globalchange  > 过去全球变化的重建
DOI: 10.1016/j.quascirev.2017.02.012
Scopus记录号: 2-s2.0-85013863462
论文题名:
Stable isotope compositions of speleothems from the last interglacial – Spatial patterns of climate fluctuations in Europe
作者: Demény A.; Kern Z.; Czuppon G.; Németh A.; Leél-Őssy S.; Siklósy Z.; Lin K.; Hu H.-M.; Shen C.-C.; Vennemann T.W.; Haszpra L.
刊名: Quaternary Science Reviews
ISSN: 2773791
出版年: 2017
卷: 161
起始页码: 68
结束页码: 80
语种: 英语
英文关键词: Europe ; Fluid inclusions ; Last interglacial ; Speleothems ; Stable isotope compositions
Scopus关键词: Carbon ; Carbonation ; Climate change ; Geochronology ; Glacial geology ; Mineralogy ; Europe ; Fluid inclusion ; Last interglacial ; Speleothems ; Stable isotopes ; Isotopes ; aridity ; climate change ; fluid inclusion ; fractionation ; hydrogen isotope ; ice core ; Last Interglacial ; paleotemperature ; regional climate ; speleothem ; stable isotope ; stalagmite ; Arctic ; Central Europe ; Greenland
英文摘要: Studies on the last interglacial (LIG) can provide information on how our environment behaved in a period of slightly higher global temperatures at about 125 ± 4 ka, even if it is not the best analogue for the Holocene. The available LIG climate proxy records are usually better preserved and can be studied at a higher resolution than those of the preceding interglacials, allowing detailed comparisons. This paper presents complex stable hydrogen, carbon and oxygen isotope records obtained for carbonate (δ13C and δ18Ocarb) and fluid inclusion hosted water (δD and δ18Ow) of a stalagmite from the Baradla Cave system in Central Europe that covers most of the LIG, as proven by U-Th dates. Comparing its C and O isotope data with records reported for other speleothem (cave-hosted carbonate) deposits from Europe revealed the complex behavior of these climate proxies, with a concerted relative increase in 18O of carbonates from 128 to 120 ka and synchronized shifts in the opposite direction after 119 ka. The hydrogen isotope analyses of inclusion-hosted water extracted from the BAR-II stalagmite also correspond to the regional climate proxy records, with meaningful deviations from global temperature trends. Beside following the general paleotemperature pattern from the climate optimum (high δD values up to −64‰ around 120 ka) to the subsequent cooling starting at about 119 ka (low δD values down to −90‰ at about 109 ka), a period between 126.5 and 123 ka with low δD values (down to −81‰) is detected in the BAR-II stalagmite. Although the isotope shifts are muted in the C-O isotope data of carbonate due to competitive fractionation processes, the δ13C data show a positive relationship with the δD pattern, indicating humidity – and possibly temperature – variations. The periods with low δD values fit well to temperature and humidity changes inferred from proxy records from western Europe to the eastern Mediterranean. Spatial distributions of these variables show, that at about 125 ± 2 ka the Mediterranean region was characterized by warm, humid conditions and enhanced seasonality with elevated winter precipitation. The combined interpretation of stable isotope data revealed that the Alpine and Mediterranean regions behaved differently during Greenland Stadial 26 (GS26, ∼119 to 116.2 ka). While the Alpine records fluctuated in close agreement with the Central Greenland ice core δ18O data, the BAR-II stalagmite show a positive δ18Ocarb anomaly. The Baradla data indicate enhanced aridity and seasonality for a part of GS26, with the relative dominance of summer precipitation and Mediterranean moisture contribution. Following the GS26 event, the effect of long-term global cooling becomes dominant in the Baradla isotope records and leads to glacial inception at about 109 ka. © 2017 Elsevier Ltd
资助项目: We would like to express our gratitude to three anonymous reviewers whose suggestions helped clarify our ideas. This research was supported by the National Office for Research and Technology of Hungary (GVOP-3.2.1-2004-04-0235/3.0), the Hungarian Scientific Research Fund (OTKA CK 80661 and OTKA NK 101664) and the “Momentum-Lendület” program of the Hungarian Academy of Sciences (LP2012-27/2012). The Bolyai János research scholarship received by György Czuppon greatly helped his work. U-Th dating was supported by Taiwan ROC MOST and NTU grants (103-2119-M-002-022, 104-2119-M-002-003 and 101R7625). This is contribution No. 41 of the 2ka Palaeoclimatology Research Group.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/59285
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作者单位: Institute for Geological and Geochemical Research, Research Centre for Astronomy and Earth Sciences, Hungarian Academy of Sciences, Budaörsi út 45, Budapest, Hungary; Department of Physical and Applied Geology, Eötvös University, Pázmány Péter sétány 1/C, Budapest, Hungary; High-Precision Mass Spectrometry and Environment Change Laboratory (HISPEC), Department of Geosciences, National Taiwan University, Taipei, Taiwan; University of Lausanne, Institute of Earth Surface Dynamics, Lausanne, Switzerland; Hungarian Meteorological Service, Kitaibel Pál u. 1, Budapest, Hungary; Geodetic and Geophysical Institute, Research Centre for Astronomy and Earth Sciences, Hungarian Academy of Sciences, Csatkai E. u. 6-8, Sopron, Hungary

Recommended Citation:
Demény A.,Kern Z.,Czuppon G.,et al. Stable isotope compositions of speleothems from the last interglacial – Spatial patterns of climate fluctuations in Europe[J]. Quaternary Science Reviews,2017-01-01,161
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