MARS
 		  
GEOLOGIC  LUNAR  RESEARCHES 
 
 
 
 
METEOROLOGY
1995-1997 Opposition
Limb brightenings, or limb arcs were reported throughout the last apparitions. Blue Clouds were recorded principally on Nix Olimpica, Hellas, Aeria, Elysium, Arcadia, Electris Ausonia. 
No dust storm were recorded. Hellas and Argyre showed also the presence of mixed clouds (dust and vapour). 
 
 
Fig 1- dark circles correspond to clouds (topographic and orographic) 
 
Fig 2- Statistic analysis of clouds (1995-1997 oppositions) 


 
Regression of north polar cap in year 1997. Vertical axis (latitude) , orizontal axis (LS) 
 

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