Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2021WR030319 |
Climate rather than Vegetation Changes Dominate Changes in Effective Vegetation Available Water Capacity | |
Meixian Liu; Baoqing Zhang; Xiaogang He | |
2022-02-11 | |
发表期刊 | Water Resources Research
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出版年 | 2022 |
英文摘要 | China has experienced significant vegetation greening over recent decades. Vegetation greening may regulate the effective vegetation available water capacity (EVAWC), which determines the root zone water ability for evapotranspiration. EVAWC is one of the most important factors controlling vegetation growth and ecosystem resilience. Despite its importance, quantifying EVAWC at large scale is challenging due to limited observations of soil properties and insufficient understanding of underlying physical processes. Thus, to what extent changes in EVAWC are driven by vegetation and climate change is still unclear, especially in a changing environment. Here we establish a physics-based, data-driven stochastic approach to examine the spatiotemporal variability of the EVAWC and its potential drivers over China, with the consideration of vegetation and climate dynamics. The major strength of our approach is that it does not require observations related to soil properties as inputs, but only needs a few simple hydrometeorological and remotely sensed vegetation parameters that can be easily obtained. On average, we find that vegetation changes tend to increase EVAWC over 71.0 ± 3.9% of the total land area in China, while climate variabilities tend to reduce EVAWC over 73.7 ± 9.5% of the land area. More importantly, the potential increase in EVAWC resulting from vegetation changes is offset by climate variability. As a result, the changes in EVAWC over recent decades are generally dominated by climate variabilities (relative contribution of 82.7 ± 9.6%) rather than vegetation changes, especially in humid and semi-humid areas. Our results suggest that vegetation greening in China has subordinate impacts on EVAWC, and ecosystem resilience is mainly dominated by the local climate. This article is protected by copyright. All rights reserved. |
领域 | 资源环境 |
URL | 查看原文 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/346735 |
专题 | 资源环境科学 |
推荐引用方式 GB/T 7714 | Meixian Liu,Baoqing Zhang,Xiaogang He. Climate rather than Vegetation Changes Dominate Changes in Effective Vegetation Available Water Capacity[J]. Water Resources Research,2022. |
APA | Meixian Liu,Baoqing Zhang,&Xiaogang He.(2022).Climate rather than Vegetation Changes Dominate Changes in Effective Vegetation Available Water Capacity.Water Resources Research. |
MLA | Meixian Liu,et al."Climate rather than Vegetation Changes Dominate Changes in Effective Vegetation Available Water Capacity".Water Resources Research (2022). |
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