湖南澇年主汛期降水低頻振蕩特征分析

doi:10.3969/2018jms.0062

首頁(yè) > 過(guò)刊瀏覽>2019年第39卷第5期 >644-653. DOI:10.3969/2018jms.0062

湖南澇年主汛期降水低頻振蕩特征分析
DOI:
                        10.3969/2018jms.0062
                    
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:中國(guó)氣象局預(yù)報(bào)員專項(xiàng)（CMAYBY2019-078）；湖南省氣象局預(yù)報(bào)員專項(xiàng)（XQKJ18C011）；湖南省氣象局氣象預(yù)報(bào)業(yè)務(wù)能力建設(shè)專項(xiàng)（YBNL16-05）；10-20 d延伸期天氣預(yù)報(bào)技術(shù)研究項(xiàng)目共同資助

Analysis on the characteristics of low frequency oscillation in precipitation in flood season in Hunan Province

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:

本文基于1986-2015年湖南逐日降水?dāng)?shù)據(jù)以及同期NCEP/NCAR再分析資料，分析旱澇年主汛期（5-7月）降水低頻振蕩特征，并利用位相合成方法研究澇年主汛期20~50 d低頻環(huán)流演變特征。結(jié)果發(fā)現(xiàn)，湖南地區(qū)20~50 d和10~20 d的低頻降水方差貢獻(xiàn)比都具有南高北低的分布特征，10~20 d的低頻振蕩在旱澇年中皆較普遍存在，而20~50 d的低頻振蕩只在澇年普遍存在，20~50 d低頻振蕩對(duì)澇年有一定的指示意義。對(duì)澇年主汛期20~50 d低頻降水進(jìn)行位相合成發(fā)現(xiàn)，在活躍位相（中斷位相），夏季南亞高壓和西太平洋副熱帶高壓（簡(jiǎn)稱西太副高）緯向異常接近或者重疊（分離），湖南地區(qū)降水偏多（偏少），且兩個(gè)高壓的強(qiáng)度、范圍、以及脊線位置和湖南地區(qū)主汛期降水關(guān)系較密切。南海反氣旋（氣旋）、河套地區(qū)槽（脊）系統(tǒng)以及湖南地區(qū)的垂直速度和比濕配合度高，且隨位相變化存在明顯的周期振蕩，其中南海反氣旋（氣旋）和河套地區(qū)槽脊系統(tǒng)配置與湖南低頻降水有著高度的時(shí)間一致性，湖南地區(qū)的低頻垂直速度和低頻比濕較低頻降水有一個(gè)位相的超前滯后關(guān)系。此外，隨著位相的演變，低頻南北風(fēng)高值區(qū)皆有明顯的北傳特征。

Abstract:

Based on the daily precipitation data in Hunan during 1986-2015 and the NCEP/NCAR reanalysis data in the same period, this paper analyzed the characteristics of low frequency oscillations in precipitation during the main flood season (from May to July) in drought and flood years and studied the evolution characteristics of low-frequency circulation in the man flood seasons in drought and flood years for 20-50 days. The results showed that the distributions of variance of low-frequency precipitation at 20-50 days and 10-20 days in Hunan Province both had the characteristics of high in the south and low in the north. The low-frequency oscillations of 10-20 d are more common during the droughts and floods, while the low-frequency oscillations of 20-50 d are common only during the flood years. Low frequency oscillation of 20-50 d has some indications for the flood years. The phase composition of 20-50 d low-frequency precipitation in the flood seasons shows that in the active phase (discontinuous phase), when the latitudinal direction of the South Asian High and the latitudinal direction of the Western Pacific Subtropical High (WPSH) are abnormally close to or overlap (separate), the precipitation in Hunan is relatively more (less), and the intensity of two high-pressure, range, and ridge location are more closely related to flood season precipitation in Hunan. The anticyclone (cyclone) in the South China Sea, the trough (ridge) system in Hetao region and the vertical velocity and specific humidity in Hunan Province are well coordinated, and there is obvious periodic oscillation along with the phase change. The anticyclone (cyclone) and Hetao systems in the South China Sea have a high degree of temporal consistency with low-frequency precipitation in Hunan. The low-frequency vertical velocity in Hunan Province has a phase-lead lag relation with the low-frequency precipitation. In addition, with the evolution of the phase, the low-frequency NW wind region has obvious northward transmission characteristics.

參考文獻(xiàn)

相似文獻(xiàn)

引證文獻(xiàn)

引用本文

周莉,蔡榮輝,蘭明才,姚蓉,楊云蕓.湖南澇年主汛期降水低頻振蕩特征分析.氣象科學(xué),2019,39(5):644-653 ZHOU Li, CAI Ronghui, LAN Mingcai, YAO Rong, YANG Yunyun. Analysis on the characteristics of low frequency oscillation in precipitation in flood season in Hunan Province. Journal of the Meteorological Sciences,2019,39(5):644-653

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:2018-02-09
最后修改日期:2018-05-22
錄用日期:
在線發(fā)布日期: 2019-11-11
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

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