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EASOE: Univerisity of College Wales Ozone DIAL LIDAR backscatter measurements at Aberystwyth, UK

The European Arctic Stratospheric Ozone Experiment is a European Commission (EC) measurement campaign undertaken in the Northern Hemisphere winter of 1991-92 to study ozone chemistry and dynamics. The dataset contains measurements of chemical constituents (concentrations of ozone and the members of the chlorine and nitrogen families) and meteorological parameters from European ground stations and balloon and aircraft flights, and from the ground-based ozone monitoring network. This dataset is public.

This dataset was produced using a Nd-YAG laser, 0.6m diameter mirror, two receiver channels - one for parallel and the other for perpendicular polarisation. Photon counting system; raw data collected at 30m resolution (both channels simultaneously). Each individual measurement takes 5 minutes (5000 shots). For the data here, all measurements for an individual evening have been combined. Usually, 2 or 3 consecutive runs were made, but on some evenings (e.g. December 6-9 1991) a large number of profiles were measured. Times of measurements are not given here but can be supplied on request; each was made within 4 hours of 2000 GMT and during hours of darkness. Detailed data for each run are also available on request.

To derive backscatter ratios, atmospheric density profiles were derived from ozonesondes launched from Aberystwyth during EASOE. These were corrected for air and ozone absorption. The top of the aerosol layer for each night was determined by inspection of the counts*height squared (Ch2) profile, and the average ratio of Ch2 to corrected density above this height was used to derive the backscatter ratio.

Correction for aerosol absorption was made using an extinction/backscatter ratio of 40, assumed constant throughout the layer.

For depolarisation ratio, the ratio of the two receiver channels is shown, corrected for the beamsplitter efficiency. Also, all the data have been normalised so that the lidar depolarisation ratio for air (above the aerosol layer) is 1.4%. (Note: this is different from the preliminary data).

Data are shown above 10 km, except where cirrus was present, when the altitudes contaminated by cirrus have been removed. Below 10 km, the count-rates were too high for the recorded data to be reliable. The upper height reported is that of the top of the aerosol layer.

Simple

Date (Publication)
2007-02-01T19:33:08
Date (Creation)
2007-02-01T19:33:08
Identifier
https://catalogue.ceda.ac.uk/uuid/28c36528dbc84ce3df6f6952b07f9cfe
Identifier
NCAS British Atmospheric Data Centre (NCAS BADC) / 28c36528dbc84ce3df6f6952b07f9cfe
Author
  Norwegian Institute for Air Research (NILU) - author
Norway
Custodian
  NCAS British Atmospheric Data Centre (NCAS BADC) - custodian
British Atmospheric Data Centre , STFC Rutherford Appleton Laboratory , Harwell Oxford , OX11 0QX , UK
+44(0)1235 446432
Distributor
  NCAS British Atmospheric Data Centre (NCAS BADC) - distributor
British Atmospheric Data Centre , STFC Rutherford Appleton Laboratory , Harwell Oxford , OX11 0QX , UK
+44(0)1235 446432
Principal investigator
  unknown - principal_investigator
pointofContact
  NCAS British Atmospheric Data Centre (NCAS BADC) - point_of_contact
British Atmospheric Data Centre , STFC Rutherford Appleton Laboratory , Harwell Oxford , OX11 0QX , UK
+44(0)1235 446432
Publisher
  NCAS British Atmospheric Data Centre (NCAS BADC) - publisher
British Atmospheric Data Centre , STFC Rutherford Appleton Laboratory , Harwell Oxford , OX11 0QX , UK
+44(0)1235 446432
Maintenance and update frequency
notPlanned Not planned
Update scope
dataset Dataset
Keywords
  • EASOE
  • ozone
  • Lidar
GEMET - INSPIRE themes, version 1.0
  • atmospheric conditions
Access constraints
otherRestrictions Other restrictions
Other constraints
Public data: access to these data is available to both registered and non-registered users.
Use constraints
otherRestrictions Other restrictions
Other constraints
Under the following licence https://artefacts.ceda.ac.uk/licences/missing_licence.pdf, appropriate use of these data may fall under unstated use. This message is intended as guidance, always read the full licence. When using these data you must cite them correctly using the citation given on the CEDA Data Catalogue record.
Spatial representation type
grid Grid
Metadata language
EnglishEnglish
Topic category
  • Climatology, meteorology, atmosphere
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Begin date
1991-11-11T00:00:00
End date
1992-03-29T23:00:00
Unique resource identifier
WGS 84
Distribution format
  • Data are NASA-Ames formatted ()

Distributor
  NCAS British Atmospheric Data Centre (NCAS BADC) - Data Center Contact
British Atmospheric Data Centre , STFC Rutherford Appleton Laboratory , Harwell Oxford , OX11 0QX , UK
+44(0)1235 446432
OnLine resource
CEDA Data Catalogue Page

Detail and access information for the resource

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Hierarchy level
dataset Dataset

Conformance result

Date (Publication)
2010-12-08
Statement
The final data were supplied to NILU for the whole EASOE campaign and placed on CD-ROM. This CD-Rom was then uploaded as-is into the BADC archive for browsing purposes.
File identifier
28c36528dbc84ce3df6f6952b07f9cfe XML
Metadata language
EnglishEnglish
Character set
8-bit variable size UCS Transfer Format, based on ISO/IEC 10646 UTF8
Parent identifier
European Arctic Stratospheric Ozone Experiment (EASOE): Airborne and Ground-Station Measurements of Meteorological Parameters 573d8ec65dd8ae5ee3f779946fbc2497
Hierarchy level
dataset Dataset
Date stamp
2025-05-09T02:12:46
Metadata standard name
UK GEMINI
Metadata standard version
2.3
Point of contact
  NCAS British Atmospheric Data Centre (NCAS BADC)
British Atmospheric Data Centre , STFC Rutherford Appleton Laboratory , Harwell Oxford , OX11 0QX , UK
+44(0)1235 446432
 
 

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Keywords

GEMET - INSPIRE themes, version 1.0
atmospheric conditions

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