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气象:2012,38(9):1103-1109
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天津一次雾过程的边界层特征研究
(天津市气象科学研究所,天津 300061)
Analysis on Characteristics of Atmospheric Boundary Layer During a Fog Process in Tianjin
(Tianjin Institute of Meteorology, Tianjin 300061)
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投稿时间:2011-06-28    修订日期:2012-02-27
中文摘要: 雾作为边界层内一种特殊的天气现象与边界层结构有着密切联系。本文利用天津边界层梯度观测平台分析2010年11月28日至12月2日一次雾过程的边界层结构特征。结果表明:此次过程雾Ⅰ阶段水汽最先在离地面80~100 m的高度凝结,雾Ⅱ(平流雾)阶段水汽由上往下传输;雾Ⅰ前,大气有明显的逆温,雾Ⅱ前大气处于不稳定状态,雾中大气趋于中性,在雾变薄过程中,边界层气象塔可观测到雾顶的强逆温;雾中长波辐射达到平衡,净长波辐射为0,可用此区分水雾和霾;雾对光化学烟雾有抑制作用,NOX和小粒子会出现累积,影响人体健康。
Abstract:The fog is a kind of special weather phenomenon and is closely related with structures of the atmospheric boundary layer. Based on the Tianjin boundary gradient observation system, we have analyzed a fog process from November 28 to December 2, 2010, which can be divided into two episodes, fogⅠ and fogⅡ. The results showed that: first the condensation of water was found from 80 to 100 m heights during fog Ⅰ and then vapor was transported downward during fogⅡ. There was obvious inversion temperature before fog Ⅰ and unstable atmosphere before fog Ⅱ.While fog Ⅱ happened, the atmospheric status was tending to be neutral, and there was a strong inversion temperature at the top of fog. Analysis on characteristics of radiation and pollution during fog process shows that, there was a long wave radiation equilibrium, an inhibition effect to the photochemical smog, and an accumulated effect of small particle and NOX during fog.
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基金项目:国家自然科学基金项目(41075004)、公益性行业(气象)科研专项(GYHY201006011)、环保公益行业科研专项(201009001 4)和天津市气象局科研课题(201104)共同资助
引用文本:
蔡子颖,韩素芹,吴彬贵,黄鹤,姚青,2012.天津一次雾过程的边界层特征研究[J].气象,38(9):1103-1109.
CAI Ziying,HAN Suqing,WU Bingui,HUANG He,YAO Qing,2012.Analysis on Characteristics of Atmospheric Boundary Layer During a Fog Process in Tianjin[J].Meteor Mon,38(9):1103-1109.