Characteristics of Evapotranspiration and Water Consumption of Typical Alpine Desert in the Tibetan Plateau During the Growing Season

doi:10.11733/j.issn.1007-0435.2021.Z1.016

Acta Agrestia Sinica ›› 2021, Vol. 29 ›› Issue (S1): 137-145.DOI: 10.11733/j.issn.1007-0435.2021.Z1.016

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Characteristics of Evapotranspiration and Water Consumption of Typical Alpine Desert in the Tibetan Plateau During the Growing Season

SUN Shu-jiao^1,2, ZHOU Bing-rong^1,2, ZHOU Hua-kun³, WANG Xiu-ying^1,2, QUAN Chen^1,2, LI Fu^1,2, CHEN Qi^1,2

1. Key Laboratory of Disaster Prevention and Mitigation of Qinghai Province, Xining, Qinghai Province 810001, China;
2. The Qinghai Institute of Meteorological Science, Xining, Qinghai Province 810001, China;
3. Key Laboratory of Cold Regions Restoration Ecology, Qinghai Province, Northwest Plateau Institute of Biology, Chinese Academy of Sciences, Xining, Qinghai Province 810008, China

Received:2021-04-14 Revised:2021-05-14 Online:2021-10-30 Published:2021-11-17

青藏高原典型高寒荒漠生长季蒸散及水分消耗特征研究

孙树娇^1,2, 周秉荣^1,2, 周华坤³, 王秀英^1,2, 权晨^1,2, 李甫^1,2, 陈奇^1,2

1. 青海省防灾减灾重点实验室, 青海西宁 810001;
2. 青海省气象科学研究所, 青海西宁 810001;
3. 中国科学院西北高原生物研究所青海省寒区恢复生态学重点实验室, 青海西宁 810008

通讯作者: 周秉荣,E-mail:zbr0515@foxmail.com
作者简介:孙树娇(1995-),女,青海互助人,硕士研究生,主要从事高寒生态气象方面的研究,E-mail:sunshj17@lzu.edu.cn
基金资助:
国家重点研发计划（2018YFC1505701）；国家科技部青藏高原第二次科考项目子专题（2019QZKK020615）；青海省科技厅基础研究计划（2019-ZJ-7060）资助

Abstract

Abstract: To explore the law of water consumption in the underlying surface of a typical alpine desert on the Qinghai-Tibet Plateau, we analyzed the characteristics of ET change and water consumption on different time scales based on the raw eddy-covariance data and meteorological data measured in April to August 2019 from the observation tower on Tuotuohe weather station. The maximum hourly average ET appears at 2-3 p. m, reaching 0.46 mm·h^-1;The maximum value of daily ET was 8.58 mm·d^-1 on July 7, and the minimum value was 0.30 mm·d^-1 on April 2;The ET increased first and then decreased during the growing season, the monthly ET_max was 120.68 mm in July and the ET_min was 64.80 mm in April;The total ET in 2019 growth season was 581.15 mm and the daily average was 4.01 mm. The total precipitation of the whole growing season was 235.70 mm, according to the difference between ET and precipitation(Pr) from April to August, water vapor exchange during the plant growth season was mainly characterized by water consumption on the land surface in 2019.

Key words: Alpine desert, Evapotranspiration, Water consumption characteristic

摘要： 为探究青藏高原典型高寒荒漠下垫面水分消耗规律，以2019年青藏高原典型高寒荒漠地区沱沱河站监测的涡动数据和微气象数据为基础，分析不同时间尺度蒸散值的变化特征和下垫面水分消耗特征，研究结果表明：小时平均蒸散发量最大值出现在14—15时，达0.46 mm·h^-1；日蒸散值最大值出现在7月7日，为8.58 mm·d^-1，最小值出现在4月2日，为0.30 mm·d^-1；整个生长季蒸散值呈先增加后减小趋势，其中7月份最大，为120.68 mm，4月份最小，为64.80 mm；生长季总蒸散发量为581.15 mm，平均每天蒸散4.01 mm。整个生长季累计降水量为235.70 mm，蒸散发量与降水量（Precipitation，Pr）的差值（The difference between ET and Precipitation，IETP）显示，2019年青藏高原典型高寒荒漠植被生长季（4—8月）水汽交换以下垫面水分消耗为主。

关键词: 高寒荒漠, 蒸散发, 耗水特征

CLC Number:

SUN Shu-jiao, ZHOU Bing-rong, ZHOU Hua-kun, WANG Xiu-ying, QUAN Chen, LI Fu, CHEN Qi. Characteristics of Evapotranspiration and Water Consumption of Typical Alpine Desert in the Tibetan Plateau During the Growing Season[J]. Acta Agrestia Sinica, 2021, 29(S1): 137-145.

孙树娇, 周秉荣, 周华坤, 王秀英, 权晨, 李甫, 陈奇. 青藏高原典型高寒荒漠生长季蒸散及水分消耗特征研究[J]. 草地学报, 2021, 29(S1): 137-145.

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Characteristics of Evapotranspiration and Water Consumption of Typical Alpine Desert in the Tibetan Plateau During the Growing Season

青藏高原典型高寒荒漠生长季蒸散及水分消耗特征研究

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