Turbulence Properties at the ENA site
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 ofvariance of vertical air motion, skewness of vertical air motion, updraft streng...
| Main Authors: | , , |
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| Language: | unknown |
| Published: |
2022
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| Subjects: | |
| Online Access: | http://www.osti.gov/servlets/purl/1832166 https://www.osti.gov/biblio/1832166 https://doi.org/10.5439/1832166 |
| Summary: | 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 ofvariance 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 ... |
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