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冰川冻土 ›› 2019, Vol. 41 ›› Issue (4): 801-808.doi: 10.7522/j.issn.1000-0240.2017.0329

• 冰冻圈与全球变化 • 上一篇    

青藏高原中部高寒草甸蒸散发特征及其影响因素

王利辉1,2,3, 何晓波1,2, 丁永建1,2,3   

  1. 1. 中国科学院 西北生态环境资源研究院 冰冻圈科学国家重点实验室, 甘肃 兰州 730000;
    2. 中国科学院 西北生态环境资源研究院 内陆河流域生态水文重点实验室, 甘肃 兰州 730000;
    3. 中国科学院大学, 北京 100049
  • 收稿日期:2016-10-17 修回日期:2017-09-12 发布日期:2019-11-28
  • 通讯作者: 何晓波,E-mail:hxb@lzb.ac.cn. E-mail:hxb@lzb.ac.cn
  • 作者简介:王利辉(1990-),女,山西大同人,2014年在太原师范学院获学士学位,现为中国科学院西北生态环境资源研究院在读硕士研究生,从事寒区水文研究.E-mail:tysywlh@126.com
  • 基金资助:
    国家重点研发计划项目(2017YFC0405704);国家自然科学基金项目(41271079);冰冻圈科学国家重点实验室自主课题项目(SKLCS-ZZ-2018)资助

Characteristics and influence factors of the evapotranspiration from alpine meadow in central Qinghai-Tibet Plateau

WANG Lihui1,2,3, HE Xiaobo1,2, DING Yongjian1,2,3   

  1. 1. State Key Laboratory of Cryospheric Sciences, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou 730000, China;
    2. Key Laboratory of Ecohydrology of Inland River Basin, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou 730000, China;
    3. University of Chinese Academy of Sciences, Beijing 100049, China
  • Received:2016-10-17 Revised:2017-09-12 Published:2019-11-28

摘要: 蒸散发作为水量平衡和能量平衡的重要组成部分,其变化对于农业、生态和水文具有重要的影响。全球变暖导致青藏高原上冻土活动层加厚,改变大气和土壤的水热交换过程,为明确唐古拉多年冻土区的蒸散发在全球变暖大背景下的变化趋势,依托中国科学院冰冻圈国家重点实验室唐古拉站,利用小型称重式蒸渗仪的观测数据分析了2007-2013年蒸散发的变化特征及其影响因素。结果表明:2007-2013年草地生长季实际蒸散发总量呈现递增的趋势;在草地生长季内,草地生长中期的总蒸散量最大,生长初期的总蒸散量最小,但是日蒸散量则是在生长初期最大,生长后期最小;无降水日,草地的蒸散发主要受到净辐射和气温的影响,降雨日的蒸散发则主要受到净辐射和风速的影响。

关键词: 青藏高原, 高寒草甸, 蒸渗仪, 蒸散发, 年际变化, 年内变化, 相关关系

Abstract: In this study, the characteristics of evapotranspiration and its influencing factors from 2007 through 2013 were studied by using micro-lysimeter relying on the Tangula Station of State Key Laboratory of Cryospheric Sciences, Chinese Academy of Sciences. The main conclusion are:(1) there had been an evapotranspiration increasing from 2007 through 2013 during the grass growing season; (2) the total evapotranspiration quantity in the middle growth stage had been the maximum while in the early growth stage had been the minimum, but the average daily evapotranspiration in the early growth stage had been the maximum, while in the later growth stage had been the minimum; (3) the evapotranspiration had been mainly controlled by the net radiation in the absence of precipitation and had been mainly affected by wind speed, and then by radiation.

Key words: Qinghai-Tibet Plateau, alpine meadow, micro-lysimeter, evapotranspiration, annual variability, variation in the year, correlation

中图分类号: 

  • P426.2