干旱区生态环境知识资源中心(Arid): 全新世浑善达克沙地粒度旋回及其反映的气候变化

Arid

	全新世浑善达克沙地粒度旋回及其反映的气候变化
其他题名	Climate Changes Revealed by Grain-size Cycles of Holocene in Hunshandake Desert
	张洪; 靳鹤龄; 苏志珠; 孙忠
来源期刊	中国沙漠
ISSN	1000-694X
出版年	2005
卷号	25 期号:1 页码:1-7
中文摘要	利用浑善达克沙地北部锡林浩特风成砂/古土壤剖面的粗颗粒含量、标准偏差、中值粒径、平均粒径和粘粒含量等气候代用指标,对浑善达克沙地10 ka以来的沉积物粒度进行了系统分析研究.结果表明气候变化存在4个阶段:10.7～9.6 ka BP气候相对干冷;9.6～6 ka BP气候温暖湿润; 6～3.4 ka BP气候干冷暖湿波动频繁;3.4 ka BP以来气候以干旱为主.
英文摘要	The Hunshandake desert is located in the west of Inner Mongolia, China. This region is sensitive to climate change with annual temperature between 0. 9~5. 5 ℃ and annual precipitation between 240. 3~ 422. 6 mm. The samples were gotten at 5-cm intervals in the Xilinhaote section(43°52’36. 6"N, 116°05’ 34. l"E)which is 2. 8 m high and lies in the Hunshandake desert. In the laboratory the character of the grain-size composition and the changes of the grain-size parameters were analyzed. The relationships of the indica-tors of monsoon like M_z (mean particle diameter), M_d (median size), D/SC (the ratio of the coarse sands to the sum of fine sands and clay), the coarse sands fraction(>63 mum), sigma_1 (standard deviation) and the clay fraction(<2 Mm) with the monsoon variables were analyzed. The winter monsoon becomes strong when M_z, M_d and the clay fraction become low, but D/SC and o become high; on the contrary, the summer monsoon becomes strong when M_z, M_d and the clay fraction become high, but D/SC andsigma_1 become low. According to the relationships, the climate changes since 10 ka BP could be divided into 4 stages: 10. 7 ~9. 6 cal ka BP, cold and arid; 9.6~6 cal ka BP, warm and humid; 6~3. 4 cal ka BP, fluctuated between cold/arid and warm/humid; 3. 4 cal ka BP to present, arid predominated. The climate changes in the Hun-shandake desert are similar with other regions in China and in the world. It is mainly affected by the winter monsoon and the summer monsoon.
中文关键词	浑善达克沙地 ; 粒度 ; 全新世 ; 气候变化
英文关键词	the Hunshandake Desert grain-size Holocene climate change
语种	中文
国家	中国
收录类别	CSCD
WOS类目	GEOLOGY
WOS研究方向	Geology
CSCD记录号	CSCD:1870598
来源机构	中国科学院西北生态环境资源研究院
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/206949
作者单位	中国科学院,寒区旱区环境与工程研究所, 兰州, 甘肃 730000, 中国
推荐引用方式 GB/T 7714	张洪,靳鹤龄,苏志珠,等. 全新世浑善达克沙地粒度旋回及其反映的气候变化[J]. 中国科学院西北生态环境资源研究院,2005,25(1):1-7.
APA	张洪,靳鹤龄,苏志珠,&孙忠.(2005).全新世浑善达克沙地粒度旋回及其反映的气候变化.中国沙漠,25(1),1-7.
MLA	张洪,et al."全新世浑善达克沙地粒度旋回及其反映的气候变化".中国沙漠 25.1(2005):1-7.