喀斯特城市和森林地区大气降尘量的时空差异  

Spatial-temporal Variations of Atmospheric Dust Amount in Urban and Forest Areas of Karst Region

作　　者：唐杨[1] 韩贵琳[2] 李富山[1,3] 

机构地区：[1]中国科学院地球化学研究所,贵阳550002 [2]中国地质大学(北京)水资源与环境学院,北京100083 [3]中国科学院大学,北京100029

出　　处：《地球与环境》2015年第4期441-444,共4页Earth and Environment

基　　金：国家自然科学基金项目(41403109;41325030);国家重点基础研究发展计划(2013CB956703);中央高校基本科研业务费专项(2652013055)

摘　　要：本研究对喀斯特城市贵阳和自然保护区荔波的大气降尘进行分时段采集,采样时间为2009年5月至2010年3月,并统计了各时段内的大气降尘量。结果表明:贵阳的日均大气降尘通量为104mg/(m2·d),远高于荔波11.5mg/(m2·d)的日均降尘通量。受人为活动的影响,贵阳降尘量的季节性差异比荔波地区显著,冬春季节的降尘量高于夏秋季节。大气降尘量与同期的降水量和降水天数之间存在负相关关系,表明除了人为活动外,降水是影响贵阳地区大气降尘的关键因子。In this study, atmospheric dust samples were periodically collected and quantified in Guiyang City and Liho Natural Protection Zone both in the karst area from May 2009 to March 2010, Results show that the atmospheric dust deposition flux of Guiyang is 104 mg/（m2 .d）, much higher than 11.5 mg/（m2 .d） of Libo. Compared with Libo, seasonal variation of dust deposition fluxes in Guiyang is more obvious for the impact of human aotivities.Daily average dust deposition fluxes in winter and spring are higher than those in summer and autumn, There is a negative correlation between atmospheric dust deposition and precipitation amount or precipitation days,suggesting that besides human activities, precipitation is the key factor to influence atmospheric dust deposition in Guivang City.

关 键 词：降尘量 城市 降水 森林 

分 类 号：X513[环境科学与工程—环境工程]