The north-south tilt in the Australian Height Datum is explained by the ocean’s mean dynamic topography
Using geodetic and oceanographic data, we show that the apparent north-south slope between the Australian Height Datum (AHD) and the geoid is caused almost completely by the ocean’s time-mean dynamic topography (MDT). This is because the AHD was constrained to zero height at local mean sea level at...
| Main Authors: | , |
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| Format: | Journal Article |
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American Geophysical Union
2012
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| Online Access: | http://hdl.handle.net/20.500.11937/13616 |
| _version_ | 1848748393080291328 |
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| author | Featherstone, Will Filmer, Michael |
| author_facet | Featherstone, Will Filmer, Michael |
| author_sort | Featherstone, Will |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | Using geodetic and oceanographic data, we show that the apparent north-south slope between the Australian Height Datum (AHD) and the geoid is caused almost completely by the ocean’s time-mean dynamic topography (MDT). This is because the AHD was constrained to zero height at local mean sea level at multiple tide gauges around the Australian continent. Using MDT models and corrected leveling data, almost all of the apparent north-south slope can be removed from the AHD. An auxiliary observation is that a satellite-only MDT model based on only around one year of GOCE data generates results commensurate with geodetic, oceanographic and combined MDT models. |
| first_indexed | 2025-11-14T07:04:19Z |
| format | Journal Article |
| id | curtin-20.500.11937-13616 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T07:04:19Z |
| publishDate | 2012 |
| publisher | American Geophysical Union |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-136162017-09-13T15:54:08Z The north-south tilt in the Australian Height Datum is explained by the ocean’s mean dynamic topography Featherstone, Will Filmer, Michael Apparent sea level slope vertical geodetic datums geodetic leveling coastal mean dynamic topography mean sea level Australian Height Datum (AHD) Australia geoid Using geodetic and oceanographic data, we show that the apparent north-south slope between the Australian Height Datum (AHD) and the geoid is caused almost completely by the ocean’s time-mean dynamic topography (MDT). This is because the AHD was constrained to zero height at local mean sea level at multiple tide gauges around the Australian continent. Using MDT models and corrected leveling data, almost all of the apparent north-south slope can be removed from the AHD. An auxiliary observation is that a satellite-only MDT model based on only around one year of GOCE data generates results commensurate with geodetic, oceanographic and combined MDT models. 2012 Journal Article http://hdl.handle.net/20.500.11937/13616 10.1029/2012JC007974 American Geophysical Union fulltext |
| spellingShingle | Apparent sea level slope vertical geodetic datums geodetic leveling coastal mean dynamic topography mean sea level Australian Height Datum (AHD) Australia geoid Featherstone, Will Filmer, Michael The north-south tilt in the Australian Height Datum is explained by the ocean’s mean dynamic topography |
| title | The north-south tilt in the Australian Height Datum is explained by the ocean’s mean dynamic topography |
| title_full | The north-south tilt in the Australian Height Datum is explained by the ocean’s mean dynamic topography |
| title_fullStr | The north-south tilt in the Australian Height Datum is explained by the ocean’s mean dynamic topography |
| title_full_unstemmed | The north-south tilt in the Australian Height Datum is explained by the ocean’s mean dynamic topography |
| title_short | The north-south tilt in the Australian Height Datum is explained by the ocean’s mean dynamic topography |
| title_sort | north-south tilt in the australian height datum is explained by the ocean’s mean dynamic topography |
| topic | Apparent sea level slope vertical geodetic datums geodetic leveling coastal mean dynamic topography mean sea level Australian Height Datum (AHD) Australia geoid |
| url | http://hdl.handle.net/20.500.11937/13616 |