Quality assessment of sea level data by the TOGA Sea Level Center/National Oceanographic Data Center Joint Archive for Sea Level
33° 28.0' N
135° 47.0' E
135° E (GMT + 9 hr)
Japan Ocean. Data Center, Hydrographic Dept. Maritime Safety Agency, 3-1, Tsukiji, 5-Chome, Chuo-ku, Tokyo 104 Japan
Hourly, daily, and monthly values obtained by:
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
Simple average of all daily values; calculated if 7 or fewer days are missing
Span of Data:
01 January 1961 - 30 November 1968
Gaps > 1 Month:
GMT (hours 00-23)
Missing Data Flag:
All data are referred to tide gauge zero and linked to historic fixed bench marks.
The daily or monthly means do not reveal any obvious reference level shifts. Most questionable fluctuations are related to atmospheric or oceanographic events. Data spikes of about 10 cm or less have not been corrected.