| 藏东南嘎隆拉冰川表碛冻融过程与零点幕效应 |
| |
| 引用本文： | 罗伦,朱立平,王永杰,杨威,旦增,张宏波.藏东南嘎隆拉冰川表碛冻融过程与零点幕效应[J].冰川冻土,2019,41(4):751-760. |
| |
| 作者姓名： | 罗伦 朱立平 王永杰 杨威 旦增 张宏波 |
| |
| 作者单位： | 中国科学院青藏高原研究所青藏高原环境变化与地表过程实验室,北京100101;中国科学院藏东南高山环境综合观测研究站,西藏林芝860119;中国科学院青藏高原研究所青藏高原环境变化与地表过程实验室,北京100101;中国科学院藏东南高山环境综合观测研究站,西藏林芝860119;中国科学院青藏高原地球科学卓越创新中心,北京100101;中国科学院青藏高原研究所青藏高原环境变化与地表过程实验室,北京100101;中国科学院青藏高原地球科学卓越创新中心,北京100101;西藏自治区林芝市气象局,西藏 林芝,860000;中国科学院青藏高原研究所青藏高原环境变化与地表过程实验室,北京,100101 |
| |
| 基金项目： | 中国科学院战略性先导科技专项（A类）项目（XDA19020303；XDA20020102）；国家自然科学基金重点项目（91547104；41831177）；中国科学院野外站联盟项目（KFJ-SW-YW038）资助 |
| |
| 摘 要： | 冰川表碛区冻融过程的观测分析有助于厘清各层之间能量和水分传输的关系，从而为构建相应的能量平衡模型以及冰川径流模型提供理论支持。基于2015年10月至2016年11月嘎隆拉冰川表碛区自动气象站气象资料，对表碛区冻融过程进行分析，结果表明：表碛中出现冻土中常见的秋季和春季零点幕效应，秋季零点幕持续时间32天，春季零点幕持续58天；春季零点幕期间，气温和地表温度均呈现清晨低，午后高的日变化特征，而表碛层内温度没有明显的日变化特征，其体积含水率呈“脉冲式”变化；春季零点幕效应结束，底层冻结层破坏后，冰川冰消融才开始；嘎隆拉冰川表碛对冰川冰消融的影响不仅是因为表碛较厚，在消融量上抑制了冰川冰的消融，而且更重要的是表碛产生零点幕效应，延迟了表碛下冰川冰开始消融的日期，在时间上抑制了冰川冰消融。
|
| 关 键 词： | 表碛覆盖型冰川 冻融过程 零点幕 温度 体积含水率 |
| 收稿时间： | 2018-06-14 |
| 修稿时间： | 2018-12-25 |
The process of freezing and thawing and the zero curtain effect of debris-covered area of the Galongla Glacier in the southeastern Tibetan Plateau |
| |
| LUO Lun,ZHU Liping,WANG Yongjie,YANG Wei,Danzeng,ZHANG Hongbo.The process of freezing and thawing and the zero curtain effect of debris-covered area of the Galongla Glacier in the southeastern Tibetan Plateau[J].Journal of Glaciology and Geocryology,2019,41(4):751-760. |
| |
| Authors: | LUO Lun ZHU Liping WANG Yongjie YANG Wei Danzeng ZHANG Hongbo |
| |
| Institution: | 1. Key Laboratory of Tibetan Environment Changes and Land Surface Processes, Institute of Tibetan Plateau Research, Chinese Academy of Sciences, Beijing 100101, China;2. Tibetan Plateau Station for integrated observation and research of alpine environment of CAS, Nyingchi 860119, Tibet, China;3. Chinese Academy of Sciences Center for Excellence in Tibetan Plateau Earth Sciences, Beijing 100101, China;4. Nyingchi Meteorological Administration, Nyingchi 860000, Tibet, China |
| |
| Abstract: | Observation and analysis of the freezing-thawing process in debris-covered area of a glacier play an important role in understanding the energy and water transfer relationship between debris-covered layers. Based on the meteorological data from automatic meteorological station in debris-covered area of the Galongla Glacier from October 2015 to November 2016, the freezing-thawing processes of the debris-covered area were analyzed. The zero curtain effects in autumn and spring, which usually occur in frozen soil, are found in debris-covered area, which lasts for 32 days in autumn and 58 days in spring. The diurnal variation characteristics with low values in morning and high values in afternoon of average temperature and the surface temperature during the spring zero curtain period were presented, while the temperature in the debris layer had no obvious diurnal variation, and the volume water content showed an impulse. At the end of the zero-curtain effect in spring, the destruction of the underlying frozen layer and the ablation of glacier ice began. The effect of debris cover of the Galongla glacier on glacial ice ablation was not only because of the thicker debris cover which inhibits the ablation quantity of glacial ice, but also because that the starting date of glacial ice ablation delayed when the zero curtain effect produced in debris cover. |
| |
| Keywords: | debris-covered glacier freezing-thawing process zero curtain temperature volume water content |
| 本文献已被 万方数据 等数据库收录！ |
| 点击此处可从《冰川冻土》浏览原始摘要信息 |
| 点击此处可从《冰川冻土》下载免费的PDF全文 |
|
