Firn Record of Trace Gases Relevant to Atmospheric Chemical Change over 100 yrs (FIRETRACC/100)
This data was collected as a result of the FIRETRACC/100 (Firn Record of Trace Gases Relevant to Atmospheric Chemical Change over 100 yrs) project conducted in 1998 and 1999. The FIRETRACC project aimed to determine the history of numerous trace gases of both human (pollution) and natural origin over the 20th century in the global atmosphere. This was achieved by pumping old air out of deep unconsolidated snow (known as firn) that accumulates to depths of around 50 to 100 m on the polar ice caps of both hemispheres. The resulting firn air samples from the Arctic and Antarctic were returned to Europe and the US for multiple gas and isotope analysis in a number of research laboratories. The firn air samples were analysed for well over eighty separate trace gases (halocarbons, non-methane hydrocarbons, alkyl nitrates, sulphur species, etc.), and thirteen different isotopic measurements of CO2, CH4, CO and permanent gases (O2, N2, Ar, Kr).
In summary, the objectives of FIRETRACC/100 are as follows:
* To determine the global trends of trace gases relevant to troposphericchemistry over the 20th century. These will include CO, the isotopiccomposition of CO, hydrocarbons, alkyl nitrates, numerous OH-reactivehalocarbons (such as methyl chloride, methyl chloroform, methyl bromide,hydrochlofluorocarbons, etc.), and sulphur gases (COS, CS2, etc.). Trends of longer lived gases will also be determined for dating purposes (CO2, CFCs,SF6, perfluorocarbons, etc.)
* Determine the evolution of inter-hemispheric ratios of OH-sensitive species to constrain modelled global OH fields
* Examine ratios of parent hydrocarbons to alkyl nitrates to place constraints on NOX fields in models
* Elucidate the sources of CO from isotopic studies and use to deconvolute CO/methane coupling in models
* Reconstruct the history of ozone, OH and tropospheric oxidising capacity over the past 100 years using full chemistry 2-D models
* Determine the influence of 20th century industrialisation on the gas phase composition and chemistry of the lower atmosphere
The data consists of ‘primary’ data comprising simple concentration versus depth profiles, and for selected gases also ‘secondary’ data comprising reconstructed historical trends. The firn diffusion model, used in the model reconstruction, is also available through this site.
Default
Identification info
- Metadata Language
- English (en)
- Dataset Reference Date ()
- 2006-12-10T03:03:33
- Dataset Reference Date ()
- 2006-12-10T03:03:33
- Identifier
- NCAS British Atmospheric Data Centre (NCAS BADC) / 41a6e20ba98c4913ea6893e2fcb5aec5
- Maintenance and update frequency
- unknown
- Update scope
- series
- Keywords
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- FIRETRACC
- Chemistry
- Aerosols
- GEMET - INSPIRE themes, version 1.0 ()
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- atmospheric conditions
- Limitations on Public Access
- otherRestrictions
- Other constraints
- Please contact the data centre for assistance on accessing data from this dataset collection.
- Use constraints
- otherRestrictions
- Other constraints
- Usage limitations for the data within this collection is set at the individual dataset level. Please refer to the licence details of each underlying dataset.
- Spatial representation type
- grid
- Topic category
-
- Climatology, meteorology, atmosphere
- Begin date
- 1998-03-31T23:00:00
- End date
- 1998-04-29T23:00:00
- Code
- WGS 84
Distribution Information
- Data format
-
-
Contact data centre for format details.
()
-
Contact data centre for format details.
()
- Resource Locator
-
CEDA Data Catalogue Page
Detail and access information for the resource
- Resource Locator
-
The European Commission Environment and Climate Programme (4th Framework) website
No further details.
- Resource Locator
-
Carbon Dioxide Information Analysis Center
No further details.
- Resource Locator
-
British Antarctic Survey
No further details.
- Resource Locator
-
Climate and Environmental Physics, University of Bern
No further details.
- Resource Locator
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National Snow and Ice Data Centre
No further details.
- Resource Locator
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BADC Doc: FIRETRACC Help file
No further details.
- Resource Locator
-
BADC Doc: FIRETRACC List of References
No further details.
- Resource Locator
-
CEDA Data Catalogue Page
Detail and access information for the resource
- Resource Locator
-
The European Commission Environment and Climate Programme (4th Framework) website
No further details.
- Resource Locator
-
Carbon Dioxide Information Analysis Center
No further details.
- Resource Locator
-
British Antarctic Survey
No further details.
- Resource Locator
-
Climate and Environmental Physics, University of Bern
No further details.
- Resource Locator
-
National Snow and Ice Data Centre
No further details.
- Resource Locator
-
BADC Doc: FIRETRACC Help file
No further details.
- Resource Locator
-
BADC Doc: FIRETRACC List of References
No further details.
- Quality Scope
- series
Report
- Dataset Reference Date ()
- 2010-12-08
- Statement
- Please see data lineage statements for each dataset within this collection for data lineage details.
Metadata
- File identifier
- 41a6e20ba98c4913ea6893e2fcb5aec5 XML
- Metadata Language
- English (en)
- Character set
- 8-bit variable size UCS Transfer Format, based on ISO/IEC 10646
- Resource type
- series
- Hierarchy level name
- series
- Metadata Date
- 2024-03-29T01:06:39
- Metadata standard name
- UK GEMINI
- Metadata standard version
- 2.3