img

官方微信

img

群号:冰川冻土交流群

QQ群:218834310

高级检索

冰川冻土 ›› 2013, Vol. 35 ›› Issue (5): 1088-1094.doi: 10.7522/j.issn.1000-0240.2013.0122

• 冰冻圈与全球变化 • 上一篇    下一篇

青藏高原昆仑山求勉雷克塔格冰川春季表面温度空间变化特征及其影响因素

王宁练, 贺建桥, 吴红波, 李真   

  1. 中国科学院 寒区旱区环境与工程研究所 冰冻圈科学国家重点实验室, 甘肃 兰州 730000
  • 收稿日期:2013-07-10 修回日期:2013-09-19 出版日期:2013-10-25 发布日期:2013-11-07
  • 作者简介:王宁练(1966-),男,陕西兴平人,研究员,2001年在中国科学院寒区旱区环境与工程研究所获博士学位,现主要从事冰冻圈与全球变化研究.E-mail:nlwang@lzb.ac.cn
  • 基金资助:
    全球变化研究国家重大科学研究计划项目(2010CB951404);中国科学院战略性先导科技专项(XDB03030204);国家自然科学基金项目(40930526;41190084)资助

Spatial Variation in Spring Surface Temperature of the Qiumianleiketage Glacier in the Kunlun Mountains, Tibetan Plateau, and Their Influencing Factors

WANG Ning-lian, HE Jian-qiao, WU Hong-bo, LI Zhen   

  1. State Key Laboratory of Cryospheric Sciences, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou Gansu 730000, China
  • Received:2013-07-10 Revised:2013-09-19 Online:2013-10-25 Published:2013-11-07

摘要: 通过对2013年春季在青藏高原昆仑山求勉雷克塔格冰川上取得的冰川表面温度资料的分析, 研究了该冰川表面温度空间变化特征及其影响因素. 结果表明: 该冰川表面(粒雪)温度在晴天时较多云或阴雪天时偏低, 这可能与晴天时冰川表面吸收的部分热量用于粒雪消融而不是粒雪层升温有关;晴天时该冰川表面温度随海拔的升高而降低, 其递减率值为0.58 ℃·(100m)-1, 较自由大气的气温递减率值略偏低;晴天时, 冰川表层粒雪层厚度对其表面温度具有重要的影响, 二者之间呈显著的正相关关系, 并且粒雪层厚度每增加10 cm, 其冰川表面温度会升高约0.46 ℃. 结合青藏高原其他冰川表面温度的观测结果, 揭示出当冰川表面存在消融时其表面温度日变化幅度较小, 一般只有几度.

关键词: 冰川表面温度, 粒雪层厚度, 天气变化, 求勉雷克塔格冰川, 青藏高原

Abstract: Based on the measured surface temperature data on the Qiumianleiketage Glacier in the Kunlun Mountains, Tibetan Plateau, in the spring of 2013, it was found that: 1) the glacier surface (covered by firn) temperature was lower in the clear day than in the cloudy or overcast day, which might be caused by that some parts of energy absorbed by the glacier surface were consumed for the firn surface melting rather than for the firn surface temperature increasing in the clear day;2) the glacier surface temperature decreased with increasing altitude with a lapse rate of 0.58 ℃·(100m)-1 in the clear day, which is slightly lower than the local free-air lapse rate;3) the depth of firn on the glacier surface could exert an important influence on the surface temperature in the clear day, and there was a significant positive relationship between them, which showed that the firn surface temperature increased by 0.46 ℃ while the depth of firn increased by 10 cm. By comprehensive analysis of the surface temperature data from the glaciers over the Tibetan Plateau, it was revealed that the diurnal amplitude of glacier surface temperature was small, only about several degrees, under the condition that the melting occurred on the glacier surface.

Key words: glacier surface temperature, firn depth, weather change, Qiumianleiketage Glacier, Tibetan Plateau

中图分类号: 

  • P343.6