首页|期刊导航|大气和海洋科学快报：英文版|Impact of Direct Radiative Forcing of Anthropogenic Aerosols on Diurnal Temperature Range in January in Eastern China
大气和海洋科学快报：英文版2011，Vol.4Issue(6)：356-362,7.
Impact of Direct Radiative Forcing of Anthropogenic Aerosols on Diurnal Temperature Range in January in Eastern China
Impact of Direct Radiative Forcing of Anthropogenic Aerosols on Diurnal Temperature Range in January in Eastern China
摘要
Abstract
This study investigates the changes in January diurnal temperature range （DTR） in China during 1961- 2000. The observed DTR changes during 1981-2000 relative to 1961-80 are first analyzed based on the daily temperature data at 546 weather stations. These observed DTR changes are classified into six cases depending on the changes in daily maximum and minimum temperatures, and then the occurrence frequency and magnitude of DTR change in each case are presented. Three transient simulations are then performed to understand the impact of greenhouse gases （GHGs） and aerosol direct forcing on DTR change： one without anthropogenic radiative forcing, one with anthropogenic GHGs, and another one with the combined forcing of GHGs and five species of anthropogenic aerosols. The predicted daily DTR changes during the years 1981-2000 are also classified into six cases and are compared with the observations. Results show that the previously proposed reason for DTR reduction, a stronger nocturnal warming than a daytime warming, explains only 19.8% of the observed DTR reduction days. DTR reduc- tions are found to generally occur in northeastern China, coinciding with significant regional warming. The simu- lation with GHG forcing alone reproduces this type of DTR reduction with an occurrence frequency of 32.9%, which is larger than the observed value. Aerosol direct forcing reduces DTR mainly by daytime cooling. Consideration of aerosol cooling improves the simulation of occurrence frequencies of different types of DTR changes as compared to the simulation with GHGs alone, but it cannot improve the prediction of the magnitude of DTR changes.关键词
直接辐射强迫/中国东部/昼夜温差/气溶胶/温室气体/发生频率/DTR/仿真模拟Key words
diurnal temperature range/greenhouse gases/anthropogenic aerosols/aerosol direct effect分类
天文与地球科学引用本文复制引用
CHANG Wen-Yuan,LIAO Hong..Impact of Direct Radiative Forcing of Anthropogenic Aerosols on Diurnal Temperature Range in January in Eastern China[J].大气和海洋科学快报：英文版,2011,4(6):356-362,7.基金项目
This work is supported by the Knowledge Innovation Program of the Chinese Academy of Sciences （Grant Nos. KZCX2-YW-Q11-03 and KZCX2-YW-QI-02）, the National Natural Science Foundation of China （Grant No. 40825016）, and the China Meteorological Administration for the Special Project of Meteorological Sector （Grant No. GYHY200906020）. We thank Prof. YAN Zhong-Wei of Institute of Atmospheric Physics for providing the daily temperature data from weather stations and the two anonymous reviewers＇ comme （）
