Dataset
Met Office LIDARNET Lerwick Jenoptik CHM15k Nimbus ceilometer cloud base and backscatter data
Update Frequency: Daily
Latest Data Update: 2023-06-19
Status: Ongoing
Online Status: ONLINE
Publication State: Published
Publication Date: 2015-07-29
Download Stats: last 12 months
Dataset Size: 287.52K Files | 136GB
Abstract
Cloud base and backscatter data from the Met Office's Jenoptik CHM15k Nimbus ceilometer located at Lerwick, Shetlands. 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 Lerwick Jenoptik CHM15k Nimbus ceilometer cloud base and backscatter data. Centre for Environmental Data Analysis, date of citation. https://catalogue.ceda.ac.uk/uuid/1218bb4b7ac243708546c7e59934005c/
Abbreviation: metoffice-jenoptick-chm15k-nimbus_lerwick
Keywords: Met Office, lidar, ceilometer, ash
Details
| Previous Info: |
No news update for this record
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|---|---|
| Previously used record identifiers: |
No related previous identifiers.
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| 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: Met Office Lerwick Meteorological Observatory, UK |
| Output Description | None |
- units: m-1 sr-1
- long_name: Attenuated backscatter coefficient
- var_id: beta
- names: Attenuated backscatter coefficient
- units: m-1 sr-1
- long_name: Attenuated backscatter coefficient - high resolution mode
- var_id: beta_hr
- names: Attenuated backscatter coefficient - high resolution mode
- units: m-1 sr-1
- long_name: Attenuated backscatter coefficient error
- var_id: beta_error
- names: Attenuated backscatter coefficient error
- units: m-1 sr-1
- long_name: Attenuated backscatter coefficient error - high resolution mode
- var_id: beta_error_hr
- names: Attenuated backscatter coefficient error - high resolution mode
- units: ms
- long_name: Average time per profile
- var_id: average_time
- names: Average time per profile
- var_id: beta_raw
- long_name: Backscatter
- names: Backscatter
- units: oktas
- long_name: Base cloud cover
- var_id: BCC
- names: Base cloud cover
- long_name: Calibration factor applied in attenuated backscatter coefficient calculation
- var_id: calibration_factor
- names: Calibration factor applied in attenuated backscatter coefficient calculation
- units: km
- long_name: Cloud base height variation (STD)
- var_id: CBE
- names: Cloud base height variation (STD)
- units: m
- var_id: CDP
- long_name: Cloud depth
- names: Cloud depth
- units: m
- long_name: Cloud depth variation
- var_id: CDE
- names: Cloud depth variation
- units: m
- long_name: Cloud height offset
- var_id: CHO
- names: Cloud height offset
- long_name: Decimal days since Jan. 1, 4713 B.C.E. 12:00:00 +00:00
- var_id: record
- names: Decimal days since Jan. 1, 4713 B.C.E. 12:00:00 +00:00
- units: km
- long_name: Height of cloudbases
- var_id: CBH
- names: Height of cloudbases
- units: nm
- var_id: wavelength
- long_name: LCBR wavelength
- names: LCBR wavelength
- var_id: azimuth
- long_name: Laser direction of site
- units: degree-clockwise
- names: Laser direction of site
- units: m
- long_name: Maximum detection height
- var_id: MXD
- names: Maximum detection height
- units: J
- long_name: Nominal laser pulse energy
- var_id: nominal_pulse_energy
- names: Nominal laser pulse energy
- long_name: Number of laser pulses for each profile
- var_id: npulses
- names: Number of laser pulses for each profile
- long_name: Overlap function
- var_id: overlap
- names: Overlap function
- long_name: Overlap function - high resolution mode
- var_id: overlap_hr
- names: Overlap function - high resolution mode
- long_name: Quality score for aerosol Layer in PBL
- var_id: PBS
- names: Quality score for aerosol Layer in PBL
- var_id: range
- units: km
- long_name: Range from antenna to the centre of each range gate
- names: 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
- names: Range from instrument to top of boundary layer
- long_name: Range to the centre of each range gate
- var_id: range
- units: km
- names: Range to the centre of each range gate
- units: km
- long_name: Range to the centre of each range gate in high resolution mode
- var_id: range_hr
- names: Range to the centre of each range gate in high resolution mode
- long_name: Scale factor to be applied to attenuated backscatter for forecaster display purposes only
- var_id: display_scaler
- names: Scale factor to be applied to attenuated backscatter for forecaster display purposes only
- long_name: Sky Condition Index
- var_id: SCI
- names: Sky Condition Index
- long_name: System messages encoded as a 31bit unsigned int
- var_id: message_bits
- names: System messages encoded as a 31bit unsigned int
- long_name: Total cloud cover
- var_id: TCC
- units: oktas
- names: Total cloud cover
- units: km
- var_id: visibility
- long_name: Visibility in air
- names: Visibility in air
- units: km
- long_name: Visibility in air error (STD).
- var_id: visibility_error
- names: Visibility in air error (STD).
- units: m
- standard_name: altitude
- var_id: altitude
- long_name: height of ground level above mean sea level
- names: altitude, height of ground level above mean sea level
Co-ordinate Variables
- standard_name: time
- var_id: time
- long_name: Decimal hours from midnight UTC to the end of the measurement period
- names: time, Decimal hours from midnight UTC to the end of the measurement period
- units: degrees_north
- standard_name: latitude
- var_id: latitude
- long_name: latitude
- names: latitude
- units: degrees_east
- standard_name: longitude
- var_id: longitude
- long_name: longitude
- names: longitude
Coverage
Temporal Range
Start time:
2015-07-13T08:45:21
End time:
Ongoing
Geographic Extent
60.1330° |
||
-1.1830° |
-1.1830° |
|
60.1330° |
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