Early Holocene Monsoon Evolution of High-resolution Stalagmite &delta;<sup>18</sup>O Records: in Henan Laomu Cave

ZHANG YinHuan; YANG Yan; YANG XunLin; YIN JianJun; HUANG Fan; REN XiaoFeng; ZHAO JingYao; LIU Xiao; NIE XuDong

doi:10.14027/j.cnki.cjxb.2015.01.014

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ZHANG YinHuan, YANG Yan, YANG XunLin, YIN JianJun, HUANG Fan, REN XiaoFeng, ZHAO JingYao, LIU Xiao, NIE XuDong. Early Holocene Monsoon Evolution of High-resolution Stalagmite δ18O Records: in Henan Laomu Cave[J]. Acta Sedimentologica Sinica, 2015, 33(1): 134-141. doi: 10.14027/j.cnki.cjxb.2015.01.014

Citation:

ZHANG YinHuan, YANG Yan, YANG XunLin, YIN JianJun, HUANG Fan, REN XiaoFeng, ZHAO JingYao, LIU Xiao, NIE XuDong. Early Holocene Monsoon Evolution of High-resolution Stalagmite δ¹⁸O Records: in Henan Laomu Cave[J]. Acta Sedimentologica Sinica, 2015, 33(1): 134-141. doi: 10.14027/j.cnki.cjxb.2015.01.014

Early Holocene Monsoon Evolution of High-resolution Stalagmite δ¹⁸O Records: in Henan Laomu Cave

doi: 10.14027/j.cnki.cjxb.2015.01.014

ZHANG YinHuan^1,2,
YANG Yan^{1,2
,},
YANG XunLin^1,2,
YIN JianJun^1,2,
HUANG Fan^1,2,
REN XiaoFeng^1,2,
ZHAO JingYao^1,2,
LIU Xiao^1,2,
NIE XuDong^1,2

1.
School of Geographical Sciences, Southwest University; Key Laboratory of the Three Gorges Reservoir Region's Eco-Environment, Chongqing University & Southwest University, Ministry of Education, Chongqing 400715;
2.
Laboratory of Geochemistry and Isotope, Southwest University, Chongqing 400715

Received Date: 2013-11-27
Rev Recd Date: 2014-05-05
Publish Date: 2015-02-10

Abstract

Based on 8 U/Th dates, 449 oxygen and carbon isotopic data from stalagmite LM2 from Laomu Cave, West Henan Province, China, a record of the Asian monsoon inter- decadal resolution sequence during 8.2~10.9 ka B.P. was established. The minimum δ¹⁸O value is -12‰, the maximum value is -8.2‰ and the vibration amplitude reaches 3.8‰. In the 10.13~10.9 ka B.P. sessions of early Holocene, the stalagmites in Jiuxian Cave, Laomu Cave and Dongshiya Cave reveals that monsoon stable in the period, but the stalagmites of Yamen Cave and Sanbao Cave in the southern China, polar ice cores GRIP record monsoon gradually. Differences of monsoon process of evolution between north and south China in the period may be related to climate response mechanism on the North and South China. Stalagmites LM2 recorded 8.2 ka, 9.5 ka, 10.2 ka and 10.9 ka weak monsoon event. Comparisons of LM2 to previously published early Holocene records show significant phase differences. The record of 9.3 ka weak monsoon event is not obvious in LM-2 stalagmite δ¹⁸O curve, but it recorded a weak monsoon event in 9.3~9.6 ka B.P. and similar to DSY09 (2009), Y1, HS-4 record. This indicated there was a weakening monsoon event in this time. The complexity oxygen isotope transport make it the different performance in north and south. In addition, LM2 stalagmite records the beginning of 8.2 ka B.P., the oxygen isotope curve showing a decline stage, and luffing up to 3 ‰, with Zhang et al proposing China "8200 phase" agreement by studying similar Wanxiang Cave. Northern China stalagmite showed the 8.2 ka cold event was staged event, while the south records revealed no showing phase characteristics, the reason for this need to more northern precision stalagmite records for further studying. The LM2 correlate within errors with Greenland ice core records, illustrating Asian monsoon and the North Atlantic climate change have fast atmospheric transmission. The stalagmite in Laomu Cave record confirms earlier work that suggested that Asia Monsoon is closely related to solar activity. Early Holocene Asian monsoon related with changing in solar radiation energy and climate condition on the high northern latitudes.
- stalagmites,
- Asian Monsoon,
- &delta,
- ¹⁸O,
- weak monsoon events,
- solar activity,
- Laomu Cave

References

[1]	覃嘉铭,袁道先,程海,等. 新仙女木及全新世早中期气候突变事件:贵州茂兰石笋氧同位素记录[J]. 中国科学(D辑):地球科学,2004,34(1):69-74.[Qin Jiaming, Yuan Daoxian, Cheng Hai, et al. Younger Dryas and the Early and Middle Holocene abrupt climate change events: Maolan stalagmite oxygen isotope record[J]. Science China (Seri. D): Earth Sciences, 2004, 34(1): 69-74.]
[2]	王绍武. 全新世气候变化[M]. 北京:气象出版社,2011:1-282. [Wang Shaowu. The Holocene Climate Change [M]. Beijing: China Meteorological Press, 2011: 1-282.]
[3]	王宁练,姚檀栋,Thompson L G. 全新世早期强降温事件的古里雅冰芯记录证据[J]. 科学通报,2002,47(11):818-823.[Wang Ninglian, Yao Tandong, Thompson L G. Early Holocene evidence of strong cooling event in Guliya Record [J]. Chinese Science Bulletin, 2002, 47(11): 818-823.]
[4]	余克服,陈特固,钟晋梁,等. 雷州半岛全新世高温期珊瑚生长所揭示的环境突变事件[J]. 中国科学(D辑):地球科学,2002,32(2):149-156.[Yu Kefu, Chen Tegu, Zhong Jinliang, et al. Coral growth environment revealed mutations time about high-temperature phase of Holocene in Leizhou Peninsula[J]. Science China (Seri. D): Earth Sciences, 2002, 32(2): 149-156.]
[5]	Haug G H, Hughen K A, Sigman D M, et al. Southward migration of the intertropical convergence zone through the Holocene[J]. Science, 2001, 293(5533): 1304-1308.
[6]	Southon J. A first step to reconciling the GRIP and GISP2 Ice-Core chronologies, 0-14,500 yr BP[J]. Quaternary Research, 2002, 57(1): 32-37.
[7]	杨琰,袁道先,程海,等. 末次冰消期亚洲季风突变事件的精确定年:以贵州衙门洞石笋为例[J]. 中国科学(D辑):地球科学,2010,40(2):199-210.[Yang Yan, Yuan Daoxian, Cheng Hai, et al. Precise dating of abrupt shifts in the Asian Monsoon during the last deglaciation based on stalagmite data from Yamen Cave, Guizhou province, China [J]. Science China (Seri. D): Earth Sciences, 2010, 40(2): 199-210.]
[8]	Shen C C, Cheng H, Edwards R L,et al. Measurement of attogram quantities of ²³¹Pa in dissolved and particulate fractions of seawater by isotope dilution thermal ionization mass spectroscopy[J]. Analytical Chemistry, 2003, 75(5): 1075-1079.
[9]	Hendy C H. The isotopic geochemistry of speleothems-I. The calculation of the effects of different modes of formation on the isotopic composition of speleothems and their applicability as palaeoclimatic indicators [J]. Geochimica et Cosmochimica Acta, 1971, 35(8): 801-824.
[10]	Dorale J A, Liu Zaihua. Limitations of Hendy Test criteria in judging the paleoclimatic suitability of speleothems and the need for replication [J]. Journal of Cave and Karst Studies, 2009, 71(1): 73-80.
[11]	Cheng Hai, Sinha A, Wang Xianfeng,et al. The Global Paleomonsoon as seen through speleothem records from Asia and the Americas[J]. Climate Dynamics, 2012, 39(5): 1045-1062.
[12]	Yuan Daoxian, Cheng Hai, Edwards R L,et al. Timing, duration, and transitions of the last interglacial Asian monsoon[J].Science, 2004, 304(5670): 575-578.
[13]	Neff U, Burns S J, Mangini A,et al. Strong coherence between solar variability and the monsoon in Oman between 9 and 6 kyr ago[J]. Nature, 2001, 411(6835): 290-293.
[14]	Fleitmann D, Burns S J, Mudelsee M,et al. Holocene forcing of the Indian Monsoon recorded in a stalagmite from Southern Oman [J]. Science, 2003, 300(5626): 1737-1739.
[15]	Hu Chaoyong, Henderson G M, Huang Junhua, et al. Quantification of Holocene Asian monsoon rainfall from spatially separated cave records [J]. Earth and Planetary Science Letters, 2008, 266(3/4): 221-232.
[16]	Cai Binggui, Edwards R L, Cheng Hai, et al. A dry episode during the Younger Dryas and centennial-scale weak monsoon events during the early Holocene: A high-resolution stalagmite record from southeast of the Loess Plateau, China[J]. Geophysical Research Letters, 2008, 35(2): L02705.
[17]	Cheng H, Fleitmann D, Edwards R L,et al. Timing and structure of the 8.2 kyr B.P. event inferred from δ¹⁸O records of stalagmites from China, Oman, and Brazil [J]. Geology, 2009, 37(11): 1007-1010.
[18]	Liu Y H, Henderson G M, Hu C Y,et al. Links between the East Asian monsoon and North Atlantic climate during the 8,200 year event[J]. Nature Geoscience, 2013, 6(2): 117-120.
[19]	Wu J Y, Wang Y J, Cheng H,et al. Stable isotope and trace element investigation of two contemporaneous annually-laminated stalagmites from northeastern China surrounding the “8.2 ka event” [J]. Climate of the Past Discussions, 2012, 8(3): 1591-1614.
[20]	邵晓华,汪永进,程海,等. 全新世季风气候演化与干旱事件的湖北神农架石笋记录[J]. 科学通报,2006, 51(1):80-86.[Shao Xiaohua, Wang Yognjin, Cheng Hai, et al. Holocene monsoon climate evolution and drought events Shennongjia stalagmite records [J].Chinese Science Bulletin, 2006, 51(1): 80-86.]
[21]	刘嘉麒,吕厚远, Negendank J,等. 湖光岩玛珥湖全新世气候波动的周期性[J]. 科学通报,2000, 45(11):1190-1195.[Liu Jiaqi, Lü Houyuan, Negendank J,et al. Holocene climatic fluctuations in the cyclical in Maar Lake Huguangyan[J].Chinese Science Bulletin, 2000, 45(11): 1190-1195.]
[22]	姜修洋,何尧启,沈川洲,等. 全新世黔北降水特征的石笋记录及适宜期结束时间在亚洲季风区的不等时性[J]. 科学通报,2012,57(1):73-79.[Jiang Xiuyang, He Yaoqi, Shen Chuanzhou,et al. Stalagmite-inferred Holocene precipitation in northern Guizhou province, China, and asynchronous termination of the Climatic Optimum in the Asian Monsoon territory[J]. Chinese Science Bulletin, 2012, 57(1): 73-79.]
[23]	方修琦,候光良. 中国全新世气温序列的集成重建[J]. 地理科学,2011,31(4):385-393.[Fang Xiuqi, Hou Guangliang. Synthetically reconstructed Holocene temperature change in China[J]. Scientia Geographica Sinica, 2011, 31(4): 385-393.]
[24]	Cai Yanjun, Tan Liangcheng, Cheng Hai, et al. The variation of summer monsoon precipitation in central China since the last deglaciation[J]. Earth and Planetary Science Letters, 2010, 291(1/2/3/4): 21-31.
[25]	Li Yu, Wang Nai'ang, Li Zhuolun, et al. Holocene climate cycles in northwest margin of Asian Monsoon[J]. Chinese Geographical Science, 2012, 22(4): 450-461.
[26]	张美良,朱晓燕,林玉石,等. 桂林洞穴滴水及现代碳酸钙(CaCO₃)沉积的碳同位素记录及其环境意义[J]. 地球学报,2009,30(5):634-642.[Zhang Meiliang, Zhu Xiaoyan, Lin Yushi, et al. Cave dripping water and carbon isotopic records of modern carbonate (CaCO₃) deposits: Stalagmite in Panlong Cave of Guilin and its environmental significance[J]. Acta Geoscientica Sinica, 2009, 30(5): 634-642.]
[27]	吴江滢,汪永进,董进国. 全新世东亚夏季风演化的辽宁暖和洞石笋δ¹⁸O记录[J]. 第四纪研究,2011,31(6):990-998.[Wu Jiangying, Wang Yongjin, Dong Jinguo. Changes in East Asian summer monsoon during the Holocene recorded by stalagmite δ¹⁸O records from Liaoning province[J]. Quaternary Sciences, 2011, 31(6): 990-998.]
[28]	董进国,张富. 本溪王家崴洞10500-5000a BP石笋记录及区域气候意义[J]. 海洋地质和第四纪地质,2012,32(1):119-125.[Dong Jinguo, Zhang Fu. The mid-holocene climate variation inferred from a dated stalagmite record from Wangjiawei Cave, Northeast China[J]. Marine Geology & Quaternary Geology, 2012, 32(1): 119-125.]

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通讯作者: 陈斌, bchen63@163.com

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沈阳化工大学材料科学与工程学院沈阳 110142

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Early Holocene Monsoon Evolution of High-resolution Stalagmite δ¹⁸O Records: in Henan Laomu Cave

1. School of Geographical Sciences, Southwest University; Key Laboratory of the Three Gorges Reservoir Region's Eco-Environment, Chongqing University & Southwest University, Ministry of Education, Chongqing 400715;

2. Laboratory of Geochemistry and Isotope, Southwest University, Chongqing 400715

Received Date: 2013-11-27

Rev Recd Date: 2014-05-05

Publish Date: 2015-02-10

Key words:

Abstract: Based on 8 U/Th dates, 449 oxygen and carbon isotopic data from stalagmite LM2 from Laomu Cave, West Henan Province, China, a record of the Asian monsoon inter- decadal resolution sequence during 8.2~10.9 ka B.P. was established. The minimum δ¹⁸O value is -12‰, the maximum value is -8.2‰ and the vibration amplitude reaches 3.8‰. In the 10.13~10.9 ka B.P. sessions of early Holocene, the stalagmites in Jiuxian Cave, Laomu Cave and Dongshiya Cave reveals that monsoon stable in the period, but the stalagmites of Yamen Cave and Sanbao Cave in the southern China, polar ice cores GRIP record monsoon gradually. Differences of monsoon process of evolution between north and south China in the period may be related to climate response mechanism on the North and South China. Stalagmites LM2 recorded 8.2 ka, 9.5 ka, 10.2 ka and 10.9 ka weak monsoon event. Comparisons of LM2 to previously published early Holocene records show significant phase differences. The record of 9.3 ka weak monsoon event is not obvious in LM-2 stalagmite δ¹⁸O curve, but it recorded a weak monsoon event in 9.3~9.6 ka B.P. and similar to DSY09 (2009), Y1, HS-4 record. This indicated there was a weakening monsoon event in this time. The complexity oxygen isotope transport make it the different performance in north and south. In addition, LM2 stalagmite records the beginning of 8.2 ka B.P., the oxygen isotope curve showing a decline stage, and luffing up to 3 ‰, with Zhang et al proposing China "8200 phase" agreement by studying similar Wanxiang Cave. Northern China stalagmite showed the 8.2 ka cold event was staged event, while the south records revealed no showing phase characteristics, the reason for this need to more northern precision stalagmite records for further studying. The LM2 correlate within errors with Greenland ice core records, illustrating Asian monsoon and the North Atlantic climate change have fast atmospheric transmission. The stalagmite in Laomu Cave record confirms earlier work that suggested that Asia Monsoon is closely related to solar activity. Early Holocene Asian monsoon related with changing in solar radiation energy and climate condition on the high northern latitudes.

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Reference (28)

[1]	覃嘉铭,袁道先,程海,等. 新仙女木及全新世早中期气候突变事件:贵州茂兰石笋氧同位素记录[J]. 中国科学(D辑):地球科学,2004,34(1):69-74.[Qin Jiaming, Yuan Daoxian, Cheng Hai, et al. Younger Dryas and the Early and Middle Holocene abrupt climate change events: Maolan stalagmite oxygen isotope record[J]. Science China (Seri. D): Earth Sciences, 2004, 34(1): 69-74.]
[2]	王绍武. 全新世气候变化[M]. 北京:气象出版社,2011:1-282. [Wang Shaowu. The Holocene Climate Change [M]. Beijing: China Meteorological Press, 2011: 1-282.]
[3]	王宁练,姚檀栋,Thompson L G. 全新世早期强降温事件的古里雅冰芯记录证据[J]. 科学通报,2002,47(11):818-823.[Wang Ninglian, Yao Tandong, Thompson L G. Early Holocene evidence of strong cooling event in Guliya Record [J]. Chinese Science Bulletin, 2002, 47(11): 818-823.]
[4]	余克服,陈特固,钟晋梁,等. 雷州半岛全新世高温期珊瑚生长所揭示的环境突变事件[J]. 中国科学(D辑):地球科学,2002,32(2):149-156.[Yu Kefu, Chen Tegu, Zhong Jinliang, et al. Coral growth environment revealed mutations time about high-temperature phase of Holocene in Leizhou Peninsula[J]. Science China (Seri. D): Earth Sciences, 2002, 32(2): 149-156.]
[5]	Haug G H, Hughen K A, Sigman D M, et al. Southward migration of the intertropical convergence zone through the Holocene[J]. Science, 2001, 293(5533): 1304-1308.
[6]	Southon J. A first step to reconciling the GRIP and GISP2 Ice-Core chronologies, 0-14,500 yr BP[J]. Quaternary Research, 2002, 57(1): 32-37.
[7]	杨琰,袁道先,程海,等. 末次冰消期亚洲季风突变事件的精确定年:以贵州衙门洞石笋为例[J]. 中国科学(D辑):地球科学,2010,40(2):199-210.[Yang Yan, Yuan Daoxian, Cheng Hai, et al. Precise dating of abrupt shifts in the Asian Monsoon during the last deglaciation based on stalagmite data from Yamen Cave, Guizhou province, China [J]. Science China (Seri. D): Earth Sciences, 2010, 40(2): 199-210.]
[8]	Shen C C, Cheng H, Edwards R L,et al. Measurement of attogram quantities of ²³¹Pa in dissolved and particulate fractions of seawater by isotope dilution thermal ionization mass spectroscopy[J]. Analytical Chemistry, 2003, 75(5): 1075-1079.
[9]	Hendy C H. The isotopic geochemistry of speleothems-I. The calculation of the effects of different modes of formation on the isotopic composition of speleothems and their applicability as palaeoclimatic indicators [J]. Geochimica et Cosmochimica Acta, 1971, 35(8): 801-824.
[10]	Dorale J A, Liu Zaihua. Limitations of Hendy Test criteria in judging the paleoclimatic suitability of speleothems and the need for replication [J]. Journal of Cave and Karst Studies, 2009, 71(1): 73-80.
[11]	Cheng Hai, Sinha A, Wang Xianfeng,et al. The Global Paleomonsoon as seen through speleothem records from Asia and the Americas[J]. Climate Dynamics, 2012, 39(5): 1045-1062.
[12]	Yuan Daoxian, Cheng Hai, Edwards R L,et al. Timing, duration, and transitions of the last interglacial Asian monsoon[J].Science, 2004, 304(5670): 575-578.
[13]	Neff U, Burns S J, Mangini A,et al. Strong coherence between solar variability and the monsoon in Oman between 9 and 6 kyr ago[J]. Nature, 2001, 411(6835): 290-293.
[14]	Fleitmann D, Burns S J, Mudelsee M,et al. Holocene forcing of the Indian Monsoon recorded in a stalagmite from Southern Oman [J]. Science, 2003, 300(5626): 1737-1739.
[15]	Hu Chaoyong, Henderson G M, Huang Junhua, et al. Quantification of Holocene Asian monsoon rainfall from spatially separated cave records [J]. Earth and Planetary Science Letters, 2008, 266(3/4): 221-232.
[16]	Cai Binggui, Edwards R L, Cheng Hai, et al. A dry episode during the Younger Dryas and centennial-scale weak monsoon events during the early Holocene: A high-resolution stalagmite record from southeast of the Loess Plateau, China[J]. Geophysical Research Letters, 2008, 35(2): L02705.
[17]	Cheng H, Fleitmann D, Edwards R L,et al. Timing and structure of the 8.2 kyr B.P. event inferred from δ¹⁸O records of stalagmites from China, Oman, and Brazil [J]. Geology, 2009, 37(11): 1007-1010.
[18]	Liu Y H, Henderson G M, Hu C Y,et al. Links between the East Asian monsoon and North Atlantic climate during the 8,200 year event[J]. Nature Geoscience, 2013, 6(2): 117-120.
[19]	Wu J Y, Wang Y J, Cheng H,et al. Stable isotope and trace element investigation of two contemporaneous annually-laminated stalagmites from northeastern China surrounding the “8.2 ka event” [J]. Climate of the Past Discussions, 2012, 8(3): 1591-1614.
[20]	邵晓华,汪永进,程海,等. 全新世季风气候演化与干旱事件的湖北神农架石笋记录[J]. 科学通报,2006, 51(1):80-86.[Shao Xiaohua, Wang Yognjin, Cheng Hai, et al. Holocene monsoon climate evolution and drought events Shennongjia stalagmite records [J].Chinese Science Bulletin, 2006, 51(1): 80-86.]
[21]	刘嘉麒,吕厚远, Negendank J,等. 湖光岩玛珥湖全新世气候波动的周期性[J]. 科学通报,2000, 45(11):1190-1195.[Liu Jiaqi, Lü Houyuan, Negendank J,et al. Holocene climatic fluctuations in the cyclical in Maar Lake Huguangyan[J].Chinese Science Bulletin, 2000, 45(11): 1190-1195.]
[22]	姜修洋,何尧启,沈川洲,等. 全新世黔北降水特征的石笋记录及适宜期结束时间在亚洲季风区的不等时性[J]. 科学通报,2012,57(1):73-79.[Jiang Xiuyang, He Yaoqi, Shen Chuanzhou,et al. Stalagmite-inferred Holocene precipitation in northern Guizhou province, China, and asynchronous termination of the Climatic Optimum in the Asian Monsoon territory[J]. Chinese Science Bulletin, 2012, 57(1): 73-79.]
[23]	方修琦,候光良. 中国全新世气温序列的集成重建[J]. 地理科学,2011,31(4):385-393.[Fang Xiuqi, Hou Guangliang. Synthetically reconstructed Holocene temperature change in China[J]. Scientia Geographica Sinica, 2011, 31(4): 385-393.]
[24]	Cai Yanjun, Tan Liangcheng, Cheng Hai, et al. The variation of summer monsoon precipitation in central China since the last deglaciation[J]. Earth and Planetary Science Letters, 2010, 291(1/2/3/4): 21-31.
[25]	Li Yu, Wang Nai'ang, Li Zhuolun, et al. Holocene climate cycles in northwest margin of Asian Monsoon[J]. Chinese Geographical Science, 2012, 22(4): 450-461.
[26]	张美良,朱晓燕,林玉石,等. 桂林洞穴滴水及现代碳酸钙(CaCO₃)沉积的碳同位素记录及其环境意义[J]. 地球学报,2009,30(5):634-642.[Zhang Meiliang, Zhu Xiaoyan, Lin Yushi, et al. Cave dripping water and carbon isotopic records of modern carbonate (CaCO₃) deposits: Stalagmite in Panlong Cave of Guilin and its environmental significance[J]. Acta Geoscientica Sinica, 2009, 30(5): 634-642.]
[27]	吴江滢,汪永进,董进国. 全新世东亚夏季风演化的辽宁暖和洞石笋δ¹⁸O记录[J]. 第四纪研究,2011,31(6):990-998.[Wu Jiangying, Wang Yongjin, Dong Jinguo. Changes in East Asian summer monsoon during the Holocene recorded by stalagmite δ¹⁸O records from Liaoning province[J]. Quaternary Sciences, 2011, 31(6): 990-998.]
[28]	董进国,张富. 本溪王家崴洞10500-5000a BP石笋记录及区域气候意义[J]. 海洋地质和第四纪地质,2012,32(1):119-125.[Dong Jinguo, Zhang Fu. The mid-holocene climate variation inferred from a dated stalagmite record from Wangjiawei Cave, Northeast China[J]. Marine Geology & Quaternary Geology, 2012, 32(1): 119-125.]

Early Holocene Monsoon Evolution of High-resolution Stalagmite δ¹⁸O Records: in Henan Laomu Cave

doi: 10.14027/j.cnki.cjxb.2015.01.014

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Early Holocene Monsoon Evolution of High-resolution Stalagmite δ¹⁸O Records: in Henan Laomu Cave

doi: 10.14027/j.cnki.cjxb.2015.01.014

1. School of Geographical Sciences, Southwest University; Key Laboratory of the Three Gorges Reservoir Region's Eco-Environment, Chongqing University & Southwest University, Ministry of Education, Chongqing 400715;

2. Laboratory of Geochemistry and Isotope, Southwest University, Chongqing 400715

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Early Holocene Monsoon Evolution of High-resolution Stalagmite δ18O Records: in Henan Laomu Cave

doi: 10.14027/j.cnki.cjxb.2015.01.014

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Early Holocene Monsoon Evolution of High-resolution Stalagmite δ18O Records: in Henan Laomu Cave

doi: 10.14027/j.cnki.cjxb.2015.01.014

1. School of Geographical Sciences, Southwest University; Key Laboratory of the Three Gorges Reservoir Region's Eco-Environment, Chongqing University & Southwest University, Ministry of Education, Chongqing 400715; 2. Laboratory of Geochemistry and Isotope, Southwest University, Chongqing 400715

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Early Holocene Monsoon Evolution of High-resolution Stalagmite δ¹⁸O Records: in Henan Laomu Cave

Early Holocene Monsoon Evolution of High-resolution Stalagmite δ¹⁸O Records: in Henan Laomu Cave

1. School of Geographical Sciences, Southwest University; Key Laboratory of the Three Gorges Reservoir Region's Eco-Environment, Chongqing University & Southwest University, Ministry of Education, Chongqing 400715;

2. Laboratory of Geochemistry and Isotope, Southwest University, Chongqing 400715