利用CloudSat/CALIPSO衛(wèi)星資料分析北半球污染排放區(qū)云型頻率分布特征

doi:10.12306/2021jms.0006

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利用CloudSat/CALIPSO衛(wèi)星資料分析北半球污染排放區(qū)云型頻率分布特征
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                        10.12306/2021jms.0006
                    
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中圖分類號:P426.5
基金項目:國家自然科學基金資助項目(41975002;42061134009)

Analysis of cloud-type distribution characteristics over major aerosol emission regions in the Northern Hemisphere by using CloudSat/CALIPSO satellite data

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本文利用A-Train衛(wèi)星隊列中的Cloudsat衛(wèi)星所提供的二級云分類產(chǎn)品資料(結(jié)合了CALIPSO衛(wèi)星氣溶膠激光雷達)2B-CLDCLASS-LIDAR,選取2007年3月至2017年2月的樣本數(shù)據(jù)進行統(tǒng)計分析,研究北半球主要的氣溶膠排放源區(qū)(中國東部,美國東部和歐洲西部)不同云型出現(xiàn)頻率的分布特征。結(jié)果表明,在以單層云出現(xiàn)的8種云類中卷云,層積云和積云的發(fā)生頻率總和高達50%~70%,其次為高層云、高積云和雨層云,而深對流云和層云這兩種云僅占10%以下。各類云的發(fā)生頻率的空間分布可看出卷云和層積云的發(fā)生頻率可高達90%以上,高層云的發(fā)生頻率在70%~80%左右,高積云和積云的發(fā)生頻率則接近70%以上,深對流云和層云的發(fā)生頻率則在20%以下。其中,卷云、深對流云和積云主要出現(xiàn)在低緯度的海洋上;高層云和高積云主要出現(xiàn)在中低緯工業(yè)發(fā)達的陸地上;層積云、層云和雨層云主要出現(xiàn)在中高緯地區(qū),其中層積云和層云出現(xiàn)在海洋上居多,雨層云出現(xiàn)頻次的海陸差別不大。不同云型在不同的季節(jié)出現(xiàn)頻次差異明顯,在夏季出現(xiàn)較多的云型以卷云、深對流云,積云和層云為主;在冬季則是高層云、層積云和雨層云這樣穩(wěn)定型的云型占據(jù)主導,同時還發(fā)現(xiàn)卷云和層積云發(fā)生頻率的月變化相反,而高層云和雨層云發(fā)生頻率的月變化相似。

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In this paper, the secondary cloud classification product data(combined with CALIPSO satellite which has the aerosol lidar) 2 B-CLDCLASS-LIDAR provided by the Cloudsat satellite belonging to the A-Train satellite train were used. And a total of 8 years of sample data from March 2007 to February 2010 and March 2013 to February 2016 were employed for statistical analysis which studied the distribution characteristics of various clouds in the major aerosol emission areas of the Northern Hemisphere(eastern China, eastern US, and western Europe).Resultsshow that in the 8 types of clouds that appear as single-layer clouds, the total occurrence frequency of cirrus, stratocumulus and cumulus is as high as 50% to 70%, followed by altostratus, altocumulus and nimbostratus. While the two types of clouds, deep convective clouds and stratus, account for less than 10%. The spatial distribution of the occurrence frequency of clouds can be as high as 90% for cirrus and stratocumulus, about 70% to 80% for altostratus, and nearly 70% for altocumulus and cumulus, while only nearly 20% for deep convective clouds and stratus. Among them, cirrus, deep convective clouds and cumulus are mostly found in low-latitude marine areas. Altostratus and altocumulus are mostly found in mid-low latitudes land areas where are industrially developed. Stratocumulus and stratus and nimbostratus are mostly found in mid-high latitudes, but stratocumulus and stratus mostly occurred in marine areas, nimbostratus mostly occurred in land areas and the occurrence frequency of nimbostratus occurring in sea and land is not much different. The frequency of different cloud types in different seasons is obviously different. The occurrence of clouds in spring and autumn is relatively less. In summer, cloud types occurring most are mainly cirrus, deep convective clouds, cumulus and stratus. And the table cloud types, such as altostratus and stratocumulus and nimbostratus, dominate in winter. It is also found that the monthly changes in the occurrence frequency of cirrus and stratocumulus are opposite, while the monthly changes in the occurrence frequency of altostratus and nimbostratus are similar.

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牛璽,馬曉燕,賈海靈.利用CloudSat/CALIPSO衛(wèi)星資料分析北半球污染排放區(qū)云型頻率分布特征.氣象科學,2022,42(4):467-480 NIU Xi, MA Xiao-yan, JIA Hai-ling. Analysis of cloud-type distribution characteristics over major aerosol emission regions in the Northern Hemisphere by using CloudSat/CALIPSO satellite data. Journal of the Meteorological Sciences,2022,42(4):467-480

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收稿日期:2020-06-15
最后修改日期:2020-12-28
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在線發(fā)布日期: 2022-10-20
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