南京不同功能区大气降尘速率及其影响因素分析  

Atmospheric Dustfall Rates in Various Functional Zones of Nanjing and Its Influential Factors

作　　者：李山泉[1,2] 李德成[1] 张甘霖[1] 

机构地区：[1]土壤与农业可持续发展国家重点实验室(中国科学院南京土壤研究所),南京210008 [2]中国科学院大学,北京100049

出　　处：《土壤》2014年第2期366-372,共7页Soils

基　　金：国家自然科学基金项目(No.41071142;41071141);中国科学院知识创新工程重要方向项目(KZCX2-EW-405-1)资助

摘　　要：对南京6个功能区2005—2008年间大气降尘特征及城市人为因素和气象环境因子研究表明,受人为影响较小的背景区域的大气背景降尘量较低且多年较稳定,但春季受西北地区沙尘传播影响而显著高于其他季节;大气降尘量在各功能区之间存在显著的差异,其基本趋势是:背景区最低,工业区显著高于交通干道和居民区;居民区和城郊区大气降尘受城市人为活动影响较小,其年季变化与背景区类似,随相对湿度增加而显著降低;工业/居民混合区和工业区的人为近源影响较大,降尘与气象因子的相关性较复杂,受降雨洗尘影响较大;交通干道的降尘与气象因素相关关系最弱,工业区降尘与降雨量呈显著负相关。Four years＇ dustfall at six functional zones in Nanjing and meteorological factors, along with the human impacts were studied in this article. Results showed that the background dustfall in the weak anthropogenic-impacted site was constant and at low levels. Due to the long-range transported Asian dust, the background dustfall in spring season was two times higher than in other seasons. The difference of dustfall among functional zones was significant, lowest at background site, and highest at industrial zones. Because the anthropogenic impact was relatively weak, the temporal variation of dustfall and meteorological influence at residential zone and suburban were similar to that at background site. Dustfall were all significantly reduced by the humidity. The anthropogenic impact on dustfall at industrial and residential mixture zone and industrial zone was heavy, making the influence of meteorology was complicated, and rain was an important factor there. No clear relationship between dustfall and meteorological factors was founded at traffic belt.

关 键 词：大气降尘 气象因子 功能区 南京 

分 类 号：P445.4[天文地球—大气科学及气象学]