Data Announcements

New and Improved Ceilometer Datastream Available
Jan 26, 2015       
Recently, the datastream for the ceilometer instrument for all sites were reprocessed. This end-to-end reprocessing task corrected a couple of problems in the formatting of CEIL data and resulted in a new datastream name. First, the “V” in VCEIL was dropped because it represented the name of the vendor. New data standards for ARM require that [...]

Read more

New MICROARSCL Evaluation Data Released for Barrow, Alaska
Jan 23, 2015       
A new evaluation release of 18 months of data from Barrow, Alaska, provides the first KAZR-based Micro-Active Remote Sensing of Clouds (MICROARSCL) data from this North Slope of Alaska (NSA) site. The addition of the KAZR data to the NSA site adds additional temporal and spatial resolution relative to the retired Millimeter Wavelength Cloud Radar [...]

Read more

An Update of WACR-ARSCL: Evaluation VAP Data Available
Jan 23, 2015       
New data sets from the 95 GHz W-band ARM Cloud Radar-Active Remote Sensing of Clouds (WACR-ARSCL) are now available for download as an evaluation value-added product (VAP) for the ARM Mobile Facility (AMF) deployments in Hyytiälä, Finland, from February through September 2014, and Manacapuru, Brazil, from January through December 2014. Evaluation data have been previously [...]

Read more

Droplet Number Concentration Value-Added Product Now Operational
Oct 20, 2014       
Cloud droplet number concentration is an important factor in understanding aerosol-cloud interactions. As aerosol concentration increases, it is expected that droplet number concentration will increase and droplet size will decrease for a given liquid water path. This will greatly affect cloud albedo as smaller droplets reflect more shortwave radiation; however, the magnitude and variability of [...]

Read more

2D Best Estimate Data Sets From MC3E Now Available
Oct 14, 2014       
Data sets for the ARM Best Estimate 2-Dimensional Grid (ARMBE2DGRID) and Station-based Surface (ARMBESTNS) are now available for the Midlatitude Continental Convective Clouds Experiment (MC3E) period, which occurred during April to June 2011. The primary goal of these two data sets is to provide 2-dimensional (2D) spatial data of important surface variables to facilitate studies on [...]

Read more

Large-Scale Forcing Data from the R/V Roger Revelle
Oct 10, 2014       
Constrained variational analysis forcing data centered at the R/V Roger Revelle are now available for the Dynamics of the Madden-Julian Oscillation (DYNAMO) and the ARM Madden-Julian Oscillation [MJO] Investigation Experiment [AMIE] on Gan Island, or AMIE-Gan field campaign. Due to the lack of a sounding array on the Revelle, these forcing data were developed based on [...]

Read more

Large-Scale Forcing Data for AMIE-GAN Updated
Oct 08, 2014       
The ARM Madden-Julian Oscillation [MJO] Investigation Experiment [AMIE] on Gan Island, or AMIE-Gan field campaign collected necessary data for studies of the initiation, propagation, and evolution of MJO and its association with convective clouds. In order to enable single column and/or high-resolution model simulations of the field campaign period, model forcing data sets were developed. Three [...]

Read more

High-Vertical Resolution Soundings Available for SGP and NSA
Sep 29, 2014       
The ARM External Data Center (XDC) now provides atmospheric soundings—vertical measurements of the atmospheric column—in 1-second resolutions collected by the National Weather Service (NWS) in netCDF format to the ARM Data Archive. Quality control is added by the University Corporation for Atmospheric Research. These weather balloon soundings record temperature, pressure, altitude, humidity, and winds for three [...]

Read more

Microwave Radiometer Retrieval Data Available for AMF Sites
Jul 22, 2014       
The Microwave Radiometer Retrievals (MWRRET) value-added product (VAP) has now been processed for the following ARM Mobile Facility (AMF) deployments: Black Forest, Germany Shouxian, China Niamey, Niger, West Africa Graciosa Island, Azores. Preliminary data are also available for the MAGIC deployment of the AMF in the evaluation area of the ARM Data Archive. The MAGIC data do not currently include [...]

Read more

MICROARSCL Evaluation Data Released: Harnessing the Power of Radar Doppler Spectra
Jun 27, 2014       
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 power of particle diameter), thus enabling the identification of both small and large particle populations in a radar [...]

Read more

New Best Estimate Data Available for WACR-ARSCL
Jun 19, 2014       
New data from the 95 GHz W-band ARM Cloud Radar-Active Remote Sensing of Clouds (WACR-ARSCL) value-added product (VAP) (Kollias and Miller, 2007) are now available in the ARM Data Archive. In addition to the WACR data, this VAP uses observations from the micropulse lidar and ceilometer to produce cloud boundaries and time-height profiles of cloud [...]

Read more

Forcing Data for MC3E Updated
May 16, 2014       
Large-scale forcing data from the Midlatitude Continental Convective Clouds Experiment (MC3E) have been revised based on the recent update to MC3E sounding data for improved dry bias correction. These include both the ensemble forcing, which is based on uncertainties in precipitation, and the multi-domain forcing data sets over the 300 km, 150 km, and 75 [...]

Read more

Ceilometer Derived Planetary Boundary Layer Height Datastream Available
May 05, 2014       
Planetary Boundary Layer (PBL) height data are now being collected at ARM sites and mobile facilities using an enhanced gradient method algorithm from the Vaisala Ceilometers (VCEIL). These data are part of a new datastream available to the ARM and broader scientific community thanks to an evaluation conducted to compare the PBL height measurement from [...]

Read more

Standards for ARM Data Assure Consistency, Sustainability
May 02, 2014       
To sustain and enable consistent use and analysis of multiyear data sets by the scientific community, the newly published ARM Data Standards Version 1.0 details the required and recommended standards for ARM data.

Read more