Vertical land motion as a key to understanding sea level change and variability
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No Canadian affiliation. An affiliation-only frame — the usual design — would never have seen this work. It is one of the works that make the case for inverting the frame.
Machine scores (provisional)
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- Teacher spread
- 0.032 · how far apart the two teachers sit on this one work
- Validation status
score_only:v0-immature-baseline· verbatim from the scoring run: score_only means the number may rank works, and no category label ships from it
Abstract
Abstract Vertical land motions are a key element in understanding how sea levels have changed over the past century and how future sea levels may impact coastal areas. Ideally, to be useful in long‐term sea level studies, vertical land motion should be determined with standard errors that are 1 order of magnitude lower than the contemporary climate signals of 1 to 3 mm/yr observed on average in sea level records, either using tide gauges or satellites. This metrological requirement constitutes a challenge in geodesy. Here we review the most successful instrumental methods that have been used to determine vertical displacements at the Earth's surface, so that the objectives of understanding and anticipating sea levels can be addressed adequately in terms of accuracy. In this respect, the required level of uncertainty is examined in two case studies (global and local). A special focus is given to the use of the Global Positioning System (GPS) and to the combination of satellite radar altimetry with tide gauge data. We update previous data analyses and assess the quality of global satellite altimetry products available to the users for coastal applications. Despite recent advances, a near‐plateau level of accuracy has been reached. The major limitation is the realization of the terrestrial reference frame, whose physical parameters, the origin and the scale factor, are beyond the scope of a unique technique such as the GPS. Additional practical but nonetheless important issues are associated with the installation of GPS antennas, such as ensuring that there is no unknown differential vertical motion with the tide gauge.
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The record
- Venue
- Reviews of Geophysics
- Topic
- Geophysics and Gravity Measurements
- Field
- Earth and Planetary Sciences
- Canadian institutions
- —
- Funders
- Natural Environment Research CouncilCommonwealth Scientific and Industrial Research OrganisationGoddard Space Flight CenterEuropean Centre for Medium-Range Weather ForecastsMinisterio de Ciencia e InnovaciónSight Research UKEuropean Space AgencyUniversity of TorontoUnited Nations Educational, Scientific and Cultural Organization
- Keywords
- Tide gaugeGlobal Positioning SystemEarth observationAltimeterGeodesySea levelRemote sensingSatelliteScale (ratio)MeteorologyGeologyEnvironmental scienceComputer scienceGeographyOceanographyCartographyTelecommunications
- Has abstract in OpenAlex
- yes