華南前汛期雨澇強(qiáng)、弱年的確定及其環(huán)流特征對(duì)比

doi:10.3969/2014jms.0080

首頁(yè) > 過(guò)刊瀏覽>2015年第35卷第2期 >160-166. DOI:10.3969/2014jms.0080

華南前汛期雨澇強(qiáng)、弱年的確定及其環(huán)流特征對(duì)比
DOI:
                        10.3969/2014jms.0080
                    
CSTR:
                        
                    
作者:
                        
                        
                    
作者單位:
作者簡(jiǎn)介:
通訊作者:
中圖分類號(hào):
基金項(xiàng)目:福建省自然科學(xué)基金資助項(xiàng)目(2014J01146);福建省氣象局青年科技專項(xiàng)(2013q16)

Determination of strong and weak rain-waterlogging years in pre-rainy season over South China and their circulation features comparison

Author:

Affiliation:

Fund Project:

摘要

圖/表

訪問(wèn)統(tǒng)計(jì)

參考文獻(xiàn)

相似文獻(xiàn)

引證文獻(xiàn)

資源附件

文章評(píng)論

摘要:

用區(qū)域性暴雨過(guò)程綜合強(qiáng)度評(píng)估方法,在對(duì)1961—2010年華南前汛期逐場(chǎng)暴雨過(guò)程評(píng)估的基礎(chǔ)上,通過(guò)定義華南區(qū)域雨澇強(qiáng)度指數(shù)(RWI),劃分和確定了雨澇強(qiáng)、弱年,并對(duì)雨澇強(qiáng)、弱年的環(huán)流特征進(jìn)行合成分析。結(jié)果顯示:(1) RWI存在顯著的年際變化和年代際變化特征。雨澇強(qiáng)度在1990s初以后呈現(xiàn)明顯的增加趨勢(shì),雨澇強(qiáng)年明顯增多。(2)雨澇強(qiáng)(弱)年,南亞高壓偏南(北),副高位置偏西(東),歐亞中高緯500 hPa位勢(shì)高度差值場(chǎng)自西向東呈現(xiàn)+ - +的波列分布,則有利(不利)于華南區(qū)域降水的發(fā)展和持續(xù);(3)華南前汛期雨澇的強(qiáng)(弱)與大氣低層來(lái)自華中—華南北部的偏北風(fēng)輸送加強(qiáng)(減弱)、高原東南側(cè)的偏西風(fēng)和經(jīng)西太平洋—南海進(jìn)入華南的西南風(fēng)及水汽輸送異常加強(qiáng)(減弱)有著密切的關(guān)系。而與來(lái)自孟加拉灣進(jìn)入華南的偏南風(fēng)及水汽輸送強(qiáng)(弱)呈現(xiàn)反相關(guān)。(4)雨澇強(qiáng)(弱)年,冷空氣活動(dòng)頻率較高(低),持續(xù)時(shí)間較長(zhǎng)(短),強(qiáng)中心偏南(北)。且暖濕空氣較早(晚)到達(dá)25 °N地區(qū),并在30 °N以南地區(qū)維持時(shí)間較長(zhǎng)(短),季風(fēng)推進(jìn)快(慢)。

Abstract:

Based on the assessments on the heavy rainfall processes occurred in pre-rainy season over South China from 1961 to 2010 by the regional rainfall intensity model, the strong(weak) rain-waterlogging years were divided and labeled through defining the rain-water logging index(RWI), and their circulation features were also compositely analyzed.Results show that:(1) RWI implies prominent inter-annual and inter-decadal variation characteristics. In the early 1990s, the rain-waterlogging intensity tended obviously to increase trend and the strong rain-waterlogging years also increased. (2) In strong (weak) rain-waterlogging years, the South Asia high extends southward(northward), subtropical high extends farther westward(eastward) and the composite differences at 500 hPa height in mid-high latitude in Eurasia shows ‘+ - +’(- + -)waveforms from west to east, which is all advantageous(disadvantageous) to the development and continuity of rainfall in South China. (3) The strong(weak) rain-waterlogging is intimately linked with the strengthening(weakening) northerly winds from Central China-northern South China in the low layer of atmosphere and the anomalous strengthening(weakening) of westerly wind from the southeastern plateau, southwesterly winds from western Pacific- South China Sea to South China, as well as water vapor transportation. (4)In strong(weak) rain-waterlogging years, cold air activity is active (inactive) and has longer(shorter) duration with more south (north) location of strong center, moreover warm air arrives at 25 °N area earlier(later), its duration at further south of 30 °N is longer(shorter) and the monsoon moves forward faster (slower).

參考文獻(xiàn)

相似文獻(xiàn)

引證文獻(xiàn)

引用本文

羅艷艷,何金海,鄒燕,孫蔡亮.華南前汛期雨澇強(qiáng)、弱年的確定及其環(huán)流特征對(duì)比.氣象科學(xué),2015,35(2):160-166 LUO Yanyan, HE Jinhai, ZOU Yan, SUN Cailiang. Determination of strong and weak rain-waterlogging years in pre-rainy season over South China and their circulation features comparison. Journal of the Meteorological Sciences,2015,35(2):160-166

復(fù)制

文章指標(biāo)

點(diǎn)擊次數(shù):
下載次數(shù):
HTML閱讀次數(shù):
引用次數(shù):

歷史

收稿日期:2014-03-19
最后修改日期:2014-09-19
錄用日期:
在線發(fā)布日期: 2015-05-08
出版日期:

文章二維碼

您是第位訪問(wèn)者
氣象科學(xué) ® 2026 版權(quán)所有
技術(shù)支持：北京勤云科技發(fā)展有限公司

^{<td id="g7jtl"></td>}

抽查舔水白紧大视频,冲喜娘子超甜哒激情五月,亚洲黄色图片偷拍网站,亚洲三级黄片免费播放,91在线观看喷潮红桃,日韩精品在线观看一区二区,久久久久久久久久久久黄色片子,日产精品99久久久久久久久,欧洲亚洲另类图片小说

引用本文

分享

相關(guān)視頻

文章指標(biāo)

歷史

文章二維碼

抽查舔水白紧大视频,冲喜娘子超甜哒 激情五月,亚洲黄色图片偷拍网站,亚洲三级黄片免费播放,91在线观看喷潮红桃,日韩精品在线观看一区二区,久久久久久久久久久久黄色片子,日产精品99久久久久久久久,欧洲亚洲另类图片小说

引用本文

分享

相關(guān)視頻

文章指標(biāo)

歷史

文章二維碼

抽查舔水白紧大视频,冲喜娘子超甜哒激情五月,亚洲黄色图片偷拍网站,亚洲三级黄片免费播放,91在线观看喷潮红桃,日韩精品在线观看一区二区,久久久久久久久久久久黄色片子,日产精品99久久久久久久久,欧洲亚洲另类图片小说