PDS_VERSION_ID        = PDS3                                                  
                                                                              
^PDF_DOCUMENT         = "FEDOROVA_ET_AL_2021.PDF"                             
PRODUCT_ID            = FEDOROVA_ET_AL_2021                                   
RELEASE_ID            = 0001                                                  
REVISION_ID           = 0000                                                  
RECORD_TYPE           = FIXED_LENGTH                                          
DATA_SET_ID           = "MEX-M-SPI-4-IRDDR-PROF-V1.0"                         
PRODUCT_CREATION_TIME = 2019-09-05T14:12:58                                   
                                                                              
OBJECT                = PDF_DOCUMENT                                          
DOCUMENT_NAME         = "MULTI-ANNUAL MONITORING OF THE WATER VAPOR VERTICAL  
                        DISTRIBUTION ON MARS BY SPICAM ON MARS EXPRESS"       
PUBLICATION_DATE      = 2020-12-11                                            
DOCUMENT_TOPIC_TYPE   = "DATA SET DESCRIPTION"                                
INTERCHANGE_FORMAT    = BINARY                                                
DOCUMENT_FORMAT       = "ADOBE PDF"                                           
DESCRIPTION           = "The distribution of water vapor with altitude has    
long remained a missing piece of the observational data set of water vapor on 
Mars. In this study, we present the first multi-annual survey of water vapor  
profile covering the altitude range from 0 to 100 km based on the SPICAM/Mars 
Express occultation measurements. During the aphelion season, water remains   
confined below 40-60 km for all Martian years observed. The highest altitude  
where water vapor can be spotted is between 70 and 90 km during the southern  
summer (Ls = 240-300; perihelion season), approaching the transition between  
the middle and upper atmosphere. In this season, years without a global dust  
storm (GDS) show a significant moistening of the upper atmosphere (100 ppmv)  
in the southern hemisphere, confirming a seasonal impact on the hydrogen      
escape rate. The two observed GDS, in MY28 and MY34, show a substantial       
disparity in water vapor response. The storm in MY28, which coincides with    
the southern summer solstice, creates the largest excess of water in both     
hemispheres at >80 km. This climatology of water vapor will supply a robust   
statistical basis to address the long-term escape processes of water from     
Mars."                                                                        
END_OBJECT            = PDF_DOCUMENT                                          
END