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冰川冻土 ›› 2018, Vol. 40 ›› Issue (6): 1216-1222.doi: 10.7522/j.issn.1000-0240.2018.0418

• 寒旱区水文水资源 • 上一篇    下一篇

青海湖流域瓦颜山湿地辐射平衡和地表反照率变化特征

张乐乐1,2, 高黎明1,2, 陈克龙2,3   

  1. 1. 青海师范大学 地理科学学院, 青海 西宁 810008;
    2. 青海省自然地理与环境过程重点实验室, 青海 西宁 810008;
    3. 青海师范大学 科技处, 青海 西宁 810008
  • 收稿日期:2017-05-07 修回日期:2017-07-06 出版日期:2018-12-25 发布日期:2019-01-21
  • 通讯作者: 陈克龙,E-mail:ckl7813@163.com E-mail:ckl7813@163.com
  • 作者简介:张乐乐(1986-),男,河南新安人,副教授,2016年在中国科学院寒区旱区环境与工程研究所获博士学位,从事寒区水文与地表过程研究.E-mail:zhang1986lele@163.com
  • 基金资助:
    青海省自然科学基金项目(2017-ZJ-951Q);国家自然科学基金项目(41705139;41661023;41360005;41261020)资助

The variation characteristics of radiation balance and surface albedo in Wayanshan Wetland in the Qinghai Lake watershed

ZHANG Lele1,2, GAO Liming1,2, CHEN Kelong2,3   

  1. 1. College of Geographical Science, Qinghai Normal University, Xining 810008, China;
    2. Qinghai Province Key Laboratory of Physical Geography and Environmental Process, Xining 810008, China;
    3. Science and Technology Department, Qinghai Normal University, Xining 810008, China
  • Received:2017-05-07 Revised:2017-07-06 Online:2018-12-25 Published:2019-01-21

摘要: 利用2014年5月至2015年11月青海湖流域瓦颜山湿地观测的辐射资料,综合分析了辐射相关因子的变化特征。结果表明:瓦颜山湿地总辐射和净辐射的最大值都出现在7月,最小值都出现在12月;大气长波辐射最大值出现在8月,最小值出现在12月;地面长波辐射最大值出现在7月,最小值出现在2月。阴天对总辐射和地面反射辐射削弱作用比较明显,对大气长波辐射增强作用明显,对地面长波辐射和净辐射的影响季节差异性很大。瓦颜山湿地地表反照率的年均值为0.26。在无积雪覆盖条件下,地表反照率在冻结期明显大于消融期,最大值出现在12月。夏季地表反照率均值为0.185,略小于下垫面同为草甸的青藏高原唐古拉站。在暖季,土壤水分也是影响高寒湿地地表反照率变化的重要因子,随着表层土壤含水量的增加,地表反照率随之减小。

关键词: 辐射平衡, 地表反照率, 青海湖流域, 瓦颜山湿地

Abstract: Based on the solar radiation data observed from May 2014 to November 2015 in the Wayanshan Wetland, Qinghai Lake watershed, a comprehensive analysis of the solar radiation was made in this study. The results showed that the maximum net radiation and global radiation in the Wayanshan Wetland appeared in July and the minimum values appeared in December. The maximum atmospheric long-wave radiation appeared in August and the minimum value appeared in December. The maximum ground long-wave radiation appeared in July and the minimum value appeared in February. The cloudy day had obviously decreased the global radiation and obviously increased the atmospheric long-wave radiation, but to net radiation and ground long-wave radiation it had different effect in different seasons, with great seasonal difference in ground long-wave radiation and net radiation. The annual average value of surface albedo in the Wayanshan Wetland was 0.26. Under no snow cover condition, the surface albedo in freezing period was significantly greater than that in ablation period, with the maximum value appeared in December. The average value of summer surface albedo in Wayanshan Wetland was 0.185, much smaller than that in Tanggula Station. The underlying surface of the two stations was all meadow. In warm season, soil moisture was also an important factor affecting surface albedo of alpine wetland, and albedo decreased with increase of soil water content.

Key words: radiation balance, surface albedo, Qinghai Lake watershed, Wayanshan Wetland

中图分类号: 

  • P422