ARM

Category: Data Announcements

  • 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…

  • ARM Cloud Retrieval Ensemble Data Set Available for Evaluation

    Multiple long-term cloud retrievals are now available for five ARM sites in the ACRED data set. A new ARM evaluation product, the ARM Cloud Retrieval Ensemble Data Set (ACRED), is now available for testing by the science community. ACRED was developed with the motivation to provide a rough estimate of the uncertainties in current retrieved…

  • New Surface Spectral Albedo VAP Provides Surface Type Observations at Southern Great Plains

    Example quicklook from the SURFSPECALB VAP. The plot shows the estimated spectral albedo at SGP for the 10-m and 25-m towers on September 11, 2004. On this day, the surface type for both towers is partial vegetation. The Surface Spectral Albedo (SURFSPECALB) value-added product (VAP) has been released for operational production at the Southern Great…

  • Lidar Value-Added Product Provides Cloud Measurements

    Sample plot generated by MPLCMASK. Click to enlarge. Lidar cloud boundaries are a useful tool for identifying cloud base height and cloud thickness in optically thin clouds. The Micropulse Lidar Cloud Mask (MPLCMASK) value-added product (VAP) provides cloud base height, cloud top height, and backscatter coefficient for non-polarized micropulse lidar measurements. In addition, depolarization ratio…

  • Microwave Radiometer Retrieval Data Available for ARM Sites

    An example plot from the MWRRET VAP for 10/8/1999 at SGP. (top) Brightness temperatures measured by the MWR; orange and blue lines indicate potential measurement spikes due to precipitation, (middle) retrieved precipitable water vapor from the new physical method (blue) and the original statistical method (green), (bottom) retrieved liquid water path from the new physical…

  • Radiatively Important Parameters Best Estimate Data Available for Southern Great Plains

    The upper panel shows the output aerosol extinction field in RIPBE, and the bottom panel shows the quality control (qc) flags on aerosol extinction. Descriptions of the qc flags are given in the netCDF file header. In this case, the gold and pink qc flags on the aerosol extinction indicate periods at the top of…

  • Long-Term, Large-Scale Ensemble Forcing Data Set for Darwin Available

    A new data set is now available for the ARM Tropical Western Pacific site in Darwin for long-term, large-scale forcing data. Produced by Dr. Christian Jakob’s group at Monash University in Melbourne, Australia, these data were constrained with C-POL radar retrieved rainfall through the variational analysis method (Zhang and Lin 1997) by using the European…

  • More Climate Modeling Best Estimate Data Available for More Sites

    Soundings and surface meteorological measurements are now available for five ARM sites in the CMBE data set.The latest release of the Climate Modeling Best Estimate (CMBE) data set has added soundings and surface meteorological measurements in the CMBE-ATM datastream for Barrow, Alaska, and all three Tropical Western Pacific sites. For these four sites, the cloud…

  • New Datastream Identifies Nauru Data Influenced by Clouds

    A new data set that identifies periods when Nauru data may be affected by island-influenced clouds has been produced by Chuck Long, site scientist for the ARM Tropical Western Pacific site. The Nauru island effect (NIE) data set currently covers the period from September 2005 to May 2010 and will be updated periodically as new…

  • Tandem Differential Mobility Analyzer (TDMA) Data Available at the ARM Data Archive

    Dry samples are collected by the aerosol stack and transferred inside the Aerosol Observation System structure to the TDMA where they are exposed to humidity for growth rate sampling. For more details on how the TDMA works, see this [http://collinsgroup.tamu.edu/images/TDMAschematic.jpg][schematic]. ARM file photo.Over four years of data from the Tandem Differential Mobility Analyzer (TDMA), including…