干旱区研究2017，Vol.34Issue(6)：1222-1229,8.DOI:10.13866/j.azr.2017.06.03
新疆策勒不同下垫面大气降尘时空分布特征
Spatio-temporal Distribution of Atmospheric Dustfall over Different Underlying Surfaces in Qira County, Xinjiang
摘要
Abstract
It is of great significance for researching air pollution,vegetation growth and local people's health through understanding the spatial and temporal distribution of atmospheric dustfall.Through observing the dustfall amount and average wind speed in open field,the methods of lab analysis and statistical analysis were used to study dustfall over different underlying surfaces including quicksand frontier,newly reclaimed farmland,fixed sandy land and inner oasis.The results showed that the atmospheric dustfall in Qira County occurred mainly in spring and summer,the maximum dustfall amount was 2 985.587 g · m-2 and occurred over shifting sandy land in newly reclaimed farmland.The least dustfall amount was 1 077.621 g · m-2 and occurred in inner oasis.The dustfall amount over shifting sandy land in newly reclaimed farmland was as high as 2.77 times of that in inner oasis.The dustfall amount was decreased with the increase of average wind speed,and it was increased at first and then decreased with the time increase of calm wind.The composition of dustfall materials was that the content of very coarse silt was higher than that of coarse silt,very fine sand,moderate silt,fine silt,very fine silt,fine sand and clay.The sorting of dustfall was moderate except that at the Grassland Station.Skewness and kurtosis of dustfall materials from the sites of quicksand frontier,newly reclaimed land,fixed sandy land and Rawak Station were the negative skewness and moderate platykurtic,and those from Grassland Station were the negative skewness and narrow kurtosis,separately.These revealed that the vegetation coverage and height as well as the degree of oasisization played an important role in atmospheric dustfall.关键词
大气环境/降尘/时空分布/风速/粒度/策勒Key words
atmospheric environment/dustfall/spatiotemporal distribution/wind speed/grain size/Qira引用本文复制引用
毛东雷,蔡富艳,雷加强,王雪梅,薛杰,来风兵..新疆策勒不同下垫面大气降尘时空分布特征[J].干旱区研究,2017,34(6):1222-1229,8.基金项目
新疆维吾尔自治区高校科研计划项目(XJEDU20161035) （XJEDU20161035）
新疆师范大学博士科研启动基金项目(XJNUBS1527) （XJNUBS1527）
国家自然科学基金项目(41601595,41661002,41661047) （41601595,41661002,41661047）
国家科技支撑计划项目“塔里木河下游退化生态系统恢复重建技术研发与示范”(2014BAC15B02)资助 （2014BAC15B02）
