2010年11月大气环流和天气分析  

Analysis of the November 2010 Atmospheric Circulation and Weather

作　　者：于超 

机构地区：[1]国家气象中心,北京100081

出　　处：《气象》2011年第2期242-248,共7页Meteorological Monthly

摘　　要：2010年11月大气环流主要特征是:北半球高纬度地区为单一极涡,极涡中心位于新地岛以北,强度比常年略偏强。中高纬环流呈三波型分布,其中欧洲大槽较常年同期偏强,东亚大槽强度接近常年同期。亚洲以正高度距平为主,只有西伯利亚地区呈现负距平,表明冷空气势力较常年同期偏弱。西北太平洋副热带高压面积接近常年同期,强度略偏弱,脊线位置偏南,西脊点偏东。11月,全国平均气温为3.5℃,比常年同期(2.1℃)偏高1.4℃。全国平均降水量为11.8 mm,比常年同期(18.0 mm)偏少34.4%。月内,冷空气活动频繁,东北部分地区及内蒙古东部遭受雪灾;黄淮、华北等地气象干旱发展;湘鄂川渝黔等地的部分地区多大雾天气;内蒙古中西部遭受沙尘暴袭击;山东、重庆等地遭受风雹灾害。The following are the main characteristics of the general circulation of atmosphere in November 2010：there is a single polar vortex center in the Northern Hemisphere.The circulation presents a three-wave pattern in middle-high latitudes,where the European trough is stronger than the same period of normal years,and the East Asian trough closer to the same period;the polar vortex in the Novaya Zemlya and Siberia is negative anomalies,which show that the cold air is weaker than the same period of normal years; Northwest Pacific subtropical high area is close to the same period of normal years,with slightly weaker intensity,ridge line is located further south and western ridge point more eastward.The monthly mean temperature（3.5℃） is 1.4℃higher than and the mean precipitation（11.8 mm） is 34.4%less than the same period of normal years.In this month,cold air was frequent and part of the Northeast China and inner Mongolia suffered from snow disasters;Huanghe-Huaihe regions and North China had drought increased; Hunan,Hubei,Sichuan,Chongqing,Guizhou etc.had heavy fog weather;there were sandstorms in central and western Inner Mongolia;Shandong and Chongqing etc.suffered from wind and hail damages.

关 键 词：暴雪 冷空气 大雾 沙尘暴 风雹 

分 类 号：P434[天文地球—大气科学及气象学]