, ,

JCSDA Announces Seventh Public Release of Skylab

, ,

The JCSDA is pleased to announce the release of Skylab 7.0!

JCSDA SkyLab 7.0 is the seventh roll-up release that provides integrated Earth System Data Assimilation capability. All JEDI code is open source and publicly available at https://github.com/JCSDA. Capabilities are demonstrated via the SkyLab testbed experiments conducted internally at JCSDA for the following components: atmosphere, land/snow, ocean, sea-ice, aerosols, and atmospheric composition. SkyLab testbed output plots are openly available through the SkyLab Data Viewer at https://skylab.jcsda.org.    

The main upgrades for this release include:

  • skylab-weather-land-7_0 experiment:

    • Full cycling capability for the deterministic and ensemble DA with UFS atmospheric-land global model:

      • Deterministic dual resolution 4DEnVar with hybrid background error covariance matrix. 

        • High-resolution departure computation at c768 resolution

        • Medium-resolution minimization at c384 resolution

      • Ensemble of Data Assimilations: 80 members with 3DVar at c384 resolution.

    • CRTM v3.1.0 implemented  

    • Separation of GNSS-RO quality checks to make independent of selected operator

  • skylab-weather-variable-grid-7_0 experiment:

    • Full cycling capability for the deterministic and ensemble DA with MPAS global atmospheric model:

      • Deterministic dual resolution 4DEnVar with hybrid background error covariance matrix. 

        • High-resolution departure computation at 15km-3km variable resolution centered on CONUS.

        • Medium-resolution minimization at 30km

      • Ensemble of Data Assimilations: 30 members with 3DVar at 30km resolution.

  • skylab-marine-7_0 experiment:

    • new SABER central block (EXPLICIT_DIFFUSION) used as an alternative to BUMP for small scale background error correlations

  • skylab-aerosol-weather-7_0 experiment:

    • 4DEnVar with GEOS at C90 resolution with 32 ensemble members 

      • Weather obs: radiosondes, windborne, satwinds_ssec_amv, AMSU_A (NOAA 15,18,19 and MetOP B,C), MHS (NOAA 19 and MetOP B, C)

      • Aerosol obs: VIIRS (NPP and NOAA 20), MODIS (Aqua and Terra)

  • skylab-trace-gas-7_0 experiment:

    • Minor updates to plots

  • Software infrastructure 

  • Tested for the following system requirements:

    • Amazon Web Services (AWS) Single Node AMI (RedHat 8; gnu)

    • Amazon Web Services (AWS) Parallel Cluster (Ubuntu 20.04; intel)

    • NASA Discover (gnu & intel)

    • NOAA Mississippi State University Orion (gnu & intel)

    • NOAA Mississippi State University Hercules (gnu & intel)

    • NOAA University of Wisconsin S4 (intel)

    • Limited support for NCAR-Wyoming Derecho (gnu & intel)

    • Limited support for NOAA ParallelWorks AWS, Azure, Gcloud (intel)

SkyLab has been developed by the JCSDA with contributions from its Partner Agencies in NOAA, NASA, the US Air Force, and the US Navy.

To read more about the release, links to the code, release notes and tutorials, visit www.jcsda.org/jediskylab .

Photo by Javier Miranda on Unsplash