大气科学2017，Vol.41Issue(5)：960-974,15.DOI:10.3878/j.issn.1006-9895.1703.16216
利用WRF-Chem模式模拟分析人为气溶胶对台风Fitow(1323)强度及降水的影响
Simulations of Anthropogenic Aerosols Effects on the Intensity and Precipitation of Typhoon Fitow (1323) Using WRF-Chem Model
摘要
Abstract
To investigate the impacts of anthropogenic aerosols on typhoon Fitow,the No.23 typhoon in 2013,three simulations with zero,normal and increased anthropogenic emissions were conducted by using WRF-Chem V3.5 (Weather Research and Forecasting Model coupled to Chemistry Version 3.5).Comparison of the results shows that anthropogenic aerosols could hardly influence the track of Fitow.The increased anthropogenic aerosols led to weakened intensity,reduced total accumulated precipitation and decreased precipitation rate in typhoon main body during the phase when Fitow approached the land.Increased aerosols could provide more cloud condensation nuclei,which leads to increased cloud water at the periphery.Therefore,more cloud water could rise above the freezing level and produced more supercooled water,which provided an advantage for the forming of ice particles.These processes not only released extra amount of latent heat,but also enhanced the convection and precipitation at the periphery of typhoon.Furthermore,the invigorated convection at periphery caused an increase in warm and moist air lifted there and a decrease in inflow reaching the typhoon center,and hence resulted in a weakened eyewall and precipitation near the eyewall.The strength of typhoon was weakened.Precipitation at eyewall still dominated precipitation over the typhoon main body due to the weaker convection at its periphery.As a result,total accumulated precipitation and precipitation rate in the typhoon main body both decreased.关键词
台风/强度/降水/人为气溶胶/WRF-Chem模式Key words
Typhoon/Intensity/Precipitation/Anthropogenic aerosols/WRF-Chem model分类
天文与地球科学引用本文复制引用
沈新勇,姜晓岑,柳笛,祖繁,樊曙先..利用WRF-Chem模式模拟分析人为气溶胶对台风Fitow(1323)强度及降水的影响[J].大气科学,2017,41(5):960-974,15.基金项目
科技部国家大气污染专项项目 2016YFC0203301,国家重点基础研究发展计划(973计划)项目 2015CB453201,国家自然科学基金项目 41375058、41530427,江苏省自然科学基金重点项目 BK20150062 （973计划）
National Key Project of Ministry of Science and Technology of China (Grant 2016YFC0203301),National Key Basic Research and Development Project of China (Grant 2015CB453201),National Natural Science Foundation of China (Grants 41375058 and 41530427),Jiangsu Natural Science Key Project (Grant BK20150062) （Grant 2016YFC0203301）
