Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1111/gcb.15763 |
Forests buffer against variations in precipitation | |
John C. O'Connor; Stefan C. Dekker; Arie Staal; Obbe A. Tuinenburg; Karin T. Rebel; Maria J. Santos | |
2021-07-28 | |
发表期刊 | Global Change Biology |
出版年 | 2021 |
英文摘要 | Atmospheric moisture recycling effectively increases the amount of usable water over land as the water can undergo multiple precipitation–evapotranspiration cycles. Differences in land cover and climate regulate the evapotranspiration flux. Forests can have deep roots that access groundwater facilitating transpiration throughout the dry season independent of precipitation. This stable transpiration buffers the forest against precipitation variability. However, it is not known whether the buffering effect, already modeled for tropical forests, is common to all forests globally. Here we apply a state-of-the-art Lagrangian moisture tracking model (UTrack) to study whether forest land cover in the upwind precipitationshed can lead to a reduction in monthly precipitation variability downwind. We found a significant buffering effect of forests in the precipitation variability of 10 out of 14 biomes globally. On average, if 50% of precipitation originates from forest, then we find a reduction in the coefficient of variation of monthly precipitation of 60%. We also observed that a high fraction of precipitation from non-forest land sources tends to have the opposite effect, that is, no buffering effect. The average variation of monthly precipitation was 69% higher in areas where 50% of precipitation originates from non-forest land sources in the precipitationshed. Our results emphasize the importance of land cover composition in the precipitationshed to buffer precipitation variability downwind, in particular forest cover. Understanding the influence of land cover in a precipitationshed on atmospheric moisture transport is key for evaluating an area's water-climate regulatory ecosystem services and may become increasingly important due to continued changes in land cover and climate change. |
领域 | 气候变化 ; 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/335329 |
专题 | 气候变化 资源环境科学 |
推荐引用方式 GB/T 7714 | John C. O'Connor,Stefan C. Dekker,Arie Staal,et al. Forests buffer against variations in precipitation[J]. Global Change Biology,2021. |
APA | John C. O'Connor,Stefan C. Dekker,Arie Staal,Obbe A. Tuinenburg,Karin T. Rebel,&Maria J. Santos.(2021).Forests buffer against variations in precipitation.Global Change Biology. |
MLA | John C. O'Connor,et al."Forests buffer against variations in precipitation".Global Change Biology (2021). |
条目包含的文件 | 条目无相关文件。 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。
修改评论