Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1002/2016JD025954 |
Can MODIS cloud fraction fully represent the diurnal and seasonal variations at DOE ARM SGP and Manus sites? | |
Wang, Yang1,2; Zhao, Chuanfeng1,2 | |
2017 | |
发表期刊 | JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
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ISSN | 2169-897X |
EISSN | 2169-8996 |
出版年 | 2017 |
卷号 | 122期号:1 |
文章类型 | Article |
语种 | 英语 |
国家 | Peoples R China |
英文摘要 | Though cloud fraction (CF) from Moderate Resolution Imaging Spectroradiometer (MODIS) has been widely used, it remains unclear whether it can fully represent the diurnal variations. This study evaluates the time representation (i.e., satellite passes' mean value per day to represent daily average value) error in MODIS CF by using daytime-only total sky cover and continuous day-and-night radar/lidar CF (Active Remote Sensing of Clouds product, ARSCL) from 2000 to 2010 for two Atmospheric Radiation Measurement (ARM) program climate regime sites of Southern Great Plains (SGP) and Manus. By comparing the daily averaged CFs from ARSCL between using all hourly and using the MODIS-passing-time observations, it shows a correlation coefficient of 0.93 (0.88) and root mean square deviation (RMSD) of 12.68% (13.27%) over SGP (Manus) site for daily averaged CFs. Differently, it shows a better correlation coefficient of 0.97 (0.97) and smaller RMSD of 2.98% (3.97%) over SGP (Manus) site for monthly averaged CFs. These suggest that considerable errors could be introduced while using the MODIS CF observed at several fixed time points a day to represent average CF at different time scales. Monthly time representation errors have also been evaluated for daytime only and nighttime only, which show even larger values. A further analysis shows that uncertainties caused by the time representation account for about 23% (21%) of the total differences between surface and MODIS CFs over SGP (Manus) site at monthly time scale. |
英文关键词 | cloud fraction MODIS time representation error |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000393877800019 |
WOS关键词 | MIDLATITUDE CONTINENTAL CLOUDS ; SURFACE OBSERVATIONS ; CENTRAL FACILITY ; A-TRAIN ; PART I ; SATELLITE ; RADIATION ; CLIMATOLOGY ; COVER ; RADAR |
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/32734 |
专题 | 气候变化 |
作者单位 | 1.Beijing Normal Univ, Coll Global Change & Earth Syst Sci, Beijing, Peoples R China; 2.Beijing Normal Univ, Joint Ctr Global Change Studies, Beijing, Peoples R China |
推荐引用方式 GB/T 7714 | Wang, Yang,Zhao, Chuanfeng. Can MODIS cloud fraction fully represent the diurnal and seasonal variations at DOE ARM SGP and Manus sites?[J]. JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,2017,122(1). |
APA | Wang, Yang,&Zhao, Chuanfeng.(2017).Can MODIS cloud fraction fully represent the diurnal and seasonal variations at DOE ARM SGP and Manus sites?.JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,122(1). |
MLA | Wang, Yang,et al."Can MODIS cloud fraction fully represent the diurnal and seasonal variations at DOE ARM SGP and Manus sites?".JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES 122.1(2017). |
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