edu.ucar.gdex::d1b95333-fb36-40f6-8808-afba56c4cdba eng; USA utf8 dataset GDEX Curator UCAR/NCAR - GDEX datahelp@ucar.edu pointOfContact 2022-07-21T11:47:03-06:00 ISO 19115 Geographic information - Metadata ISO 19115:2003(E) https://doi.org/10.5065/wmjm-0r88 Dataset to reproduce the figures in "Parameterizing the Impact of Unresolved Temperature Variability on the Large-Scale Density Field: Part 2. Modeling." in Journal of Advances in Modeling Earth Systems (JAMES) 2021-12-20 publication 2021-12-16 modified https://doi.org/10.5065/wmjm-0r88 UCAR/NCAR - GDEX datahelp@ucar.edu publisher Kenigson, Jessica UCAR/NCAR - Climate and Global Dynamics Laboratory author Ocean circulation models have systematic errors in large-scale horizontal density gradients due to estimating the grid-cell-mean density by applying the nonlinear seawater equation of state to the grid-cell-mean water properties. In frontal regions where unresolved subgrid-scale (SGS) fluctuations are significant, dynamically relevant errors in the representation of current systems can result. A previous study developed a novel and computationally efficient parameterization of the unresolved SGS temperature variance andresulting density correction. This parameterization was empirically validated but not tested in an ocean model. In this study, we implement deterministic and stochastic variants of this parameterization in the pressure-gradient force term of a coupled ocean-sea ice configuration of CESM-MOM6 and perform a suite of hindcast sensitivity experiments to investigate the ocean response. The parameterization leads to coherent changes in the large-scale ocean circulation and hydrography, particularly in the Nordic Seas and Labrador Sea, which are attributable in large part to changes in the seasonally varying upper-ocean exchange through Denmark Strait. In addition, the separated Gulf Stream strengthens and shifts equatorward, reducing a common bias in coarse-resolution ocean models. The ocean response to the deterministic and stochastic variants of the parameterization is qualitatively, albeit not quantitatively, similar, yet qualitative differences are found in various regions. Frederic Castruccio UCAR/NCAR - Climate and Global Dynamics Laboratory fredc@ucar.edu pointOfContact application/x-netcdf Dataset DataCite Resource Type 2014-10-16 revision 3.1 DataCite Metadata Working Group originator resourceTypeGeneral EARTH SCIENCE > OCEANS > OCEAN CIRCULATION > OCEAN MIXED LAYER EARTH SCIENCE > OCEANS > OCEAN TEMPERATURE > POTENTIAL TEMPERATURE EARTH SCIENCE > OCEANS > SALINITY/DENSITY > POTENTIAL DENSITY EARTH SCIENCE > OCEANS > SALINITY/DENSITY > SALINITY EARTH SCIENCE > OCEANS > SEA ICE > ICE DEPTH/THICKNESS EARTH SCIENCE > OCEANS > SEA SURFACE TOPOGRAPHY theme NASA/GCMD Earth Science Keywords Science and Services Keywords 2018-03-15 revision 8.6 Global Change Master Directory (GCMD). 2018. GCMD Keywords, Version 8.6. Greenbelt, MD: Global Change Data Center, Science and Exploration Directorate, Goddard Space Flight Center (GSFC) National Aeronautics and Space Administration (NASA). URL (GCMD Keyword Forum Page): https://earthdata.nasa.gov/gcmd-forum OTHER > MODELS > CESM > NCAR COMMUNITY EARTH SYSTEM MODEL theme NASA/GCMD Earth Science Keywords Platforms and Sources Keywords 2018-03-15 revision 8.6 Global Change Master Directory (GCMD). 2018. GCMD Keywords, Version 8.6. Greenbelt, MD: Global Change Data Center, Science and Exploration Directorate, Goddard Space Flight Center (GSFC) National Aeronautics and Space Administration (NASA). URL (GCMD Keyword Forum Page): https://earthdata.nasa.gov/gcmd-forum Creative Commons Attribution 4.0 International License. None 0.67 eng; USA -180.0 180.0 -90.0 90.0 application/x-netcdf UCAR/NCAR - CISL - CDP resourceProvider https://gdex.ucar.edu/dataset/id/d1b95333-fb36-40f6-8808-afba56c4cdba.html https browser Dataset to reproduce the figures in "Parameterizing the Impact of Unresolved Temperature Variability on the Large-Scale Density Field: Part 2. Modeling." in Journal of Advances in Modeling Earth Systems (JAMES) Metadata Link download