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Volume 10, issue 4
Earth Syst. Sci. Data, 10, 1925-1941, 2018
https://doi.org/10.5194/essd-10-1925-2018
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.

Special issue: The SPARC Reanalysis Intercomparison Project (S-RIP) (ACP/ESSD...

Earth Syst. Sci. Data, 10, 1925-1941, 2018
https://doi.org/10.5194/essd-10-1925-2018
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.

  18 Oct 2018

18 Oct 2018

Zonal-mean data set of global atmospheric reanalyses on pressure levels

Patrick Martineau1, Jonathon S. Wright2, Nuanliang Zhu2,3, and Masatomo Fujiwara4 Patrick Martineau et al.
  • 1Research Center for Advanced Science and Technology, the University of Tokyo, Tokyo, Japan
  • 2Ministry of Education Key Laboratory of Earth System Modeling, Department of Earth System Science, Tsinghua University, Beijing 100084, China
  • 3Department of Engineering Physics, Tsinghua University, Beijing 100084, China
  • 4Faculty of Environmental Earth Science, Hokkaido University, Sapporo, 060-0810, Japan

Abstract. This data set, which is prepared for the Stratosphere–troposphere Processes And their Role in Climate (SPARC) Reanalysis Intercomparison Project (S-RIP), provides several zonal-mean diagnostics computed from reanalysis data on pressure levels. Diagnostics are currently provided for a variety of reanalyses, including ERA-40, ERA-Interim, ERA-20C, NCEP–NCAR, NCEP–DOE, CFSR, 20CR v2 and v2c, JRA-25, JRA-55, JRA-55C, JRA-55AMIP, MERRA, and MERRA-2. The data set will be expanded to include additional reanalyses as they become available. Basic dynamical variables (such as temperature, geopotential height, and three-dimensional winds) are provided in addition to a complete set of terms from the Eulerian-mean and transformed-Eulerian-mean momentum equations. Total diabatic heating and its long-wave and shortwave components are included as availability permits, along with heating rates diagnosed from the basic dynamical variables using the zonal-mean thermodynamic equation. Two versions of the data set are provided, one that uses horizontal and vertical grids provided by the various reanalysis centers and another that uses a common grid (CG) to facilitate comparison among data sets. For the common grid, all diagnostics are interpolated horizontally onto a regular 2.5° × 2.5° grid for a subset of pressure levels that are common among all included reanalyses. The dynamical (Martineau, 2017, 10.5285/b241a7f536a244749662360bd7839312) and diabatic (Wright, 2017, 10.5285/70146c789eda4296a3c3ab6706931d56) variables are archived and maintained by the Centre for Environmental Data Analysis (CEDA).

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This data set provides 6-hourly zonal-mean diagnostics derived from global atmospheric reanalyses on pressure levels. Data include basic variables, such as temperature and three-dimensional winds, advanced diagnostics based on the momentum and thermodynamic equations, and model-generated diabatic heating rates. Diagnostics are provided both on latitude–vertical grids corresponding to data as originally obtained from the reanalysis centers and on a standardized grid to facilitate intercomparison.
This data set provides 6-hourly zonal-mean diagnostics derived from global atmospheric...
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