LASSO Data Bundles Released for 2018 Shallow Convection Season

Published: 19 August 2019
LASSO cross section
A cross section from a LASSO simulation using the 75-km Multiscale Data Assimilation large-scale forcing on May 23, 2018 (17 UTC), shows vertical velocity (W, colors) with overlaid contours of cloud water content (10−6 kg kg−1), which indicate cloud locations at ARM’s Southern Great Plains atmospheric observatory. The tendency for clouds to be rooted to thermals reaching toward the surface is evident.

The Large-Eddy Simulation (LES) ARM Symbiotic Simulation and Observation (LASSO) data set has grown by 30 new case dates with the release of the 2018 spring-summer shallow convection season for the Atmospheric Radiation Measurement (ARM) user facility’s Southern Great Plains atmospheric observatory. Each of the 30 dates includes an ensemble of eight simulations, for a total of 240 new data bundles.

The LASSO data set focuses on shallow convection with LES output provided to help researchers bridge the gap from ARM’s observations to larger scales. This can be useful for parameterization development, theoretical studies, and observation proxies for unmeasurable quantities.

Each LASSO data bundle consists of:

  • a suite of observations focusing on shallow convection
  • the LES output for the given day
  • the surface fluxes and large-scale forcing needed to reproduce the LES results
  • skill scores and diagnostic details identifying how the LES behaved.

Details regarding the data bundle contents and LES configuration are in the updated Description of the LASSO Data Bundles Product (Gustafson et al. 2019).

Users can download the new data bundles for 2018 from the LASSO Bundle Browser, along with previously released bundles from 2015 to 2017. A full list of available data bundles is provided via the LASSO Metadata Table.

Questions about LASSO can be sent to Researchers interested in receiving LASSO updates and other related information can join the LASSO email list.

Reference: Gustafson W, A Vogelmann, X Cheng, KK Dumas, S Endo, KL Johnson, B Krishna, Z Li, T Toto, and H Xiao. 2019. Description of the LASSO Data Bundles Product. Ed. by Robert Stafford, DOE Atmospheric Radiation Measurement (ARM) user facility. DOE/SC-ARM-TR-216, doi:10.2172/1469590.

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ARM is a DOE Office of Science user facility operated by nine DOE national laboratories.