ARM

Tag: SGP

  • Convective Vertical Velocity Data Ready for Evaluation

    A cross-section of the atmosphere over the Billings, Oklahoma, radar wind profiler (RWP) at 22:12 UTC on May 23, 2011. The x-axis shows the location of the RWP (-14.5 km) in relation to the SGP Central Facility (0 km). The y-axis shows height above the surface. The bar on the right-hand side shows reflectivity. Contours…

  • New Evaluation Product Provides Improved Eddy Correlation Data

    This figure describes the process used to generate the QCECOR VAP. Click to enlarge.Eddy correlation flux measurement systems (ECOR) are used by ARM to provide surface turbulence flux measurements. The Quality Controlled Eddy Correlation Flux (QCECOR) value-added product (VAP) improves the ECOR data by applying the following quality control (QC) procedures: Eddy correlation corrections Determination…

  • New Radar Data Lead to New Value-Added Product

    This sample KAZR-ARSCL plot shows data from the SGP on April 26, 2011. The top image shows the ‘reflectivity_best_estimate’ field, and the lower image shows cloud base and cloud top heights for all cloud layers detected on this day.The Ka-band ARM zenith radars (KAZRs) have replaced the long-serving millimeter-wavelength cloud radars (MMCRs). As a result,…

  • 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…

  • New Aerosol Best-Estimate Data Available as Value-Added Product

    Quicklook plots of monthly time series are generated for column AOD, vertical profiles up to 4 km of SSA and g, and for the corresponding RH profile. The optical properties are shown for the nominal green wavelength of 500 nm. The Aerosol Best Estimate (ABE) value-added product (VAP) provides best-estimate time series of total column…

  • Five Years of Radiatively Important Parameters Best Estimate (RIPBE) Data Now Available

    Scientists use detailed state-of-the art radiative transfer models to understand the radiative impact of clouds and aerosols on the Earth’s radiation budget, evaluate remote-sensing retrievals of cloud and aerosol properties, and develop and evaluate simpler radiative transfer models for inclusion in cloud and climate models. The ARM suite of instruments measures all of the radiatively…

  • 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…

  • Raman Lidar Data Product Suite Provides Best-Estimate Data

    Example of plots produced by the Raman lidar best-estimate VAP for April 3, 2011. Panels (a), (b), and (c) show time-height cross-sections of relative humidity, aerosol backscatter coefficient, and aerosol depolarization. A time series of aerosol optical depth is shown in panel (d). Click to view full-size image. Science data products derived from the Raman…