HD(CP)2 long term observations, cloud base altitude data of Ceilometer network (no. 00), HD(CP)2 full domain observation by GeoMet, Uni Cologne, data version 03
Ceilometer cloud base altitudes
Access
To get a year dataset please use one of the links below to download the wget script:
2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018,
Dataset Author
Christopher Frank (cfrank@meteo.uni-koeln.de), Institution: University of Cologne Institute for Geophysics and MeteorologyDescription
Cloud base altitude for a maximum of three cloud layers. Time steps where an instrument did not measure are flagged with _FillValue. Time steps where an instrument did measure but detected no cloud - either because of clear sky or because the lowest cloud layer was too thick to detect potential cloud layers lying above - are flagged with missing_value.
Limitations: Second and third cloud layer only detectable if first (lowest) cloud layer is not optically too thick.
Provenance: Data of DWD Ceilometer network, provided by IMGK, University of Cologne.
Comments: _FillValue=-999 indicates that the respective instrument was measuring but that no zcb was retrieved. The reason could be either clear-sky or an undetected upper cloud layer because the lowest cloud layer was too optically thick to be penetrated. missing_value=-888 indicates that the respective instrument was not measuring.
Instrument 1
- Source: Ceilometer network
- Descriptive Instrument location: Ground-based Ceilometer network. For exact location see respective variables in netCDF file.
Global information
- PID: de.koeln.rrzk/amd.de.hdfd/igmk.cmnet00.l2.zcb
- Project: HD(CP)2
- Level: 2
- Updated version: 03
- File format: NETCDF3_CLASSIC
- Convention: based on CF-1.6
- Average File Size Uncompressed: 0.3 Mb
- File name: hdfd_igmk_cmnet00_l2_zcb_v[VV]_[YYYYMMDDhhmmss].nc
- Start: 2007-01-01
- End: 2018-04-30
Variables
| Name | Dimension | CF standard_name | long_name | Unit |
|---|---|---|---|---|
| stat_id | n_station | none | station_id | none |
| stat_long | n_station, stat_long_len | none | station_long_name | none |
| zcb | time, n_station, n_cloudlayer | cloud_base_altitude | cloud_base_altitude_above_mean_sea_level | m |
| zsl | n_station | altitude | altitude_above_mean_sea_level | m |
Institution
Contact Person(s)
Susanne Crewell (crewell@meteo.uni-koeln.de)
References
CEILOMETER CT25K User’s Guide
Jenoptik CHM 15k - Nimbus Ceilometer
CEILOMETER CT25K User’s Guide