Reconstruction of sea level around the Korean Peninsula using cyclostationary empirical orthogonal functions
<p>Since the advent of the modern satellite altimeter era, the understanding of the sea level has increased dramatically. The satellite altimeter record, however, dates back only to the 1990s. The tide gauge record, on the other hand, extends through the 20th century but with poor spatial...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
Copernicus Publications
2018-09-01
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| Series: | Ocean Science |
| Online Access: | https://www.ocean-sci.net/14/959/2018/os-14-959-2018.pdf |
| Summary: | <p>Since the advent of the modern satellite altimeter era, the
understanding of the sea level has increased dramatically. The satellite
altimeter record, however, dates back only to the 1990s. The tide gauge
record, on the other hand, extends through the 20th century but with poor
spatial coverage when compared to the satellites. Many studies have been
conducted to create a dataset with the spatial coverage of the satellite
datasets and the temporal length of the tide gauge records by finding novel
ways to combine the satellite data and tide gauge data in what is known as
sea level reconstruction. However, most of the reconstructions of sea level
were conducted on a global scale, leading to reduced accuracy on regional
levels, especially when there are relatively few tide gauges. The seas around
the Korean Peninsula are one such area with few tide gauges before 1960. In
this study, new methods are proposed to reconstruct past sea level around the
Korean Peninsula. Using spatial patterns obtained from a cyclostationary
empirical orthogonal function decomposition of satellite data, we reconstruct
sea level over the period from 1900 to 2014. Sea surface temperature data and
altimeter data are used simultaneously in the reconstruction process, leading
to an elimination of reliance on tide gauge data. Although we did not use the
tide gauge data in the reconstruction process, the reconstructed sea level
has a better agreement with the tide gauge observations in the region than
previous studies that incorporated the tide gauge data. This study
demonstrates a reconstruction technique that can potentially be used at
regional levels, with particular emphasis on areas with poor tide gauge
coverage.</p> |
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| ISSN: | 1812-0784 1812-0792 |