太阳诱导的叶绿素荧光对干旱非常敏感

2021 IEEE International Geoscience and Remote Sensing Symposium IGARSS Pub Date : 2021-07-11 DOI:10.1109/IGARSS47720.2021.9553404

Ruonan Qiu, Ge Han, Xin Ma, Wei Gong

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引用次数: 0

摘要

持续干旱可导致植被死亡和陆地生态系统碳汇能力降低。然而，干旱原因和过程的复杂性导致对干旱下植被表现的理解有限。利用太阳诱导叶绿素荧光(SIF)和增强植被指数(EVI)数据，探讨了2012年美国中西部干旱对植被的影响。在整个研究区和通量塔尺度上，SIF对降水减少的敏感性高于EVI。SIF还可以更准确地监测干旱条件下植被的生长情况。SIF是监测植被环境胁迫的有效指标。

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Solar-Induced Chlorophyll Fluorescence is Very Sensitive to Drought

Continued drought can lead to vegetation mortality and reduced carbon sink capacity of terrestrial ecosystems. However, the complexity of the causes and processes of drought has led to a limited understanding of how vegetation performances under drought. Here we used solar-induced chlorophyll fluorescence (SIF) and enhanced vegetation index (EVI) data to explore the impact of U.S Midwest drought on vegetation in 2012. At the whole study area and flux tower scale, SIF is more sensitive to the decrease in precipitation than EVI. SIF also can more accurately monitor the growth of vegetation under drought. SIF is an effective index for monitoring environmental stress on vegetation.

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来源期刊

2021 IEEE International Geoscience and Remote Sensing Symposium IGARSS

CiteScore

1.20

自引率

0.00%

发文量