首页|期刊导航|大气和海洋科学快报（英文版）|A Case Study of the Impacts of Dust Aerosols on Surface Atmospheric Variables and Energy Budgets in a Semi-Arid Region of China
大气和海洋科学快报（英文版）2010，Vol.3Issue(3)：145-150,6.
A Case Study of the Impacts of Dust Aerosols on Surface Atmospheric Variables and Energy Budgets in a Semi-Arid Region of China
A Case Study of the Impacts of Dust Aerosols on Surface Atmospheric Variables and Energy Budgets in a Semi-Arid Region of China
摘要
Abstract
The authors present a case study investigatingthe impacts of dust aerosols on surface atmospheric variables and energy budgets in a semi-arid region of China.Enhanced observational meteorological data, radiative fluxes, near-surface heat fluxes, and concentrations of dust aerosols were collected from Tongyu station, one of the reference sites of the International Coordinated Energy and Water Cycle Observations Project (CEOP), during a typical dust storm event in June 2006. A comprehensive analysis of these data show that in this semi-arid area, higher wind velocities and a continuously reduced air pressure were identified during the dust storm period.Dust storm events are usually associated with low relative humidity weather conditions, which result in low latent heat flux values. Dust aerosols suspended in the air decrease the net radiation, mainly by reducing the direct solar radiation reaching the land surface. This reduction in net radiation results in a decrease in soil temperatures at a depth of 2 cm. The combination of increased air temperature and decreased soil temperature strengthens the energy exchange of the atmosphere-earth system, increasing the surface sensible heat flux. After the dust storm event,the atmosphere was dominated by higher pressures and was relatively wet and cold. Net radiation and latent heat flux show an evident increase, while the surface sensible heat flux shows a clear decrease.关键词
case study/dust aerosol/energy budget/semi-arid regionKey words
case study/dust aerosol/energy budget/semi-arid region分类
天文与地球科学引用本文复制引用
LING Xiao-Lu,GUO Wei-Dong,ZHANG Le,ZHANG Ren-Jian..A Case Study of the Impacts of Dust Aerosols on Surface Atmospheric Variables and Energy Budgets in a Semi-Arid Region of China[J].大气和海洋科学快报（英文版）,2010,3(3):145-150,6.基金项目
This work was jointly supported by funds from the Knowledge Innovation Program of the chinese Academy of Sciences(Grant No．KZCX2-YW-Q11.03)and the National Basic Research Program of China (Grant No．2006CB400501) （Grant No．KZCX2-YW-Q11.03）
