生理对森林蒸腾变化和趋势的影响大于物候

IF 6.3 1区地球科学 Q1 ENGINEERING, CIVIL

Journal of Hydrology Pub Date : 2025-06-03 DOI:10.1016/j.jhydrol.2025.133641

Zilong Cui , Yuan Zhang , Anzhi Wang , Wenli Fei , Lidu Shen , Jiabing Wu

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引用次数: 0

摘要

森林蒸腾(T)具有显著的时空格局。为了更准确地预测未来的气候-碳-水循环反馈，有必要更深入地了解这种变异性。T的变化受到广泛的生物和非生物因素的驱动，主要是通过植被物候和生理过程的变化。然而，植物物候学和生理学如何结合来解释森林T及其趋势的时空变异性尚不清楚。本文将年森林T分解为失水期长度（WLP）和季节最大蒸腾量（Tmax）。WLP和Tmax的乘积解释了2002 - 2021年北美和欧亚大陆大部分森林的时空变化。进一步分析发现，Tmax的年际变化比WLP的年际变化更能解释T的年际变化。Tmax变化趋势对森林T变化趋势的影响大于WLP变化趋势。这些结果表明，森林T受生态系统水平森林物候和蒸腾的共同控制，深入了解Tmax和WLP对环境和生物变化的响应将提高T时空预测的准确性。

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Physiology dominates over phenology in influencing variation and trends of forest transpiration

Forest transpiration (T) exhibits significant temporal and spatial patterns. A deeper understanding of this variability is necessary to more accurately predict future climate-carbon–water cycle feedbacks. Variations in T are driven by a wide range of biological and abiotic factors, primarily through changes in vegetation phenology and physiological processes. However, it is unclear that how plant phenology and physiology can be combined to explain forest T and the spatial–temporal variability of its trends. In this paper, annual forest T was decomposed into length of water loss period (WLP) and seasonal maximum transpiration (T_max). The product of WLP and T_max explained the spatial–temporal variation of most forests in North America and Eurasia from 2002 to 2021. Further analysis revealed that the interannual variation of T_max explains the interannual variation of T better than that of WLP. It was also found that the trend of T_max can affect the trend of forest T more than the trend of WLP. These results suggest that forest T is jointly controlled by ecosystem-level forest phenology and transpiration, and a deeper understanding of how T_max and WLP respond to environmental and biological changes will enhance the accuracy of spatial–temporal predictions of T.

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来源期刊

Journal of Hydrology 地学-地球科学综合

CiteScore

11.00

自引率

12.50%

发文量

1309

审稿时长

7.5 months

期刊介绍： The Journal of Hydrology publishes original research papers and comprehensive reviews in all the subfields of the hydrological sciences including water based management and policy issues that impact on economics and society. These comprise, but are not limited to the physical, chemical, biogeochemical, stochastic and systems aspects of surface and groundwater hydrology, hydrometeorology and hydrogeology. Relevant topics incorporating the insights and methodologies of disciplines such as climatology, water resource systems, hydraulics, agrohydrology, geomorphology, soil science, instrumentation and remote sensing, civil and environmental engineering are included. Social science perspectives on hydrological problems such as resource and ecological economics, environmental sociology, psychology and behavioural science, management and policy analysis are also invited. Multi-and interdisciplinary analyses of hydrological problems are within scope. The science published in the Journal of Hydrology is relevant to catchment scales rather than exclusively to a local scale or site.