Evaluation of tidal error in altimetry data in the Asian marginal seas |
| |
| Authors: | Akihiko Morimoto |
| |
| Institution: | 1.Hydrospheric Atmospheric Research Center,Nagoya University,Furo-cho, Chikusa-ku, Nagoya,Japan |
| |
| Abstract: | The magnitude and geographical distribution of the error in the Archiving, Validation and Interpretation of Satellite Oceanographic
data (AVISO) altimetry data associated with tidal correction around Asian marginal seas has been revealed. The errors were
evaluated by harmonic analysis of the AVISO corrected sea surface heights data (CorSSH). Errors of more than 15 cm of tidal
correction were recognized in the western and northern parts of the Yellow Sea, Celebes Sea, Kuril Islands, and the northwestern
part of the Okhotsk Sea. It was found that the CorSSH and sea level anomaly (SLA) data downloaded from the AVISO are not available
for direct use in those marginal seas. To reduce the tidal correction error, the harmonic constants calculated from the latest
tide model and regional tide model were applied as the tidal correction of the Altimetry data. The tidal errors in the Yellow
Sea and the northwestern part of the Okhotsk Sea were reduced by approximately 20 cm and 10 cm, respectively. Root mean square
differences between the harmonic constants derived from tide models and those derived from altimetry data were calculated.
The root mean square differences were large in the Yellow and the Okhotsk Seas. Root sum squares for four principal tidal
constituents in the Yellow and East China Seas and Okhotsk Sea were 7.72 cm and 8.36 cm, respectively. |
| |
| Keywords: | |
| 本文献已被 SpringerLink 等数据库收录！ |
|
