Dynamic conversion coefficients improve alpine lake daily evaporation estimation based on multi-evaporator observations
文献类型：期刊论文
| 作者 | Zhang, Fang2,3; Li, Xiang1; Zhang, Xueqin3; Zheng, Du3 |
| 刊名 | JOURNAL OF HYDROLOGY
 |
| 出版日期 | 2026-06-01 |
| 卷号 | 672页码:135333 |
| 关键词 | Evaporation conversion coefficient Lake-air temperature difference Multiple evaporators Lake surface evaporation Random forest regression model Yamzhog Yumco |
| ISSN号 | 0022-1694 |
| DOI | 10.1016/j.jhydrol.2026.135333 |
| 产权排序 | 1 |
| 文献子类 | Article |
| 英文摘要 | Estimating lake surface evaporation (LSE), a major component of lake water and energy balances, is essential for science-informed water resources management of alpine lakes on the Tibetan Plateau with global warming. However, sparse hydrometeorological observations and uncertainties in local model parameterization hinder reliable LSE estimation, particularly during ice-covered periods. Based on multiple-evaporator observations (i.e., 20 cm pan evaporation: E-20cm; E601 pan evaporation: E-E601; and 20 m2 tank evaporation: E-20m2 , regarding actual LSE), we estimate daily LSE using a refined pan conversion method with dynamic conversion coefficients from 2009 to 2023 in Yamzhog Yumco, South Tibet. Meteorological controls on daily LSE variability are further quantified using a random forest regression model. Results show that LSE can be well estimated by multiplying daily E-E601 (E-20cm) with dynamic E-20m2 /E-E601 (E-20m 2 /E-20cm) ratios during ice-free (ice-covered) periods. Daily LSE changes are primarily sensitive to thermal conditions (represented by Delta T), atmospheric evaporative demand (VPD), and radiative forcings (mainly Rn and srad). Decreases in radiative forcings (Rn and srad) mainly dominate the decline in LSE at the interannual scale. In contrast, at the seasonal scale, seasonal variability in LSE is governed by distinct physical regimes, transitioning from thermal limitation in winter to atmospheric-evaporative-demand control in spring, moisture-turbulence regulation in summer, and radiative decay in autumn. Overall, this study establishes a dynamic conversion-coefficient framework for estimating evaporation from alpine lakes, including ice-covered periods, and demonstrates the dominant roles of thermal conditions, atmospheric evaporative demand, and radiative forcings in regulating lake surface evaporation, thereby informing lake evaporation model parameterization and deepening understandings of lake-air interactions in alpine regions. |
| URL标识 | 查看原文 |
| WOS关键词 | TIBETAN PLATEAU ; COMPLEMENTARY PRINCIPLE ; PHYSICAL CONTROLS ; SONIC ANEMOMETER ; LEVEL VARIATIONS ; HEAT-FLUX ; CO LAKE ; WATER ; ENERGY ; CLASSIFICATION |
| WOS研究方向 | Engineering ; Geology ; Water Resources |
| 语种 | 英语 |
| WOS记录号 | WOS:001729756100001 |
| 出版者 | ELSEVIER |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/221520]  |
| 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 | Zhang, Xueqin |
| 作者单位 | 1.Minist Ecol & Environm, Taihu Basin & East China Sea Ecol Environm Supervi, Ecol Environm Monitoring & Sci Res Ctr, Shanghai, Peoples R China 2.Univ Chinese Acad Sci, 19A Yuquan Rd, Beijing 100049, Peoples R China; 3.Inst Geog Sci & Nat Resources Res, Key Lab Land Surface Pattern & Simulat, 11A Datun Rd, Beijing 100101, Peoples R China; |
| 推荐引用方式 GB/T 7714 | Zhang, Fang,Li, Xiang,Zhang, Xueqin,et al. Dynamic conversion coefficients improve alpine lake daily evaporation estimation based on multi-evaporator observations[J]. JOURNAL OF HYDROLOGY,2026,672:135333. |
| APA | Zhang, Fang,Li, Xiang,Zhang, Xueqin,&Zheng, Du.(2026).Dynamic conversion coefficients improve alpine lake daily evaporation estimation based on multi-evaporator observations.JOURNAL OF HYDROLOGY,672,135333. |
| MLA | Zhang, Fang,et al."Dynamic conversion coefficients improve alpine lake daily evaporation estimation based on multi-evaporator observations".JOURNAL OF HYDROLOGY 672(2026):135333. |
入库方式： OAI收割
来源：地理科学与资源研究所
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