2007—2012年夏季中國(guó)青藏高原以東地區(qū)MCC的分布特征

doi:10.3969/2014jms.0008

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2007—2012年夏季中國(guó)青藏高原以東地區(qū)MCC的分布特征
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                        10.3969/2014jms.0008
                    
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基金項(xiàng)目:國(guó)家重點(diǎn)基礎(chǔ)研究發(fā)展計(jì)劃(973計(jì)劃)項(xiàng)目(2009CB421503;2013CB430103);國(guó)家自然科學(xué)基金資助項(xiàng)目(41375058);江蘇省優(yōu)秀科技創(chuàng)新團(tuán)隊(duì)基金;江蘇高校優(yōu)勢(shì)學(xué)科建設(shè)工程資助項(xiàng)目(PAPD)

Distribution characteristics of MCCs in eastern Tibetan Plateau in summer from 2007 to 2012

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用FY-2D和FY-2E地球靜止衛(wèi)星相當(dāng)黑體溫度資料,對(duì)2007—2012年夏季(6—8月)中國(guó)青藏高原以東地區(qū)的中尺度對(duì)流復(fù)合體(MCC)進(jìn)行普查分析,并分為MCC和類MCC(偏心率在0.5~0.6之間),共計(jì)190個(gè)MCC和62個(gè)類MCC。西南和華南地區(qū)的MCC和類MCC占總數(shù)的60%,華東和華中地區(qū)占總數(shù)的27%,東北、華北和西北地區(qū)最少。兩類MCC的生成源地和消散地的海陸性質(zhì)相同。東北和華北地區(qū)MCC主要向東北移動(dòng),華中和華東地區(qū)MCC向東南移動(dòng)。華南和西南地區(qū)的MCC移動(dòng)方向具有多樣性,大多為不移動(dòng)類型。從月際變化來(lái)看,MCC在6月份最多,類MCC在7月份最多。MCC的日變化具有區(qū)域性特征,西南地區(qū)的MCC在22:00—23:00是形成高峰,03:00—04:00達(dá)到成熟,06:00—08:00開始消散。東北、華北、華中和華東地區(qū)的MCC形成高峰在16:00—18:00,19:00—23:00和02:00—03:00是成熟高峰,21:00—01:00消散。華南地區(qū)的MCC主要形成在23:00—03:00,11:00—14:00成熟,14:00—15:00消散。

Abstract:

Based on the FY-2D and FY-2E geostationary satellite black body temperature(TBB) data in summer (June to August) from 2007 to 2012, the mesoscale convective complexes(MCC) in the eastern Tibetan Plateau of China were investigated and were classified into MCC and similar MCC(0.5-0.6 eccentricity).Results reveal that there were 190 MCCs and 62 similar MCCs in summer during 6 years. 60% MCCs and similar MCCs occurred in southwest China and south China, 27% in central-eastern China, but in northeast China, northwest China and north China they occurred the least. The land and sea properties of formation and dissipation regions of the two types of MCCs were similar. MCCs in northeast China and north China moved towards northeast; while in central-eastern China, mainly to southeast. Most of the MCCs in south China and southwest China moved in various directions, and most of them were almost stagnant. MCCs happened most in June while similar MCCs in July. The diurnal variation of MCC differed one from another: in southwest China, it formed at 22:00-23:00, matured in the early morning of 03:00-04:00 then dissipated in the morning of 06:00-08:00; in northeast China, north China, central and eastern China, it generated in the afternoon of 16:00-18:00, matured at night of 19:00-23:00 and in the early morning of 02:00-03:00, finally dissipated at night of 21:00-01:00; in south China, it formed around midnight of 23:00-03:00,matured around midday of 11:00-14:00 and disappeared at 14:00-15:00.

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常春輝,丁治英.2007—2012年夏季中國(guó)青藏高原以東地區(qū)MCC的分布特征.氣象科學(xué),2015,35(4):445-453 CHANG Chunhui, DING Zhiying. Distribution characteristics of MCCs in eastern Tibetan Plateau in summer from 2007 to 2012. Journal of the Meteorological Sciences,2015,35(4):445-453

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收稿日期:2013-11-28
最后修改日期:2014-01-11
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在線發(fā)布日期: 2015-09-11
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