The Alpha 1 release contains initial data bundles from the large-eddy simulation (LES) ARM Symbiotic Simulation and Observation (LASSO) workflow pilot project for five shallow convection days from June and August 2015 plus an interface to a NoSQL approach to querying the simulation skill scores. These bundles represent initial model configurations, evaluation metrics, and products being considered for eventual automation for ongoing LASSO LES simulations. A data bundle is a unified package consisting of LASSO LES input and output, observations, evaluation diagnostics, and model skill scores. LES input includes model configuration information and forcing data. LES output includes profile statistics and full domain fields of cloud and environmental variables. Model evaluation data consists of LES output and ARM observations co-registered on the same grid and sampling frequency. Model performance is quantified by skill scores and diagnostics in terms of cloud and environmental variables.
For most purposes, the Alpha 1 simulations have been superseded by supplemental simulations added to Alpha 2 for the five case dates in 2015. Thus, users seeking LASSO simulations for 2015 should refer to the Alpha 2 set of data bundles. However, not all sensitivity comparisons were re-run for Alpha 2, and thus some users still may consider using the Alpha 1 product. Users interested in using the Alpha 1 simulations should see Appendix D in the Alpha 2 documentation update from April 2018 for details.