Spatial and temporal gradients in the rate of dust deposition and aerosol optical thickness in southwestern Iran

作     者：Mansour A FOROUSHANI Christian OPP Michael GROLL Mansour A FOROUSHANI;Christian OPP;Michael GROLL

作者机构：Department of GeographyPhilipps-Universität MarburgMarburg 35037Germany 

出 版 物：《Journal of Arid Land》 (干旱区科学（英文版）)

年 卷 期：2021年第13卷第1期

页      面：1-22页

核心收录：

学科分类：07[理学] 070602[理学-大气物理学与大气环境] 0706[理学-大气科学] 

基　　金：Iranian Meteorological Organization NOAA Air Resources Laboratory Team Army Research Laboratory, ARL 

主　　题：aerosol optical thickness ground deposition rate HYSPLIT dust deposition Iran 

摘      要：The southwestern Iran is one of the regions that are most prone to dust *** objective of this study is the analysis of the spatial and temporal distributions of dust deposition rate as a key factor for finding the relative impact of the ***,the monthly mean aerosol optical thickness(AOT)from Moderate Resolution Imaging Spectroradiometer(MODIS)was analyzed and compared with the dust amount variations from ground deposition rate(GDR),and the results were further used to investigate the spatial and temporal distributions of dust events in southwestern Iran for the period between 2014 and *** air mass trajectories,using the Hybrid Single-Particle Lagrangian Integrated Trajectory(HYSPLIT)model,were proven to be a discriminator of their local and regional *** results from GDR analysis produced a correlation coefficient between dust event history and deposition rates at dust magnitudes of0.93 that is meaningful at the 95%confidence ***,the deposition rates varied from 3 g/m2 per month in summer to 10 g/m2 per month in spring and gave insight into the transport direction of the *** the same time series,AOT correspondences with MODIS on Terra in four aerosol thickness layers(clean,thin,thick,and strong thick)were shown in relation to each *** deepest mixed layers were observed in spring and summer with a thickness of approximately 3500 m above ground level in the study *** of ground-based observations were correlated with the same variations for each aerosol thickness layer from MODIS images and they can be applied to discriminate layers of aeolian dust from layers of other ***,dust distribution plots from AOT participated to enhance mass calculations and estimation deposition rates from the thick and strong thick aerosol thickness layers using the results from *** all the advances of AOT,under certain circumstances,ground-based observations are better able to represent aerosol co