西北太平洋不同路徑下熱帶氣旋快速加強(qiáng)統(tǒng)計(jì)特征及影響因子分析

doi:10.3969/2015jms.0035

首頁 > 過刊瀏覽>2016年第36卷第2期 >194-202. DOI:10.3969/2015jms.0035

西北太平洋不同路徑下熱帶氣旋快速加強(qiáng)統(tǒng)計(jì)特征及影響因子分析
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                        10.3969/2015jms.0035
                    
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基金項(xiàng)目:國家自然科學(xué)基金資助項(xiàng)目(41275002和41175054),災(zāi)害天氣國家重點(diǎn)實(shí)驗(yàn)室開放課題(2014LASW-B08),江蘇省高校自然科學(xué)研究重大項(xiàng)目(14KJA170005),江蘇省"333高層次人才培養(yǎng)工程"

Characteristics and influence factors of the rapid intensification of tropical cyclone with different tracks in Northwest Pacific

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利用2002-2011年JTWC最佳路徑資料和NCEP的1°×1°全球最終分析資料以及熱帶氣旋年鑒,分析了西北太平洋不同路徑下熱帶氣旋(TC)快速加強(qiáng)(RI)的時空分布特征,并對不同路徑下快速加強(qiáng)(RITC)和緩慢加強(qiáng)(Non-RITC)兩組TC進(jìn)行合成分析和對比分析。結(jié)果表明:轉(zhuǎn)向路徑發(fā)生RI頻率最大,且轉(zhuǎn)向路徑中西轉(zhuǎn)向的TC最易發(fā)生RI過程;其次是東北和西北行路徑。在時間分布上,各個路徑下RI的月際和日變化具有不同的位相分布特征;在空間分布上,大多數(shù)RI過程發(fā)生在菲律賓和臺灣島以東洋面,西行路徑在南海北部也出現(xiàn)較多RI過程,轉(zhuǎn)向路徑RI過程多發(fā)生在轉(zhuǎn)向處。各個路徑下RITC與Non-RITC環(huán)境場存在較明顯差異,RITC對流層上層的南亞高壓相對較弱,中低層副高相對較強(qiáng),對流層低層存在較大的相對濕度,且濕度大值區(qū)域位于TC移動方向前側(cè)。不同路徑下的快速加強(qiáng)的環(huán)境影響因素也有所不同。

Abstract:

The best track datasets of JTWC and typhoons yearbooks for the past decades (2002-2011) in Northwestern Pacific are used to study the statistical characteristics of the rapid intensification(RI) of tropical cyclones(TCs) with different tracks. The different effects of the environmental factors between the RITCs and slow deepening tropical cyclones(Non-RITCs) are analyzed by using the dynamic composite analysis technique with the NCEP FNL data. It is showed that the probability of RI reaches the maximum when the TC track is turning(especially turning with the angle between 120°~125°). Then the northeastward and northwestward tracks follow in second and third position. There are differences of value and phase distribution in monthly and daily variations of RI among different tracks. And the east of Philippines and Taiwan Island is the region where TC rapid intensification is most likely to occur. If TC moves westward, some RI processes can also appear in the northern South China Sea. The statistics also indicate that once a TC takes a turning track, it often intensifies rapidly at its turning point. The environment fields of RITC and Non-RITC are dramatically different. The RITCs show the larger lower-level relative humidity in front of the moving direction. In contrast with Non-RITC, the South Asia high, which influences the RITC, is much weaker. The strength of subtropical high is strong. Differences of environmental effects are found among the RITCs with different tracks.

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尹浩,王詠青,鐘瑋.西北太平洋不同路徑下熱帶氣旋快速加強(qiáng)統(tǒng)計(jì)特征及影響因子分析.氣象科學(xué),2016,36(2):194-202 YIN Hao, WANG Yongqing, ZHONG Wei. Characteristics and influence factors of the rapid intensification of tropical cyclone with different tracks in Northwest Pacific. Journal of the Meteorological Sciences,2016,36(2):194-202

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收稿日期:2014-10-21
最后修改日期:2015-04-09
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在線發(fā)布日期: 2016-06-13
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