干旱区生态环境知识资源中心(Arid): NDVI Spatio-temporal Patterns and Climatic Controls Over Northern Patagonia

Arid

DOI	10.1007/s10021-019-00389-3
	NDVI Spatio-temporal Patterns and Climatic Controls Over Northern Patagonia
	Bianchi, Emilio 1; Villalba, Ricardo 2; Solarte, Andres 3
通讯作者	Bianchi, Emilio
来源期刊	ECOSYSTEMS
ISSN	1432-9840
EISSN	1435-0629
出版年	2020
卷号	23 期号:1 页码:84-97
英文摘要	In this study, we identify the main modes of variability of the Normalized Difference Vegetation Index (NDVI) and their relationships with precipitation and temperature variations across northern Patagonia (36 degrees-45 degrees S). In this approach, we combined a recently developed high-resolution gridded dataset (20 x 20 km) for temperature and precipitation with a re-scaled NDVI grid to spatially match the climate database. Climate-vegetation relationships were analyzed taking into account a wide range of temporal variations (intra- to inter-annual) of both climate and NDVI. An Empirical Orthogonal Function analysis performed on NDVI delimits four regions that are spatially consistent with previous vegetation classifications for northern Patagonia. In addition, these coherent NDVI regions show similarities with the spatial precipitation patterns and the temporal evolution of precipitation over the common period 2001-2010. Both NDVI and precipitation show evident annual cycles over the Mediterranean climatic region in northwestern Patagonia. These annual cycles decrease in amplitude toward the eastern arid rangelands, and to the south on the evergreen all-year-round rainforests. Significant positive relationships between monthly precipitation and NDVI are recorded in the dry temperate rangelands in northeastern Patagonia. In contrast, direct associations between monthly NDVI and precipitation were absent in the Central Patagonia cold grasslands, where seasonal interactions between precipitation, temperature and NDVI appear to be more relevant. Relationships between NDVI and temperature are generally weaker east of the Andes, but significantly positive in late winter/spring over the temperate forests in western North Patagonia. Our results indicate that climate-NDVI relationships in northern Patagonia are biome specifics with the occurrence of temporal lags and precipitation-temperature interactions in the responses of vegetation to climate at some ecosystems.
英文关键词	Vegetation index Climate variations EOF Climate-vegetation relationships Northern Patagonia Spatio-temporal analysis
类型	Article
语种	英语
国家	Argentina
收录类别	SCI-E
WOS记录号	WOS:000515864600006
WOS关键词	NET PRIMARY PRODUCTION ; INTERANNUAL VARIABILITY ; FUNCTIONAL TYPES ; MONTE DESERT ; PRECIPITATION ; VEGETATION ; TEMPERATURE ; GRASSLAND ; RESPONSES ; WATER
WOS类目	Ecology
WOS研究方向	Environmental Sciences & Ecology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/314381
作者单位	1.Univ Nacl Rio Negro, Mitre 630, RA-8500 San Carlos De Bariloche, Rio Negro, Argentina; 2.Consejo Nacl Invest Cient & Tecn, Inst Argentino Nivol Glaciol & Ciencias Ambiental, Mendoza, Argentina; 3.Comis Nacl Actividades Espaciales, Cordoba, Argentina
推荐引用方式 GB/T 7714	Bianchi, Emilio,Villalba, Ricardo,Solarte, Andres. NDVI Spatio-temporal Patterns and Climatic Controls Over Northern Patagonia[J],2020,23(1):84-97.
APA	Bianchi, Emilio,Villalba, Ricardo,&Solarte, Andres.(2020).NDVI Spatio-temporal Patterns and Climatic Controls Over Northern Patagonia.ECOSYSTEMS,23(1),84-97.
MLA	Bianchi, Emilio,et al."NDVI Spatio-temporal Patterns and Climatic Controls Over Northern Patagonia".ECOSYSTEMS 23.1(2020):84-97.