京津风沙源治理工程区植被对沙尘天气的时空影响  

Spatio-temporal pattern of impacts of vegetation on controlling sand-dust weather in Beijing-Tianjin Sandstorm Source Control Project

作　　者：崔晓 赵媛媛 丁国栋 信忠保 高广磊 于明含 Cui Xiao;Zhao Yuanyuan;Ding Guodong;Xin Zhongbao;Gao Guanglei;Yu Minghan(Key Laboratory of State Forestry Administration on Soil and Water Conservation,School of Soil and Water Conservation,BeijingForestry University,Beijing 100083,China;Yanchi Ecology Research Station of the Mu Us Desert,Yanchi 751500,China)

机构地区：[1]北京林业大学水土保持学院水土保持国家林业局重点实验室,北京100083 [2]宁夏盐池毛乌素沙地生态系统国家定位观测研究站,盐池751500

出　　处：《农业工程学报》2018年第12期171-179,310,共10页Transactions of the Chinese Society of Agricultural Engineering

基　　金：国家重点研发计划项目(2016YFC0500802);国家自然科学基金项目(41401095)

摘　　要：为了理解京津风沙源治理工程区植被对沙尘天气的影响,该文采用沙尘天气气象数据和归一化植被指数NDVI(normalized difference vegetation index)时间序列,分析了京津风沙源治理工程区(二期)2000-2013年沙尘天气发生日数和植被NDVI的时空格局,探究了沙尘天气与当年春季、前一年植被生长季NDVI之间的关系,揭示了植被对沙尘天气影响的时间格局和空间异质性特征。结果表明,2000-2013年,京津风沙源治理工程区(二期)沙尘天气发生日数呈显著下降趋势,同时区域植被NDVI显著增加;沙尘天气发生日数与当年5月、前一年8月的NDVI的相关性最强;约60.99%区域沙尘天气发生日数与当年5月NDVI显著相关,主要分布在典型草原中区、浑善达克沙地和农牧交错区;约19.59%的地区植被NDVI对沙尘天气的影响具有一定的滞后性,主要分布在鄂尔多斯高原东部、典型草原西区、燕山丘陵山地水源区北部。Sand-dust weather is a weather phenomenon where wind and dust are rolled into the air by strong winds making theair cloudy and visibility reduction. In meteorology, it is divided into three levels of dust, sand and sandstorms according to theintensity of sand-dust weather. Vegetation plays a significant role on controlling the sand-dust weather occurrence. In the pastdecades, sand-dust weather has a serious impact on people＇s lives and the socioeconomic development in cities of Beijing andTianjin, and Hebei province. In order to improve the air quality in Beijing and Tianjin and the surrounding areas, and mitigatethe hazards of wind and sand, China launched the Beijing-Tianjin Sandstorm Source Control Project in 2002. Previous studiesshowed that since implementation of the project, the overall ecological conditions in the region have been improved, anddesertification lands and dust weather have been significantly reduced. However, how the vegetation related to the sandstormweather in the Beijing-Tianjin Sandstorm Source Region （BTSSR） is still unclear. Therefore, we took BTSSR as the study area,which covers 138 counties in six administrative regions （i.e. province, autonomous regions or municipalities） in Beijing,Tianjin, Hebei, Shanxi, Inner Mongolia and Shaanxi Provinces. The data used in this study mainly included numbers ofsand-dust weather days （SWD） from China Meteorological Data Service Center （http：//data.cma.cn/） and SPOT/VGTNormalized Difference Vegetation Index （NDVI） S10 data from Cold and Arid Regions Science Data Platform ofEnvironmental and Ecological Science Data Center for West China （http：//westdc.westgis.ac.cn/）. We used the linear trendmethod to analyze the intra- and inter-annual patterns of sand-dust weather occurrence and vegetation dynamics from 2000 to2013. The correlation analysis was utilized to explore the relationship between SWD and the monthly NDVI ofconcurrent/antecedent year. The spatiotemporal pattern of impacts of the vegetation on sand-dust weather

关 键 词：植被 沙尘 NDVI 京津风沙源区 时空格局 

分 类 号：TU443[建筑科学—岩土工程]