干旱区生态环境知识资源中心(Arid): A stratified environmental reference system for better understanding of the relationship between remote sensing observations and ground monitoring of karst rocky desertification

Arid

DOI	10.1002/ldr.4232
	A stratified environmental reference system for better understanding of the relationship between remote sensing observations and ground monitoring of karst rocky desertification
	Xu, Erqi; Zhang, Hongqi
通讯作者	Xu, ER ; Zhang, HQ
来源期刊	LAND DEGRADATION & DEVELOPMENT
ISSN	1085-3278
EISSN	1099-145X
出版年	2022
卷号	33 期号:9 页码:1366-1382
英文摘要	Quickly and accurately monitoring karst rocky desertification via remote sensing could assist in its mitigation. Yet this is limited by high environmental heterogeneity that introduces uncertainty into satellite observations' relationships with ground-based karst rocky desertification. Influenced by variations of environmental factors, the relevance of satellite data for karst rocky desertification is questionable, especially at a large geographic scale. Here a novel stratified degradation reference system was built to describe this complex relationship. The method was applied in Guizhou-Guangxi Karst Mountainous Region, a typical karst region in China undergoing severe karst rocky desertification. A stratified procedure of elevation-based initial division and sub-division of lithology and land use was designed using moderate resolution imaging spectroradiometer (MODIS) data. MODIS values of surface vegetation, albedo, and temperature products were standardized by percentiles to reveal their relevance for evaluating each environmental stratification of land degradation. We found a substantial spatial variation of MODIS observations across elevation gradients and different land uses. This was corrected using our proposed reference method, wherein standardized MODIS observations show a nonlinear but clear downward trend with increasing karst rocky desertification intensities. Most areas affected by karst rocky desertification had lower MODIS values. Using the stratified environmental reference approach between MODIS observations and karst rocky desertification can enable the cost-effective screening of high-heterogeneity karst areas, to better support monitoring and identify desertification hotspots.
英文关键词	degraded baseline elevation gradient karst rocky desertification remote sensing monitoring stratification
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000780930600001
WOS关键词	ELEVATION GRADIENT ; DRIVING FORCES ; TIME-SERIES ; MODIS ; NDVI ; VEGETATION ; LANDSAT ; ALGORITHM ; GUIZHOU ; TEMPERATURE
WOS类目	Environmental Sciences ; Soil Science
WOS研究方向	Environmental Sciences & Ecology ; Agriculture
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/393713
推荐引用方式 GB/T 7714	Xu, Erqi,Zhang, Hongqi. A stratified environmental reference system for better understanding of the relationship between remote sensing observations and ground monitoring of karst rocky desertification[J],2022,33(9):1366-1382.
APA	Xu, Erqi,&Zhang, Hongqi.(2022).A stratified environmental reference system for better understanding of the relationship between remote sensing observations and ground monitoring of karst rocky desertification.LAND DEGRADATION & DEVELOPMENT,33(9),1366-1382.
MLA	Xu, Erqi,et al."A stratified environmental reference system for better understanding of the relationship between remote sensing observations and ground monitoring of karst rocky desertification".LAND DEGRADATION & DEVELOPMENT 33.9(2022):1366-1382.