Ammassalik (Greenland) Site History
History Summary
| Station Name | Ammassalik, Greenland |
|---|---|
| Latitude | 65° 30.0' N |
| Longitude | 037° 00.0' W |
| Country | Denmark |
| GLOSS No. | 228 |
| Time Reference | GMT (00-23 hours) |
| Contributor | 1990-1999 Royal Danish Administration of Navigation & Hydrography |
| Instrument Type | Pressure gauge |
| Site of Gauge | |
| Observational Periods | 1973, 1990 - 1999 |
| Reference Level | All data are referred to LAT which is Chart Datum for Greenland. |
Tide Gauge Benchmark (TGBM) Description
TGBM 5298.6cm below 'bronze' mark near Ammassalik town-cairn.
Also benchmark 4321.1cm below 'bronze' mark about 10m from church entrance.
Quality Assessment
Comments
All data are corrected for atmospheric pressure. Salinity not measured, sea level elevation calculated from pressure using a sea water density based on measured temperature and a salinity of 31.5 ppt.
All pre-1995 data have been adjusted by -119cm to refer to LAT.
The data contain significant energy of one to three day periods related to atmospheric and oceanographic events.
1996 data have been collected with a 15 minutes interval, but it slips 1 minute approximately every month.
In 1997, possible datum shift over day Nos. 215 to 225.
In 1998, from day Nos. 233-365, there are non-uniform timing errors and possible instrument problems.
Most of 1999 suffers from timing errors, perhaps due to instrument problems.
| Year | Completeness
Index (%) |
Questionable Fluctuations (In day Nos.)
and Missing Data (Gaps >6 hours) |
|---|---|---|
| 1990 | 99 | None
Gap from 1990/12/19 at 17.00 to 1990/12/23 at 13.00 |
| 1991 | 56 | None
Gap from 1991/01/17 at 21.00 to 1991/02/09 at 18.00 Gap from 1991/06/29 at 04.00 to 1991/07/01 at 17.00 Gap from 1991/08/05 at 01.00 to 1991/08/09 at 14.00 Gap from 1991/08/14 at 12.00 to 1991/11/12 at 20.00 Gap from 1991/11/13 at 21.00 to 1991/11/17 at 04.00 Gap from 1991/11/22 at 10.00 to 1991/12/02 at 11.00 Gap from 1991/12/09 at 18.00 to 1991/12/17 at 18.00 |
| 1992 | 81 | None
Gap from 1992/02/02 at 11.00 to 1992/02/02 at 22.00 Gap from 1992/04/05 at 13.00 to 1992/04/05 at 20.00 Gap from 1992/04/22 at 13.00 to 1992/05/01 at 12.00 Gap from 1992/05/27 at 17.00 to 1992/06/05 at 19.00 Gap from 1992/06/11 at 21.00 to 1992/07/06 at 13.00 Gap from 1992/07/16 at 22.00 to 1992/07/19 at 13.00 Gap from 1992/08/08 at 15.00 to 1992/08/10 at 17.00 Gap from 1992/08/18 at 21.00 to 1992/08/30 at 14.00 Gap from 1992/09/07 at 14.00 to 1992/09/10 at 17.00 Gap from 1992/09/17 at 07.00 to 1992/09/18 at 17.00 Gap from 1992/12/19 at 22.00 to 1992/12/22 at 18.00 |
| 1993 | 69 | None
Gap from 1993/01/07 at 04.00 to 1993/01/07 at 18.00 Gap from 1993/01/16 at 01.00 to 1993/01/21 at 14.00 Gap from 1993/03/14 at 04.00 to 1993/03/21 at 15.00 Gap from 1993/04/09 at 16.00 to 1993/05/09 at 14.00 Gap from 1993/05/09 at 16.00 to 1993/05/25 at 14.00 Gap from 1993/05/29 at 05.00 to 1993/06/03 at 16.00 Gap from 1993/06/16 at 20.00 to 1993/06/23 at 16.00 Gap from 1993/07/04 at 13.00 to 1993/07/10 at 14.00 Gap from 1993/07/19 at 05.00 to 1993/07/25 at 15.00 Gap from 1993/08/05 at 05.00 to 1993/08/06 at 10.00 Gap from 1993/08/08 at 13.00 to 1993/09/06 at 14.00 |
| 1994 | 99 | None
Gap from 1994/08/16 at 15.00 to 1994/08/17 at 20.00 |
| 1995 | 100 | None |
| 1996 | 100 | None |
| 1997 | 96 | 030 and 070
Gap from 1997/01/29 at 09.48 to 1997/01/29 at 18.48 Gap from 1997/02/02 at 01.18 to 1997/02/02 at 13.03 Gap from 1997/02/17 at 17.48 to 1997/02/19 at 18.03 Gap from 1997/04/12 at 09.48 to 1997/04/12 at 16.33 Gap from 1997/05/16 at 06.33 to 1997/05/25 at 12.33 |
| 1998 | 78 | 155, 156, 168, 233-365
Gap from 1998/02/26 at 13.15 to 1998/05/16 at 10.15 |
| 1999 | 65 | 001-105,147-237
Gap from 1999/08/25 at 11.24 to 1999/12/31 at 23.54 |
