| 西北地区东部降水的大气环流及水汽特征 |
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| 引用本文： | 张仲杰,康景芬,王士新,左洪超,魏桂英.西北地区东部降水的大气环流及水汽特征[J].新疆气象,2019,13(1):87-92. |
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| 作者姓名： | 张仲杰 康景芬 王士新 左洪超 魏桂英 |
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| 作者单位： | 白银市气象局;兰州大学大气科学学院 |
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| 基金项目： | “国家重点基础研究发展计划资助”2013CB430200(2013CB430206)；白银市科技计划项目(2015-2-30R) |
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| 摘 要： | 基于西北地区东部81站1961—2010年夏季(6—8月)逐月降水资料和NCEP/NCAR再分析资料,利用距平合成分析,探讨其多雨年和少雨年逐月500 hPa高度场和700 hPa湿度场特征。结果表明:西北地区东部多雨年,影响降水的天气特征表现为乌拉尔山脊逐月偏强,7月鄂霍次克海脊偏强,贝加尔湖高压脊转为低槽,7月巴尔喀什湖低槽较6月偏强。8月贝加尔湖长波槽较7月偏强;少雨年天气系统表现为6—8月西北地区东部受高压脊前西北气流控制。西太平洋副热带高压(以下简称:副高)多雨年较少雨年偏西偏强。6—8月多(少)雨年比湿的变化表明,西北地区东部降水多雨年,大气的含水量较高,西北地区东部降水少雨年,大气的含水量较低。
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| 关 键 词： | 西北地区东部 夏季降水 大气环流 比湿 合成分析 |
| 收稿时间： | 2017/6/23 0:00:00 |
| 修稿时间： | 2017/8/1 0:00:00 |
Precipitation Change in Eastern Part of Northwest China: Atmospheric Circulation andMoisture Content Characteristics |
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| Zhang Zhongjie,Kang Jingfeng,Wang Shixin,Zuo Hongchao and Wei Guiying.Precipitation Change in Eastern Part of Northwest China: Atmospheric Circulation andMoisture Content Characteristics[J].Bimonthly of Xinjiang Meteorology,2019,13(1):87-92. |
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| Authors: | Zhang Zhongjie Kang Jingfeng Wang Shixin Zuo Hongchao and Wei Guiying |
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| Institution: | Baiyin Meteorological Bureau of Gansu Province,Baiyin Meteorological Bureau of Gansu Province,College of Atmospheric Sciences,Lanzhou University,College of Atmospheric Sciences,Lanzhou University,Baiyin Meteorological Bureau of Gansu Province |
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| Abstract: | The eastern region of Northwest China from 1961 to 81 in the summer of 2010 (June - August) based on the monthly precipitation data and NCEP/NCAR reanalysis data, using anomaly synthetic analysis, discusses the characteristics of the wet and dry years from 500 hPa height field and humidity field in July 700 hPa. The results show that the eastern region of Northwest China rainy year, the weather affect the performance characteristics of precipitation for Ural ridge is strong in July monthly, Okhotsk ridge is strong, the ridge of Lake Baikal into the trough, the Balkhash Lake trough is stronger than in June, compared with July August Lake Baikal long wave trough is strong; less rain weather system performance for 6 years August - the eastern part of Northwest China Northwest Airflow Control under high pressure. The Western Pacific subtropical high (hereinafter referred to as subtropical high) has less rainfall and less rainfall than that of Western Pacific ocean. Water features in the eastern region of Northwest China rainy year corresponding to 700 hPa high humidity anomaly in dry years, corresponding to 700 hPa high humidity anomaly is negative. |
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| Keywords: | eastern part of northwest China Summer precipitation atmospheric circulation specific humidity composite analysis |
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