近150a来南红山湖的地球化学特征及环境意义

doi:10.13249/j.cnki.sgs.2002.01.39

地理科学 ›› 2002, Vol. 22 ›› Issue (1): 39-42.doi: 10.13249/j.cnki.sgs.2002.01.39

近150a来南红山湖的地球化学特征及环境意义

陈玲^1,2, 朱立平², 张青松²

1. 中国科学院地理科学与资源研究所, 北京, 100101;
2. 北京师范大学环境演变与自然灾害教育部重点实验室, 北京, 100875

收稿日期:2000-07-29 修回日期:2000-10-10 出版日期:2002-01-20 发布日期:2002-01-20
基金资助:
国家重点基础研究规划项目(G199804080)、中科院重大与特别支持项目(KZ951-A1-204、KZ95T-06)及中科院地理科学与资源研究所创新项目(CXIOG-A01-002)资助.

The Significance of Lake Sediments Geochemistry in Environmental Reconstruction of South Hongshan Lake, Northwestern Tibetan Plateau During the Past 150 Years

CHEN Ling^1,2, ZHU Li-ping², ZHANG Qing-song²

1. Institute of Geographic Sciences and Natural Resources Research, the Chinese Academy of Sciences, Beijing 100101;
2. Key Laboratory of Environmental Change and National Disaster, Ministry of Education of China, Beijing Normal University, Beijing 100875

Received:2000-07-29 Revised:2000-10-10 Online:2002-01-20 Published:2002-01-20

摘要/Abstract

摘要： 通过对西昆仑山南红山湖的沉积地球化学特征的分析,恢复了南红山湖区近150a来的环境变化.19世纪50年代初～19世纪80年代中期,气候受小冰期末次波动的影响,以冷湿为特点.19世纪80年代中期～1997年,处于小冰期后回暖期,以暖干趋势为主.其中19世纪80年代中期～20世纪20年代初,以暖干为特点;20世纪20年代初～20世纪中叶,气候较干燥,而且温度与湿度的结合较复杂,属于冷干-暖湿交替的气候类型;20世纪中叶～1997年,气候总特征以暖干为主,尤其是1990年以后,温度升高趋势明显,气候干燥.从近150a湖泊变化的整体趋势看,随着时间的推移,南红山湖在逐渐萎缩.就湖区的气候变化与西昆仑山古里雅冰芯所恢复的气温、降水变化及与较近的两个站点的气象记录进行了对比,认为该地区与古里雅冰芯地区受相同的气候系统控制;高原上区域间存在气候差异;应开展多尺度、高分辨率的多种代用资料的研究.

Abstract: A 107-cm piston core (SHC-2) was drilled with water depth of 5m in South Hongshan Lake, northwest Tibet in 1998. Based upon the 0.72cm/a of modern sedimentary rate that was tested by ²¹⁰Pb method and also calibrated by ¹³⁷Cs method as well as the 1cm interval sample cutting level, a lake sedimentary record with 150 yrs long and 1.4 yrs resolution was obtained. The values of TOC, TN, C/N, CaCO₃, Sr/Ba and Fe/Mn had clear environmental significance and well reflected the environmental changes. Geochemical multi proxies of lacustrine sediments showed that the environmental changes during the past 150 years could be reconstructed as follows: Stage 1 (1850s-1880s) is a cold wet period, because it is affected by the climatic variation after the Little Ice Age. Stage 2 (1880s-) is a warm dry period. But the period from 1920s to 1950s is warm wet and cold dry type. After the 1990 the warming tendency is marked in the curve of TOC and TN. In the view of general trend in the past 150 years, South Hongshan Lake was shrinking gradually.

中图分类号:

X142/X144

陈玲, 朱立平, 张青松. 近150a来南红山湖的地球化学特征及环境意义[J]. 地理科学, 2002, 22(1): 39-42.

CHEN Ling, ZHU Li-ping, ZHANG Qing-song. The Significance of Lake Sediments Geochemistry in Environmental Reconstruction of South Hongshan Lake, Northwestern Tibetan Plateau During the Past 150 Years[J]. SCIENTIA GEOGRAPHICA SINICA, 2002, 22(1): 39-42.

参考文献

[1] Hegerl G. The past as guide to the future[J]. Nature, 1998,(392):758-759.
[2] 汪品先,翦知.寻求高分辨率的古环境记录[J].第四纪研究,1999,(1):1～17.
[3] 王苏民,薛滨,张振克.研究季风区历史时期湖泊环境演化的意义[J].湖泊科学,1998,10(2):1～4.
[4] Steven M Colman. Continental drilling for paleoclimate records. In: PAGES Workshop Report[R]. 1996, Series 96-4.
[5] 王苏民,李建仁.湖泊沉积-研究历史气候的有效手段[J]科学通报,1990,36(1):54～56.
[6] 张振克,王苏民.中国湖泊沉积记录的环境演变:研究进展与展望[J].地球科学进展,1999,14(4):417～421.
[7] 杨惟理,王国,张青松,北极阿拉斯加巴罗湾泻湖沉积地球化学特征及其环境意义[J].地理学报,1997,52(1):80～88.
[8] GasseF, AmoldM, FontesJC, etal. A13, 000 - year climate record from western Tibet[J]. Nature, 1991, (353): 742 -745.
[9] Gasse F, Fontes J C, Campo E Van, et al. Holocene environmental changes in Bangong Co basin (Western Tibet). Part 4:Discussion and conclusions[J]. Palaeogeography, Palaeoclimatology, Palaeoecology, 1996, (120): 79-92.
[10] 李世杰,李树德.西昆仑山甜水海两个钻孔的研究及其意义[J].冰川冻土,1991,13(2):187～188.
[11] 姚檀栋,秦大河,田立德,等.青藏高原2Ka来温度与降水变化-古里雅冰芯记录[J].中国科学(D辑),1996,26(4):348～353.
[12] 万国江现代沉积年分辨的¹³⁷Cs计年-以云南洱海和贵州红枫湖为例[J].第四纪研究,1999,(1):73～80
[13] 薛滨,王苏民,吴敬禄,等青藏高原东北部末次间冰期以来的古气候-以若尔盖盆地RM孔分析为例[J]海洋与湖沼,1999,30(3):327～332
[14] 薛滨,瞿文川,吴艳宏,等.太湖晚冰期-全新世气候、环境变化的沉积记录[J].湖泊科学,1998,10(2):30～36
[15] 吴艳红,吴瑞金,薛滨,等.13 ka B P以来滇池地区古环境演化[J].湖泊科学,1998,10(2):5～9
[16] 王苏民,余源盛,吴瑞金,等.岱海-湖泊环境与气候变化[M].合肥:中国科技大学出版社,1990
[17] Meyers P A. Preservation of elemental and isotopic source identification of sedimentary organic matter[J]. Chem. Geol., 1994, (114): 289-302.
[18] 张振克,吴瑞金,王苏民,等.近2600年来内蒙古居延海湖泊沉积记录的环境变迁[J].湖泊科学,1998,10(2):44～51.
[19] 李世杰,区荣康,朱照宇,等.24万年来西昆仑山甜水海湖岩芯碳酸盐含量变化与气候环境演化[J]湖泊科学,1998,10(2):58～65.
[20] 姚檀栋,刘晓东,王宁练青藏高原地区的气候变化幅度问题[J].科学通报,2000,45(1):98～106
[21] 冯松,汤懋苍,王冬梅.青藏高原是我国气候变化启动区的新证据[J]科学通报,1998,43(6):633～636

近150a来南红山湖的地球化学特征及环境意义

The Significance of Lake Sediments Geochemistry in Environmental Reconstruction of South Hongshan Lake, Northwestern Tibetan Plateau During the Past 150 Years

PDF (PC)

赞

可视化

被引次数

摘要/Abstract

引用本文

使用本文

参考文献

相关文章 0

Metrics

本文评价

推荐阅读 0