干旱区生态环境知识资源中心(Arid): Hydrothermal modulation of NDVI in the high-altitude semiarid Andes of Chile (30-34 degrees S)

Arid

DOI	10.1016/j.jaridenv.2020.104397
	Hydrothermal modulation of NDVI in the high-altitude semiarid Andes of Chile (30-34 degrees S)
	Rudloff, Valeria M.; Rutllant, Jose A.; Martel-Cea, Alejandra; Maldonado, Antonio
通讯作者	Rudloff, VM (corresponding author), Ctr Adv Studies Arid Zones CEAZA, La Serena, Chile.
来源期刊	JOURNAL OF ARID ENVIRONMENTS
ISSN	0140-1963
EISSN	1095-922X
出版年	2021
卷号	186
英文摘要	The impact of future climate change on the native vegetation of subtropical Andes is relatively unknown. The semiarid region of north-central Chile (30-34 degrees S) has experienced a mega-drought over the last decade, with a partial recovery during the 2015 El Nino year. To characterize the vegetation response to climate variability, we analyzed the seasonal precipitation, potential evapotranspiration, temperature extremes, and high-resolution normalized difference vegetation index (NDVI) data at five altitudinal floors above 2500 m. We considered the bi-monthly maximum NDVI in austral summer (NDVIx) and the difference between NDVIx and that of two months prior (NDVId) to reflect the primary productivity throughout the growing season. We observed positive linear correlations between NDVIx and winter precipitation and negative ones with autumn/winter maximum temperatures at lower altitudes (the latter likely led to the negative correlation between NDVIx and potential evapotranspiration). The NDVIx showed clear latitudinal and altitudinal variability, with the southern region exhibiting an opposite NDVIx climate correlation pattern at altitudes greater than 3500 m. The NDVId correlations were more spatially uniform and showed similar patterns to those of NDVIx at lower altitudes. Precipitation declined at a rate of-45%/decade, which contributed to the -1.5%/decade and -5%/decade decline in NDVIx and NDVId, respectively. The positive NDVIx trends (1.5%/decade) above 3500 m in the southern region led to an early snowpack retreat, which was consistent with the temporal increase in autumn maximum temperature of 1.23 degrees C/decade. Our results suggest that ongoing climate change will have a negative impact on the high-altitude ecosystems of the semiarid Andes.
英文关键词	Normalized difference vegetation index (NDVI) Precipitation Temperature Semiarid vegetation Subtropical Andes Central Chile
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000611829200009
WOS关键词	PHENOLOGICAL PATTERNS ; RAINFALL VARIABILITY ; CLIMATE-CHANGE ; ELEVATION ; RESISTANCE ; VEGETATION ; SURFACE ; DESERT ; PRODUCTIVITY ; INCREASE
WOS类目	Ecology ; Environmental Sciences
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/2XILL650/350677
作者单位	[Rudloff, Valeria M.; Rutllant, Jose A.; Maldonado, Antonio] Ctr Adv Studies Arid Zones CEAZA, La Serena, Chile; [Rutllant, Jose A.] Univ Chile, Dept Geophys, Santiago, Chile; [Martel-Cea, Alejandra] Univ Austral Chile, Fac Ciencias Forestales & Recursos Nat, Escuela Graduados, Valdivia, Chile; [Martel-Cea, Alejandra] Univ Austral Chile, Inst Ciencias Tierra, Valdivia, Chile; [Maldonado, Antonio] Univ La Serena, Inst Invest Multidisciplinario Ciencia & Tecnol, La Serena, Chile; [Maldonado, Antonio] Univ Catolica Norte, Dept Biol Marina, Coquimbo, Chile; [Rudloff, Valeria M.] REDLAMA Latinamer Educ Network Environm, Santiago, Chile
推荐引用方式 GB/T 7714	Rudloff, Valeria M.,Rutllant, Jose A.,Martel-Cea, Alejandra,et al. Hydrothermal modulation of NDVI in the high-altitude semiarid Andes of Chile (30-34 degrees S)[J],2021,186.
APA	Rudloff, Valeria M.,Rutllant, Jose A.,Martel-Cea, Alejandra,&Maldonado, Antonio.(2021).Hydrothermal modulation of NDVI in the high-altitude semiarid Andes of Chile (30-34 degrees S).JOURNAL OF ARID ENVIRONMENTS,186.
MLA	Rudloff, Valeria M.,et al."Hydrothermal modulation of NDVI in the high-altitude semiarid Andes of Chile (30-34 degrees S)".JOURNAL OF ARID ENVIRONMENTS 186(2021).