| Tittel: | Dynamisk havtopografi fra Sentinel-3 og vannstandsmålere langs norskekysten : Dynamic ocean topography from Sentinel-3 and tide gauges along the Norwegian coast | | Ansvar: | Kristian Breili | | Forfatter: | Breili, Kristian  | | Materialtype: | Artikkel - elektronisk | | Signatur: | Kart og plan | | Utgitt: | Bergen : Universitetsforlaget, 2021 | | Omfang: | S. 37-54 | | ISBN/ISSN: | 0447-3278 | | Serie: | Kart og plan ; 1-2/2020 | | Innhold: | Abstract
Dynamic ocean topography (DT) is the height of the sea surface above the geoid. We have calculated DT from Sentinel-3 altimetry satellites and tide gauges along the Norwegian coast and in the deep and narrow Sognefjord. Compared to coastal tide gauges, Sentinel-3 shows standard deviation of 6.9 cm, spatial correlation of 0.63, and temporal correlation of 0.93. These results are encouraging and indicate that Sentinel-3 may supplement tide-gauge observations for mapping DT in the outer coastal zone. In the Sognefjord, DT from Sentinel-3 is less accurate, i.e. the standard deviation was 10.4 cm, the spatial correlation 0.29, and the temporal correlations between 0.37 and 0.90. Land-contaminated radar pulses are the most likely cause of the lower accuracy of Sentinel-3 in the Sognefjord.
Keywords: Ocean topography, tide gauges, satellite altimetry, Sentinel-3
Innledning
Dynamisk havtopografi er definert som havoverflatas høyde over geoiden. | | Del av verk: | Kart og plan 1-2/2021 |
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