Details of Award
NERC Reference : NER/A/S/2001/01064
Global marine sources of reactive halogen species.
Grant Award
- Principal Investigator:
- Professor LJ Carpenter, University of York, Chemistry
- Co-Investigator:
- Professor MW Gallagher, The University of Manchester, Earth Atmospheric and Env Sciences
- Grant held at:
- University of York, Chemistry
- Science Area:
- Marine
- Atmospheric
- Overall Classification:
- Atmospheric
- ENRIs:
- Global Change
- Biodiversity
- Science Topics:
- Tropospheric Processes
- Ocean - Atmosphere Interact.
- Climate & Climate Change
- Abstract:
- It is now established that catalytic cycles involving reactive halogen species (RHS) such as IO and BrO are responsible for tropospheric ozone depletion events in polar and coastal areas. Recent evidence suggests that tropospheric RHS may be more widespread: IO has been detected in air masses with little or no coastal influence and recent balloon and satellite data indicate a free tropospheric background of BrO of about 1-2 pptv. The formation of RHS is initiated by photolysis of marine organo-halogens and also, in the case of bromine, by autocatalytic release from sea-salt aerosol. Open ocean production of reactive organo-halogens is however very uncertain, particularly for the iodine compounds, and their contribution to BrO formation is not known. The difficulty with assessing the global role of such oceanic compounds is that their production tends to be 'patchy' and their atmospheric concentrations very small. This means that wide data coverage and highly sensitive instrumentation are required in order to produce accurate emission estimates. This project aims to provide a comprehensive database of atmospheric and marine concentrations and sea-to-air fluxes of a range of reactive organo-halogens measured by automated GC-MS, in collaboration with DOAS measurements of RHS including IO, OIO, BrO and CIO and other supporting measurements including aerosol surface area. With the data provided, we aim to estimate the relative contributions of organo-halogen photolysis and aerosol recycling to reactive bromine production. Data coverage will span coastal and open ocean regions from the Canadian coast to the Antarctic Ocean.
- NERC Reference:
- NER/A/S/2001/01064
- Grant Stage:
- Completed
- Scheme:
- Standard Grants Pre FEC
- Grant Status:
- Closed
- Programme:
- Standard Grant
This grant award has a total value of £74,828
FDAB - Financial Details (Award breakdown by headings)
| Total - T&S | Total - Staff | Total - Other Costs | Total - Indirect Costs |
|---|---|---|---|
| £23,148 | £11,310 | £24,424 | £15,946 |
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