%0 Journal Article
%T Numerical Study of a Dense Fog Event from 30 Nov to 1 Dec 2009<br>一次大雾形成过程的数值模拟分析
%A GAO Qian
%A HE Hui
%A MA Xincheng
%A HUANG Mengyu
%A SHI Aili
%A <br>高茜
%A 何晖
%A 马新成
%A 黄梦宇
%A 石爱丽
%J 气候与环境研究
%D 2012
%I 
%X The NCAR/PSU MM5v3 model is used to simulate a fog event in the Wuqing area from 30 Nov to 1 Dec 2009. This severe fog was distributed mainly in Tianjin, Hebei, and Shandong; Wuqing was at the edge of the fog area. This fog event can be seen as having three phases: After the formation phase from 1700 LST 30 Nov to 0000 LST 1 Dec, fog began to form at 0000 LST 1 Dec. The development phase lasted from 0000 LST to 0900 LST; after 0900 LST the fog began to disperse. With a cooldown caused by long-wave radiation cooling, an inversion appeared; in addition, sufficient water vapor was transferred by a warm wet flow. Weak convergent upward motion occurred in the surface layer. Under these conditions, fog formed. The maintenance of the inversion and sustained long-wave radiation cooling is conducive to continuous fog development. In the third phase, fog began to dissipate as a result of vapor divergence. Turbulence transfers water vapor, but if the turbulence is too strong, fog will dissipate quickly.
%K Dense fog
%K Numerical simulation
%K Formation analysis<br>大雾
%K 数值模拟
%K 形成机制分析
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=E62459D214FD64A3C8082E4ED1ABABED5711027BBBDDD35B&cid=28A2F569B2458C17&jid=484C10BAB5333C14751916EACFF8295F&aid=DC0994A58AFB6AE9BFC68CC1410989B0&yid=99E9153A83D4CB11&vid=BCA2697F357F2001&iid=B31275AF3241DB2D&sid=08F83145FA367D52&eid=AB1DE136C335A86C&journal_id=1006-9585&journal_name=气候与环境研究&referenced_num=0&reference_num=9