Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1088/1748-9326/aab0b1 |
Higher absorbed solar radiation partly offset the negative effects of water stress on the photosynthesis of Amazon forests during the 2015 drought | |
Li, Xing1,2; Xiao, Jingfeng2; He, Binbin1,3 | |
2018-04-01 | |
发表期刊 | ENVIRONMENTAL RESEARCH LETTERS |
ISSN | 1748-9326 |
出版年 | 2018 |
卷号 | 13期号:4 |
文章类型 | Article |
语种 | 英语 |
国家 | Peoples R China; USA |
英文摘要 | Amazon forests play an important role in the global carbon cycle and Earth's climate. The vulnerability of Amazon forests to drought remains highly controversial. Here we examine the impacts of the 2015 drought on the photosynthesis of Amazon forests to understand how solar radiation and precipitation jointly control forest photosynthesis during the severe drought. We use a variety of gridded vegetation and climate datasets, including solar-induced chlorophyll fluorescence (SIF), photosynthetic active radiation (PAR), the fraction of absorbed PAR (APAR), leaf area index (LAI), precipitation, soil moisture, cloud cover, and vapor pressure deficit (VPD) in our analysis. Satellite-derived SIF observations provide a direct diagnosis of plant photosynthesis from space. The decomposition of SIF to SIF yield (SIFyield) and APAR (the product of PAR and fPAR) reveals the relative effects of precipitation and solar radiation on photosynthesis. We found that the drought significantly reduced SIFyield, the emitted SIF per photon absorbed. The higher APAR resulting from lower cloud cover and higher LAI partly offset the negative effects of water stress on the photosynthesis of Amazon forests, leading to a smaller reduction in SIF than in SIFyield and precipitation. We further found that SIFyield anomalies were more sensitive to precipitation and VPD anomalies in the southern regions of the Amazon than in the central and northern regions. Our findings shed light on the relative and combined effects of precipitation and solar radiation on photosynthesis, and can improve our understanding of the responses of Amazon forests to drought. |
英文关键词 | solar-induced chlorophyll fluorescence drought Amazon rainforests solar radiation water stress photosynthesis |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000434852000001 |
WOS关键词 | TERRESTRIAL CHLOROPHYLL FLUORESCENCE ; RAIN-FOREST ; SATELLITE MEASUREMENTS ; CARBON DYNAMICS ; DRY SEASON ; LEAF-AREA ; GREEN-UP ; MODIS ; PHENOLOGY ; PRODUCTS |
WOS类目 | Environmental Sciences ; Meteorology & Atmospheric Sciences |
WOS研究方向 | Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/30973 |
专题 | 气候变化 |
作者单位 | 1.Univ Elect Sci & Technol China, Sch Resources & Environm, 2006 Xiyuan Ave,West Hitech Zone, Chengdu 611731, Sichuan, Peoples R China; 2.Univ New Hampshire, Inst Study Earth Oceans & Space, Earth Syst Res Ctr, Durham, NH 03824 USA; 3.Univ Elect Sci & Technol China, Ctr Informat Geosci, 2006 Xiyuan Ave, Chengdu 611731, Sichuan, Peoples R China |
推荐引用方式 GB/T 7714 | Li, Xing,Xiao, Jingfeng,He, Binbin. Higher absorbed solar radiation partly offset the negative effects of water stress on the photosynthesis of Amazon forests during the 2015 drought[J]. ENVIRONMENTAL RESEARCH LETTERS,2018,13(4). |
APA | Li, Xing,Xiao, Jingfeng,&He, Binbin.(2018).Higher absorbed solar radiation partly offset the negative effects of water stress on the photosynthesis of Amazon forests during the 2015 drought.ENVIRONMENTAL RESEARCH LETTERS,13(4). |
MLA | Li, Xing,et al."Higher absorbed solar radiation partly offset the negative effects of water stress on the photosynthesis of Amazon forests during the 2015 drought".ENVIRONMENTAL RESEARCH LETTERS 13.4(2018). |
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