干旱区生态环境知识资源中心(Arid): 京津风沙源治理工程区植被对沙尘天气的时空影响

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	京津风沙源治理工程区植被对沙尘天气的时空影响
其他题名	Spatio-temporal pattern of impacts of vegetation on controlling sand-dust weather in Beijing-Tianjin Sandstorm Source Control Project
	崔晓 1; 赵媛媛 1; 丁国栋 1; 信忠保 2; 高广磊 1; 于明含 1
来源期刊	农业工程学报
ISSN	1002-6819
出版年	2018
卷号	34 期号:12 页码:171-179,310
中文摘要	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。
英文摘要	Sand-dust weather is a weather phenomenon where wind and dust are rolled into the air by strong winds making the air cloudy and visibility reduction. In meteorology, it is divided into three levels of dust, sand and sandstorms according to the intensity of sand-dust weather. Vegetation plays a significant role on controlling the sand-dust weather occurrence. In the past decades, sand-dust weather has a serious impact on people’s lives and the socioeconomic development in cities of Beijing and Tianjin, and Hebei province. In order to improve the air quality in Beijing and Tianjin and the surrounding areas, and mitigate the hazards of wind and sand, China launched the Beijing-Tianjin Sandstorm Source Control Project in 2002. Previous studies showed that since implementation of the project, the overall ecological conditions in the region have been improved, and desertification lands and dust weather have been significantly reduced. However, how the vegetation related to the sandstorm weather 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 of sand-dust weather days (SWD) from China Meteorological Data Service Center (http://data.cma.cn/) and SPOT/VGT Normalized Difference Vegetation Index (NDVI) S10 data from Cold and Arid Regions Science Data Platform of Environmental and Ecological Science Data Center for West China (http://westdc.westgis.ac.cn/). We used the linear trend method to analyze the intra- and inter-annual patterns of sand-dust weather occurrence and vegetation dynamics from 2000 to 2013. The correlation analysis was utilized to explore the relationship between SWD and the monthly NDVI of concurrent/antecedent year. The spatiotemporal pattern of impacts of the vegetation on sand-dust weather was further revealed. The results showed that SWD in BTSSR was high in the west and low in the east. The average SWD of BTSSR was up to 15 days in 2000. The SWD in BTSSR were mainly occurred in spring, which accounted for up to 75.5% of the total. The maximum SWD appeared in 2001, it lasted about 25 days and after that the number of days for SWD decreased significantly till 2013. The NDVI was high in the east and low in the west. The annual NDVI in BTSSR increased smoothly from 2000 to 2013. Correlation analysis showed that the SWD had a more significant correlation with NDVI in concurrent May (R~2=0.55, P<0.01) and antecedent August (R~2=0.50,P<0.01). The BTSSR was classified into four sub-regions based on the lag effects of vegetation on the SWD. We found that in 19.59% of the BTSSR, the concurrent SWD was significantly correlated with NDVI of the antecedent year, which was mainly located in the sandy zones with vegetation cover of desert grassland and deciduous broad-leaved forest. In the typical steppe such as eastern part and central of typical grassland, the SWD was mainly controlled by the vegetation in the concurrent year. Vegetation, regardless of whether it is alive or withered, they can effectively block the effect of strong winds on the exposed surface, and at the same time reduce wind speed by increasing surface roughness. The main inhibitory effect of dust weather was the remnants of vegetation and withered vegetation in the antecedent year, such as that in Erdos plateau and Horqin sandy. We suggested that in the future, targeted prevention and management measures based on the time-delay characteristics of vegetation impact on sand-dust weather need to be conducted. The results are of great significance to the development and management of vegetation construction in BTSSR.
中文关键词	植被 ; 沙尘 ; 京津风沙源区 ; 时空格局
英文关键词	NDVI vegetation dust NDVI Beijing-Tianjin Sandstorm Source Region spatiotemporal pattern
语种	中文
国家	中国
收录类别	CSCD
WOS类目	CONSTRUCTION BUILDING TECHNOLOGY
WOS研究方向	Construction & Building Technology
CSCD记录号	CSCD:6287440
来源机构	北京林业大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/237982
作者单位	1.北京林业大学水土保持学院;;宁夏盐池毛乌素沙地生态系统国家定位观测研究站, 水土保持国家林业局重点实验室;;宁夏盐池毛乌素沙地生态系统国家定位观测研究站, ;;盐池, 北京;; 100083;;751500, 中国; 2.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, 中国
推荐引用方式 GB/T 7714	崔晓,赵媛媛,丁国栋,等. 京津风沙源治理工程区植被对沙尘天气的时空影响[J]. 北京林业大学,2018,34(12):171-179,310.
APA	崔晓,赵媛媛,丁国栋,信忠保,高广磊,&于明含.(2018).京津风沙源治理工程区植被对沙尘天气的时空影响.农业工程学报,34(12),171-179,310.
MLA	崔晓,et al."京津风沙源治理工程区植被对沙尘天气的时空影响".农业工程学报 34.12(2018):171-179,310.