ARM

Tag: TWP

  • 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…

  • New Release of Radar CFAD Data Product for ARM Radar Simulator

    Measured radar reflectivity (top) and the calculated radar CFAD (bottom) are displayed for May 16, 2009. Updated: Newly released data are now included from the Southern Great Plains, North Slope of Alaska, and Tropical Western Pacific atmospheric observatories from 2011 to 2013. Previous radar CFAD data (nsaradarcfadC1.c1) for the period between 2006 and 2010 from the…

  • New Radiative Flux Analysis VAP Now Operational

    Radiative flux analysis data of irradiance and cloud fraction are shown here for the Southern Great Plains. The Radiative Flux Analysis VAP is an implementation of a series of algorithms that estimate clear-sky broadband surface irradiances, cloud fraction, optical depth, cloud transmissivity, and cloud radiative effects. This VAP is an updated version of the Shortwave…

  • MICROARSCL Evaluation Data Released: Harnessing the Power of Radar Doppler Spectra

    Four of the roughly 30 variables provided by MICROARSCL are shown here for a day in Barrow, Alaska. Since 2004, the ARM Climate Research Facility has collected continuous recordings of profiling radar Doppler spectra. These recorded spectra offer a powerful means for overcoming the dependency of radar measurements on particle size (proportional to the sixth…

  • Large-Scale Forcing Data Set for SPARTICUS Available

    Precipitation (top) and Omega (bottom) in April 2010 at SGP based on large-scale forcing data for SPARTICUS. A new large-scale forcing data set is now available for the Variational Analysis (VARANAL) value-added product (VAP) using data from the Small Particles in Cirrus (SPARTICUS) field campaign. The constrained variational objective analysis approach described in Zhang and…

  • New Value-Added Product Provides Tropospheric Temperature Measurements

    Sample output from the RLPROFTEMP VAP showing four selected months. Results are shown for (a) January 2009, (b) April 2009, (c) July 2009, and (d) October 2009.Temperature is one of the most fundamental atmospheric state variables and is crucial to the understanding of many meteorological processes. The Raman lidars at the ARM Climate Research Facility…

  • New Evaluation Product Provides Thermodynamic Variables from Multiple Instruments

    INTERPSONDE output from the SGP Central Facility during the Midlatitude Continental Convective Clouds Experiment from April 26, 2011. The Interpolated Sonde (INTERPSONDE) value-added product (VAP) is an intermediate step of the MERGESONDE VAP that produces a daily file of atmospheric state variables (temperature, humidity, pressure, and winds) from radiosonde soundings, the microwave radiometer, and surface…

  • Aerosol Optical Depth Measurements Available as Value-Added Product

    These two images show data plots of cloud-screened AOD at the AMF site in China collected on a 20-second interval during daylight hours. These two days show drastically different aerosol optical depths.Aerosol optical depth (AOD) is a measure of the total aerosol burden in the atmosphere. The spectral dependence of AOD, typically described by the…

  • Moving on Up: Merged Sounding Data Now a Value-Added Product

    Examples of relative humidity for SGP, NSA, and TWP-Darwin. The Merged Sounding evaluation product has moved into the ARM Data Archive as a value-added product (VAP). This Merged Sounding VAP, initially designed by Dr. Gerald Mace, was modified by software developer David Troyan under the scientific direction of Michael Jensen to better serve the ARM…

  • Aerosol Optical Depth Measurements Available as Value-Added Product

    Cloud-screened AOD at five wavelengths (top) and Angstrom exponent (bottom) over a three-month time period at the Black Forest, Germany deployment. Aerosol optical depth (AOD) measures total aerosol burden in the atmosphere. The spectral dependence of AOD, typically described by the Angstrom exponent, is also an indicator of particle size. Small Angstrom exponent values (near…