globalchange  > 过去全球变化的重建
DOI: 10.1016/j.quascirev.2016.07.002
Scopus记录号: 2-s2.0-84989940222
论文题名:
A 2000-year leaf wax-based hydrogen isotope record from Southeast Asia suggests low frequency ENSO-like teleconnections on a centennial timescale
作者: Yamoah K.A.; Chabangborn A.; Chawchai S.; Schenk F.; Wohlfarth B.; Smittenberg R.H.
刊名: Quaternary Science Reviews
ISSN: 2773791
出版年: 2016
卷: 148
起始页码: 44
结束页码: 53
语种: 英语
英文关键词: El Niño-Southern Oscillation ; Hydroclimate ; Mainland Southeast Asia ; Pacific Walker Circulation ; Plant wax δ13C ; Plant wax δD
Scopus关键词: Atmospheric pressure ; Atmospheric thermodynamics ; Digital storage ; Dynamics ; Isotopes ; Nickel ; Rain ; Tropics ; Climate condition ; Hydroclimate ; Mainland Southeast Asia ; Rainfall patterns ; Sedimentary sequence ; Southern oscillation ; Spatiotemporal variability ; Walker circulation ; Climatology ; Pomatiopsis californica
英文摘要: Limited understanding of the complex dynamics of the tropical monsoon exists, partly due to inadequate paleo (hydro)-climate proxy data from monsoonal regions. This study presents a 2000-year long record of hydrogen isotope values of leaf wax (δDwax) from a sedimentary sequence recovered from Lake Pa Kho, Northern Thailand. Evaluation of present day rainfall patterns and water isotope data indicates that δDwax reflects the amount of rainfall and is also influenced by El Niño-Southern Oscillation (ENSO) dynamics. Over the last 2000 years, wettest conditions occurred between ca. 700 AD and ca. 1000 AD, whereas the driest intervals lasted from ca. 50 BCE to ca. 700 AD and from ca. 1300 AD to ca. 1500 AD. Further investigations to establish the spatiotemporal variability of ENSO within the wider tropical Asian-Pacific realm over centennial timescales revealed a low-frequency-tripole pattern between mainland SE Asia (MSEA), the tropical West Pacific, and the central-eastern Pacific, with a wetter than normal MSEA during El Niño-like climate conditions. This pattern stands in contrast to the annual event where El Niño cause drier conditions in MSEA. We hypothesize that on centennial timescales the land-sea contrast, which drives monsoon intensity in MSEA, is modulated by the latitudinal shift of the Walker circulation and associated ENSO dynamics. © 2016 Elsevier Ltd
资助项目: This work was supported by Swedish Research Council research grants 621-2008-2855, 621-2011-4684 and 348-2008-6071 to BW, and 621-2011-4916 to RS. The Delta facility, funded by the Faculty of Science, Stockholm University, provided support for the isotope analyses. We wish to thank Sherilyn Fritz, Ludvig Löwemark, Suda Inthongkaew, Wichuratree Klubseang, Jayne Rattray, Anna Hägglund and Francesco Muschitiello and all those who helped in diverse ways to make this project a success.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/59492
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作者单位: Department of Geological Sciences and Bolin Centre for Climate Research, Stockholm University, Stockholm, Sweden; Department of Geology, The Faculty of Science, Chulalongkorn University, Bangkok, Thailand

Recommended Citation:
Yamoah K.A.,Chabangborn A.,Chawchai S.,et al. A 2000-year leaf wax-based hydrogen isotope record from Southeast Asia suggests low frequency ENSO-like teleconnections on a centennial timescale[J]. Quaternary Science Reviews,2016-01-01,148
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