Climate model and proxy data constraints on ocean warming across the Paleocene-Eocene Thermal Maximum
Climate model and proxy data constraints on ocean warming across the Paleocene-Eocene Thermal Maximum
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DOI：
10.1016/j.earscirev.2013.07.004
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发表时间：
2013-10-01
影响因子：
12.1
通讯作者：
Maslin, Mark
中科院分区：
文献类型：
--
作者：
Dunkley Jones, Tom;Lunt, Daniel J.;Maslin, Mark
约束温室气体强迫，气候变暖和估计的气候敏感性在古代大型瞬态变暖事件是一个重大的挑战，古气候研究界。在这里，我们提供了一个新的汇编和合成的海洋代用品温度数据在最大的这些高温，古新世始新世热最大（PETM）。这包括对所有数据应用一致的温度校准，包括最新的一套古生物脂质衍生古温度测定校准。该汇编为PETM变暖的可能范围，现有记录中存在的偏见以及PETM海洋变暖地理模式的初步评估提供了知情讨论的基础。为了帮助解释PETM变暖的代理衍生估计的地理变异性，我们将这些数据与使用Hadley中心大气-海洋环流模式（AOGCM）HadCM 3L对始新世气候进行的高pCO（2）模拟所产生的变暖模式进行了比较。水变暖，我们估计，全球平均表面温度异常的PETM是在4至5摄氏度的范围内。(C)2013爱思唯尔有限公司版权所有。
Constraining the greenhouse gas forcing, climatic warming and estimates of climate sensitivity across ancient large transient warming events is a major challenge to the palaeoclimate research community. Here we provide a new compilation and synthesis of the available marine proxy temperature data across the largest of these hyperthermals, the Paleocene-Eocene Thermal Maximum (PETM). This includes the application of consistent temperature calibrations to all data, including the most recent set of calibrations for archaeal lipid-derived palaeothermometry. This compilation provides the basis for an informed discussion of the likely range of PETM warming, the biases present in the existing record and an initial assessment of the geographical pattern of PETM ocean warming. To aid interpretation of the geographic variability of the proxy-derived estimates of PETM warming, we present a comparison of this data with the patterns of warming produced by high pCO(2) simulations of Eocene climates using the Hadley Centre atmosphere-ocean general circulation model (AOGCM) HadCM3L On the basis of this comparison and taking into account the patterns of intermediate-water warming we estimate that the global mean surface temperature anomaly for the PETM is within the range of 4 to 5 degrees C. (C) 2013 Elsevier B.V. All rights reserved.