QUALITY ASSESSMENT OF SEA LEVEL DATA                
                                           by the                               
                   UH SEA LEVEL CENTER/NATIONAL OCEANOGRAPHIC DATA CENTER     
                                 JOINT ARCHIVE FOR SEA LEVEL                    
                                       updated: 14 Jul 2000
              Station  : Chichijima                Latitude:  27 06.0N          
              Country  : Japan                    Longitude: 142 11.0E          
              JASL #   : 047A                 Time Meridian: 135E (GMT + 9 hr)  
              GLOSS #  : 103      TOGA #: P013       NODC #: 12147201           
              Contributor  : Japan Meteorological Agency
                             1-3-4 Otemachi, Chiyoda-ku                    
                             Tokyo, Japan                                  
              Originator   : Japan Meteorological Agency
              Original Data: analog                                             
              Instrmnt Type: LFT-4                                              
              Digitzd Intvl: hourly                                             
              Present Data : Hourly, daily, and monthly values obtained by:     
                    Hourly : hourly spot reading                                
                    Daily  : 119-point convolution filter (Bloomfield, 1976)    
                             centered on noon applied to the hourly data        
                             with respective periods of the 95, 50, and 5%      
                             amplitude points at 124.0, 60.2, and 40.2 hours    
                    Monthly: Simple average of all daily values; calculated if  
                             7 or fewer days are missing                        
              Span of data : 31 Mar 1975 - 30 Apr 2000
              Gaps > 1 mon : none                                               
              Time Refernce: GMT (hours 00-23)   Space-filler Flag   :-9999     
              Units        : millimeters         Missing Data Flag   : 9999     
              Existing     : Yes                 Operational         : Yes      
              Sat. Trans.  : No                  Distribution        : 1975-2000
              Refernce Levl: All data are referred to a historic fixed          
                             bench mark                                         
              Comment      : The daily or monthly means do not reveal           
                             any obvious reference level shifts.  Most          
                             questionable fluctuations are related to           
                             natural events.                                    
                                                                                
                    CI MISSING              REPLACED GAPS     QUESTIONABLE      
              YEAR (%) DATA                 OR BAD DATA       FLUCTUATIONS      
              ---- --- -------------------- --------------- --------------------
              1975  75 none                 (14)198-(22)198 none                
              1976  99 180-181              none            181-182,297-298     
              1977  99 266-267              (20)096-(06)097 none                
                                            (13)152-(23)152                     
                                            (07)154-(14)154                     
              1978 100 none                 (06)322-(12)322 none                
              1979  94 47-69                none            none                
              1980 100 none                 none            none                
              1981 100 none                 (12)198-(03)199 none                
                                            (11)230-(22)230                     
                                            (14)312-(21)312                     
              1982 100 none                 (17)130-(14)131 none                
                                            (19)204-(13)205                     
              1983 100 none                 (14)027-(22)027 none                
                                            (03)028-(10)028                     
                                            (12)057-(22)057                     
                                            (03)058-(10)058                     
              1984 100 none                 (12)212-(18)212 303-304             
                                            (11)237-(18)237                     
                                            (17)284-(23)284                     
              1985 100 none                 (03)354-(15)354 none                
              1986  99 267-268              (09)267-(02)268 271                 
              1987  99 257-259              (00)001-(19)001 none                
              1988 100 none                 (00)033-(23)033 none            
              1989 100 none                 (11)044-(22)044 none
                                            (11)131-(23)131 none
                                            (12)331-(23)331
              1990  99 58-59,365            none            none
              1991 100 none                 none            none
              1992 100 none                 none            none
              1993 100 none                 none            none
              1994 100 none                 none            none
              1995 100 none                 none            none
              1996 100 none                 none            none
              1997 100 none                 none            none
              1998 100 none                 none            none
              1999 100 none                 none            none
              2000  33 none                 none            none