| 东北北部冻土退化与寒区生态环境变化 |
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| 引用本文： | 何瑞霞,金会军,吕兰芝,于少鹏,常晓丽,杨思忠,王绍令,孙广友.东北北部冻土退化与寒区生态环境变化[J].冰川冻土,2009,31(3):525-531. |
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| 作者姓名： | 何瑞霞 金会军 吕兰芝 于少鹏 常晓丽 杨思忠 王绍令 孙广友 |
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| 作者单位： | 中国科学院,寒区旱区环境与工程研究所,冻土工程国家重点实验室,甘肃,兰州,730000;中国科学院,寒区旱区环境与工程研究所,冻土工程国家重点实验室,甘肃,兰州,730000;哈尔滨学院,地理系,黑龙江,哈尔滨,150086;中国科学院,东北地理与农业生态研究所,吉林,长春,130062 |
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| 基金项目： | 国家自然科学基金项目，中国科学院知识创新工程重要方向项目，中国科学院百人计划项目"气候变化条件下高温冻土区线性工程基础稳定性研究"资助 |
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| 摘 要： | 我国东北地区位于中高纬度欧亚大陆东缘,大、小兴安岭多年冻土区是欧亚大陆高纬冻土区向南最突出的部位,属于高纬山地冻土.东北多年冻土区是我国,乃至全球范围内,受气候变暖和人为活动影响最显著的冻土区之一.过去40 a来该区冻土显著退化,主要表现在:1)冻土南界及不连续多年冻土各分区边界北移而导致总面积减小、空间分布破碎化;2)活动层加深,融区扩大,局地冻土岛消失;3)冻土温度升高、厚度减薄、热稳定性降低等.由于各种因素的共同影响,寒区生态环境也发生了一系列变化.这具体表现为以兴安落叶松占绝对优势的天然林带锐减,整个北方森林带北移,沼泽湿地面积减小等,寒区生态系统和环境已出现恶性循环.关注、研究、整治和管护寒区环境对区域社会、经济和生态可持续发展不可或缺.
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| 关 键 词： | 兴安岭 冻土退化 证据 北方森林、湿地生态系统 寒区生态环境变化 |
Recent Changes of Permafrost and Cold Regions Environments in the Northern Part of Northeastern China |
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| HE Rui-xia,JIN Hui-jun,L Lan-zhi,YU Shao-peng,CHANG Xiao-li,YANG Si-zhong,WANG Shao-ling,SUN Guang-you.Recent Changes of Permafrost and Cold Regions Environments in the Northern Part of Northeastern China[J].Journal of Glaciology and Geocryology,2009,31(3):525-531. |
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| Authors: | HE Rui-xia JIN Hui-jun L Lan-zhi YU Shao-peng CHANG Xiao-li YANG Si-zhong WANG Shao-ling SUN Guang-you |
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| Institution: | 1.State Key Laboratory Frozen Soils Engineering;Cold and Arid Regions Environmental and Engineering Research Institute;Chinese Academy of Sciences;Lanzhou Gansu 730000 China;2.Department of Geography;Harbin College;Harbin Heilongjiang 150086;China;3.Northeast Institute of Geography and Agroecology;Changchun Jilin 130062;China |
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| Abstract: | The Northeastern China is located on the eastern margin of the Eurasian Continent in the mid-to high-latitudes.The permafrost in the Da and Xiao Xing'anling Mountains lies at the southernmost parts of the Eurasian latitudinal permafrost zone.The permafrost region in Northeastern China has been the very area in China,or even in the world,most severely impacted by climate warming and anthropogenic activities.During the last four decades,permafrost has been in rapid degradation as evidenced by: 1) Northward sh... |
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| Keywords: | Xing'anling Mountains permafrost degradation evidences boreal forest and wetlands ecosystems changes in cold regions ecological environments |
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