org.earthsystemgrid.www::da1b87aa-0ae5-4ef0-a091-ed9df1932cd4 eng; USA utf8 7c306193-f977-11e8-9f67-00c0f03d5b7c dataset esg-support@earthsystemgrid.org UCAR/NCAR - Climate and Global Dynamics Laboratory esg-support@earthsystemgrid.org pointOfContact 2023-11-12T10:05:02 ISO 19115 Geographic information - Metadata ISO 19115:2003(E) https://doi.org/10.5065/mgb4-cd43 CESM2 and CESM1 data supporting Long et al. (2021): Simulations with the Marine Biogeochemistry Library 2022-04-20 publication 2022-03-29 modified https://doi.org/10.5065/mgb4-cd43 M. C. Long UCAR/NCAR - Climate and Global Dynamics Laboratory author J. K. Moore University of California Irvine - Department of Earth System Science author K. Lindsay UCAR/NCAR - Climate and Global Dynamics Laboratory author M. Levy UCAR/NCAR - Climate and Global Dynamics Laboratory author S. C. Doney University of Virginia - Department of Environmental Sciences author J. Y. Luo UCAR/NCAR - Climate and Global Dynamics Laboratory (Now at National Oceanic and Atmospheric Administration - Geophysical Fluid Dynamics Laboratory) author K. M. Krumhardt UCAR/NCAR - Climate and Global Dynamics Laboratory author R T. Letscher University of New Hampshire - College of Engineering and Physical Sciences author M. Grover UCAR/NCAR - Climate and Global Dynamics Laboratory author Z. T. Sylvester University of Colorado Boulder - Environmental Studies Program author UCAR/NCAR - Climate and Global Dynamics Laboratory publisher The Marine Biogeochemistry Library (MARBL) is a prognostic ocean biogeochemistry model that simulates marine ecosystem dynamics and the coupled cycles of carbon, nitrogen, phosphorus, iron, silicon, and oxygen. MARBL is a component of the Community Earth System Model (CESM); it supports flexible ecosystem configuration of multiple phytoplankton and zooplankton functional types; it is also portable, designed to interface with multiple ocean circulation models. Here, we present scientific documentation of MARBL, describe its configuration in CESM2 experiments included in the Coupled Model Intercomparison Project version 6 (CMIP6), and evaluate its performance against a number of observational datasets. The model simulates present-day air-sea CO2 flux and many aspects of the carbon cycle in good agreement with observations. However, the simulated integrated uptake of anthropogenic CO2 is weak, which we link to poor thermocline ventilation, a feature evident in simulated chlorofluorocarbon distributions. This also contributes to larger-than-observed oxygen minimum zones. Moreover, radiocarbon distributions show that the simulated circulation in the deep North Pacific is extremely sluggish, yielding extensive oxygen depletion and nutrient trapping at depth. Surface macronutrient biases are generally positive at low latitudes and negative at high latitudes. CESM2 simulates globally-integrated net primary production (NPP) of 48 Pg C/yr and particulate export flux at 100m of 7.1 Pg C/yr. The impacts of climate change include an increase in globally-integrated NPP, but substantial declines in the North Atlantic. Particulate export is projected to decline globally, attributable to decreasing export efficiency associated with changes in phytoplankton community composition. DiscussCESMForums (http://bb.cgd.ucar.edu) UCAR/NCAR - Climate and Global Dynamics Laboratory esg-support@earthsystemgrid.org pointOfContact NETCDF Dataset DataCite Resource Type 2014-10-16 revision 3.1 DataCite Metadata Working Group originator resourceTypeGeneral Creative Commons Attribution 4.0 International License. eng; USA UCAR/NCAR - CISL - CDP resourceProvider https://www.earthsystemgrid.org/dataset/id/da1b87aa-0ae5-4ef0-a091-ed9df1932cd4.html https browser CESM2 and CESM1 data supporting Long et al. (2021): Simulations with the Marine Biogeochemistry Library Metadata Link download