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2. Global distribution


The following maps show the frequency of occurrence of ISSRs on two pressure levels, 147 hPa, and 215 hPa, projected onto world maps. The humidity data to obtain these figures stem from the Microwave Limb Sounder (MLS). The evaluation procedure and more details can be found in Spichtinger et al. (2003, QJ paper).
 
 

ISSRs on 147 hPa

Figure 1: Frequency of occurrence of icesupersaturated regions on the 147 hPa level.

ISSRs on 147 hPa, seasonally

Figure 2: Seasonal frequencies of occurrence of ice supersaturated regions on the 147 hPa level.
 
 

ISSRs on 215 hPa

Figure 3: Frequency of occurrence of icesupersaturated regions on the 215 hPa level.
 
 

ISSRs on 215 hPa, seasonally

Figure 4: Seasonal frequencies of occurrence of ice supersaturated regions on the 215 hPa level.

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