干旱区生态环境知识资源中心(Arid): 昆仑山北麓阿羌黄土剖面AQS3层段记录的末次间冰阶千年尺度的气候波动

Arid

	昆仑山北麓阿羌黄土剖面AQS3层段记录的末次间冰阶千年尺度的气候波动
其他题名	MILLENNIAL-SCALE CLIMATE FLUCTUATIONS DURING THE LAST INTERSTADIAL RECORDED IN THE AQS3 SEGMENT OF THE AQIANG LOESS SECTION IN THE NORTH PIEDMONT OF THE KUNLUN MOUNTAINS
	李保生 1; 温小浩 1; 李森 3; 董光荣 ; 杜恕环 1; 欧先交 1; 邱世藩 1; 王贵勇 3; 李志文 1; 牛东风 1
ISSN	1001-7410
出版年	2008
卷号	28 期号:1 页码:140-149
中文摘要	通过对昆仑山北麓阿羌黄土剖面AQS3层段的年代测试、粒度参数（mZ和sigma）以及主要氧化物（SiO_2，Al_2O_3，TOFE（Fe_2O_3＋FeO）和（Al_2O_3＋TOFE）／SiO_2比值）分析，并结合区域相关地层反映的古环境和腹足类化石指示的古生态，认为AQS3记录了末次间冰阶19个旋回的干冷与暖湿的气候波动。其中，15个具有千年尺度旋回的各个温暖期能够较好地与GRIP冰芯氧同位素曲线中的DO事件在时代和气候性质上进行一一对比。可能是由于地处毗邻冰川山麓、加之海拔较高，故该层段粒度与主要氧化物显示的气候变动的幅度并不大，然而却相当敏感。不仅于此，这种千年尺度的温暖气候变化在昆仑山北麓及其近邻区域也有明显的表现。例如，在昆仑山北麓普鲁地层剖面中，指示暖干气候作用下形成的含石膏等盐类的砂土砾石层的TL年龄为距今31000年、45500～41600年、45900年和54500年，可以依次与GRIP delta~(18)O的中的间冰段D／O6，D／O12，D／O13和D／O15进行对比；在阿尔金山北麓，类似的并具有荒漠漆的砂土砾石层的TL年龄为37200aB．P．和59700aB．P．，分别相当于D／O9和D／O17间冰段；在塔克拉玛干沙漠腹地的高阶地（海拔1310m），可能代表了剧烈升温的气候背景下，环塔里木盆地四周高山冰雪大量消融导致的塔克拉玛干沙漠腹地的大湖期，其日历年为33197aB．P．，与GISP2冰芯氧同位素曲线在33000aB．P．的暖阶段相当。发生在昆仑山北麓及毗邻区域AQS3时期若干温暖阶段的地层学证据以及其在时间上能够与GRIP和GISP2冰芯氧同位素曲线相关暖峰的耦合，表明由阿羌剖面末次间冰阶粒度和主氧化物峰谷变化反映出来的多次冷暖波动，其根本原因还是受到北半球D／O振荡的强烈影响。
英文摘要	Based on the age determination,grain-size parameters Mz and sigma, contents of SiO_2 and Al_2O_3 ,TOFE（Fe_2O_3 ＋ FeO） and the ratio of（ Al_2O_3 ＋ TOFE）/SiO_2 for the AQS3 segment of the Aqiang loess section in the north piedmont of the Kunlun Mountains, together with the paleoenvironment reconstructed by related strata and the paleoecology by fossil gastropods in this region,we conclude that the AQS3 segment recorded 19 cycles of cold-arid and warm-humid climatic fluctuations during the last interstadial. Each warm phase in the 15 millennial-scale cycles corresponds well with the D/O events in the delta~(18)O curve of GRIP in terms of ages and climatic features respectively. Maybe as being in the piedmont with glaciers nearby and in a high altitude, the climatic fluctuations indicated by grain-sizes and major oxides of this segment are small, but very sensitive. Moreover, similar warm climate fluctuations at the millennial scale are recorded clearly in the north piedmont of the Kunlun Mountains and its adjacent area. For example, the TL ages of sandy soil and gravel layers with such saline minerals as gypsum formed under the control of warm-arid climate in the Pulu stratigraphic section in the north piedmont of the Kunlun Mountains are 31000aB. P., 45500aB. P. to 41600aB. P., 45900aB. P. and 54500aB. P., corresponding to the interstadials D/O6, D/O12, D/O13, and D/O15 in the delta~(18)O curve of GRIP, respectively. Similarly, those with desert lacquer in the north piedmont of the Ahunshan Moutains are 37200aB. P. and 59700aB. P.,corresponding to the interstadials D/O9 and D/O17,respectively. The Megalake Period on the high terraces（ 1310m above sea level）in the hinterland of the Taklimakan Desert resulted from plenty of ice-snow melt runoff from the high mountains around the Tarim Basin on a climatic background of rapid warming has its calendar age of 33197aB. P.,corresponding to the warm phase of 33000aB. P. in the delta~(18)O curve of GRIP. The stratigraphic evidences on several warm phases of the AQS3 segment in the north piedmont of the Kunlun Mountains and its adjacent area, and the coupling relationship with the corresponding warm peaks in the GRIP and GRIP2 delta~(18)O records show that the climatic fluctuations indicated by grain-sizes and major oxides of the last interstadial in the AQS3 segment are fundamentally and strongly influenced by the D/O oscillation in the Northern Hemisphere.
中文关键词	昆仑山北麓 ; 阿羌黄土剖面 ; AQS3层段 ; 末次间冰阶 ; 千年尺度气候变化
英文关键词	north piedmont of the Kunlun Mountains Aqiang loess section AQS3 segment last interstadial millennial-scale climate fluctuation
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:3256552
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/2XILL650/222181
作者单位	1.华南师范大学地理科学学院, 广州, 广东 510631, 中国; 2.香港大学地理及地质系, Hong Kong; 3.佛山科学技术学院资源环境系, 佛山, 广东 528000, 中国
推荐引用方式 GB/T 7714	李保生,温小浩,李森,等. 昆仑山北麓阿羌黄土剖面AQS3层段记录的末次间冰阶千年尺度的气候波动[J]. 中国科学院西北生态环境资源研究院,2008,28(1):140-149.
APA	李保生.,温小浩.,李森.,董光荣.,杜恕环.,...&牛东风.(2008).昆仑山北麓阿羌黄土剖面AQS3层段记录的末次间冰阶千年尺度的气候波动.,28(1),140-149.
MLA	李保生,et al."昆仑山北麓阿羌黄土剖面AQS3层段记录的末次间冰阶千年尺度的气候波动".28.1(2008):140-149.