Analysis of a stratospheric temperature anomaly using ATOVS information
Poulsen, C.A.
In February/March of 2000 a temperature anomaly in the Northern Hemisphere was observed in the monitoring of ATOVS data. Investigations into the cause of the anomaly found that it seemed to correlate with the eruption of Mt. Hekla in Iceland on February 26th. Further investigations showed the cause of the temperature anomaly was most likely due to the polar vortex shifting into a region of light causing the chlorine molecules built up over winter to photo-?dissociate into the active chlorine that causes ozone destruction. This report is also an example of how anomalies observed in the ATOVS data assimilation can be investigated using some of the tools available at the UK Met. Office and elsewhere.
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