Dataset
Met Office LIDARNET Eskdalemuir Jenoptik CHM15k Nimbus ceilometer cloud base and backscatter data
Update Frequency: Daily
Latest Data Update: 2025-01-17
Status: Ongoing
Online Status: ONLINE
Publication State: Published
Publication Date: 2015-07-28
Download Stats: last 12 months
Dataset Size: 317.61K Files | 164GB
Latest Info:
2025-12-09:
This dataset is temporarily unavailable for download from the CEDA archive. We are working on restoring access. Please see our latest news items for updates. - if you require a…
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Abstract
Cloud base and backscatter data from the Met Office's Jenoptik CHM15k Nimbus ceilometer located at Eskdalemuir, Dumfriesshire, Scotland. The Met Office's laser cloud base recorders network (LCBRs), or ceilometers, returns a range of products for use in forecasting and hazard detection. The backscatter profiles can allow detection of aerosol species such as volcanic ash where suitable instrumentation is deployed.
Citable as: Met Office (2015): Met Office LIDARNET Eskdalemuir Jenoptik CHM15k Nimbus ceilometer cloud base and backscatter data. Centre for Environmental Data Analysis, date of citation. https://catalogue.ceda.ac.uk/uuid/7d4ad4ec456644b29f2b72cede435702
Abbreviation: metoffice-jenoptick-chm15k-nimbus-ceilometer_eskdalemuir
Keywords: Met Office, lidar, ceilometer, ash
Details
| Previous Info: |
2025-12-09 This dataset is temporarily unavailable for download from the CEDA archive. We are working on restoring access. Please see our … Show More 2025-12-09 This dataset is temporarily unavailable for download from the CEDA archive. We are working on restoring access. Please see our latest news items for updates. - if you require access to this data in the meantime then please contact the CEDA helpdesk. Show Less |
|---|---|
| Previously used record identifiers: |
No related previous identifiers.
|
| Access rules: |
These data have multiple licences for different applications. Always make sure to read the appropriate licence for full data usage limitations details. Other usage may not be permitted.
Restricted data: please submit an application using the REQUEST ACCESS link for access. Use of these data is covered by the following licence(s): https://artefacts.ceda.ac.uk/licences/specific_licences/ukmo_agreement.pdf https://artefacts.ceda.ac.uk/licences/specific_licences/ukmo_agreement_gov.pdf When using these data you must cite them correctly using the citation given on the CEDA Data Catalogue record. |
| Data lineage: |
Data were collected by the Met Office before processed through the Met Office's Hermes system. A copy of these data were then delivered by the Met Office to CEDA for archiving. |
| File Format: |
Data are netCDF formatted
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Process overview
This dataset was generated by instruments deployed on platforms as listed below.
Instrument/Platform pairings
| Met Office: Lufft CHM15k Nimbus Ceilometer | Deployed on: Eskdalemuir Observatory |
| Output Description | None |
- units: m-1 sr-1
- long_name: Attenuated backscatter coefficient
- var_id: beta
- units: m-1 sr-1
- long_name: Attenuated backscatter coefficient - high resolution mode
- var_id: beta_hr
- units: m-1 sr-1
- long_name: Attenuated backscatter coefficient error
- var_id: beta_error
- units: m-1 sr-1
- long_name: Attenuated backscatter coefficient error - high resolution mode
- var_id: beta_error_hr
- units: ms
- long_name: Average time per profile
- var_id: average_time
- var_id: beta_raw
- long_name: Backscatter
- units: oktas
- long_name: Base cloud cover
- var_id: BCC
- long_name: Calibration factor applied in attenuated backscatter coefficient calculation
- var_id: calibration_factor
- units: km
- long_name: Cloud base height variation (STD)
- var_id: CBE
- units: m
- var_id: CDP
- long_name: Cloud depth
- units: m
- long_name: Cloud depth variation
- var_id: CDE
- units: m
- long_name: Cloud height offset
- var_id: CHO
- long_name: Decimal days since Jan. 1, 4713 B.C.E. 12:00:00 +00:00
- var_id: record
- units: km
- long_name: Height of cloudbases
- var_id: CBH
- units: nm
- var_id: wavelength
- long_name: LCBR wavelength
- units: degree
- long_name: Laser direction of site
- var_id: zenith
- units: m
- long_name: Maximum detection height
- var_id: MXD
- units: J
- long_name: Nominal laser pulse energy
- var_id: nominal_pulse_energy
- long_name: Number of laser pulses for each profile
- var_id: npulses
- long_name: Overlap function
- var_id: overlap
- long_name: Overlap function - high resolution mode
- var_id: overlap_hr
- long_name: Quality score for aerosol Layer in PBL
- var_id: PBS
- var_id: range
- units: km
- long_name: Range from antenna to the centre of each range gate
- units: km
- long_name: Range from instrument to top of boundary layer
- var_id: PBL
- long_name: Range to the centre of each range gate
- var_id: range
- units: km
- units: km
- long_name: Range to the centre of each range gate in high resolution mode
- var_id: range_hr
- long_name: Scale factor to be applied to attenuated backscatter for forecaster display purposes only
- var_id: display_scaler
- long_name: Sky Condition Index
- var_id: SCI
- long_name: System messages encoded as a 31bit unsigned int
- var_id: message_bits
- long_name: Total cloud cover
- var_id: TCC
- units: oktas
- units: km
- var_id: visibility
- long_name: Visibility in air
- units: km
- long_name: Visibility in air error (STD).
- var_id: visibility_error
- units: m
- standard_name: altitude
- var_id: altitude
- long_name: height of ground level above mean sea level
Co-ordinate Variables
- standard_name: time
- var_id: time
- units: hours
- long_name: Decimal hours from midnight UTC to the end of the measurement period
- units: degrees_north
- standard_name: latitude
- var_id: latitude
- long_name: latitude
- units: degrees_east
- standard_name: longitude
- var_id: longitude
- long_name: longitude
Coverage
Temporal Range
Start time:
2015-07-13T08:45:08
End time:
Ongoing
Geographic Extent
55.3170° |
||
-3.2000° |
-3.2000° |
|
55.3170° |
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