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Dataset

 

MRF A755 ACTO flight: Airborne atmospheric and chemistry measurements taken on board the Met Office C-130 Hercules aircraft

Update Frequency: Not Planned
Status: Completed
Online Status: ONLINE
Publication State: Published
Publication Date: 2006-12-10
Download Stats: last 12 months

Abstract

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 A755 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.

The purpose of the flight was to investigate a dry slot behind a cold front to the North West of Scotland. Many interesting filaments of air were sampled. However, distinct 'stratospheric' filaments were not observed until the end of the flight.

After the initial end of science an interesting filament was sampled with high ozone (around 130ppb). We retraced our steps in order to fly through once more at science speed. This filament, at FL150, was further east than the forecast 'stratospheric air' filaments.

When the air of stratospheric origins was sampled it was found to have high ozone / low relative humidity as expected but it should be noted that there was also high PAN and slightly elevated black carbon.

The instruments generally worked well. The FWVS had to have the odd adjustment in flight and then found to maintain a good correlation with the GE; the peroxide began to loose flow at around FL245 and the CO was found to have a small leak of cabin air, which was corrected by 13:50. The CO was also found to be influenced by the flow through the PSAP. The CO did not show much structure during the flight until near the end when the air with stratospheric characteristics was observed.

Meteorology

An anticyclone was centred to the east of the North Sea and a waving front positioned to approximately along 7 west. The frontal cloud was quite apparent on the way to the operational area. However, a flight level (FL140) was found above most of the cloud, for the NOxy calibrations. Once past the frontal cloud there was little cloud in the operational area: just some thin cirrus.

Citable as:  Met Office; Barjat, H.; Brough, N.; Carney, R.; Penkett, S.A.; Lewis, A.C.; Methven, J.; McQuaid, J.; Phillips, G.J.; Purvis, R.M.; Reeves, C.E. (2006): MRF A755 ACTO flight: Airborne atmospheric and chemistry measurements taken on board the Met Office C-130 Hercules aircraft. NCAS British Atmospheric Data Centre, date of citation. https://catalogue.ceda.ac.uk/uuid/1e4cb62947da412f8629de448c276f47
Abbreviation: Not defined
Keywords: UTLS, ACTO, Chemistry, temperature, pressure, wind

Details

Previous Info:
No news update for this record
Previously used record identifiers:
No related previous identifiers.
Access rules:
Public data: access to these data is available to both registered and non-registered users.
Use of these data is covered by the following licence: http://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/. When using these data you must cite them correctly using the citation given on the CEDA Data Catalogue record.
Data lineage:

Data collected by instruments on-board the MRF C-130 during flight A755. Data acquired by BADC for archiving during the ACTO project.

Data Quality:
unknown.
File Format:
Data are ASCII formatted

Related Documents

No documents related to this record were found.

Process overview

This dataset was generated by instruments deployed on platforms as listed below.

Instrument/Platform pairings

MRF: Penny and Giles E23001 Deployed on: Met Office C-130 Hercules Aircraft
MRF: JNO2 radiometers Deployed on: Met Office C-130 Hercules Aircraft
MRF: Total Water Content (TWC) probe Deployed on: Met Office C-130 Hercules Aircraft
MRF: Condensation Nucleus Counter Model 3025A Deployed on: Met Office C-130 Hercules Aircraft
MRF: ROSEMOUNT 1201F Deployed on: Met Office C-130 Hercules Aircraft
MRF: NowStar XR5 GPS Deployed on: Met Office C-130 Hercules Aircraft
MRF - C-130 - De-iced (Rosemount 102BL) and non de-iced (Rosemount 102AL) temperature sensors Deployed on: Met Office C-130 Hercules Aircraft
MRF: TECO 49 UV photometric ozone instrument Deployed on: Met Office C-130 Hercules Aircraft
MRF: Cloud Physics Deployed on: Met Office C-130 Hercules Aircraft
MRF: In Cloud Temperature probe Deployed on: Met Office C-130 Hercules Aircraft
MRF - C-130 - Passive Cavity Aerosol Spectrometer Probe (PCASP) Deployed on: Met Office C-130 Hercules Aircraft
MRF - C-130 - Aethalometer - Particle Soot AbsorptionPhotometer (PSAP) Deployed on: Met Office C-130 Hercules Aircraft
MRF - C-130 - Carbon Monoxide monitor (CO) instrument Deployed on: Met Office C-130 Hercules Aircraft
MRF: Johnson-Williams Liquid Water Content Meter Deployed on: Met Office C-130 Hercules Aircraft
UEA: NOxy 4 channel NO, NO2, NOy, NOy* chemiluminescence analyser Deployed on: Met Office C-130 Hercules Aircraft
MRF - C-130 - PAN gas chromatograph Deployed on: Met Office C-130 Hercules Aircraft
UEA: Peroxides instrument Deployed on: Met Office C-130 Hercules Aircraft
MRF- C-130 - Fast Forward Scattering Spectrometer Probe (FFSSP) Deployed on: Met Office C-130 Hercules Aircraft
MRF: Entech-GC-MS Deployed on: Met Office C-130 Hercules Aircraft
MRF: PTV-GC-FID Deployed on: Met Office C-130 Hercules Aircraft

Mobile platform operations

Mobile Platform Operation 1 MRF Flight C-130 A755
Output Description None

No variables found.

Coverage
Temporal Range
Start time:
2000-05-14T10:01:35
End time:
2000-05-14T10:01:35
Geographic Extent

 
60.0000°
 
-10.0000°
 
-3.0000°
 
55.0000°