干旱区生态环境知识资源中心(Arid): 内蒙古及东北地区古冻土及古环境考察研究新进展

Arid

	内蒙古及东北地区古冻土及古环境考察研究新进展
其他题名	Recent Progress in the Study of Paleo-permafrost and Paleo-environments in the Inner Mongolia Region and Northeast China
	杨思忠 1; 金会军 1; 郭东信 1; 吕兰芝 1; 常晓丽 1; 何瑞霞 1; 于少鹏 1; 孙广友 2; 张秋良 3; 周梅 3
ISSN	1000-0240
出版年	2009
卷号	31 期号:6 页码:1043-1049
中文摘要	中国北方地区保留了晚更新世以来大量的冰缘遗迹. 在气候变化背景下, 在寒区和干旱区分别出现冰缘地貌、正逆向沙化等问题, 综合不同区域的地质遗迹, 从时间上的对应关系可进一步分析气候环境变化问题. 2008年5-7月调查中, 在鄂尔多斯和大同地区分别发现了新的砂楔和土楔;在大兴安岭生态定位研究站设立了8个钻孔和2套自动气象站, 开启了冻土、湿地、积雪研究以及现代陆面过程对下伏冻土影响的研究;在黄岗梁地区新发现了一个冻融褶皱;调查了松嫩沙地古沙丘及古土壤活动与冻土进退的关系;发现小兴安岭地区冻土退化显著, 岛状冻土散布于海拔相对较高的地区;三江平原西部农业开发强烈改变了地表覆盖, 冻土温度升高显著, 冻土上限下降明显, 甚至厚度较薄的冻土消失. 后期工作希望通过综合、集成分析以上结果, 探讨我国北方地区晚更新世/全新世的冻土南界及环境变迁.
英文摘要	In the north of China, there are relics of ice-wedge casts and sand wedges far back in the Late Pleistocene. These periglacial relics, associated with paleo-permafrost in some areas and some phenomena resulted from the glacial-interglacial climate fluctuations, may be explained by desertification or dune-fixation in the arid regions. Under such circumstances, the paleoclimatic proxies in different regions can be cross-examined and use to reconstruct the paleo-climatic and environmental changes and advance-retreat of the southern limit of permafrost. Therefore, a fieldwork was carried out from May to July, 2008 to investigate the periglacial relics and paleosols in Erdos in Inner Mongolia, Huanggangliang Mountains, Xiao Hinggan Mountains, Songnen Sandland and Sanjiang Plain in Northeastern China. Newly exposed sandy and soil wedges were investigated in Erdos and Datong regions, respectively. A observation transect consisting of eight boreholes and two automatic stations was established in the China Ecological Research Networks Station at Genhe in the middle part of the Da Hinggan Mountains to study the relationship among permafrost, forested wetlands (muskegs) and snow cover, and the effects of terrestrial processes on permafrost. In the Huanggangliang Mountains, involutions were found and sampled for reconstructing the development of permafrost. In the Songnen Sandland, the development of paleo-sand dunes and paleosols were compared with the advances and retreats of permafrost in other parts. In the Xiao Hinggan Mountains, the degradation of permafrost and the shrinkage of sporadic permafrost were significant. Surface coverage changes due to agriculture development result in rising permafrost temperature and decreasing permafrost table, or disappearance of shallow permafrost. Integration and comparation of the preliminary results might give useful clues of the changes of southern limit of permafrost and environment in Pleistocene and Holocene in northern China.
中文关键词	鄂尔多斯 ; 兴安岭 ; 冰缘地貌 ; 古土壤 ; 冻土南界
英文关键词	Ordos Hinggan Mountains periglacial geomorphology paleosols southern limit of permafrost
语种	中文
国家	中国
收录类别	CSCD
WOS类目	MINERALOGY
WOS研究方向	Mineralogy
CSCD记录号	CSCD:3789570
来源机构	中国科学院西北生态环境资源研究院 ; 内蒙古农业大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/223289
作者单位	1.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, 兰州, 甘肃 730000, 中国; 2.中国科学院,东北地理与农业生态研究所, 长春, 吉林 130032, 中国; 3.内蒙古农业大学, 呼和浩特, 内蒙古 010019, 中国
推荐引用方式 GB/T 7714	杨思忠,金会军,郭东信,等. 内蒙古及东北地区古冻土及古环境考察研究新进展[J]. 中国科学院西北生态环境资源研究院, 内蒙古农业大学,2009,31(6):1043-1049.
APA	杨思忠.,金会军.,郭东信.,吕兰芝.,常晓丽.,...&周梅.(2009).内蒙古及东北地区古冻土及古环境考察研究新进展.,31(6),1043-1049.
MLA	杨思忠,et al."内蒙古及东北地区古冻土及古环境考察研究新进展".31.6(2009):1043-1049.