青藏高原唐古拉地区暖季土壤水分对地表反照率及其土壤热参数的影响

doi:10.7522/j.issn.1000-0240.2016.0038

冰川冻土 ›› 2016, Vol. 38 ›› Issue (2): 351-358.doi: 10.7522/j.issn.1000-0240.2016.0038

青藏高原唐古拉地区暖季土壤水分对地表反照率及其土壤热参数的影响

张乐乐^{1 2}, 赵林¹, 李韧¹, 高黎明², 肖瑶¹, 乔永平¹, 史健宗¹

1. 中国科学院寒区旱区环境与工程研究所青藏高原冰冻圈观测研究站/冰冻圈科学国家重点实验室, 甘肃兰州 730000;
2. 中国科学院大学, 北京 100049

收稿日期:2015-08-18 修回日期:2016-01-21 出版日期:2016-04-25 发布日期:2016-07-13
作者简介:张乐乐(1986-),男,河南新安人,2013年在中国科学院寒区旱区环境与工程研究所获硕士学位,现为在读博士研究生,主要从事寒区陆面过程研究.E-mail:zhang1986lele@163.com
基金资助:
国家重大科学研究计划项目（2013CBA01803）；国家自然科学基金项目（41271081；41271086）；中国科学院百人计划项目（51Y251571；51Y551831）；中国科学院重点部署项目（KJZD-EW-G03-02）资助

Investigating the influence of soil moisture on albedo and soil thermodynamic parameters during the warm season in Tanggula Range, Tibetan Plateau

ZHANG Lele^{1 2}, ZHAO Lin¹, LI Ren¹, GAO Liming², XIAO Yao¹, QIAO Yongping¹, SHI Jianzong¹

1. Cryosphere Research Station on Qinghai-Xizang Plateau/State Key Laboratory of Cryospheric Sciences, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000, China;
2. University of Chinese Academy of Sciences, Beijing 100049, China

Received:2015-08-18 Revised:2016-01-21 Online:2016-04-25 Published:2016-07-13

摘要/Abstract

摘要： 为了研究青藏高原暖季土壤水分对冻土区地表热状况的影响，选取2010-2012年5-9月在青藏高原唐古拉气象场获取的气象及其活动层数据，分析了表层土壤水分对地表反照率以及土壤热参数的影响.结果表明：唐古拉站暖季表层土壤含水量集中在0.15～0.27之间，地表反照率值集中在0.14～0.24之间，日平均土壤热导率的波动范围在0.9～2.0 W·m^-1·K^-1之间，土壤热容的波动范围主要集中在0.8×10⁶～1.8×10⁶ J·m^-3·K^-1之间，而土壤热扩散率则主要集中在0.6×10^-6～2.2×10^-6 m2·s^-1之间.土壤水分对地表反照率影响较大，随着土壤水分的增长，地表反照率呈现出明显的减小趋势.土壤水分对地表反照率的影响还受到植被生长周期的影响，土壤水分和地表反照率之间的关系在植被枯萎期和生长期有明显的差异性.唐古拉地区土壤热参数也明显受到土壤水分变化的影响，随着土壤水分的增加，土壤热导率、热容和热扩散率都为增大趋势，但是土壤水分对土壤热导率的影响较为显著，而对土壤热扩散率的影响则不显著.

关键词: 青藏高原, 土壤水分, 地表反照率, 土壤热参数

Abstract: In order to study the effects of soil moisture on surface thermal state of permafrost in warm season on the Tibetan Plateau, meteorological and active layer data during May and September from 2010 to 2012 in Tanggula meteorological field on the Qinghai-Tibetan Plateau were selected for analyzing the relationship between the surface soil moisture and surface albedo well as the soil thermal parameters. The results show that the soil moisture were between 0.15 and 0.27, surface albedo values were between 0.14 and 0.24, daily average soil thermal conductivity were 0.9~2.0 W·m^-1·K^-1, the soil heat capacity mainly concentrated between the 0.8×10⁶ and 1.8×10⁶ J·m^-3·K^-1, and soil thermal diffusivity was mainly concentrated between the 0.6×10^-6 and 2.2×10^-6 m²·s^-1 in the warm season of the Tanggula station. The effect of soil moisture on surface albedo was great, with the increase of soil moisture, and the surface albedo shows a clear increasing trend. The effect of soil moisture on the surface albedo was also affected by the vegetation growth cycle, the relationship between soil moisture and surface albedo were significantly different between the withered and the growth periods. Soil thermal parameters was also influenced significantly by the changes of soil moisture, with the increase of soil moisture, soil thermal conductivity, heat capacity and thermal diffusivity also showed increasing trend, but the effect of soil moisture on soil thermal conductivity was significant, while the influence on soil thermal diffusivity was not significant.

Key words: Qinghai-Tibetan Plateau, soil moisture, albedo, soil thermodynamic parameters

中图分类号:

S152.7

张乐乐, 赵林, 李韧, 高黎明, 肖瑶, 乔永平, 史健宗. 青藏高原唐古拉地区暖季土壤水分对地表反照率及其土壤热参数的影响[J]. 冰川冻土, 2016, 38(2): 351-358.

ZHANG Lele, ZHAO Lin, LI Ren, GAO Liming, XIAO Yao, QIAO Yongping, SHI Jianzong. Investigating the influence of soil moisture on albedo and soil thermodynamic parameters during the warm season in Tanggula Range, Tibetan Plateau[J]. JOURNAL OF GLACIOLOGY AND GEOCRYOLOGY, 2016, 38(2): 351-358.

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青藏高原唐古拉地区暖季土壤水分对地表反照率及其土壤热参数的影响

Investigating the influence of soil moisture on albedo and soil thermodynamic parameters during the warm season in Tanggula Range, Tibetan Plateau

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