Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.5194/acp-18-13283-2018 |
Evaluating the diurnal cycle of South Atlantic stratocumulus clouds as observed by MSG SEVIRI | |
Seethala, Chellappan1; Meirink, Jan Fokke2; Horvath, Akos3; Bennartz, Ralf4,5; Roebeling, Rob6 | |
2018-09-14 | |
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:17页码:13283-13304 |
文章类型 | Article |
语种 | 英语 |
国家 | Finland; Netherlands; Germany; USA |
英文摘要 | Marine stratocumulus (Sc) clouds play an essential role in the earth radiation budget. Here, we compare liquid water path (LWP), cloud optical thickness (tau), and cloud droplet effective radius (r(e)) retrievals from 2 years of collocated Spinning Enhanced Visible and Infrared Imager (SEVIRI), Moderate Resolution Imaging Spectroradiometer (MODIS), and Tropical Rainfall Measuring Mission (TRMM) Microwave Imager (TMI) observations; estimate the effect of biomass burning smoke on passive imager retrievals; and evaluate the diurnal cycle of South Atlantic marine Sc clouds. The effect of absorbing aerosols from biomass burning on the retrievals was investigated using the aerosol index (AI) obtained from the Ozone Monitoring Instrument (OMI). SEVIRI and MODIS LWPs were found to decrease with increasing AI relative to TMI LWP, consistent with well-known negative visible/near-infrared (VIS/NIR) retrieval biases in tau and r(e). In the aerosol-affected months of July-August-September, SEVIRI LWP - based on the 1.6 mu m r(e) - was biased low by 14 gm 2 (similar to 16 %) compared to TMI in overcast scenes, while MODIS LWP showed a smaller low bias of 4 gm 2 (similar to 5 %) for the 1.6 mu m channel and a high bias of 8 gm 2 (similar to 10 %) for the 3.7 mu m channel compared to TMI. Neglecting aerosol-affected pixels reduced the mean SEVIRI-TMI LWP bias considerably. For 2 years of data, SEVIRI LWP had a correlation with TMI and MODIS LWP of about 0.86 and 0.94, respectively, and biases of only 4-8 gm(-2) (5 %-10 %) for overcast cases. The SEVIRI LWP diurnal cycle was in good overall agreement with TMI except in the aerosol-affected months. Both TMI and SEVIRI LWP decreased from morning to late afternoon, after which a slow increase was observed. Terra and Aqua MODIS mean LWPs also suggested a similar diurnal variation. The relative amplitude of the 2-year-mean and seasonal-mean LWP diurnal cycle varied between 35% and 40% from morning to late afternoon for overcast cases. The diurnal variation in SEVIRI LWP was mainly due to changes in tau, while r(e) showed only little diurnal variability. |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000444618000003 |
WOS关键词 | LIQUID WATER PATH ; MARINE BOUNDARY-LAYER ; LOWER-TROPOSPHERIC STABILITY ; ABSORBING AEROSOLS ; GLOBAL OCEANS ; MICROPHYSICAL PROPERTIES ; SATELLITE-OBSERVATIONS ; SURFACE OBSERVATIONS ; SPATIAL VARIABILITY ; STRATIFORM CLOUDS |
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/26185 |
专题 | 地球科学 |
作者单位 | 1.Finnish Meteorol Inst, Kuopio, Finland; 2.Royal Netherlands Meteorol Inst, De Bilt, Netherlands; 3.Univ Hamburg, Hamburg, Germany; 4.Vanderbilt Univ, 221 Kirkland Hall, Nashville, TN 37235 USA; 5.Univ Wisconsin, Madison, WI USA; 6.EUMETSAT, Darmstadt, Germany |
推荐引用方式 GB/T 7714 | Seethala, Chellappan,Meirink, Jan Fokke,Horvath, Akos,et al. Evaluating the diurnal cycle of South Atlantic stratocumulus clouds as observed by MSG SEVIRI[J]. ATMOSPHERIC CHEMISTRY AND PHYSICS,2018,18(17):13283-13304. |
APA | Seethala, Chellappan,Meirink, Jan Fokke,Horvath, Akos,Bennartz, Ralf,&Roebeling, Rob.(2018).Evaluating the diurnal cycle of South Atlantic stratocumulus clouds as observed by MSG SEVIRI.ATMOSPHERIC CHEMISTRY AND PHYSICS,18(17),13283-13304. |
MLA | Seethala, Chellappan,et al."Evaluating the diurnal cycle of South Atlantic stratocumulus clouds as observed by MSG SEVIRI".ATMOSPHERIC CHEMISTRY AND PHYSICS 18.17(2018):13283-13304. |
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