A suite of early Eocene (∼ 55 Ma) climate model boundary conditions
A suite of early Eocene (∼ 55 Ma) climate model boundary conditions
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DOI：
10.5194/gmd-7-2077-2014
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发表时间：
2014-01-01
影响因子：
5.1
通讯作者：
Huber, M.
中科院分区：
文献类型：
--
作者：
Herold, N.;Buzan, J.;Huber, M.
我们描述了一组在自洽参考框架中构建的早期始新世（类似于 55 Ma）气候模型边界条件，并结合了最新的数据和方法。鉴于始新世气候建模界对统一实验设计的需求不断增长，以及模拟始新世气候的突出特征所面临的挑战，我们公开了始新世地形、测深、潮汐消散、植被、气溶胶分布和河流径流的数据集。与之前的工作相比，我们在边界条件方面的重大改进包括实施南极洲 ANTscape 古地形、更准确地表示德雷克海峡和塔斯曼门户，以及亚网格单元地形变异性的近似。我们的边界条件还包括首次对始新世气溶胶分布和潮汐消散进行建模估计，两者都与我们的古地形和古水深测量一致。我们的数据集的分辨率是前所未有的，将有助于高分辨率气候模拟。鉴于重建过去一段时间的全球边界条件所涉及的固有不确定性，这些数据集应被视为对可用数据的一种解释，并鼓励用户根据自己的需要和解释对其进行修改。本文标志着重建一套准确、开放的始新世边界条件以用于气候模型的过程的开始。
We describe a set of early Eocene (similar to 55 Ma) climate model boundary conditions constructed in a selfconsistent reference frame and incorporating recent data and methodologies. Given the growing need for uniform experimental design within the Eocene climate modelling community and the challenges faced in simulating the prominent features of Eocene climate, we make publicly available our data sets of Eocene topography, bathymetry, tidal dissipation, vegetation, aerosol distributions and river runoff. Major improvements in our boundary conditions over previous efforts include the implementation of the ANTscape palaeotopography of Antarctica, more accurate representations of the Drake Passage and Tasman Gateway, as well as an approximation of sub grid cell topographic variability. Our boundary conditions also include for the first time modelled estimates of Eocene aerosol distributions and tidal dissipation, both consistent with our palaeotopography and palaeobathymetry. The resolution of our data sets is unprecedented and will facilitate high resolution climate simulations. In light of the inherent uncertainties involved in reconstructing global boundary conditions for past time periods these data sets should be considered as one interpretation of the available data and users are encouraged to modify them according to their needs and interpretations. This paper marks the beginning of a process for reconstructing a set of accurate, open-access Eocene boundary conditions for use in climate models.