Evapotranspiration dominates vegetation cooling in drylands under hydrological limitations
文献类型：期刊论文
| 作者 | Wang, Ke1,3; Zhao, Dongsheng3; Chen, Ziwei1,2,3; Zheng, Du1,3 |
| 刊名 | JOURNAL OF HYDROLOGY
 |
| 出版日期 | 2026-04-01 |
| 卷号 | 668页码:134988 |
| 关键词 | Vegetation change Biophysical feedback Evapotranspiration Albedo Drylands |
| ISSN号 | 0022-1694 |
| DOI | 10.1016/j.jhydrol.2026.134988 |
| 产权排序 | 1 |
| 文献子类 | Article |
| 英文摘要 | In drylands, vegetation alters land surface temperature (LST) through two opposing mechanisms, which include evapotranspiration (ET) -driven cooling and albedo-induced warming. However, the dominant pathway of this biophysical feedback remains uncertain in water-limited ecosystems. Using satellite observations and the intrinsic biophysical mechanism method, we quantified vegetation-induced temperature changes across global drylands from 2001 to 2021. Results showed that vegetation increase led to a net cooling effect (Delta Ts = -0.44 +/- 0.14 K), which was overwhelmingly dominated by ET (Delta Tsf = -0.45 +/- 0.14 K), while albedo-induced warming was minimal (Delta Tsa = 0.008 +/- 0.004 K). The magnitude of ET cooling is highly sensitive to water availability, diminishing significantly when soil moisture (SM) fell below 0.15 m3/m3 and vapor pressure deficit (VPD) exceeded 1.8 kPa. Furthermore, vegetation-induced cooling intensified over time in tropical, arid, and temperate zones within global drylands, with Delta Ts declining at rates of -0.01 to -0.02 K yr- 1. While acknowledging the empirical properties of the regression and the offline assumption of the intrinsic biophysical mechanism method (which does not account for atmospheric feedbacks), our results demonstrate that ET-driven cooling dominates the biophysical cooling effect in drylands. These results provide critical insights for land-management policies aimed at reducing heat stress and ecosystem risk in drylands. Specifically, conserving vegetation in semi-arid and dry sub-humid zones may provide potential for sustained temperature regulation under appropriate management, while vegetation restoration in hyper-arid regions is unlikely to yield long-term biophysical cooling benefits due to inherent water limitations. |
| URL标识 | 查看原文 |
| WOS关键词 | SURFACE-TEMPERATURE ; CLIMATE-CHANGE ; FEEDBACKS ; AFFORESTATION ; CHINA ; DEFORESTATION ; FORESTATION ; MITIGATION ; INCREASE ; PLATEAU |
| WOS研究方向 | Engineering ; Geology ; Water Resources |
| 语种 | 英语 |
| WOS记录号 | WOS:001679192200003 |
| 出版者 | ELSEVIER |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/220957]  |
| 专题 | 陆地表层格局与模拟院重点实验室_外文论文 |
| 通讯作者 | Zhao, Dongsheng |
| 作者单位 | 1.Univ Chinese Acad Sci, Coll Resources & Environm, Beijing 100049, Peoples R China; 2.Fujian Agr & Forestry Univ, Univ Key Lab Soil Ecosyst Hlth & Regulat Fujian, Coll Resources & Environm, Fuzhou 350002, Fujian, Peoples R China 3.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Land Surface Pattern & Simulat, Beijing 100101, Peoples R China; |
| 推荐引用方式 GB/T 7714 | Wang, Ke,Zhao, Dongsheng,Chen, Ziwei,et al. Evapotranspiration dominates vegetation cooling in drylands under hydrological limitations[J]. JOURNAL OF HYDROLOGY,2026,668:134988. |
| APA | Wang, Ke,Zhao, Dongsheng,Chen, Ziwei,&Zheng, Du.(2026).Evapotranspiration dominates vegetation cooling in drylands under hydrological limitations.JOURNAL OF HYDROLOGY,668,134988. |
| MLA | Wang, Ke,et al."Evapotranspiration dominates vegetation cooling in drylands under hydrological limitations".JOURNAL OF HYDROLOGY 668(2026):134988. |
入库方式： OAI收割
来源：地理科学与资源研究所
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