HD(CP)2 long term observations, atmospheric boundary layer height derived from aerosol profile data of Ceilometer (no. 00), by Supersite JOYCE, data version 00
Daily files of Mixing layer height from JOYCE ceilometer aerosol backscatter, level-2 data
Access
To get a year dataset please use one of the links below to download the wget script:
2013,
Dataset Author
Anne Hirsikko (anne.hirsikko@fmi.fi), Institution: Research Center Juelich, Institute for Energy and Climate research (IEK-8)Description
In daily data set files, following level 2 products are included: 1) mixing layer height from aerosol backscatter (zmlaa) based on STRAT-2D algorithm, 2) aerosol layer heights (zal) also based on STRAT-2D algorithm (Haeffelin et al., 2012; Morille et al., 2007). Additionally, uncertainty and bias for the variable zmlaa based on analysis in Schween et al. (AMT, 2014) are given.
Limitations: Observations are only available if backscattering targets like aerosol particles and cloud droplets are present with sufficient quantity. It must be noted that the zmlaa is highly biased during full overcast. Therefore, it is recommend to use zmlaa only if cloudiness is less than 5/8 octas.
Provenance: Data of JOYCE, Processed by IGMK, University of Cologne
Comments: Mixing layer and aerosol layer heights from ceilometer aerosol backscatter profiles are based on STRAT-2D algorithm (Morille et al., BAMS, 2007). Uncertainty and bias estimations are based on analysis in Schween et al., AMT, 2014.
Instrument 1
- Source: Jenoptik CHM15k ceilometer: ID CHM120109, serlom TUB120017, software version 12.03.1 2.13 0.719
- Descriptive Instrument location: The Ceilometer is installed at the JOYCE; on the roof of the Institute for Climate and Energy Research, Research Center Juelich.
Global information
- PID: de.koeln.rrzk/amd.de.sups/joy.ceilo00.l2.zmlaa
- Project: HD(CP)2
- Level: 2
- Updated version: 00
- File format: NETCDF3_CLASSIC
- Convention: CF-1.6 where applicable
- Average File Size Uncompressed: 0.02 Mb
- File name: sups_joy_ceilo00_l2_zmlaa_v[VV]_[YYYYMMDDhhmmss].nc
- Start: 2013-03-08
- End: 2013-12-29
Variables
| Name | Dimension | CF standard_name | long_name | Unit |
|---|---|---|---|---|
| zal | time, nlayer | height of aerosol layer | m | |
| zmlaa | time | mixing layer height from aerosol | m | |
| zmlaa_bias | time | bias of mixing layer height from aerosol | m | |
| zmlaa_uncty | uncertainty of mixing layer height retrieval from aerosol | % | ||
| zsl | altitude | altitude above mean sea level | m |
Institution
Contact Person(s)
Ulrich Loehnert (loehnert@meteo.uni-koeln.de)
References
M. Haeffelin, F. Angelini, Y. Morille, G. Martucci et al.,Evaluation of Mixing-Height Retrievals from Automatic Profiling Lidars and Ceilometers in View of Future Integrated Networks in Europe
J. H. Schween, A. Hirsikko, U. Loehnert, and S. Crewell,Mixing layer height retrieval with ceilometer and Doppler lidar: from case studies to long-term assessment
M. Haeffelin, F. Angelini, Y. Morille, G. Martucci et al.,Evaluation of Mixing-Height Retrievals from Automatic Profiling Lidars and Ceilometers in View of Future Integrated Networks in Europe
Y. Morille, M. Haeffelin, P. Drobinski, J. Pelon,STRAT: An Automated Algorithm to Retrieve the Vertical Structure of the Atmosphere from Single-Channel Lidar Data