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Dataset

 

MRF A775 EXPORT 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 primary objective of the European eXport of Precursors and Ozone by long-Range Transport (EXPORT) project is to characterise and quantify the photochemical air pollution both forming over Europe and being exported eastwards from Europe. The data held at BADC was collected during a co-ordinated 3 aircraft flying campaign in August 2000 based at Oberpfaffenhofen in Southern Germany. Measurements were made of many photochemical parameters including ozone, its precursors, other oxidants and both gas phase and particulate tracers in the air over Europe and that being transported eastwards out of Europe.

This dataset contains airborne atmospheric and chemistry measurements taken on board the Met Office C-130 Hercules aircraft flight A775 for the EXPORT project. The flight was over Germany, Austria, Czech and Slovak Reps, and Poland.

Study of PBL Air over Czech Republic and southern Poland contrasted with Uplifted (N. American) air at ca. 25,000ft

The aim of the experiment was to observe two areas of polluted air, as forecast by RDF trajectory forecasts and the NILU model. The first area was forecast to be over the Czech Republic / southern Poland at low levels and the second was forecast to be over southern Poland / Germany at higher altitudes (ca. 26,000 to 29,000ft. Both the Mystere and Falcon aircraft only planned to sample the higher altitude polluted layer. The results from the Mystere were planned to feed back to the C-130, after sampling the low level air. Indeed communications from the Mystere were passed to the C-130 but probably made little difference to the eventual plan.

The flight was very interesting. The main science started with a profile into an airfield at Ostrava, Czech Republic. Bottles were filled during the descent into the airfield. These should show 'chemical age' difference above and below the boundary layer. Below the inversion at around FL045, a rather heavily polluted boundary layer was sampled in the Czech Republic / southern Poland. Several runs were carried out in this air, mostly at an altitude of approximately 3,000ft above ground. The flight area was mostly very heavily polluted, with several factory chimneys and at least one power station that was passed several times. Once above a more rural area the levels of primary pollutants dropped significantly, possibly indicating that a significant fraction of the primary pollutant concentrations were due to the local sources. The aircraft remained in the PBL for quite some time. This was partly due to the requests of the mission scientists but also because of having to wait to go into Polish airspace.

The second part of the flight was at higher level, between ca. 26,000 and 29,000ft, in order to sample uplifted air forecast to be of N. American origin. The air was certainly rich in CO (up to around 100ppb) but interestingly the ozone was anti-correlated with the CO. It is possible that the air had been uplifted in convection, in which case the ozone concentration might be anti-correlated with the CO, if there has been insufficient time for photochemical processing. Alternatively, boundary layer air (from either N. America or Europe) may have mixed with dry, ozone-rich UTLS air.

Most instruments performed well, the exception being the PSAP, which was very noisy. The NOxy worked well but reported loss of flow into the NOy1 inlet (NOy minus HNO3), above ca. FL240.

Meteorology

The surface chart showed a weak ridge of high pressure over central Europe. The midday analysis showed a frontal feature stretching from the North Sea, across NE Germany and into Southern Poland. Some troughing of the upper air.

Citable as:  EXPORT campaign participants; Met Office; Bandy, B.; Brough, N.; Carney, R.; Green, T.; Kent, J.; Lewis, A.C.; McQuaid, J.; Mills, G.; Oram, D.; Phillips, G.J.; Purvis, R.M.; Sturrock, G. (2006): MRF A775 EXPORT 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/e59b89e87dd646519cefc38d67879a9d
Abbreviation: Not defined
Keywords: EXPORT, C-130

Details

Previous Info:
No news update for this record
Previously used record identifiers:
No related previous identifiers.
Access rules:
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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 A775. Data acquired by BADC for archiving during the EXPORT project.

Data Quality:
Unknown
File Format:
Data are NASA Ames 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 - C-130 - 2D-C instrument Deployed on: Met Office C-130 Hercules Aircraft
MRF: In Cloud Temperature probe Deployed on: Met Office C-130 Hercules Aircraft
MRF: Condensation Nucleus Counter Model 3025A Deployed on: Met Office C-130 Hercules Aircraft
MRF: Johnson-Williams Liquid Water Content Meter Deployed on: Met Office C-130 Hercules Aircraft
University of Leeds: GC-FID Deployed on: Met Office C-130 Hercules Aircraft
Leicester: Spectral Radiometer j(O1D) Deployed on: Met Office C-130 Hercules Aircraft
Met Office - Lyman-Alpha Hygrometer Deployed on: Met Office C-130 Hercules Aircraft
FAAM/BAE systems or other aircraft: Flight log Deployed on: Met Office C-130 Hercules Aircraft
FAAM/BAE systems or other aircraft: Flight summary Deployed on: Met Office C-130 Hercules Aircraft
MRF - C-130 - PAN gas chromatograph 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
Fast Forward Scattering Spectrometer Probe (PMS canister instrument) Deployed on: Met Office C-130 Hercules Aircraft
MRF - C-130 - Aethalometer - Particle Soot AbsorptionPhotometer (PSAP) 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
UEA: Formaldehyde (HCHO) instrument or Fluorometric Deployed on: Met Office C-130 Hercules Aircraft
UEA: PEroxy Radical Chemical Amplification (PERCA) technique Deployed on: Met Office C-130 Hercules Aircraft
UEA: Peroxides instrument Deployed on: Met Office C-130 Hercules Aircraft
MRF - C-130 - UV Absorption instrument Deployed on: Met Office C-130 Hercules Aircraft
MRF: Fluorescence water vapour sensor Deployed on: Met Office C-130 Hercules Aircraft
MRF - C-130 aircraft in-situ Instrumentation Deployed on: Met Office C-130 Hercules Aircraft

Mobile platform operations

Mobile Platform Operation 1 MRF Flight C-130 A775
Output Description None
  • long_name: Air Temperature
  • gcmd_name: Air Temperature
  • gcmd_url: http://vocab.ndg.nerc.ac.uk/term/P141/4/GVAR0027
  • names: Air Temperature, http://vocab.ndg.nerc.ac.uk/term/P141/4/GVAR0027
  • long_name: Carbon And Hydrocarbon Compounds
  • names: Carbon And Hydrocarbon Compounds
  • long_name: Carbon Monoxide
  • gcmd_name: Carbon Monoxide
  • gcmd_url: http://vocab.ndg.nerc.ac.uk/term/P141/4/GVAR0112
  • names: http://vocab.ndg.nerc.ac.uk/term/P141/4/GVAR0112, Carbon Monoxide
  • long_name: Deiced Temperature
  • gcmd_name: Deiced Temperature
  • gcmd_url: http://vocab.ndg.nerc.ac.uk/term/P141/4/GVAR0201
  • names: Deiced Temperature, http://vocab.ndg.nerc.ac.uk/term/P141/4/GVAR0201
  • gcmd_name: Dew Point Temperature
  • gcmd_url: http://vocab.ndg.nerc.ac.uk/term/P141/4/GVAR0210
  • long_name: Dew Point Temperature
  • names: Dew Point Temperature, http://vocab.ndg.nerc.ac.uk/term/P141/4/GVAR0210
  • gcmd_name: Geopotential Height
  • long_name: Geopotential Height
  • gcmd_url: http://vocab.ndg.nerc.ac.uk/term/P141/4/GVAR0341
  • names: Geopotential Height, http://vocab.ndg.nerc.ac.uk/term/P141/4/GVAR0341
  • long_name: Height From Radar Data
  • names: Height From Radar Data
  • long_name: Humidity
  • gcmd_name: EARTH SCIENCE > Atmosphere > Atmospheric Water Vapor > Humidity
  • gcmd_url: http://vocab.ndg.nerc.ac.uk/term/P041/4/G239
  • names: http://vocab.ndg.nerc.ac.uk/term/P041/4/G239, EARTH SCIENCE > Atmosphere > Atmospheric Water Vapor > Humidity
  • gcmd_url: http://vocab.ndg.nerc.ac.uk/term/P141/4/GVAR0391
  • long_name: Hydrostatic Pressure
  • gcmd_name: Hydrostatic Pressure
  • names: Hydrostatic Pressure, http://vocab.ndg.nerc.ac.uk/term/P141/4/GVAR0391
  • long_name: J(NO2)
  • alt_names: ['Reaction rate of NO2']
  • names: Reaction rate of NO2
  • long_name: J(O1D)
  • alt_names: ['Reaction rate of O1D']
  • names: Reaction rate of O1D
  • long_name: Methane
  • gcmd_name: EARTH SCIENCE > Atmosphere > Atmospheric Chemistry/Carbon and Hydrocarbon Compounds > Methane
  • gcmd_url: http://vocab.ndg.nerc.ac.uk/term/P041/4/G138
  • names: EARTH SCIENCE > Atmosphere > Atmospheric Chemistry/Carbon and Hydrocarbon Compounds > Methane, http://vocab.ndg.nerc.ac.uk/term/P041/4/G138
  • long_name: Non-methane Hydrocarbons
  • gcmd_name: Non-methane Hydrocarbons
  • gcmd_url: http://vocab.ndg.nerc.ac.uk/term/P141/4/GVAR0563
  • names: http://vocab.ndg.nerc.ac.uk/term/P141/4/GVAR0563, Non-methane Hydrocarbons
  • long_name: Oxygen Compounds
  • names: Oxygen Compounds
  • gcmd_name: EARTH SCIENCE > Atmosphere > Atmospheric Chemistry/Oxygen Compounds > Ozone
  • gcmd_url: http://vocab.ndg.nerc.ac.uk/term/P041/4/G164
  • long_name: Ozone
  • names: EARTH SCIENCE > Atmosphere > Atmospheric Chemistry/Oxygen Compounds > Ozone, http://vocab.ndg.nerc.ac.uk/term/P041/4/G164
  • long_name: Peroxide
  • names: Peroxide
  • long_name: Peroxy Radicals
  • names: Peroxy Radicals
  • long_name: Peroxyacetyl Nitrate (PAN)
  • names: Peroxyacetyl Nitrate (PAN)
  • long_name: Photolysis Rates
  • gcmd_name: Photolysis Rates
  • gcmd_url: http://vocab.ndg.nerc.ac.uk/term/P141/4/GVAR0625
  • names: Photolysis Rates, http://vocab.ndg.nerc.ac.uk/term/P141/4/GVAR0625
  • long_name: Trace Gases
  • names: Trace Gases
  • long_name: Trace Species
  • names: Trace Species
  • long_name: Volatile Organic Compounds
  • gcmd_name: Volatile Organic Compounds
  • gcmd_url: http://vocab.ndg.nerc.ac.uk/term/P141/4/GVAR0928
  • names: http://vocab.ndg.nerc.ac.uk/term/P141/4/GVAR0928, Volatile Organic Compounds

Co-ordinate Variables

Coverage
Temporal Range
Start time:
2000-08-09T07:47:53
End time:
2000-08-09T14:04:10
Geographic Extent

 
53.0000°
 
6.0000°
 
25.0000°
 
45.0000°