Composition of Bromine Aerosols Related to Ozone            Destruction in the Arctic
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One process for the destruction of ozone in the lower arctic                    troposphere appears to be the reaction between gaseous bromine and              ozone, producing filterable bromine aerosols whose abundance                    exceeds that expected from the sea salt in the atmosphere.                      Similar excess bromine aerosols is observed in the lower arctic                 stratosphere, implying that gaseous bromine may be responsible for              ozone destruction there as well.  In the Spring of 1989, the                    aircraft component of the Arctic Radiation and Chemistry                        Experiment collected particulate aerosol samples in profiles form               near the surface to the stratosphere.  These samples will be                    examined with a high resolution analytical electron microscope to               determine individual particle morphology and composition.  The                  system is able to provide quantitative analyses for elements from               Carbon to Uranium (atomic number range of 6 to 92).  Concurrently,              bulk aerosol samples will be collected and analyzed for elemental               composition using x-ray fluorescence techniques.  It will then be               possible to determine whether the excess bromine in the boundary                layer aerosol is of natural or anthropogenic origin, whether it                 reacts with ozone to produce a bromide aerosol, and whether the                 excess filterable bromine aerosol observed in the lower                         stratosphere may also be the product of a bromine gas-ozone                     destruction reaction.
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{'Code': '5280', 'Text': 'ANS-Arctic Natural Sciences'}
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