Turbulence Properties at the ENA site

Ghate, Virendra; Surleta, Thomas; Cadeddu, Maria

doi:10.5439/1832166

Title: Turbulence Properties at the ENA site

Dataset
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Abstract

The data set includes the turbulence properties as derived from the data collected by the Doppler lidar (DL) at the ARM Eastern North Atlantic (ENA) site. Among the reported turbulence properties included are profiles of variance of vertical air motion, skewness of vertical air motion, updraft strength, downdraft strength, updraft fraction, and downdraft fraction. Due to the persistent presence of drizzle at the location, the DL echoes were classified as those corresponding to aerosols and drizzle using the backscatter cross-section threshold. This daily backscatter cross-section threshold is also reported. The data set begins on January 1, 2015 and ends January 1, 2021. The gaps in the data set correspond to the periods when the instrument was not operational. The header of the NetCDF file is as below. netcdf dl.turb.stats { dimensions: time = 52609; height = 241; threshold_time = 1828; variables: double time(time); time:Long_Name = "seconds since 1970-1-1"; time:units = "seconds"; double height(height); height:Long_Name = "height of the center of the range gate above ground"; height:units = "meters"; double echo_fraction(time, height); echo_fraction:Long_Name = "Fraction of hour with valid Doppler lidar echoes" ; echo_fraction:units = "N/A"; double wvar(time, height); wvar:Long_Name =more »« less

Authors:: Ghate, Virendra; Surleta, Thomas; Cadeddu, Maria

Publication Date:: 2015-01-01

DOE Contract Number:: DE-AC05-00OR22725

Research Org.:: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Atmospheric Radiation Measurement (ARM) Archive; Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Atmospheric Radiation Measurement (ARM) Data Center

Sponsoring Org.:: USDOE Office of Science (SC), Biological and Environmental Research (BER)

Collaborations:: PNNL, BNL, ANL, ORNL

Subject:: 54 Environmental Sciences

Keywords:: Atmospheric turbulence, ARM, DOE.

OSTI Identifier:: 1832166

DOI:: https://doi.org/10.5439/1832166

Citation Formats


                    Ghate, Virendra, Surleta, Thomas, and Cadeddu, Maria. Turbulence Properties at the ENA site.  United States: N. p., 2015. 
        Web.  doi:10.5439/1832166.

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                    Ghate, Virendra, Surleta, Thomas, & Cadeddu, Maria. Turbulence Properties at the ENA site.  United States.  doi:https://doi.org/10.5439/1832166

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                    Ghate, Virendra, Surleta, Thomas, and Cadeddu, Maria. 2015.  
"Turbulence Properties at the ENA site".  United States.  doi:https://doi.org/10.5439/1832166.  https://www.osti.gov/servlets/purl/1832166. Pub date:Thu Jan 01 00:00:00 EST 2015

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@article{osti_1832166,

  title        = {Turbulence Properties at the ENA site},

  author       = {Ghate, Virendra and Surleta, Thomas and Cadeddu, Maria},

  abstractNote = {The data set includes the turbulence properties as derived from the data collected by the Doppler lidar (DL) at the ARM Eastern North Atlantic (ENA) site. Among the reported turbulence properties included are profiles of variance of vertical air motion, skewness of vertical air motion, updraft strength, downdraft strength, updraft fraction, and downdraft fraction. Due to the persistent presence of drizzle at the location, the DL echoes were classified as those corresponding to aerosols and drizzle using the backscatter cross-section threshold. This daily backscatter cross-section threshold is also reported. The data set begins on January 1, 2015 and ends January 1, 2021. The gaps in the data set correspond to the periods when the instrument was not operational. The header of the NetCDF file is as below.   netcdf dl.turb.stats { dimensions:             time = 52609;             height = 241;             threshold_time = 1828; variables: double time(time);             time:Long_Name = "seconds since 1970-1-1";             time:units = "seconds"; double height(height);             height:Long_Name = "height of the center of the range gate above ground";             height:units = "meters"; double echo_fraction(time, height);             echo_fraction:Long_Name = "Fraction of hour with valid Doppler lidar echoes" ;             echo_fraction:units = "N/A"; double wvar(time, height);             wvar:Long_Name = "Variance of vertical air motion";             wvar:units = "m^2/s^2"; double wskew(time, height);             wskew:Long_Name = "Skewness of vertical air motion";             wskew:units = "N/A"; double updraft_velocity(time, height);             updraft_velocity:Long_Name = "Hourly averaged updraft velocity";             updraft_velocity:units = "m/s"; double downdraft_velocity(time, height);             downdraft_velocity:Long_Name = "Hourly averaged downdraft velocity";             downdraft_velocity:units = "m/s"; double updraft_fraction(time, height);             updraft_fraction:Long_Name = "Hourly updraft fraction";             updraft_fraction:units = "N/A"; double downdraft_fraction(time, height);             downdraft_fraction:Long_Name = "Hourly downdraft fraction";             downdraft_fraction:units = "N/A"; double threshold_time(threshold_time);             threshold_time:Long_Name = "Seconds since 1970-1-1 for the day";             threshold_time:units = "seconds"; double bscat_threshold(threshold_time);             bscat_threshold:Long_Name = "Backscatter threshold used for discerning lidar returns from hydrometeors and aerosols.";             bscat_threshold:units = "1/(m*Sr)"; }},

  doi          = {10.5439/1832166},

  journal      = {},

  number       = ,

  volume       = ,

  place        = {United States},

  year         = {2015},

  month        = {1}

}

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DOI: https://doi.org/10.5439/1832166

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