Quality Assessment of sea level data by the TOGA Sea Level Center/National Oceanographic Data Centre Joint Archive for Sea Level.
Station
Christmas
Latitude
10° 25.0' S
Country
Australia
Longitude
105° 40.0' E
JASL #
170A
Time Meridian
105E (GMT + 7 hr)
GLOSS #
047
TOGA #
I049
NODC #
31100501
Contributor:
CSIRO Division of Oceanography GPO Box 1538 Hobart, Tasmania 7001
Originator:
Same
Original Data:
Digital
Instrument Type:
Leupold Stevens analog-to-digital recorder
Digitzd Interval:
6 minute
Present Data:
Hourly, daily, and monthly values obtained by:
Hourly:
Three-point Hanning centred on the hour
Daily:
119-point convolution filter (Bloomfield, 1976) centred 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:
28 September 1986 - 09 October 1987
Gaps > 1 Month:
13 March - 18 April 1987; 10 June - 25 July 1987
Time Reference:
GMT (hours 00-23)
Space-filler Flag:
-9999
Units:
Millimeters
Missing Data Flag:
99999
Reference Level:
All heights have been referred to the station tide staff zero which is linked to fixed bench marks.
Comment:
The daily and monthly means reveal no apparent reference level changes or trends. However, comparisons with Cocos Island suggest a reference level shift of about +10 cm for July - October, 1987.
