کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4580963 1333668 2015 13 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Modeling the Middle Jurassic ocean circulation
ترجمه فارسی عنوان
مدل سازی گردش اقیانوس ژوراسیک میانی
کلمات کلیدی
ژوراسیک، مدل سازی، گردش خون در اقیانوس، پائئوسکلیمات
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم کشاورزی و بیولوژیک دانش خاک شناسی
چکیده انگلیسی

We present coupled ocean–sea-ice simulations of the Middle Jurassic (∼165 Ma) when Laurasia and Gondwana began drifting apart and gave rise to the formation of the Atlantic Ocean. Since the opening of the Proto-Caribbean is not well constrained by geological records, configurations with and without an open connection between the Proto-Caribbean and Panthalassa are examined. We use a sea-floor bathymetry obtained by a recently developed three-dimensional (3D) elevation model which compiles geological, palaeogeographical and geophysical data. Our original approach consists in coupling this elevation model, which is based on detailed reconstructions of oceanic realms, with a dynamical ocean circulation model. We find that the Middle Jurassic bathymetry of the Central Atlantic and Proto-Caribbean seaway only allows for a weak current of the order of 2 Sv in the upper 1000 m even if the system is open to the west. The effect of closing the western boundary of the Proto-Caribbean is to increase the transport related to barotropic gyres in the southern hemisphere and to change water properties, such as salinity, in the Neo-Tethys. Weak upwelling rates are found in the nascent Atlantic Ocean in the presence of this superficial current and we discuss their compatibility with deep-sea sedimentological records in this region.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Palaeogeography - Volume 4, Issue 4, October 2015, Pages 371–383
نویسندگان
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