The Alpha 2 release is the second, and final, early data release for the LASSO pilot phase. Alpha 2 builds upon Alpha 1 through improved large-eddy simulation models (LES), increased use of observations for evaluating the model, and testing of incorporation of ARM wind profiles in the data assimilation process.
Simulations are carried out for both classical shallow convection days as well as borderline shallow convection days to better understand the overall LES model and forcing capabilities for the SGP region. Complete details regarding differences between Alpha 1 and Alpha 2 can be found in Appendix B of the Alpha 2 documentation Alpha 2 documentation. A spreadsheet containing the complete list of simulations included in the Alpha 2 release is also available.
This release contains 544 simulations from 13 shallow convection days during spring–summer 2016. Simulations are packaged alongside corresponding model-observation comparisons for different LES models, large-scale forcings, model configurations, and preliminary observational products that the LASSO team is using to assess workflow options for use in operations.
Alpha 2 data bundles can be accessed via both Data Discovery and the Bundle Browser. The latter is designed specifically for LASSO and is more efficient for most researchers seeking LASSO data. The browser includes the ability to query for specific simulations and then provides links to data plots for each simulation and links to request delivery of the data bundles.
We recommend users contact the LASSO team for the details of the simulations and guidance for specific application.