气候变化领域集成服务门户(CCPortal): Seasonal divergence between soil water availability and atmospheric moisture recorded in intra-annual tree-ring δ18O extremes

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DOI	10.1088/1748-9326/ab9792
	Seasonal divergence between soil water availability and atmospheric moisture recorded in intra-annual tree-ring δ18O extremes
	Xu G.; Liu X.; Sun W.; Szejner P.; Zeng X.; Yoshimura K.; Trouet V.
发表日期	2020
ISSN	17489318
卷号	15 期号:9
英文摘要	Intra-annual variability of tree-ring oxygen stable isotopes (δ18O) can record seasonal climate variability and a tree's ecophysiological response to it. Variability of sub-annual tree-ring δ18O maxima and minima, which usually occur in different parts of the growing season, may exhibit different climatic signals and can help in understanding past seasonal moisture conditions, especially in Asian monsoon areas. We developed minimum and maximum tree-ring δ18O series based on sub-annual tree-ring δ18O measurements of Pinus massoniana at a humid site in southeastern China. We found that interannual variability in minimum tree-ring δ18O is primarily controlled by the July-September soil water supply and source water δ18O, whereas the maximum latewood tree-ring δ18O is primarily controlled by the relative humidity (RH) in October. The maximum of variability of earlywood tree-ring δ18O records the RH of October of the previous year. We used minimum and maximum tree-ring δ18O to develop two reconstructions (1900-2014) of seasonal moisture availability. The summer soil water supply (July-September self-calibrated Palmer drought severity index) and the RH in fall show contrasting trends, which may be related to late-growing seasonal warming leading to a high vapor capacity and high atmospheric moisture. Our findings are valuable for research that aims to explore seasonal moisture changes under anthropogenic climate change and the ecological implications of such contrasting trends. © 2020 Institute of Physics Publishing. All rights reserved.
英文关键词	High-resolution dendroisotopes; Maximum and minimum; Relative humidity; Source water; Tree-ring oxygen isotope; Water availability
语种	英语
scopus关键词	Atmospheric humidity; Climate change; Humidity control; Soil moisture; Water supply; Anthropogenic climate changes; Atmospheric moisture; Interannual variability; Intra-annual variability; Moisture conditions; Oxygen stable isotopes; Self-calibrated palmer drought severity indices; Soil water availability; Forestry; ecophysiology; extreme event; growing season; monsoon; oxygen isotope; relative humidity; seasonality; soil moisture; soil water; tree ring; China; Pinus massoniana
来源期刊	Environmental Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/153806
作者单位	State Key Laboratory of Cryospheric Sciences, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou, 730000, China; Laboratory of Tree-Ring Research, University of Arizona, Tucson, AZ 85721, United States; School of Geography and Tourism, Shaanxi Normal University, Xi'an710119, China; Instituto de Geologiá, Universidad Nacional Autónoma de México, Mexico City, 04510, Mexico; Department of Human and Social Systems, University of Tokyo, Chiba, 2778574, Japan
推荐引用方式 GB/T 7714	Xu G.,Liu X.,Sun W.,et al. Seasonal divergence between soil water availability and atmospheric moisture recorded in intra-annual tree-ring δ18O extremes[J],2020,15(9).
APA	Xu G..,Liu X..,Sun W..,Szejner P..,Zeng X..,...&Trouet V..(2020).Seasonal divergence between soil water availability and atmospheric moisture recorded in intra-annual tree-ring δ18O extremes.Environmental Research Letters,15(9).
MLA	Xu G.,et al."Seasonal divergence between soil water availability and atmospheric moisture recorded in intra-annual tree-ring δ18O extremes".Environmental Research Letters 15.9(2020).