发表期刊 | JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES |
ISSN | 2169-897X |
EISSN | 2169-8996 |
出版年 | 2018 |
卷号 | 123期号:19页码:11141-11153 |
文章类型 | Article |
语种 | 英语 |
国家 | USA; Germany; France |
英文摘要 | To retrieve cloud optical properties, current satellite operational imager algorithms simplify the forward radiative transfer problem by assuming that cloudy pixels are horizontally homogeneous and radiatively independent. This study investigates the effects of cirrus horizontal heterogeneity and 3-D radiative effects on cloud optical thickness (COT) and ice crystal effective radius (CER) retrievals obtained using simulated nadir near-infrared/shortwave-infrared (NIR/SWIR) reflectances at 0.86 and 2.13 mu m and thermal infrared (TIR) radiances at 8.5, 11.0, and 12.0 mu m, first separately and next using the five wavelengths together. Synthetic cirrus radiation fields are generated using a cirrus 3-D cloud generator and a 3-D radiative transfer code. When both cloud 3-D and heterogeneity effects are considered, the solar reflectance-based retrievals have the largest errors (up to 10% for COT and 80% for CER, depending on solar angles) for spatial resolutions less than 500-1,000 m, while the TIR-based retrievals have the largest errors (up to 30% for COT and 50% for CER) above this resolution due to parallel homogeneous approximation bias. Therefore, TIR radiance-based retrievals are preferable for spatial resolutions equal or higher than similar to 500 m to 1 km, while NIR/SWIR reflectance-based retrievals are preferable for coarser spatial resolutions. The combination of NIR/SWIR and TIR measurements performed better together than individually for CER retrieval only for resolutions coarser than 2.5 km because 3-D effects are negligible at this scale. Thus, the spectral dependence of subpixel cloud horizontal heterogeneity and 3-D radiative effects has strong consequences when simultaneously using different channels for retrieving cirrus properties. |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000448374800021 |
WOS关键词 | OPTIMAL ESTIMATION ALGORITHM ; EFFECTIVE RADIUS ; EFFECTIVE EMISSIVITY ; SCALE DEPENDENCE ; ICE ; STRATOCUMULUS ; MODEL ; UNCERTAINTIES ; INHOMOGENEITY ; SENSITIVITY |
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/32523 |
专题 | 气候变化 |
作者单位 | 1.Univ Space Res Assoc, Columbia, MD 21046 USA; 2.NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA; 3.Univ Leipzig, Fac Phys & Earth Sci, Inst Meteorol, Leipzig, Germany; 4.Univ Maryland, Earth Syst Sci Interdisciplinary Ctr, College Pk, MD 20742 USA; 5.Univ Lille 1, Lab Opt Atmospher, UMR 8518, Villeneuve Dascq, France; 6.Univ Blaise Pascal, Lab Meteorol Phys, UMR 6016, Clermont Ferrand, France |
推荐引用方式 GB/T 7714 | Fauchez, T.,Platnick, S.,Sourdeval, O.,et al. Cirrus Horizontal Heterogeneity and 3-D Radiative Effects on Cloud Optical Property Retrievals From MODIS Near to Thermal Infrared Channels as a Function of Spatial Resolution[J]. JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,2018,123(19):11141-11153. |
APA | Fauchez, T..,Platnick, S..,Sourdeval, O..,Wang, C..,Meyer, K..,...&Szczap, F..(2018).Cirrus Horizontal Heterogeneity and 3-D Radiative Effects on Cloud Optical Property Retrievals From MODIS Near to Thermal Infrared Channels as a Function of Spatial Resolution.JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,123(19),11141-11153. |
MLA | Fauchez, T.,et al."Cirrus Horizontal Heterogeneity and 3-D Radiative Effects on Cloud Optical Property Retrievals From MODIS Near to Thermal Infrared Channels as a Function of Spatial Resolution".JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES 123.19(2018):11141-11153. |
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