干旱区生态环境知识资源中心(Arid): 河北坝上地区湖泊沉积物记录的中全新世干旱气候

Arid

	河北坝上地区湖泊沉积物记录的中全新世干旱气候
其他题名	Mid-Holocene Dry Climate Recorded by Lacustrine Sediments in Bashang Region of Hebei Province
	朱江玲; 刘鸿雁; 王红亚
ISSN	1000-0690
出版年	2007
卷号	27 期号:3 页码:380-384
中文摘要	根据位于典型草原带的河北坝上地区白诺尔及毗邻的内蒙古乌兰诺尔湖泊沉积物的K、Na、Ca、Mg等化学元素组成、总有机碳(TOC)与氧同位素(delta18O)的分析,以(K+ Na + Ca +Mg)/(Fe+Mn)值指示干旱度,delta~(18)O值指示夏季风的强弱,TOC值指示湖区植被状况,探讨了该地区~(14)C测年9.8～5.3 ka B.P.以来的气候变化与环境变迁.结果表明:两个剖面所记录的气候变化趋势相近,~(14)C测年7.0～5.7 ka B.P.为偏干期.反映夏季风强弱的氧同位素指标与干旱程度的变化没有明显的对应关系,说明夏季风引起的降水量变化不是气候干湿变化的主要影响因子,温度升高导致的蒸发加强可能对气候干旱化的影响更加明显.
英文摘要	Based on the analyses of chemical elements(K,Na,Ca,Mg,etc.),total organic content(TOC) and oxygen isotope(delta~(18)O) of two lacustrine sediment sequences from Bashang area of Hebei Province and its surrounding,(K+Ca+Na+Mg)/(Fe+Mn) was demonstrated to well indicate aridity change.delta~(18)O and TOC were adopted as proxies of intensity of summer monsoon and vegetation cover respectively.Climatic changes of this area during 9.8-5.3 ka B.P.were reconstructed.It is shown that climate changes of both sequences were quite similar and an arid stage from 7.0-5.7 ka B.P.was detected.However,the intensity of summer monsoon did not necessary correspond with the changes of aridity,implying that precipitation brought by summer monsoon in the study area was not the major factor of aridity change.On the other hand,evapotranspiration in the marginal area of Pacific monsoon,also called summer monsoon,was deterministic to the climatic aridity.
中文关键词	干旱气候 ; 全新世 ; 夏季风 ; 坝上地区
英文关键词	arid climate the Mid-Holocene summer monsoon Bashang area Hebei Province
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:2832173
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/220747
作者单位	北京大学环境学院, 地表过程分析与模拟教育部重点实验室, 北京 100871, 中国
推荐引用方式 GB/T 7714	朱江玲,刘鸿雁,王红亚. 河北坝上地区湖泊沉积物记录的中全新世干旱气候[J],2007,27(3):380-384.
APA	朱江玲,刘鸿雁,&王红亚.(2007).河北坝上地区湖泊沉积物记录的中全新世干旱气候.,27(3),380-384.
MLA	朱江玲,et al."河北坝上地区湖泊沉积物记录的中全新世干旱气候".27.3(2007):380-384.