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Early leaf senescence under drought conditions in the Northern hemisphere

文献类型：期刊论文

作者Ma, Chunyue3; Wang, Xiaoyue3; Wu, Chaoyang2,3
刊名AGRICULTURAL AND FOREST METEOROLOGY
出版日期2024-11-15
卷号358页码:110231
关键词Autumn foliar senescence Phenology model Drought Future projections
DOI10.1016/j.agrformet.2024.110231
产权排序1
文献子类Article
英文摘要Changes in the dates of autumn foliar senescence (DFS) have significant impacts on regional carbon uptake, while current approaches for the estimation of DFS are still lacking. The most important issue is that there are complicated factors that affect the DFS, among which drought effects probably have contributed the most. Using long-term DFS observations derived from the third-generation normalized difference vegetation index dataset (NDVI3g), we found a wider spread of earlier DFS trends over the Northern Hemisphere from 1999 to 2015, three times larger than that from 1982 to 1998. The five multivariate analysis of variance approaches consistently suggest the key role of drought in regulating these changes. We therefore derived a new DFS algorithm with the standardized precipitation evapotranspiration index (SPEI) to characterize these drought effects, and validations from both NDVI3g and MODIS data demonstrated that our new algorithm provided significantly improved estimates of DFS for all plant functional types, with higher accuracy for water-limited ecosystems. We further applied this new algorithm to predict DFS under various shared socioeconomic pathways (SSPs) by the end of this century, and we found overall earlier DFS than the current expectations. Our results therefore highlight the importance of drought in the modeling of plant phenology using remote sensing observations and thus are highly important for understanding the relationships between land carbon sinks and climate change, especially given that droughts are projected to be more severe and frequent in the future.
WOS关键词GROWING-SEASON LENGTH ; CLIMATE-CHANGE ; AUTUMN PHENOLOGY ; SPRING PHENOLOGY ; RESPONSES ; PRODUCTIVITY ; MODEL ; EVAPOTRANSPIRATION ; PRECIPITATION ; FEEDBACKS
WOS研究方向Agriculture ; Forestry ; Meteorology & Atmospheric Sciences
WOS记录号WOS:001320558400001
源URL[http://ir.igsnrr.ac.cn/handle/311030/207912]  
专题陆地表层格局与模拟院重点实验室_外文论文
通讯作者Wang, Xiaoyue
作者单位1.Henan Univ, Coll Geog & Environm Sci, Kaifeng 475004, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Land Surface Pattern & Simulat, Beijing 100101, Peoples R China
推荐引用方式
GB/T 7714		 Ma, Chunyue,Wang, Xiaoyue,Wu, Chaoyang. Early leaf senescence under drought conditions in the Northern hemisphere[J]. AGRICULTURAL AND FOREST METEOROLOGY,2024,358:110231.
APA Ma, Chunyue,Wang, Xiaoyue,&Wu, Chaoyang.(2024).Early leaf senescence under drought conditions in the Northern hemisphere.AGRICULTURAL AND FOREST METEOROLOGY,358,110231.
MLA Ma, Chunyue,et al."Early leaf senescence under drought conditions in the Northern hemisphere".AGRICULTURAL AND FOREST METEOROLOGY 358(2024):110231.

入库方式： OAI收割

来源：地理科学与资源研究所

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