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Realistic Paleobathymetry of the Cenomanian–Turonian (94 Ma) Boundary Global Ocean

机译:西诺曼尼亚–突尼斯(94 Ma)边界全球海洋的现实古大气测量

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At present, global paleoclimate simulations are prepared with bathtub-like, flat, featureless and steep walled ocean bathymetry, which is neither realistic nor suitable. In this article, we present the first enhanced version of a reconstructed paleobathymetry for Cenomanian–Turonian (94 Ma) time in a 0.1° × 0.1° resolution, that is both realistic and suitable for use in paleo-climate studies. This reconstruction is an extrapolation of a parameterized modern ocean bathymetry that combines simple geophysical models (standard plate cooling model for the oceanic lithosphere) based on ocean crustal age, global modern oceanic sediment thicknesses, and generalized shelf-slope-rise structures calibrated from a published global relief model of the modern world (ETOPO1) at active and passive continental margins. The base version of this Cenomanian–Turonian paleobathymetry reconstruction is then updated with known submarine large igneous provinces, plateaus, and seamounts to minimize the difference between the reconstructed paleobathymetry and the real bathymetry that once existed.
机译:目前,用类似浴缸的,平坦的,无特征的和陡峭的壁海洋测深法来准备全球古气候模拟,这既不现实,也不适合。在本文中,我们以0.1°×0.1°的分辨率介绍了用于Cenomanian–Turonian(94 Ma)时间的古古柏色测量法的第一个增强版本,该方法既现实又适用于古气候研究。此重建是对参数化现代海洋测深法的推断,该方法结合了基于海洋地壳年龄,全球现代海洋沉积物厚度以及根据已发表论文进行校准的广义架子-斜坡-上升结构的简单地球物理模型(大洋岩石圈的标准板冷却模型)。处于主动和被动大陆边缘的现代世界的全球浮雕模型(ETOPO1)。然后,用已知的海底大型火成岩省,高原和海山更新此Cenomanian-Turonian古测深法的基本版本,以最大程度地减少重建的古古测度和曾经存在的实际测深法之间的差异。

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