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Diurnal freeze/thaw cycles of the ground surface on the Tibetan Plateau

ISSN号：0023-074X
期刊名称：《科学通报》
时间：0
分类：P5[天文地球—地质学]
作者机构：[1]Key Laboratory of Cryosphere and Environment, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000, China, [2]Institute of Tibetan Plateau Research, Chinese Academy of Sciences, Beijing 100085, China, [3]Key Laboratory of Western China's Environment System MOE, Lanzhou University, Lanzhou 730000, China, [4]University of Tokyo, Tokyo, Japan, [5]Hengshui Meteorological Bureau, Hengshui 053000, China, [6]Center for Climatic Research and Department of Geography, University of Delaware, DE 19716, USA
相关基金：Supported by the National Key Basic Research Program （Grant No. 2005CB422004）, the National Natural Science Foundation of China （Grant No. 40571036）, the Century Program of CAS （Grant No. 2004401） and the Talent Program of CAREERI, CASThe authors wish to thank the referees for their very valuable and constructive criticism. The first author would like to express appreciations to the CE0P/CAMP-7libet field team for their support and help. Special thanks also go to Dr. Zhang Tingiun at Colorado University for supplying part of the references.

作者： YANG MeiXue[1,2], YAO TanDong[2], GOU XiaoHua[3], HIROSE Nozomu[4], FUJII Hide Yuki[4], HAO LiSheng[5], D. F. LEVIA[6]

关键词：西藏, 高原, 地貌, 冻结层, 解冻层, Tibetan Plateau, ground surface soil, freeze/thaw processes, diurnal freeze/thaw cycles

中文摘要：

在岩石圈和空气之间的精力和水的交换主要在扎根的表面发生。因此，在扎根的表面结冰 / 融化状况是在检验在陆地表面和空气之间的相互作用的一个重要因素。基于的在观察数据由 CEOP/CAMP-Tibet 获得了，日报在 Naqu 附近结冰 / 融化扎根的表面的周期，中央西藏的高原 preliminarily 被分析。结果证明表面层完全被冻结约一个月。然而，扎根的表面经历了的时间日报结冰 / 融化周期是大约 6 个月。在扎根的表面的 freeze/thawcycles 的高频率显著地在半年影响在地面和空气之间的水和精力交换。在在不同土壤条件下面的地面和空气之间的相互作用过程(例如完全的解冻，完全结冰并且日报结冰 / 融化周期) 是值得进一步的检查的问题。

英文摘要：

The exchange of energy and water between the lithosphere and atmosphere mainly takes place at the ground surface. Therefore, freeze/thaw condition at the ground surface is an important factor in examining the interactions between the land surface and atmosphere. Based on the observation data obtained by CEOPICAMP-Tibet, the diurnal freeze/thaw cycles of the ground surface near Naqu, central Tibetan Plateau was preliminarily analyzed. The results show that the surface layer was completely frozen for approximately one month. However, the time that the ground surface experienced diurnal freeze/thaw cycles was about 6 months. The high frequency of freeze/thaw cycles at the ground surface significantly Influences water and energy exchanges between ground and atmosphere over half a year. The Interaction processes between the ground and atmosphere under different soil conditions （such as complete thaw, complete freeze and diurnal freeze/thaw cycles） are issues worthy of further examination.

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