ARM

Tag: LASSO

  • LASSO Data Bundles Released for 2018 Shallow Convection Season

    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…

  • 30 New Case Dates Released for LASSO

    This skill score comparison shows cloud fraction results from the large-eddy simulation compared with total sky imager (TSI) observations. Each number represents a different ensemble member from the July 21, 2017, case. The Large-Eddy Simulation (LES) ARM Symbiotic Simulation and Observation (LASSO) team has processed and released 30 new case dates for the 2017 spring-summer…

  • New Cloud Type VAP and Visualization Available

    A new data product—the Cloud Type Classification (CLDTYPE) value-added product (VAP)—provides an automated cloud type classification based on macrophysical quantities derived from vertically pointing lidar and radar. Up to 10 layers of clouds are classified into seven cloud types based on predetermined and site-specific thresholds of cloud top height, cloud base height, and thickness. Inputs…

  • LASSO Alpha 2 Supplement Includes 2015 Case Dates

    Plots from the Alpha 2 supplement show observed versus simulated cloud fraction for simulation number 13 on June 6, 2015. The plots show observed cloud fraction (top panel) retrieved from the Active Remote Sensing of CLouds (ARSCL) product using the Ka-Band ARM Zenith Radars (KAZRARSCL) product, the simulated cloud fraction (middle panel) based on large-eddy…

  • Continuous Large-Scale Forcing Data Now Available for Cloud Modeling From Southern Great Plains

    The seasonal cycle of Southern Great Plains domain-averaged latent heat (LH) and sensible heat (SH) fluxes is shown by using QCECOR-only (QCECOR), BAEBBR-only (BAEBBR), and both QCECOR and BAEBBR data (merged) averaged from 2004-2015, and the impact to the derived large-scale vertical velocity (omega). Version 2 of the continuous forcing value-added product uses the merged…

  • Alpha 1 of ARM’s New Modeling Effort Now Released

    The Southern Great Plains megasite plays a crucial role in a new modeling effort to complement ARM’s suite of instruments.In May 2015, the Department of Energy (DOE) Atmospheric Radiation Measurement (ARM) Climate Research Facility began a pilot project to design a routine, high-resolution modeling capability to complement ARM’s extensive suite of measurements at the Southern…