- Title
- Validation of sea levels from coastal altimetry waveform retracking expert system: a case study around the Prince William Sound in Alaska
- Creator
- Idris, N. H.; Deng, X.
- Relation
- 2017 International Conference on Space Science and Communication. 2017 International Conference on Space Science and Communication "Space Science for Sustainability" [presented in Journal of Physics: Conference Series, Vol. 852, No. 012029] (Kuala Lumpur, Malaysia 3-5 May, 2017)
- Publisher Link
- http://dx.doi.org/10.1088/1742-6596/852/1/012029
- Publisher
- Institute of Physics Publishing
- Resource Type
- conference paper
- Date
- 2017
- Description
- This paper presents the validation of Coastal Altimetry Waveform Retracking Expert System (CAWRES), a novel method to optimize the Jason satellite altimetric sea levels from multiple retracking solutions. The validation is conducted over the region of Prince William Sound in Alaska, USA, where altimetric waveforms are perturbed by emerged land and sea states. Validation is performed in twofold. First, comparison with existing retrackers (i.e. MLE4 and Ice) from the Sensor Geophysical Data Records (SGDR), and second, comparison with in-situ tide gauge data. From the first validation assessment, in general, CAWRES outperforms the MLE4 and Ice retrackers. In 4 out of 6 cases, the value of improvement percentage (standard deviation of difference) is higher (lower) than those of the SGDR retrackers. CAWRES also presents the best performance in producing valid observations, and has the lowest noise when compared to the SGDR retrackers. From the second assessment with tide gauge, CAWRES retracked sea level anomalies (SLAs) are consistent with those of the tide gauge. The accuracy of CAWRES retracked SLAs is slightly better than those of the MLE4. However, the performance of Ice retracker is better than those of CAWRES and MLE4, suggesting the empirical-based retracker is more effective. The results demonstrate that the CAWRES would have potential to be applied to coastal regions elsewhere.
- Subject
- sea levels; Coastal Altimetry Waveform Retracking Expert System (CAWRES); Prince William Sound, Alaska; altimetric waveforms; retrackers
- Identifier
- http://hdl.handle.net/1959.13/1397220
- Identifier
- uon:34215
- Identifier
- ISSN:1742-6596
- Rights
- © 2017. Content from this work may be used under the terms of the Creative Commons Attribution 3.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.
- Language
- eng
- Full Text
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