San Juan (Puerto Rico) Site History
History Summary
| Station | San Juan, Puerto Rico |
|---|---|
| Latitude | 18° 28.0' N |
| Longitude | 066° 07.0' W |
| Country | USA |
| GLOSS No | 206 |
| Time Reference | GMT (00-23 hours) |
| Contributor | (1985-1990) TOGA Sea Level Center
(1991-2000) NOAA/NOS, USA |
| Instrument Type | (1985-1990) Float and stilling well gauge, Analog- to-Digital Recorder
(1991-2000) Next Generation Water Level Measurement System, acoustic sensor |
| Site of Gauge | |
| Observational Periods | 1962-1974, 1978-2000 (data available for 1985-2000) |
Tide Gauge Benchmark (TGBM) Description
NOS tidal benchmark survey disk stamped '5371 A 1977' set in the top of a concrete sea wall at the U.S. Coastguard compound.
Auxiliary Benchmarks
| Benchmark | Year |
|---|---|
| 5371 B | 1977 |
| 5371 C | 1977 |
| 5371 D | 1977 |
| 5371 E | 1977 |
| 5371 F | 1977 |
| 5371 G | 1977 |
| NO 13 | 1962 |
| NO 14 | 1962 |
| 1968 |
Benchmark Relationships
All heights have been referred to the station Tide Gauge Zero which is linked to fixed bench marks.
| Benchmark | Description |
|---|---|
| TGBM | 5.32 feet above mean lower low water (1960-1978 epoch) |
| TGBM | 4.54 feet above mean sea level (1960-1978 epoch) |
| TGBM | 3.99 feet above mean high water (1960-1978 epoch) |
Quality Assessment
Comments
The daily and monthly values do not show any obvious shifts or trends and agree well with Magueyes Island in SW Puerto Rico.
The monthly plot reveals a consistent annual signal.
The sharp peak on 18 September 1989 is due to Hurricane Hugo.
The data for 1994-2000 were supplied with heights relative to MLLW. Consequently 975mm was added to refer the data to tide gauge zero.
The data for 1999-2000 were supplied in non-GMT format and had to be shifted into GMT.
| Year | CI (%) | QI (%) | Missing Data | Replaced Gaps
or Bad Data |
Questionable
Fluctuations |
|---|---|---|---|---|---|
| 1985 | 99 | 99 | None | None | None |
| 1986 | 100 | 100 | None | None | None |
| 1987 | 97 | 97 | 124-135 | None | None |
| 1988 | 52 | 52 | 152-249,286-366 | None | None |
| 1989 | 78 | 78 | 1-65,240-256 | None | 66-70 |
| 1990 | 100 | 100 | None | None | None |
| 1991 | 99 | 91 | 35-40 | None | None |
| 1992 | 100 | 100 | None | None | None |
| 1993 | 100 | 100 | None | None | None |
| 1994 | 100 | 100 | None | None | None |
| 1995 | 100 | 100 | None | None | None |
| 1996 | 100 | 100 | None | None | None |
| 1997 | 100 | 100 | None | None | None |
| 1998 | 100 | 99 | None | None | 264-265 |
| 1999 | 92 | 92 | 153,154,156-170 | 213-228 | (13)156 44,104-107,213 |
| 2000 | 100 | 100 | None | None | 130-135,180-190,240-245 |
