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DOI	10.1016/j.jag.2018.11.013
	GIMMS NDVI time series reveal the extent, duration, and intensity of “blooming desert” events in the hyper-arid Atacama Desert, Northern Chile
	Chávez R.O.; Moreira-Muñoz A.; Galleguillos M.; Olea M.; Aguayo J.; Latín A.; Aguilera-Betti I.; Muñoz A.A.; Manríquez H.
发表日期	2019
ISSN	15698432
起始页码	193
结束页码	203
卷号	76
英文摘要	The “blooming desert”, or the explosive development and flowering of ephemeral herbaceous and some woody desert species during years with abnormally high accumulated rainfall, is a spectacular biological phenomenon of the hyper-arid Atacama Desert (northern Chile) attracting botanists, ecologists, geo-scientists, and the general public from all over the world. However, the number of “blooming deserts”, their geographical distribution and spatio-temporal patterns have not been quantitatively assessed to date. Here, we used NDVI data from the Global Inventory Modeling and Mapping Studies (GIMMS) project to reconstruct the annual land surface phenology (LSP) of the Atacama Desert using a non-parametric statistical approach. From the reconstructed LSP, we detected the “blooming deserts” as positive NDVI anomalies and assessed three dimensions of the events: their temporal extent, intensity of “greening” and spatial extent. We identified 13 “blooming deserts” between 1981 and 2015, of which three (1997–98, 2002–03, and 2011) can be considered major events according to these metrics. The main event occurred in 2011, spanning 180 days between July and December 2011, and spread over 11,136 km 2 of Atacama dry plains. “Blooming deserts” in Atacama have been triggered by the accumulation of precipitation during a period of 2 to 12 months before and during the events. The proposed three-dimensional approach allowed us to characterize different types of “blooming deserts”: with longer episodes or larger spatial distribution or with different “greening” intensities. Its flexibility to reconstruct different LSP and detect anomalies makes this method a useful tool to study these rare phenomena in other deserts in the world also. © 2018 Elsevier B.V.
英文关键词	Ephemeral vegetation; Extreme events; Land surface phenology; npphen; Precipitation variability; Remote sensing; Time series
语种	英语
scopus关键词	desert; extreme event; land surface; numerical model; phenology; precipitation intensity; remote sensing; time series; vegetation mapping; Atacama Desert; Chile
来源期刊	International Journal of Applied Earth Observation and Geoinformation
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/156519
作者单位	Pontificia Universidad Católica de Valparaíso, Instituto de Geografía, Valparaíso, Chile; Universidad Austral de Chile, Centro Transdisciplinario de Estudios Ambientales y Desarrollo Humano Sostenible (CEAM), Valdivia, Chile; Universidad de Chile, Facultad de Ciencias Agronómicas Santiago, Chile; Center for Climate Resilience Research (CR)2, University of Chile, Santiago, 8370449, Chile
推荐引用方式 GB/T 7714	Chávez R.O.,Moreira-Muñoz A.,Galleguillos M.,等. GIMMS NDVI time series reveal the extent, duration, and intensity of “blooming desert” events in the hyper-arid Atacama Desert, Northern Chile[J],2019,76.
APA	Chávez R.O..,Moreira-Muñoz A..,Galleguillos M..,Olea M..,Aguayo J..,...&Manríquez H..(2019).GIMMS NDVI time series reveal the extent, duration, and intensity of “blooming desert” events in the hyper-arid Atacama Desert, Northern Chile.International Journal of Applied Earth Observation and Geoinformation,76.
MLA	Chávez R.O.,et al."GIMMS NDVI time series reveal the extent, duration, and intensity of “blooming desert” events in the hyper-arid Atacama Desert, Northern Chile".International Journal of Applied Earth Observation and Geoinformation 76(2019).