气候变化领域集成服务门户(CCPortal): Decreasing rainfall frequency contributes to earlier leaf onset in northern ecosystems

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DOI	10.1038/s41558-022-01285-w
	Decreasing rainfall frequency contributes to earlier leaf onset in northern ecosystems
	Wang J.; Liu D.; Ciais P.; Peñuelas J.
发表日期	2022
ISSN	1758-678X
起始页码	386
结束页码	392
卷号	12 期号:4
英文摘要	Climate change substantially advances the leaf onset date (LOD) and regulates carbon uptake by plants. Unlike temperature, the effect of precipitation remains largely elusive. Here we use carbon-flux measurements, in situ records of leaf unfolding and satellite greenness observations to examine the role of precipitation frequency (Pfreq, number of rainy days) in controlling the LOD in northern ecosystems (>30° N). Widespread decreases in Pfreq during the past three decades positively contributed to the advance in LOD, possibly due to increased exposure to radiation, exhibiting a dominant control of LOD over ~10% of the area. Lower Pfreq may also enhance chilling at night and warming at daytime, consequently leading to earlier LOD. We further develop a weighted precipitation growing-degree-day algorithm that projected a generally earlier LOD than currently predicted. These results highlight the need for a comprehensive understanding of the impacts of precipitation on LOD, which is necessary for improved projections. © 2022, The Author(s), under exclusive licence to Springer Nature Limited.
语种	英语
scopus关键词	algorithm; carbon flux; climate change; frequency analysis; rainfall; satellite altimetry
来源期刊	Nature Climate Change
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/256727
作者单位	Department of Geography, The Ohio State University, Columbus, OH, United States; Laboratoire des Sciences du Climat et de l’Environnement, IPSL-LSCE CEA CNRS UVSQ, Gif-sur-Yvette, France; CSIC, Global Ecology Unit CREAF-CSIC-UAB, Bellaterra, Barcelona, Spain; CREAF, Cerdanyola del Valles, Barcelona, Spain
推荐引用方式 GB/T 7714	Wang J.,Liu D.,Ciais P.,et al. Decreasing rainfall frequency contributes to earlier leaf onset in northern ecosystems[J],2022,12(4).
APA	Wang J.,Liu D.,Ciais P.,&Peñuelas J..(2022).Decreasing rainfall frequency contributes to earlier leaf onset in northern ecosystems.Nature Climate Change,12(4).
MLA	Wang J.,et al."Decreasing rainfall frequency contributes to earlier leaf onset in northern ecosystems".Nature Climate Change 12.4(2022).