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Negative Asymmetric Response of Pantropical Gross Primary Productivity to Precipitation Anomalies

文献类型：期刊论文

作者Fan, Lei2,3; Dong, Guanyu2,3; Ciais, Philippe4; Xiao, Xiangming5; Xiao, Jingfeng6; Chen, Xiuzhi1; Luo, Yiqi7; Niu, Shuli8; Jiang, Fei9; Frappart, Frederic10
刊名EARTHS FUTURE
出版日期2024-10-01
卷号12期号:10页码:20
关键词tropical carbon cycle climate extremes vegetation productivity non-linear response
DOI10.1029/2024EF004760
产权排序8
英文摘要The carbon sink in pantropical biomes play a crucial role in modulating the inter-annual variations of global terrestrial carbon balance and is threatened by extreme climate events. However, it has not been carefully examined whether an increase in tropical gross primary productivity (GPP) can compensate the decrease during precipitation anomalies. Using the asymmetry index (AI) and multiple GPP products, we assessed responses of pantropical GPP to precipitation anomalies during 2001-2022. Positive AI indicates that GPP increases are greater than GPP decreases during precipitation anomalies, and vice versa. Our results showed an average negative pantropical GPP asymmetry, that is, GPP decreases exceeded the GPP increases during precipitation anomalies. In addition, a positive AI was found in tropical hyper-arid and arid regions, which is opposite to the negative AI observed in tropical semi-arid, sub-humid, and humid regions. This suggest that tropical GPP asymmetry changes from positive to negative as the moisture increases. Notably, a significant decreasing trend of negative AI was observed over the entire tropical region, indicating that the negative effect of inter-annual precipitation variations on pantropical vegetation productivity has enhanced. Considering the model predicted increasing climate variability and extremes, the negative impact of precipitation variability on tropical carbon cycle may continue to intensify. Lastly, the divergence in AI estimates among multiple GPP products highlight the need to further improve our understanding of the response of tropical carbon cycle to climate changes, especially for the tropical humid regions. Tropical biomes play an essential role in controlling the global carbon balance but has been threatened by extreme climate events recently. Whether the increase in tropical GPP can compensate the GPP decrease during precipitation anomalies is still poorly known. In this study, we found an average negative asymmetric GPP response to precipitation anomalies over the entire tropics during 2001-2022, that is, GPP decreases exceeded the GPP increases during precipitation anomalies. Meanwhile, we found that the tropical GPP was shifted from positive asymmetry to negative asymmetry as the moisture increases. Besides, a significantly decreasing trend of GPP asymmetry was observed over the study period, suggesting that the negative effect of inter-annual precipitation variations on pantropical GPP has intensified. We find the tropical GPP shows a negative asymmetric response to precipitation anomalies over the past two decades An overall decreasing trend of the GPP asymmetry was observed over the entire tropical region Anisohydric biomes have a stronger positive asymmetric response of GPP to precipitation anomalies than isohydric biomes
WOS关键词SEMIARID ECOSYSTEMS ; CARBON FLUXES ; TIME-SCALES ; VEGETATION ; DROUGHT ; TEMPERATURE ; MORTALITY ; NETWORK ; EVENTS ; GROWTH
资助项目National Natural Science Foundation of China[42322103] ; National Natural Science Foundation of China[42171339] ; Special fund for youth team of Southwest University[SWU-XJLJ202305] ; Chongqing Outstanding Youth Science Foundation[CSTB2024NSCQ-JQX0010] ; Chongqing Talents Program[cstc2024ycjh-bgzxm0124]
WOS研究方向Environmental Sciences & Ecology ; Geology ; Meteorology & Atmospheric Sciences
语种英语
WOS记录号WOS:001330933500001
出版者AMER GEOPHYSICAL UNION
资助机构National Natural Science Foundation of China ; Special fund for youth team of Southwest University ; Chongqing Outstanding Youth Science Foundation ; Chongqing Talents Program
源URL[http://ir.igsnrr.ac.cn/handle/311030/209943]  
专题生态系统网络观测与模拟院重点实验室_外文论文
通讯作者Dong, Guanyu
作者单位1.Sun Yat Sen Univ, Sch Atmospher Sci, Zhuhai, Peoples R China
2.Southwest Univ, Sch Geog Sci, Chongqing Jinfo Mt Karst Ecosyst Natl Observat & R, Chongqing, Peoples R China
3.Southwest Univ, Chongqing Engn Res Ctr Remote Sensing Big Data App, Sch Geog Sci, Chongqing, Peoples R China
4.Univ Paris Saclay, Lab Sci Climat & Environm, CEA CNRS UVSQ, Gif Sur Yvette, France
5.Univ Oklahoma, Ctr Earth Observat & Modeling, Dept Microbiol & Plant Biol, Norman, OK USA
6.Univ New Hampshire, Earth Syst Res Ctr, Inst Study Earth Oceans & Space, Durham, NH USA
7.Univ Oklahoma, Dept Microbiol & Plant Biol, Norman, OK USA
8.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Ecosyst Network Observat & Modeling, Beijing, Peoples R China
9.Nanjing Univ, Int Inst Earth Syst Sci, Nanjing, Peoples R China
10.Univ Bordeaux, INRAE, Bordeaux, France
推荐引用方式
GB/T 7714		 Fan, Lei,Dong, Guanyu,Ciais, Philippe,et al. Negative Asymmetric Response of Pantropical Gross Primary Productivity to Precipitation Anomalies[J]. EARTHS FUTURE,2024,12(10):20.
APA Fan, Lei.,Dong, Guanyu.,Ciais, Philippe.,Xiao, Xiangming.,Xiao, Jingfeng.,...&Fensholt, Rasmus.(2024).Negative Asymmetric Response of Pantropical Gross Primary Productivity to Precipitation Anomalies.EARTHS FUTURE,12(10),20.
MLA Fan, Lei,et al."Negative Asymmetric Response of Pantropical Gross Primary Productivity to Precipitation Anomalies".EARTHS FUTURE 12.10(2024):20.

入库方式： OAI收割

来源：地理科学与资源研究所

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