ALL-RUSSIA OPEN ANNUAL CONFERENCES ON
CURRENT PROBLEMS IN REMOTE SENSING OF THE EARTH FROM SPACE
Principal physics, methods and techniques for monitoring the environment, potentially dangerous phenomena and objects
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Proceedings of the 16th Conference (November 12-16, 2018, Moscow, Russia)
Application of the Triple Collocation Method to Evaluate Accuracy
of Altimeter, Buoy and Modeled Height of Wind Waves
Fedor A. Pogarskiy1, Vladislav G. Polnikov1, Arseniy A. Kubryakov2
- Obukhov Institute of Atmospheric Physics, Russian Academy of Sciences, Moscow, Russia
pogarskiy@ifaran.ru, polnikov@mail.ru
- Marine Hydrophysical Institute, Russian Academy of Sciences, Sebastopol, Russia
arskubr@yandex.ru
DOI 10.21046/rorse2018.150
For independent and simultaneous assessment accuracy for the altimeter and buoys measurement data and the numerical simulation of the wind-wave heights, the triple collocation (TC) method described in paper [1] was applied. We used data from 6 missions of satellites, 74 buoys, reanalysis of ERA5 and the results of simulations using the numerical WaveWatch and WAM models in the northern parts of the Atlantic and Pacific Oceans. The stability of the TC method for estimating the root-mean-square errors (RMS) for wave heights is shown. It has been established that the reanalysis has the highest accuracy, the buoy data and simulation results are much lower, and the satellite data do even less. The reasons for the established accuracy distribution are analyzed.
Keywords: wind waves, buoy measurements, satellite measurements, numerical simulation, triple collocation, standard deviation
References: - [1] Janssen P. A. E. M., Abdalla S, Hersbach H, and Bidlot J.-R. Error Estimation of Buoy, Satellite, and
- Model Wave Height Data, J. Atmosph. Oceanic Thechnol. 2007, V. 24(9), pp. 1665–1677. DOI:
- 10.1175/JTECH2069.1
- [2] http://globwave.ifremer.fr/
- [3] https://www.ndbc.noaa.gov/
- [4] Copernicus Climate Change Service (C3S) (2017): ERA5: Fifth generation of ECMWF atmospheric
- reanalyzes of the global climate. Copernicus Climate Change Service Climate Data Store (CDS).
- https://cds.climate.copernicus.eu/cdsapp#!/home
- [5] ftp://polar.ncep.noaa.gov/pub/history/waves/
- [6] Samiksha, S. V., Polnikov V., Pogarskii F., et al. Verification of model wave heights with long-term
- moored buoy data: application to wave field over the Indian Ocean, Ocean Engineering, 2015,V. 104,
- pp. 469-479. http://dx.doi.org/10.1016/j.oceaneng.2015.05.020.
- [7] Polnikov V.G., Pogarskiy F. A., Zilitinkevich N. S., Kubryakov A.A. Using the Along-Track
- Altimeter Data for a Verification of the Numerical Wave Models, Issledovanie Zemli iz Kosmosa, 2018,
- No. 4, pp. 21-318 (in Russian). DOI:10.31857/S020596140002353-9.
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Section 3. Evaluation of accuracy and verification of the algorithms for remote sensing data processing
150-154