基于Lamb-Jenkinson方法的天津地区PM_(2.5)污染环流型分析  

Circulation Pattern Analysis of PM_(2.5) Pollution in Tianjin Based on Lamb-Jenkinson Method

作　　者：马庚雪 李钢[2] 齐浩 王磊 刘春艳 MA Gengxue;LI Gang;QI Hao;WANG Lei;LIU Chunyan(Beichen Meteorological Bureau of Tianjin,Tianjin 300400,China;Tianjin Meteorological Observatory,Tianjin 300074,China)

机构地区：[1]天津市北辰区气象局,天津300400 [2]天津市气象台,天津300074

出　　处：《河南科学》2022年第11期1827-1833,共7页Henan Science

摘　　要：用2012—2019年逐日08时(北京时)NCEP/NCAR海平面气压场再分析资料,采用Lamb-Jenkinson客观环流分型方法,探究天津地区易发生PM_(2.5)污染的主要环流型,并对其进行验证.研究表明,天津地区主要存在6种环流型,分别为高压反气旋型、偏北气流型、偏东北气流型、低压气旋型、偏西北气流型和偏西气流型.为了进一步分析天津地区的污染环流型,定义污染环流指数B值,得到易引发天津地区PM污染的环流型,且按污染的形成机制可将其分为4类,即沙尘输送型、海风型、高压后部均压场型和低压前部均压场型.Based on the daily NCEP/NCAR sea level pressure field reanalysis data at 08:00(Beijing time)from2012 to 2019,the Lamb-Jenkinson objective circulation classification method is used to explore the main circulation patterns prone to PMpollution in Tianjin,which are verified in the end. The results show that there are six circulation patterns in Tianjin,which are high pressure anticyclone type,northerly flow type,northeasterly flow type,low pressure cyclone type,northwesterly flow type and westerly flow type. In order to further analyze the pollution circulation pattern in Tianjin area,the pollution circulation index B value is defined. The circulation patterns which are easy to cause PM_(2.5)pollution in Tianjin is obtained. According to the formation mechanism of pollution,the circulation patterns can be divided into four types,including dust transport type,sea breeze type,high pressure field pattern behind anticyclone and low pressure field pattern in front of cyclone.

关 键 词：Lamb-Jenkinson客观环流分型法 环流型 PM_(2.5) 天津地区 

分 类 号：X16[环境科学与工程—环境科学]