GLOBAL OBSERVATIONS OF STRATOSPHERIC HEAVY OZONE ISOTOPOLOGUE ENRICHMENTWITH THE ODIN SUB-MILLIMETRE RADIOMETER

摘要

The Odin Sub-Millimetre Radiometer (SMR) measuresrnthermal emission lines of several minor ozone isotopologuesrnsuch as symmetric and asymmetric O_3-18 andrnasymmetric O_3-17 at the atmospheric limb. The globalrndata set spans over 11 years starting in late 2001. Thernbasic characteristics and limitations of the observationalrndata are presented and the global distribution of heavyrnozone isotopologue enrichment as seen by Odin isrndescribed and discussed. Best results in terms of spatialrncoverage are obtained for asymmetric O_3-18, whichrnshows a characteristic increase of the enrichment in thernmiddle to upper stratosphere and the smallest enrichmentrnin the polar lower stratosphere. Symmetric O_3-18 isrncharacterised by a layer of maximum enrichment in thernmiddle stratosphere.