| 青藏高原多年冻土区植被盖度变化对活动层水热过程的影响 |
| |
| 引用本文： | 刘光生,王根绪,胡宏昌,李太兵,王俊峰,任东兴,黄雅娟.青藏高原多年冻土区植被盖度变化对活动层水热过程的影响[J].冰川冻土,2009,31(1):89-95. |
| |
| 作者姓名： | 刘光生 王根绪 胡宏昌 李太兵 王俊峰 任东兴 黄雅娟 |
| |
| 作者单位： | 兰州大学资源环境学院,甘肃兰州,730000;兰州大学资源环境学院,甘肃兰州730000;中国科学院成都山地灾害与环境研究所,四川成都610041 |
| |
| 基金项目： | 国家重点基础研究发展规划(973计划)，国家自然科学基金，中国科学院"百人计划"项目 |
| |
| 摘 要： | 不同植被盖度变化下活动层水热过程是多年冻土区水能循环中一个重要的不确定因素.为了研究植被盖度变化对活动层水热过程的影响,在青藏高原多年冻土区,选择坡向、坡型和坡度趋于一致植被覆盖度分别为92%、65%、30%的坡面建立天然径流观测场,觎测多年冻土活动层中的地温和水分状况.结果表明:活动层开始冻结和消融时间随着植被盖度的减少不断提前,且冻结持续时间缩短;随着植被盖度减小,活动层地温水分变化速率增大,植被起到抑制土壤地温水分变化速率的作用;植被盖度对夏季融化过程和秋季冻结过程活动层地温和水分的影响明显大于冬季降温和春季升温过程,对融化过程的影响较冻结过程更明显.
|
| 关 键 词： | 青藏高原 多年冻土 植被盖度 水热过程 活动层 |
Influence of Vegetation Coverage on Water and Heat Processes of the Active Layer in Permafrost Regions of the Tibetan Plateau |
| |
| LIU Guang-sheng,WANG Gen-xu,HU Hong-chang,LI Tai-bing,WANG Jun-feng,REN Dong-xing,HUANG Ya-juan.Influence of Vegetation Coverage on Water and Heat Processes of the Active Layer in Permafrost Regions of the Tibetan Plateau[J].Journal of Glaciology and Geocryology,2009,31(1):89-95. |
| |
| Authors: | LIU Guang-sheng WANG Gen-xu HU Hong-chang LI Tai-bing WANG Jun-feng REN Dong-xing HUANG Ya-juan |
| |
| Institution: | 1.School of Resources and Environmental Sciences;Lanzhou University;Lanzhou Gansu 730000;China;2.Institute of Mountain Hazards and Environment;Chinese Academy of Sciences;Chengdu Sichuan 610041;China |
| |
| Abstract: | The effect of vegetation coverage on the soil water heat process is one of the most important uncertain factors to the hydrology and energy cycles in permafrost regions.To investigate the process of water and heat changes under different vegetation coverage,three runoff plots were established on the places where the topography was of the same slope,direction and shape and where the vegetation coverage was 92%,65% and 30%,respectively,in permafrost region of the Tibetan Plateau,which can be used for observin... |
| |
| Keywords: | Tibetan Plateau permafrost vegetation coverage water and heat processes active layer |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
|
