Coordinated hydrological regimes in the Indo-Pacific region during the past two millennia
Coordinated hydrological regimes in the Indo-Pacific region during the past two millennia
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DOI：
10.1029/2009pa001871
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发表时间：
2010-03-05
期刊：
影响因子：
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通讯作者：
Linsley, Braddock K.
中科院分区：
文献类型：
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作者：
Tierney, Jessica E.;Oppo, Delia W.;Linsley, Braddock K.
仪器数据表明，在过去的世纪内，热带太平洋大气动力学和水文学发生了重大变化，这可能是对人为变暖的反应。为了更好地了解这些趋势，我们使用的陆地高等植物叶蜡（三角洲D（蜡））在海洋沉积物中的氢同位素比值从西南苏拉威西岛，印度尼西亚，编译一个详细的重建中央印度-太平洋暖池（IPWP）水文变化跨越过去两千年的大部分。我们的古资料与东南亚季风重建高度相关，表明东亚夏季风（EASM）活动的时间间隔与较弱的印度尼西亚季风（IM）有关。此外，我们的数据中的百年尺度振荡遵循北方半球气候的已知变化（e。例如，在一个实施例中，小冰期和中世纪温暖期），这意味着北方半球温度和IPWP水文之间的动态联系。东亚夏季风和IM之间的反比关系表明，迁移的热带辐合带和季风强度的相关变化造成的天气水文变化在IPWP在过去的两千年的大部分。
Instrumental data suggest that major shifts in tropical Pacific atmospheric dynamics and hydrology have occurred within the past century, potentially in response to anthropogenic warming. To better understand these trends, we use the hydrogen isotopic ratios of terrestrial higher plant leaf waxes ( delta D(wax)) in marine sediments from southwest Sulawesi, Indonesia, to compile a detailed reconstruction of central Indo-Pacific Warm Pool (IPWP) hydrologic variability spanning most of the last two millennia. Our paleodata are highly correlated with a monsoon reconstruction from Southeast Asia, indicating that intervals of strong East Asian summer monsoon (EASM) activity are associated with a weaker Indonesian monsoon (IM). Furthermore, the centennial-scale oscillations in our data follow known changes in Northern Hemisphere climate ( e. g., the Little Ice Age and Medieval Warm Period) implying a dynamic link between Northern Hemisphere temperatures and IPWP hydrology. The inverse relationship between the EASM and IM suggests that migrations of the Intertropical Convergence Zone and associated changes in monsoon strength caused synoptic hydrologic shifts in the IPWP throughout most of the past two millennia.