BGS Hosted Metadata
Southern Ocean Atmospheric Photochemistry Experiment 2 (SOAPEX-2): Atmospheric Constituents Concentration Measurements from Cape Grim, Tasmania
Southern Ocean Atmospheric Photochemistry Experiment 2 (SOAPEX-2) is primarily an experiment to study atmospheric cleansing by free radicals in extremely clean and slightly perturbed tropospheric air and focuses on a field campaign carried out at Cape Grim, Tasmania in January-February 1999. The dataset contains concentrations of atmospheric constituents such as halocarbons, hydrocarbons, methane, nitric oxide, and carbon monoxide. This dataset is public.
Oxidation of almost all trace gases released into the atmosphere is initiated by hydroxyl (OH) radicals, produced mainly from the action of near-UV light on ozone in the presence of water vapour. Increasing evidence suggests that the oxidative capacity of the troposphere has been perturbed in recent years due to the emission of gases such as methane, carbon monoxide, non-methane hydrocarbons and nitrogen oxides from man-made sources. These perturbations may be causing changes in the natural atmospheric composition, for instance increasing tropospheric levels of the greenhouse gas ozone, which has important consequences for climate and human health. It is also possible that the rates of oxidation of gases such as methane, and production of sulphate aerosols from the oxidation of sulphur dioxide, have been modified. Taken together a change in the oxidative capacity of the atmosphere has many consequences for the long-term stability of the Earth's climate.
SOAPEX-2 builds upon the success of the original SOAPEX-I experiment conducted at Cape Grim in January/February 1995 which resulted in the publication of several papers to the literature on the relationship between concentrations of peroxy radicals and uv light levels in different NOx concentration regimes, and the consequences for ozone production and loss in the marine boundary layer. SOAPEX-2 is a more complete experiment with the addition of atmospheric measurements of key new species including hydroxyl, hydroperoxyl, halogen oxide and nitrate radicals, non methane hydrocarbons, speciated aldehydes, PAN and halocarbons.
SOAPEX-2 involves four groups of tropospheric scientists from the UK and Australia, namely the Universities of East Anglia, Leeds and Leicester along with CSIRO (Commonwealth Scientific Research Organisation), Melbourne.
The clean air photochemistry experiment is an essential prerequisite for experiments carried out in more polluted atmospheres. The data obtained is allowing rigorous testing of basic mechanisms which describe the behaviour of free radical concentrations at differing light levels, water vapour and nitrogen oxide concentrations, etc. The measurements performed in this project are expected to yield valuable information on chemical changes that are affecting the oxidative capacity of the global troposphere and, therefore, the rate at which the global atmosphere can cleanse itself of pollutants. The measurements are also highly relevant to the situation in more polluted atmospheres, where increased levels of confidence in our understanding of atmospheric chemistry is an essential prerequisite to any legislation designed to reduce regional and global pollution.
The specific objectives of SOAPEX-2 are:
* To quantitatively test fast photochemical theory in clean air.
* To examine perturbations from the baseline situation in polluted continental air containing more complex mixtures of free radical sources and sinks
* Investigation of the balance between tropospheric O3 production and destruction in differing NOx regimes
* A test of instrumental performance
* Testing of models used to simulate chemical processes in the lower atmosphere which are deficient in their description of boundary layer processes
Simple
- Date (Publication)
- 1987-12-10T02:20:33
- Date (Creation)
- 1987-12-10T02:20:33
- Citation identifier
- https://catalogue.ceda.ac.uk/uuid/a266f328ead407624dde4bb5c9e2e6a2
- Citation identifier
- NCAS British Atmospheric Data Centre (NCAS BADC) / a266f328ead407624dde4bb5c9e2e6a2
- Point of contact
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Organisation name Individual name Electronic mail address Role Unavailable
Allan, Beverly
Unavailable
Author Unavailable
Ayers, G.
Unavailable
Author Unavailable
Baker, Jon
Unavailable
Author Unavailable
Brough, N.
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Author Unavailable
Carpenter, Lucy Jane
Unavailable
Author Unavailable
Creasey, David J.
Unavailable
Author Unavailable
Fraser, P.
Unavailable
Author Unavailable
Galbally, Ian
Unavailable
Author Unavailable
Gillett, R.
Unavailable
Author Unavailable
Heard, Dwayne E.
Unavailable
Author Unavailable
Kivlighon, Loretta
Unavailable
Author Unavailable
Kochhar, M.
Unavailable
Author Unavailable
Krummel, P.
Unavailable
Author Unavailable
Lee, James D.
Unavailable
Author Unavailable
Lewis, Alastair C.
Unavailable
Author Unavailable
Meyer, M.
Unavailable
Author Unavailable
Mills, Graham
Unavailable
Author Unavailable
Monks, Paul S.
Unavailable
Author Unavailable
Pilling, Michael J.
Unavailable
Author Unavailable
Salisbury, Gavin
Unavailable
Author Unavailable
Steele, P.
Unavailable
Author Unavailable
Sturrock, Georgina
Unavailable
Author Unavailable
Weeks, Ian
Unavailable
Author NCAS British Atmospheric Data Centre (NCAS BADC)
Custodian NCAS British Atmospheric Data Centre (NCAS BADC)
Distributor NCAS British Atmospheric Data Centre (NCAS BADC)
pointofContact NCAS British Atmospheric Data Centre (NCAS BADC)
Publisher
- Maintenance and update frequency
- Unknown
- Update scope
- Series
- Keywords
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SOAPEX-2
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air pollution
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in-situ
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airborne
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ship
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balloon
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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
- Please contact the data centre for assistance on accessing data from this dataset collection.
- Use constraints
- Other restrictions
- Spatial representation type
- Grid
- Language
- English
- Topic category
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- Climatology, meteorology, atmosphere
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- Begin date
- 1999-01-01T00:00:00
- End date
- 1999-02-28T00:00:00
- Unique resource identifier
- WGS 84
- Distribution format
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Name Version Contact data centre for format details.
- 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/a266f328ead407624dde4bb5c9e2e6a2 CEDA Data Catalogue Page
- OnLine resource
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Protocol Linkage Name https://artefacts.ceda.ac.uk/badc_datadocs/soapex/tables.html Methodology and Approach
- OnLine resource
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Protocol Linkage Name https://artefacts.ceda.ac.uk/badc_datadocs/soapex/imgs/ BADC Doc: SOAPEX Photo Gallery
- OnLine resource
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Protocol Linkage Name https://artefacts.ceda.ac.uk/badc_datadocs/soapex/soapex_a.pdf Taking the air CSIRO Publication on SOAPEX
- Hierarchy level
- Series
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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Please see data lineage statements for each dataset within this collection for data lineage details.
Metadata
- File identifier
- a266f328ead407624dde4bb5c9e2e6a2 XML
- Metadata language
- English
- Character set
- UTF8
- Hierarchy level
- Series
- Hierarchy level name
-
series
- Date stamp
- 2026-01-12T03:27:07
- 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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