MIS3以来黄土高原东南部石笋阶段性沉积记录的夏季风演化
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摘要
基于山西龙洞8个铀钍年代和100个氧同位素数据(δ~(18 )O)重建了深海氧同位素(MIS)3阶段以来东亚夏季风演化历史。石笋L8沉积并不连续,主要生长在58.0~54.5,27.1~18.0和6.8~3.9kaBP 3个阶段。不同于季风边缘区其他洞穴记录,石笋δ~(18 )O值在24.5kaBP突然增加1‰,表明MIS2早期内陆地区经历了一次显著的弱季风过程,可能响应于北大西洋Heinrich 2事件。石笋δ~(18 )O序列伴随着轨道尺度太阳辐射的变化,晚全新世δ~(18 )O值持续偏重意味着低纬热带辐合带逐步南移,导致北方地区夏季风降水持续减少。Dansgaard-Oeschger(D-O)15事件具有明显的双峰结构,与格陵兰冰心记录的亚千年尺度温度波动几乎同步变化。
The high-resolution oxygen isotope sequence established upon100 oxygen isotope samples and8 ~(230 )Th dates from the Dragon Cave,Shanxi province,north China,provides a detailed history of East Asian summer monsoon(EASM)variation since Marine Isotope Stages(MIS)3.The sample L8 grew discontinuously during the periods from58.0to54.5 kaBP,27.1to18.0kaBP,6.8 to 3.9 kaBP,respectively.On the orbital scale,the long-term trend of theδ~(18 )O record generally follow the North Hemisphere Insolation changes.However,the L8δ~(18 )O value abruptly increased by1‰at 24.5 kaBP,indicating an abrupt weak monsoon event possibly associated with the Heinrich event 2in the North Atlantic region.Moreover,gradual enrichment ofδ~(18 )O since~6 kaBP also indicates steadily weakening of EASM,responding to southward retreat of the Intertropical Convergence Zone.During the early MIS3,our record shows two millennial-scale strong summer events,analogous in timing and structure to the Greenland Dansgaard-Oeschger events 16-15.The latter event(DO15)exhibits two distinct phases,consistent with the centennial shifts in Greenland temperature changes.This relationship reveals a tight coupling between high-and low-latitude climates at sub-millennial scales,implying a role of the large-scale ocean-atmosphere circulation in linking Greenland temperature and the Asian monsoon.
The high-resolution oxygen isotope sequence established upon100 oxygen isotope samples and8 ~(230 )Th dates from the Dragon Cave,Shanxi province,north China,provides a detailed history of East Asian summer monsoon(EASM)variation since Marine Isotope Stages(MIS)3.The sample L8 grew discontinuously during the periods from58.0to54.5 kaBP,27.1to18.0kaBP,6.8 to 3.9 kaBP,respectively.On the orbital scale,the long-term trend of theδ~(18 )O record generally follow the North Hemisphere Insolation changes.However,the L8δ~(18 )O value abruptly increased by1‰at 24.5 kaBP,indicating an abrupt weak monsoon event possibly associated with the Heinrich event 2in the North Atlantic region.Moreover,gradual enrichment ofδ~(18 )O since~6 kaBP also indicates steadily weakening of EASM,responding to southward retreat of the Intertropical Convergence Zone.During the early MIS3,our record shows two millennial-scale strong summer events,analogous in timing and structure to the Greenland Dansgaard-Oeschger events 16-15.The latter event(DO15)exhibits two distinct phases,consistent with the centennial shifts in Greenland temperature changes.This relationship reveals a tight coupling between high-and low-latitude climates at sub-millennial scales,implying a role of the large-scale ocean-atmosphere circulation in linking Greenland temperature and the Asian monsoon.
引文
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[29] Dong J G,Wang Y J,Cheng H,et al.A high-resolution stalagmite record of the Holocene East Asian monsoon from Mt Shennongjia,central China[J].The Holocene,2010,20:257-264.
[30] Liu D B,Wang Y J,Cheng H,et al.Cyclic changes of Asian monsoon intensity during the early mid-Holocene from annually-laminated stalagmites,central China[J].Quaternary Science Reviews,2015,121:1-10.
[31] Liu Y H,Henderson G M,Hu C Y,et al.Links between the East Asian monsoon and North Atlantic climate during the 8,200year event[J].Nature Geoscience,2013,6:117-120.
[32] Svensson A,Andersen K K,Bigler M,et al.A 60 000year Greenland stratigraphic ice core chronology[J].Climate of the Past,2008,4:47-57.
[33] Schneider T,Bischoff,T,Haug G H.Migrations and dynamics of the intertropical convergence zone[J].Nature,2014,531:45-53.
[2] Wang Y J,Cheng H,Edwards R L,et al.A high-resolution absolute-dated late Pleistocene monsoon record from Hulu Cave,China[J].Science,2001,294:2345-2348.
[3] Liu,D B,Wang Y J,Cheng H,et al.Sub-millennial variability of Asian monsoon intensity during the early MIS 3and its analogue to the ice age terminations[J].Quaternary Science Reviews,2010,29:1107-1115.
[4] Duan W H,Cheng H,Tan M,et al.Onset and duration of transitions into Greenland Interstadials 15.2and 14in northern China constrained by an annually laminated stalagmite[J].Scientific Reports,2016,6,20844;dio:10.1038/srep20844.
[5]陈世涛,汪永进,吴江滢,等.东亚季风气候变化对Heinrich2事件的响应:来自石笋的高分辨率记录[J].地球化学,2006,35(6):586-592.[CHEN Shitao,WANG Yongjing,WU Jiangying,et al.An event of the East Asian monsoon responding to Heinrich Event 2:evidence from high-resolution stalagmite record[J].Geochimica,2006,35(6):586-592.]
[6] Zhao K,Wang Y J,Edwards R L,et al.High-resolution stalagmiteδ18 O records of Asian monsoon changes in central and southern China spanning the MIS 3/2transition[J].Earth and Planetary Science Letters,2010,298:191-198.
[7]吴秀平,吴锦奎,候典炯,等.黄土高原西部石笋记录的H2事件特征[J].地球科学-中国地质大学学报,2013,38(3):471-481.[WU Xiuping,WU Jinkui,HOU Dianjiong,et al.Characteristics and variability of Heirich-2event recorded by stalagmite oxygen isotopic composition in the western Loess Plateau[J].Journal of China University of Geosciences,2013,38(3):471-481.]
[8] Cosford J,Qing H R,Lin Y,et al.The East Asian monsoon during MIS 2expressed in a speleothemδ18 O record from Jintanwan Cave,Hunan,China[J].Quaternary Research,2010,73:541-549.
[9] Sun Y B,Clemens S C,Morrill C,et al.Influence of Atlantic meridional overturning circulation on the East Asian winter monsoon[J].Nature Geoscience,2012,5:46-49.
[10] Shen C C,Edwards R L,Cheng H,et al.Uranium and thorium isotopic and concentration measurements by magnetic sector inductively coupled plasma mass spectrometry[J].Chemical Geology,2002,185:165-178.
[11] Shen C C,Wu C C,Cheng H,et al.High-precision and highresolution carbonate 230 Th dating by MC-ICP-MS with SEM protocols[J].Geochimica et Cosmochimica Acta,2012,99:71-86.
[12] Fleitmann D,Burns S,Pekala M et al.Holocene and Pleistocene pluvial periods in Yemen,southern Arabia[J].Quaternary Science Reviews,2011,30:783-787.
[13] Wang X F,Auler A S,Edwards R L et al.Wet periods in northeastern Brazil over the past 210ka linked to distant climate anomalies[J].Nature,2004,432:740-743.
[14]董进国.湖北三宝洞石笋生长速率及其古气候意义[J].第四纪研究,2013,33:146-154.[DONG Jinguo.The growth and the paleoclimatic significance of stalagmites in Sanbao cave,Hubei[J].Quaternary Sciences,2013,33:146-154.].
[15]施雅风,于革.40~30kaBP中国暖湿气候和海侵的特赠与成因探讨[J].第四纪研究,2003,23:1-11.[SHI Yafeng,Yu Ge.Warm-humid climate and transgressions during 40~30kaBP and their potential mechanisms[J].Quaternary Sciences,2003,23:1-11.].
[16] Dong J G,Shen C C,Kong X G,et al.Reconciliation of hydroclimate sequences from the Chinese Loess Plateau and low-latitude East Asian Summer Monsoon regions over the past 14,500years[J].Palaeogeography,Palaeoclimatology,Palaeoecology,2015,435:127-135.
[17]白晓,桑文翠,李丰山,等.武都万象洞方解石现代沉积体系δ18 O值月变化特征[J].地球化学,2015,44:245-253.[BAI Xiao,SANG Wencui,LI Fengshan,et al.Monthly isotopic variations of calcite deposition system in Wanxiang Cave,Wudu County,Gandu[J].Geochimica,2015,44(3):245-253.]
[18]王芳,孙青,蔡炳贵,等.辽宁本溪庙洞降水、滴水和现生碳酸盐钙的δ18 O变化特征及其古气候意义[J].第四纪研究,2016,36:1370-1382.[WANG Fang,SUN Qing,CAI Binggui,et al.Variation ofδ18 O in the meteoric precipitation,drip water and their calcite deposition in Miaodong cave,Liaoning province and its implications for palaeoclimatic reconstructions[J].Quaternary Sciences,2016,36:1370-1382.].
[19] Tan L C,Cai Y J,Cheng H,et al.Climate significance of speleothemδ18 O from central China on decadal timescale[J].Journal of Asian Earth Sciences,2015,106:150-155.
[20] LeGrande A N and Schmidt G A.Sources of Holocene variability of oxygen isotopes in paleoclimate archives[J].Climate of the Past,2009,5:441-455.
[21] Liu J B,Chen J H,Zhang X J,et al.Holocene East Asian summer monsoon records in northern China and their inconsistency with Chinese stalagmiteδ18 O records[J].Earth Science Reviews,2015,148:194-208.
[22] Pausata F,Battisti D,Nisancioglu K,et al.Chinese stalagmiteδ18 O controlled by changes in the Indian monsoon during a simulated Heinrich event[J].Nature Geoscience,2011,4:474-480.
[23] Maher B A.Holocene variability of the East Asian summer monsoon from Chinese cave records:a re-assessment[J].The Holocene,2008,18:861-866.
[24] Cheng H,Edwards R L,Sinha A et al.The Asian monsoon over the past 640,000years and ice age terminations[J].Nature,2016,534:640-646.
[25] Liu Z Y,Wen X Y,Brady E C,et al.Chinese cave records and the East Asia Summer Monsoon[J].Quaternary Science Reviews,2014,83:115-128.
[26] Orland I J,Edwards R L,Cheng H,et al.Direct measurements of deglacial monsoon strength in a Chinese stalagmite[J].Geology,2015,43:555-558.
[27] Goldsmith Y,Broecker W S,Xu H,et al.Northward extent of East Asian monsoon covaries with intensity on orbital and millennial timescales[J].Proceedings of the National Academy of Sciences of the United States of America,2017,114:1817-1821.
[28] Rao Z G,Chen F H,Cheng H,et al.High-resolution summer precipitation variations in the western Chinese Loess Plateau during the last glacial[J].Scientific Reports,2013,3,2785;dio:10.1038/srep02785.
[29] Dong J G,Wang Y J,Cheng H,et al.A high-resolution stalagmite record of the Holocene East Asian monsoon from Mt Shennongjia,central China[J].The Holocene,2010,20:257-264.
[30] Liu D B,Wang Y J,Cheng H,et al.Cyclic changes of Asian monsoon intensity during the early mid-Holocene from annually-laminated stalagmites,central China[J].Quaternary Science Reviews,2015,121:1-10.
[31] Liu Y H,Henderson G M,Hu C Y,et al.Links between the East Asian monsoon and North Atlantic climate during the 8,200year event[J].Nature Geoscience,2013,6:117-120.
[32] Svensson A,Andersen K K,Bigler M,et al.A 60 000year Greenland stratigraphic ice core chronology[J].Climate of the Past,2008,4:47-57.
[33] Schneider T,Bischoff,T,Haug G H.Migrations and dynamics of the intertropical convergence zone[J].Nature,2014,531:45-53.