THE CHARACTERISTICS OF CLIMATIC TRANSITION FROM ALLERØD TO EARLY YOUNGER DRYAS
-
摘要: 湖北神农架青天洞QT17石笋的3个U-Th年龄和持续1 440 a的纹层计数序列提供了13.5~12.1 kaBP期间平均4 a分辨率的δ18O东亚季风强度记录。该记录与Cariaco盆地纹泥灰度记录显示阿勒罗德至新仙女木早期气候呈现低幅振荡特征,而格棱兰GISP2和GRIP冰心温度记录在同时段则呈现大幅高频振荡。4个记录的气候转型时间在测年误差范围内基本一致,一定程度上说明北半球高低纬千年尺度气候事件同步变化。然而,该期间东亚季风气候转型持续时间近550 a (纹层计数年),而大西洋气候记录仅有230~400 a,可能由于季风气候降水同位素部分受来自海洋水源同位素的影响。Abstract: Three U-Th dates, 336 pairs of δ18O data and 1440 laminar-thicknesses have been measured for QT17 stalagmite from Qingtian Cave in Shennongjia area, Hubei Province. An averaged 4-year-resolution absolute-dated oxygen isotope record from Qingtian Cave represents East Asian monsoon history during the period from 13.5 to 12.1 kaBP. This record bears a high similarity to a grey level record of varved sediments from Cariaco basin in terms of their fluctuation and amplitude at the transition during the period from Allerød to early Younger Dryas. On the contrary, both new Greenland ice cores (GISP2 and GRIP) δ18O records show large amplitude during that period. Within the dating error, the four records are approximately synchronous at millennical time scale, which supports the coupled link between northern high and low latitudes in climate systems. Despite of the four records in phase, these records display different durations for this transition. We can see from the records in Atlantic climate region(including the two Greenland ice cores)and Caricao basin that the transition lasts 230~400 years only. From the annual layer counting result, our monsoon record shows much longer duration, about 550 years. We interpret the long duration as a mixed isotope effect of the monsoon precipitation and its sourced sea water.
-
Keywords:
- stalagmite /
- YD event /
- climatic transition /
- Qingtian Cave
-
-
[1] Alley R B, Meese D A, Shuman C A, et al. Abrupt increase in Greenland snow accumulation at the end of the Younger Dryas event[J]. Nature, 1993, 362:527-529.
[2] GRIP Project Members. Climate instability during the last interglacial period recorded in the GRIP ice core[J]. Nature, 1993, 364:203-207.
[3] Litt T, Brauer A, Goslar T, et al. Correlation and synchronization of late glacial continental sequences in northern central Europe based on annually laminated lacustrine sediments[J]. Quaternary Science Reviews, 2001, 20:1233-1249
[4] 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
[5] An Z S, Porter S C, Zhou W J, et al. Episode of strengthened summer monsoon climate of Younger Dryas age on the Loess Plateau of Central China[J]. Quaternary Research, 1993, 39:45-54.
[6] Tarasov L, Peltier W R. Arctic freshwater forcing of the Younger Dryas cold reversal[J]. Nature, 2005, 435:662-665.
[7] Broecker W S. Does the trigger for abrupt climate change reside in the ocean or in the atmosphere?[J].Science, 2003, 300:1519-1522.
[8] Cane M A. A role for the tropical Pacific[J]. Nature, 1998, 282:59-61.
[9] Nakagawa T, Hiroyuki K, Yoshinori Y, et al. Yangtze River Civilization Program Members. Asynchronous climate changes in the North Atlantic and Japan during the Last Termination[J]. Science, 2003, 299:688-691.
[10] Hughen K A, Southon J R, Lehman S J, et al. Synchronous radiocarbon and climate shifts during the last deglaciation[J]. Science, 2000, 290:1951-1954.
[11] Hughen K A, Eglinton T, Li X, et al. Abrupt tropical vegetation response to rapid climate changes[J]. Science, 2004, 304:1955-1959.
[12] Benson L V, Burdett J W, Kashgarian M, et al. Climatic and hydrologic oscillations in the Owens Lake Basin and adjacent Sierra Nevada, California[J]. Science, 1996, 274:746-749.
[13] Kienast M, Steinke S, Stattegger K, et al. Synchronous tropical South China Sea SST change and Greenland warming during deglaciation[J]. Science, 2001, 291:2132-2134.
[14] 汪永进, 吴江滢, 刘殿兵, 等. 石笋记录的东亚季风气候H1事件突变性特征[J]. 中国科学D辑, 2002, 32(3):228-233. [WANG Yong-jin, WU Jiang-ying, LIU Dian-bing, et al. A quick cooling event of the East Asian Monsoon responding to Heinrich Event 1:Evidence from stalagmite δ18O record[J]. Science in China (Series D), 2002, 45(1):88-96.]
[15] Grootes P M, Stuiver M, White W C, et al. Comparison of oxygen isotope records from the GISP2 and GRIP Greenland ice cores[J]. Nature, 1993, 366:552-554.
[16] Johnsen S J, Dahl-Jensen D, Gundestrup N, et al. Oxygen isotope and palaeotemperature records from six Greenland ice-core stations:Camp Century, Dye-3, GRIP, GISP2, Renland and NorthGRIP[J]. Journal of Quaternary Science, 2001, 16(4):299-307.
[17] 邱庆伦, 吴江滢, 李明霞, 等. 中全新世持续近600年的湖北神农架石笋年纹层[J]. 第四纪研究, 2006, 26(5):835-842. [QIU Qing-lun, WU Jiang-ying, LI Ming-xia, et al. The annual layer of a persistent about 600-year middle-Holocene stalagmite from Shennongjia area, Hubei Province[J]. Quaternary Sciences, 2006, 26(5):835-842.]
[18] 吴江滢, 邵晓华, 孔兴功, 等. 盛冰期太阳活动在南京石笋年层序列中的印迹[J]. 科学通报, 2006, 51(4):431-435. [WU Jiang-ying, SHAO Xiao-hua, KONG Xing-gong,et al. Imprint of solar activity on Nanjing stalagmite annual layer thickness sequence during the Last Glacial Maximum[J]. Chinese Science Bulletin,2006, 51(4):441-447.]
[19] 孔兴功, 汪永进, 吴江滢. 末次盛冰期连续3ka南京降水记录中ENSO周期[J]. 科学通报, 2003, 48(3):277-281. [KONG Xing-gong, WANG Yong-jin, WU Jiang-ying,et al. A continuous 3000-year precipitation record of ENSO variability during LGM from a stalagmite in Nanjing[J]. Chinese Science Bulletin,2003, 48(5):480-484.]
[20] Shen C C, Edwards L R, Cheng H. Uranium and thorium isotopic and concentration measurements by magnetic sector inductively coupled plasma mass spectrometry[J]. Chemical Geology, 2002, 185:165-178.
[21] Jiang X Y, Wang Y J, Kong X G, et al. Abrupt climate change of East Asian Monsoon at 130 kaBP inferred from a high resolution stalagmite δ18O record[J]. Chinese Science Bulletin, 2005, 50(23):2765-2769.
[22] 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 Xiao-hua, WANG Yong-jin, CHENG Hai, et al. Long-term trend and abrupt events of the Holocene Asian monsoon inferred from a stalagmite δ18O record from Shennongjia in Central China[J]. Chinese Science Bulletin, 2006, 51(2):221-228.]
[23] 夏志锋, 孔兴功,汪永进, 等. 东亚季风95~56 kaBP期间D/O事件年代的精确测定:以中国神农架山宝洞石笋为例[J]. 中国科学D辑, 2006, 36(9):830-837. [XIA Zhi-feng, KONG Xing-gong, WANG Yong-jin, et al. Precise dating of stalagmite-based monsoonal DO events from Shanbao Cave at Shennongjia, China[J]. Science in China (Series D), 2006, 36(9):830-837.]
[24] Wang Y J, Cheng H, Edwards R L, et al. The Holocene Asian Monsoon:links to solar changes and North Atlantic climate[J]. Science, 2005, 308:854-857.
[25] Yuan D X, Cheng H, Edwards R L, et al. Timing, duration, and transitions of the last interglacial Asian monsoon[J]. Science,2004, 304:575-578.
[26] Dansgaard W. Stable isotopes in precipitation[J]. Tellus, 1964, 16(4):436-468.
[27] Meehl G A. Coupled Land-Ocean-Atmosphere processes and south Asian Monsoon variability[J]. Science, 1994, 266:263-266.
[28] Porter S C, An Z S. Correlation between climate events in the North Atlantic and China during the last glaciation[J]. Nature, 1995, 375:305-308.
[29] Southon J. A first step to reconciling the GRIP and GISP2 ice-core chronologies, 0~14500 yr BP[J]. Quaternary Research, 2002, 57:32-37.
计量
- 文章访问数: 1791
- HTML全文浏览量: 163
- PDF下载量: 7
下载:
