Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2020WR027102 |
Why is the Terrestrial Water Storage in Dryland Regions Declining? A Perspective based on GRACE Satellite Observations and Noah‐MP Model Simulations | |
Li‐; Ling Chang; Ruiqiang Yuan; Hoshin V. Gupta; C. L. Winter; Guo‐; Yue Niu | |
2020-10-29 | |
发表期刊 | Water Resources Research
![]() |
出版年 | 2020 |
英文摘要 | Drylands cover over 40% of the global land area and are home to more than 2 billion humans. Here, we use the terrestrial water storage (TWS) anomaly data derived from GRACE satellites to assess water storage changes globally, and find that drylands lost ~15.9 ± 9.1 mm of water between April 2002 and January 2017. The TWS trends are more significant and apparent in dry regions than in humid regions. The decrease in TWS occurred mainly in hyper‐arid and arid regions. Exact causes to the observed declines in TWS remain elusive due to anthropogenic water withdrawals, atmospheric demand (potential evapotranspiration, PET) in contrast to supply (precipitation, P) caused by the warming, and terrestrial ecohydrological responses. Therefore, we use a process‐based model forced by climate data to interpret the causes over three selected dryland regions showing the strongest drying trends. We find that the modeled TWS without considering anthropogenic water withdrawals explains most of the declining GRACE TWS over the Southwestern North America (NA) and Middle East but underestimates the drying trend over North China. This suggests that TWS declines in the Southwestern NA and the Middle East were primarily driven by the contrast between atmospheric demand and supply, whereas anthropogenic water withdrawals may have played a relatively more dominant role in TWS declines over North China. Additional model experiments indicate that terrestrial ecohydrological processes that help extract deep substrate water are critical for providing water supply additional to precipitation to sustain ET in the drying drylands at decadal scales. |
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/301867 |
专题 | 资源环境科学 |
推荐引用方式 GB/T 7714 | Li‐,Ling Chang,Ruiqiang Yuan,等. Why is the Terrestrial Water Storage in Dryland Regions Declining? A Perspective based on GRACE Satellite Observations and Noah‐MP Model Simulations[J]. Water Resources Research,2020. |
APA | Li‐.,Ling Chang.,Ruiqiang Yuan.,Hoshin V. Gupta.,C. L. Winter.,...&Yue Niu.(2020).Why is the Terrestrial Water Storage in Dryland Regions Declining? A Perspective based on GRACE Satellite Observations and Noah‐MP Model Simulations.Water Resources Research. |
MLA | Li‐,et al."Why is the Terrestrial Water Storage in Dryland Regions Declining? A Perspective based on GRACE Satellite Observations and Noah‐MP Model Simulations".Water Resources Research (2020). |
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