BGS Hosted Metadata
MRF A756 ACTO flight: Airborne atmospheric and chemistry measurements taken on board the Met Office C-130 Hercules aircraft
The Meteorological Research Flight (MRF) was a Met Office facility, which flew a well-instrumented C-130 Hercules aircraft for atmospheric research purposes.
This dataset contains airborne atmospheric and chemistry measurements taken on board the Met Office C-130 Hercules aircraft flight A756 for the Atmospheric Chemistry and Transport of Ozone in the upper troposphere-lower stratosphere (UTLS) (ACTO) campaign. The flight was located over the North Atlantic.
"Stratospheric Studies, with a low tropopause
The tropopause was crossed in this experiment in order to study true stratospheric air with the available instrumentation. Ozone mixing ratios of up to 400ppb were measured and the corresponding CO mixing ratios were around 30 ppb. The discrimination between the two NOy channels was quite apparent: indicating a clear presence of HNO3. PAN was just detectable in this air.
On descending back below the tropopause, at around 22,000ft, it was noted that the NOy channel, with the Rosemount inlet, was suddenly found to measure more NOy than the other NOy channel. This correlated better with a change in humidity than with the change in temperature. It has been suggested that the change in conditions causes nitrogen compounds (HNO3?) to be 'flushed off' the inlet. Suggestions have been made to change the inlet to the make it identical to the other inlet (backward facing PFA). The instruments generally worked well. There were some problems with the peroxide, as the flows were very poor, at FL270 and above, and the formaldehyde was measuring high values, thought to be due to a leak in the inlet line. The carbon monoxide instrument showed good anti-correlation with the ozone, after the first run at FL250 (when there were problems due to blockages affecting the flow to the optical filter). It was observed that the HORACE reading is high by about 15 ppb relative to the PC reading.
Meteorology
The situation was dominated by a low pressure system centred over Ireland (centre pressure 1000mb). The associated low tropopause made the situation ideal for studying stratospheric chemistry with the C-130.
Simple
- Date (Publication)
- 2006-12-10T03:09:18
- Date (Creation)
- 2006-12-10T03:09:18
- Citation identifier
- https://catalogue.ceda.ac.uk/uuid/39690f3052054a60b22a67b4692cbfb4
- Citation identifier
- NCAS British Atmospheric Data Centre (NCAS BADC) / 39690f3052054a60b22a67b4692cbfb4
- Point of contact
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Organisation name Individual name Electronic mail address Role Met Office
Author Unavailable
Barjat, Hannah
Unavailable
Author Unavailable
Brough, Neil
Unavailable
Author Unavailable
Penkett, Stuart A.
Unavailable
Author Unavailable
Carney, R.
Unavailable
Author Unavailable
Lewis, Alastair C.
Unavailable
Author Unavailable
Methven, John
Unavailable
Author Unavailable
McQuaid, Jim
Unavailable
Author Unavailable
Phillips, G.J.
Unavailable
Author Unavailable
Purvis, Ruth Mary
Unavailable
Author Unavailable
Reeves, Claire E.
Unavailable
Author NCAS British Atmospheric Data Centre (NCAS BADC)
Custodian NCAS British Atmospheric Data Centre (NCAS BADC)
Distributor Unavailable
Penkett, Stuart A.
Unavailable
Principal investigator NCAS British Atmospheric Data Centre (NCAS BADC)
pointofContact NCAS British Atmospheric Data Centre (NCAS BADC)
Publisher
- Maintenance and update frequency
- Not planned
- Update scope
- Dataset
- Keywords
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UTLS
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ACTO
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Chemistry
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temperature
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pressure
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wind
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GEMET - INSPIRE themes, version 1.0
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atmospheric conditions
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- Access constraints
- Other restrictions
- Other constraints
- Access to these data is available to any registered CEDA user. Please Login or Register for a CEDA account to gain access.
- Use constraints
- Other restrictions
- Spatial representation type
- Grid
- Language
- English
- Topic category
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- Climatology, meteorology, atmosphere
))
- Begin date
- 2000-05-16T09:00:35
- End date
- 2000-05-16T11:23:55
- Unique resource identifier
- WGS 84
- Distribution format
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Name Version Data are ASCII formatted
- Distributor contact
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Organisation name Individual name Electronic mail address Role NCAS British Atmospheric Data Centre (NCAS BADC)
Distributor
- OnLine resource
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Protocol Linkage Name https://catalogue.ceda.ac.uk/uuid/39690f3052054a60b22a67b4692cbfb4 CEDA Data Catalogue Page
- OnLine resource
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Protocol Linkage Name http://data.ceda.ac.uk/badc/ukmo-mrf/data/a756 DOWNLOAD
- Hierarchy level
- Dataset
Conformance result
- Title
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Commission Regulation (EU) No 1089/2010 of 23 November 2010 implementing Directive 2007/2/EC of the European Parliament and of the Council as regards interoperability of spatial data sets and services
- Date (Publication)
- 2010-12-08
- Statement
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Data collected by instruments on-board the MRF C-130 during flight A756. Data acquired by BADC for archiving during the ACTO project.
Metadata
- File identifier
- 39690f3052054a60b22a67b4692cbfb4 XML
- Metadata language
- English
- Character set
- UTF8
- Parent identifier
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UTLS-Ozone ACTO: Met Research Flight (MRF) C-130 Hercules aircraft atmospheric chemistry measurements and model output collection
7ca95b35d9e378c10343f2730a880549
- Hierarchy level
- Dataset
- Date stamp
- 2026-04-15T02:10:55
- Metadata standard name
- UK GEMINI
- Metadata standard version
-
2.3
- Metadata author
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Organisation name Individual name Electronic mail address Role NCAS British Atmospheric Data Centre (NCAS BADC)
Point of contact
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