de.koeln.rrzk/amd.de.sups/joy.dlidCUST00.l2.windSAMD v.1.0enHD(CP)2sups_joy_dlidCUST00_l2_windHD(CP)2 long term observations, wind measurements data of DL -
scanning with varying elevation and azimuth (custom) (no. 00), by
Supersite JOYCE, data version 00Daily files of Doppler Lidar custom scanning (with varying
elevation and azimuth) wind data (3-beams)Anne Hirsikko (anne.hirsikko@fmi.fi)Research Center Juelich, Institute for Energy and Climate
research (IEK-8)2014-07-03 15:04:04 (CET)CF-1.6 where applicableexternalData processed with three_beam_wind_hdcp2_0.1.0 and
write_three_beam_wind_hdcp2_0.1.0 by University of CologneNETCDF3_CLASSIC3.3daily2For non-commercial use only. This data is subject to the
HD(CP)2/SAMD data policy to be found at https://doi.org/10.25592/uhhfdm.9823 and in the HD(CP)2/SAMD
Observation Data Product Standard https://doi.org/10.5281/zenodo.1741363.Data of JOYCE, processed by IMGK, University of CologneInstitute of Geophysics and Meteorology, University of
CologneUlrichLoehnert+49221 470 1779loehnert@meteo.uni-koeln.de2013-09-162013-12-3117none30The Doppler lidar is installed at the JOYCE; on the roof of
the Institute for Energy and Climate Research, Research Center
Juelich.In daily data set files following level 2 products
are included: (1) 3D wind vector components (u,v,w) (2) wind speed
(wspeed): speed of the horizontal wind (3) wind direction (wdir):
direction of the horizontal wind (4) error estimations for 3D wind
vector components (u,v,w), wind speed and wind direction. Data sources
were sups_joy_dlidCUST00_l1_any_v00*.nc files. Before calculating
u,v,w, wspeed, and wdir radial, velocity (dv) was masked with quality
mask (qdv), and data in clouds were removed by requiring that beta is
smaller than 1e-5. Quality mask qwind equals 1 if wspeed and wdir are
available. Uncertainty of variables was calculated based on error
propagation law, and by taking into account uncertainty of radial
velocity. Homogeneous wind filed was assumed.Measurements are only available if backscattering targets
like aerosols and cloud droplets are present. Applied beta threshold
does not guarantee that all hydrometeors (e.g. rain and ice crystals)
are removed from analysis. Uncertainty estimations do not take into
account effect of turbulence. Therefore, during convective situation
uncertainties of wspeed and wdir are likely higher than given ones,
and are indicated by temporally highly varying wind directions. Due to
various disturbances in conversion of lProcessed from custom scanning (with varying elevation and
azimuth) level 1 data found in HD(CP)2 data base. Three beam wind
retrieval. Uncertainty estimate takes into account only radial
velocity uncertainty.50.90856.4135111noneDetails of the instrument and data processing can be
found from attached PDF document.Long term observationsLocal observationsSupersitesJOYCELong term observationsLocal observationsVariable groupsAtmospheric stateLong term observationsLocal observationsInstrument groupsLidar 280 2 lon longitude longitude degrees_east lat latitude latitude degrees_north zsl altitude altitude above mean sea level m height height, height missing m height_bnds height, nv missing missing missing time time, time time seconds since 1970-01-01 00:00:00 UTC time_bnds time, nv missing missing missing wspeed time, height wind_speed missing m s-1 wdir time, height wind_from_direction missing degree u time, height eastward_wind missing m s-1 v time, height northward_wind missing m s-1 w time, height upward_air_velocity missing m s-1 errwspeed time, height missing wind speed uncertainty m s-1 errwdir time, height missing wind direction uncertainty degree erru time, height missing eastward wind uncertainty m s-1 errv time, height missing northward wind uncertainty m s-1 errw time, height upward air velocity uncertainty missing m s-1 qwind time, height missing quality mask of wind 1