Nitrogen isotope abundances in the recent solar wind
Article Abstract:
Two samples of lunar soil which have had simple and relatively recent exposures to solar wind were examined for 15-N/14-N ratios to determine the long-term changes in the isotopic composition of solar radiation, which is known to implant nitrogen on the lunar surface. The soil samples came from a collection made by the Apollo 16 mission. The results showed that 15-N/14-N ratios of nitrogen implanted on the lunar surface in the recent geological past are 40% higher than that in the terrestrial atmosphere.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 1995
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Removal of sulphur from the marine boundary layer by ozone oxidation in sea-salt aerosols
Article Abstract:
Much of the non-sea-salt sulphate in the marine boundary layer (MBL) comes from the oxidation of sulphur dioxide to sulphate by ozone. Mass transfer considerations show that this sulphate will be in the form of particles two to nine microns in diameter, which will quickly precipitate. This pathway for the removal of sulphur from the atmosphere, including that emitted by marine organisms, may mitigate the proposed positive feedback loop between global warming and sulphate haze.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 1992
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Sulphur emissions from ships
Article Abstract:
Capaldo and colleagues have pointed to an important sulphur source in the post-industrial ear, sulphur dioxide pollution from ships burning fossil fuels.Their global atmospheric sulphur model incorporates a new inventory of emissions and shows that attempts to fit earlier models to data could have been misleading.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 1999
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