Climate evolution response by arsenic component from lacustrine sediments in westerly region:a case study on Barkol Lake,Xinjiang
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摘要: 巴里坤湖是我国西风区古气候环境演变研究的理想区域.根据BLK-1剖面多指标建立了巴里坤湖9000cal a BP以来的时间序列,得出其气候演变的过程.砷是自然界中具有毒性的微量元素,单质砷少,主要吸附在其他矿物上.文章结合巴里坤湖古气候演变及砷元素含量的波动变化,发现砷元素变化响应气候环境的演变的:气候冷干时期,砷含量较多;而暖湿时期则相对少.此外,砷含量的变化很好地指示了全新世的气候突变事件.巴里坤湖沉积物中砷元素主要来源于湖泊周边基岩受物理风化产生的碎屑,并经由风力带入湖中沉积.干旱的气候环境下,砷的沉积速率较湿润期有明显变化.本研究表明,砷对于我国西风区的古气候环境演变及气候突变事件具有指示作用;砷沉积速率的突变表明在干旱气候环境条件下,砷可能会较其他元素更为敏感.不同气候环境下砷元素的来源及波动,也为砷污染的防治提供参考.
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关键词:
- 敏感
Abstract: Located in the westerly region，Lake Barkol is the ideal research area of the paleoclimate and environment evolution. Based on the multi-proxy analysis of BLK-1 profile, the climate and environmental changes over the past 9000 is established. Arsenic is a poisonous element in nature, which comes mainly from the surrounding bedrock and is brought into the lake by wind after the physical weathering. The research has shown that higher Arsenic values could reflect relatively cold and arid conditions, vice versa. Moreover, arsenic is also a good indicator of the abrupt climate events in Barkol lake during the Holocene. Arsenic is so sensitive that its deposition rate is similar with other elements in the wet period but has an obvious change in arid period. We suggests that the arsenic has valuable potential to indicate past climatic changes in the westerly-influenced arid region. The research about the source of arsenic is conducive to the study of paleoclimate and the prevention of arsenic pollution.-
Keywords:
- sensitivity
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Holocene climate change In tropical Africa[J].Science,2002,298:589-593.
[32] Hardt B,Rowe H D,Springer G S,et al.The seasonality of East central North American precipitation based on three coeval Holocene speleothems from southern West Virginia[J].Earth and Planetary Science Letters,2010,295:342-348.
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[1] 钟 巍,张 进,尹焕玲,等.新疆巴里坤湖全新世湖泊沉积物稳定氮同位素的气候与环境意义研究[J].华南师范大学学报(自然科学版),2013,45,(6):182-188.
[2] 薛积彬,钟 巍.新疆巴里坤湖全新世环境记录及区域对比研究[J].第四纪研究,2008,28(4):610-620.
[3] 薛积彬,钟 巍.新疆巴里坤湖全新世气候环境变化与高低纬间气候变化的关联[J].中国科学:地球科学,2011,41(1):61-73.
[4] 蔡 颖,钟 巍,薛积彬,等.干旱区湖泊沉积物腐殖化度的古气候指示意义—以新疆巴里坤湖为例[J].湖泊科学,2009,21(1):
69-76.
[5] 陈发虎,黄小忠,杨美临,等.亚洲中部干旱区全新世气候变化的西风模式[J].第四纪研究,2006,26(6):881-887.
[6] Shen J, Liu X Q, Wang S M, et al.Paleoclimatic changes in the Qinghai lake area during the last 18000 years.Quat Int,2005,136:131–140.
[7] 吴艳宏,王苏民,侯新花.青藏高原中部错鄂全新世湖泊沉积物年代学研究[J].中国科学D辑:地球科学,2006,36(8):713–722.
[8] 韩淑媞,瞿 章.北疆巴里坤湖内陆型全新世气候特征[J].中国科学(B)辑,1992,(11):1201-1209.
[9] WEDEPOHL K.The composition of the continental crust[J].Geochimica et Cosmochimica Acta,1995,59(7):1217-1232.
[10] Smedley,P L.Kinniburgh,D G.A review of the source,behaviour and distribution of arsenic in natural waters[J].Appl.Geochem.2002,17,517–568.
[11] Houyun Zhou, Alan Greig, ChenFeng You,et al.Arsenic in a Speleothem from Central China:Stadial-Interstadial Variations and Implications[J].Environmental Science&Technology,2011,45,1278–1283.
[12] 吴敬禄,沈 吉,王苏民,等.新疆艾比湖地区湖泊沉积记录的早全新世气候环境特征[J].中国科学(D)辑,2003,33(6):569-575
[13] Ji J F,Shen J,Balsam W, et al.Asian monsoon oscillations in the northeastern Qinghai-Tibet Plateau since the late glacial as interpreted from visibler eflectance of Qinghai Lake sediments[J].Earth and Planetary Science Letters,2005,233:61-70.
[14] Yu S Y, Zhu C,Wang F.Radiocarbon constraints on the Holocene flood deposits of the Ning-Zhen Mountains, LowerYangt ze River area of China[J].Journal of Quaternary Science,2003,18:521- 525.
[15] Alley R B.Ice-core evidence of abrupt climate change[J].Proceedings of the National Academy of Sciences USA,2000,97:1331-1334.
[16] Willemse N W, Tornqvist T E.Holocene century-cale temperature variability from West Greenland lake records[J].Geology, 1999,27:580-584.
[17] 施雅风,孔昭宸,王苏民,等.中国全新世大暖气波动与重要事件[J].中国科学(B)辑,1992,12:1300-1308.
[18] 程 捷,唐德翔,张绪教,等.粘土矿物在黄河源区古气候研究中的应用[J].现代地质,2003,17(1):47-51.
[19] Wang Weiguo,Feng Zhaodong,Li Xinqing,et al.Abrupt climate change events in the Holocene of Gun Nuur Lake records in Northern Mongolian[J].Chinese Science Bullet in,2004,49(1):27-33.
[20] 李志飞,吕雁斌,陶士臣,等.新疆东部全新世气候变化特征[J].海洋地质与第四纪质,2008,28(6):107-112.
[21] 韩淑媞.北疆巴里坤湖全新世环境变迁序列[J].地质科学,1992(增刊): 247-260.
[22] 陈发虎,吴 薇,朱 艳,等.阿拉善高原中全新世干旱事件的湖泊记录研究[J].科学通报,2004,49(1):1-9．
[23] 林瑞芬,卫克勤,Gasse F,等.新疆玛纳斯湖沉积柱样的古气候古环境研究[J].地球化学,1996,25(1):63-72.
[24] 李国胜.艾比湖冰消期以来δ13C记录与突变气候事件研究[J].科学通报,1993,38(22):2069-2071.
[25] Jin Z D,Wu Y H,Zhang X H,et al.Role of late glacial to Mid-Holocene climate in catchment weathering in the central Tibetan Plateau[J].Quaternary Research,2005,63(2):161-170
[26] Hu C Y,Henderson G M,Huang J H,et al.Quantification of Holocene Asian monsoon rain fall from spatially separated cave records[J].Earth and Planetary Science Letters,2008,266:221-232.
[27] 刘浴辉,孙 霞,郭彩青.中国全新世4.2kaBP气候事件及其对古文明的影响[J].地质科技情报,2013,32(1):99-106.
[28] 吴文祥,刘东生.4000a BP前后东亚季风变迁与中原周围地区新石器文化的衰落[J].第四纪研究,2004,24(3):278-284.
[29] 王绍武,闻新宇,黄建斌.五帝时代(距今6-4千年)中国的气候[J].中国历史地理论丛,2011,26(2):5-12.
[30] 吴文祥,胡 莹,周 扬.气候突变与古文明衰落[J].古地理学报,2009,11(4):455-463
[31] Thompson L G,Mosley-Thompson E,Davis M E,et al.Kilimanjaro ice core records:Evidence of
Holocene climate change In tropical Africa[J].Science,2002,298:589-593.
[32] Hardt B,Rowe H D,Springer G S,et al.The seasonality of East central North American precipitation based on three coeval Holocene speleothems from southern West Virginia[J].Earth and Planetary Science Letters,2010,295:342-348.
[33] Bond G,Showers W,Cheseby M,et al.A pervasive millennial scale cycle in North Atlantic Holocene and glacial climates[J].Science,1997,278(14):1257-1266.
[34] 郭华明,杨素珍,沈照理.富砷地下水研究进展[J]地球科学进展,2007,22(11):1109-1117.
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