Knowledge Resource Center for Ecological Environment in Arid Area
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
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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). |
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