A model for marine sedimentary carbonate diagenesis and paleoclimate proxy signal tracking: IMP v1.0
نویسندگان
چکیده
Abstract. The preservation of calcium carbonate in marine sediments is central to controlling the alkalinity balance ocean and, hence, ocean–atmosphere partitioning CO2. To successfully address carbon cycle–climate dynamics on geologic (?1 kyr) timescales, Earth system models then require an appropriate representation primary controls CaCO3 preservation. At same time, sedimentary carbonates represent a major archive history, as they have potential preserve how seawater chemistry, isotopic composition, and even properties planktic benthic ecosystems, change with time. However, changes chemical erosion previously deposited CaCO3, along biogenic reworking upper portions sediments, whereby sediment particles are translocated both locally nonlocally between different depths all act distort recorded signal. Numerical can aid recovering what “true” environmental might been, but only if appropriately account for these processes. Building classical 1-D reaction-transport framework, we present new diagenetic model – IMP (Implicit Multiple Particles (and diagenesis)) that simulates biogeochemical transformations carbonate-hosted proxy signals by allowing populations solid possess physicochemical characteristics such value, solubility particle size. also utilizes variable transition matrix implement styles bioturbation. We illustrate utility deciphering past using several hypothesized transitions proxies obscured mixing erosion. facilitate use IMP, provide Fortran, MATLAB Python versions. described integration into mind, description this coupling “cGENIE.muffin” subsequent paper.
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ژورنال
عنوان ژورنال: Geoscientific Model Development
سال: 2021
ISSN: ['1991-9603', '1991-959X']
DOI: https://doi.org/10.5194/gmd-14-5999-2021