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Sensitivity of Altimeter Wave Height Assessment to Data Selection

Graham D. Quartly, Andrey A. Kurekin
2020 Remote Sensing  
This paper addresses the issue of how the selection of buoys and the calculation of altimeter averages affect the metrics characterising the errors of altimetric wave height estimates.  ...  The use of a 51-point median reduces the sensitivity to occasional outliers, but the quality of this measure can be improved by demanding that there is a minimum number of valid measurements.  ...  In Section 2, we start with a brief reprise of the buoy and altimeter data being used, and then in Section 3 highlight some of the issues affecting data quality; Section 3.1 shows the sensitivity to the  ... 
doi:10.3390/rs12162608 fatcat:jk43hmuiizfrlg3zzuaa3yassy

Assessment of wind-forcing impact on a global wind-wave model using the TOPEX altimeter

Hui Feng, Doug Vandemark, Yves Quilfen, Bertrand Chapron, Brian Beckley
2006 Ocean Engineering  
The study presents assessment of an operational wave model (Wavewatch III), focusing upon the model sensitivity to wind-forcing products.  ...  wind-forced model runs, as well as to demonstrate an extended use of the altimeter beyond simply supplying wave height for wave model validation and assimilation.  ...  Acknowledgements The authors wish to recognize the help of Paul Wittmann from the Fleet Numerical Meteorology and Oceanography Center during the Wavewatch III model implementation.  ... 
doi:10.1016/j.oceaneng.2005.10.015 fatcat:fuamwgyucbcnnbfwnla4xl7jvq

Wind Waves in the Arctic Seas: Envisat and AltiKa Data Analysis

Pavel A. Golubkin, Bertrand Chapron, Vladimir N. Kudryavtsev
2014 Marine Geodesy  
Wind-generated waves in the Kara, Laptev, and East-Siberian Seas are investigated using altimeter data from Envisat RA-2 and SARAL-AltiKa. Only isolated ice-free zones had been selected for analysis.  ...  Altimeter data, both significant wave height (SWH) and wind speed, for these areas were further obtained for the period 2002-2012 using Envisat RA-2 measurements, and for 2013 using SARAL-AltiKa.  ...  provided data.  ... 
doi:10.1080/01490419.2014.990592 fatcat:rjbmc2aysvb5naj2zc7wpgkapa

Wave energy resource assessment with AltiKa satellite altimetry: A case study at a wave energy site

Lonneke Goddijn-Murphy, Belén Martín Míguez, Jason McIlvenny, Philippe Gleizon
2015 Geophysical Research Letters  
The deep water approximation was applied to our 60 m deep site along with a simple empirical model to estimate wave period, T, from altimeter significant wave height, H s , and backscattering coefficient  ...  We used data from the AltiKa altimeter on board the SARAL satellite because of its superior performance near the coast.  ...  The wave measurement data in Farr Bay, UK, are available from the authors upon request (lonneke.goddijn-murphy@uhi.ac.uk).  ... 
doi:10.1002/2015gl064490 fatcat:4ppmrucfnzfd7e3oddbo3npo44

Global Estimates of Extreme Wind Speed and Wave Height

J. Vinoth, I. R. Young
2011 Journal of Climate  
A long-term dataset of satellite altimeter measurements of significant wave height and wind speed, spanning 23 years, is analyzed to determine extreme values corresponding to a 100-yr return period.  ...  The results show that the altimeter database can estimate 100-yr return period significant wave height to within 5% of buoy measurements and the 100-yr wind speed to within 10% of buoy measurements when  ...  The support of the ARC and our industry partner RPS MetOcean is gratefully acknowledged.  ... 
doi:10.1175/2010jcli3680.1 fatcat:mv5hkcxk4bhhnnwr7sugmb2mpm

A suitable metocean hindcast database for the design of Marine energy converters

Edwige Boudière, Christophe Maisondieu, Fabrice Ardhuin, Mickaël Accensi, Lucia Pineau-Guillou, Jérémy Lepesqueur
2013 International Journal of Marine Energy  
As a support to its research activities related to the development of marine renewable energies, Ifremer is building a specific hindcast data set for the assessment of sea-states climatologies.  ...  The main features of this database, built running an up-to-date configuration of the WaveWatch III ® wave model on an unstructured grid extending from the South of the North Sea to the Bay of Biscay are  ...  However some underestimations for both the higher wind speeds and wave heights are noticeable, which appears to be a characteristic of the CFSR winds. 2) altimeter data CERSAT database of wave and wind  ... 
doi:10.1016/j.ijome.2013.11.010 fatcat:uovjopsqlbennmmj6yo66lwxpe

Comparison of gridded multi-mission and along-track mono-mission satellite altimetry wave heights with in situ near-shore buoy data

P.R. Shanas, V. Sanil Kumar, N.K. Hithin
2014 Ocean Engineering  
The applicability of altimeter data for the coastal region is examined by comparing the gridded multimission and along-track mono-mission significant wave height (SWH) data with the in-situ buoy measurements  ...  Applying a correction factor of 0.75, 0.70 and 0.69 to the altimeter data for stations 1, 2 and 4, respectively, resulted in close agreement with the buoy data (correlation coefficient ~ 0.9-0.96).  ...  Acknowledgements The measurements at Honnavar are a component of the Supra Institutional Project funded by the  ... 
doi:10.1016/j.oceaneng.2014.03.014 fatcat:x6cbzmaa65f27mevbne7syqyj4

Effect of Long Waves on Ku-Band Ocean Radar Backscatter at Low Incidence Angles Using TRMM and Altimeter Data

Ngan Tran, B. Chapron, D. Vandemark
2007 IEEE Geoscience and Remote Sensing Letters  
This letter uses a large ocean satellite data set to 5 document relationships between Ku-band radar backscatter (σ 0 ) 6 of the sea surface, near-surface wind speed (U ), and ocean wave 7 height (SWH).  ...  At these nodes, we obtain 11 TRMM clear-air normalized radar cross-section data along with 12 coincident altimeter-derived significant wave height.  ...  The 427 authors would also like to thank two anonymous reviewers 428 whose comments helped improve the clarity of the document. 429  ... 
doi:10.1109/lgrs.2007.896329 fatcat:2o4nrsawtzdanl4a43eqwph5qq

On the Use of NCEP–NCAR Reanalysis Surface Marine Wind Fields for a Long-Term North Atlantic Wave Hindcast

Val R. Swail, Andrew T. Cox
2000 Journal of Atmospheric and Oceanic Technology  
Storm peak wave heights in extratropical storms were systematically underestimated at higher sea states due to underestimation of peak wind speeds in major jet streak features propagating about intense  ...  The surface 10-m wind field was found to be the most skillful and was selected for further analysis.  ...  Support for this project was provided by the Canadian Federal Program of Energy Research and Development. The authors wish to express their sincere gratitude to Dr. Vincent J.  ... 
doi:10.1175/1520-0426(2000)017<0532:otuonn>2.0.co;2 fatcat:shuoshcjrjgi3oysfahq73fjaq

Operational Forecasting of Wind-Generated Waves by Hurricane Isabel at NCEP*

Hendrik L. Tolman, Jose-Henrique G. M. Alves, Yung Y. Chao
2005 Weather and forecasting  
The accuracy of the operational wave models at the National Centers for Environmental Prediction (NCEP) for sea states generated by Hurricane Isabel is assessed.  ...  Although major model deficiencies can be attributed to shortcomings in the driving wind fields, several areas of potential wave model improvement have been identified. * Marine Modeling and Analysis Branch  ...  to these data.  ... 
doi:10.1175/waf852.1 fatcat:wgsjkwbkrveurnm55fyvmi7ofm

An assessment of wind forcing impact on a spectral wave model for the Indian Ocean

P G Remya, Raj Kumar, Sujit Basu
2014 Proceedings of the Indian Academy of Sciences, Earth and Planetary Sciences  
The wave model results have been compared with in-situ observations and satellite altimeter data.  ...  The focus of the present study is the assessment of the impact of wind forcing on the spectral wave model MIKE 21 SW in the Indian Ocean region.  ...  The authors wish to thank Delft Institute for Earth Oriented Space Research Radar Altimeter Database system (http://rads. tudelft.nl/rads/rads.shtml) for providing radar altimeter data.  ... 
doi:10.1007/s12040-014-0450-z fatcat:g7mvqqgaxjbjbisd6rgk7xfg4a

Global Wind Speed and Wave Height Extremes Derived from Long-Duration Satellite Records

Alicia Takbash, Ian R. Young, Øyvind Breivik
2019 Journal of Climate  
When applied to altimeter data for wind speed and significant wave height, this analysis produces values consistent with buoy validation data and previous numerical model reanalysis datasets.  ...  The application of extreme-value analysis to long-duration (30 year) global altimeter and radiometer datasets is considered.  ...  The raw datasets used in the study were supplied by Globwave (altimeter and buoy) and Remote Sensing Systems (RSS; radiometer/scatterometer).  ... 
doi:10.1175/jcli-d-18-0520.1 fatcat:d64rfmmpsne5llcmleu2fmxuiq

Investigation of trends in extreme value wave height and wind speed

I. R. Young, J. Vinoth, S. Zieger, A. V. Babanin
2012 Journal of Geophysical Research  
1] Global altimeter data spanning a period of more than 20 years is analyzed to determine whether there are measurable trends in extreme value return period estimates of wind speed and wave height.  ...  The data is subdivided into sections of 4 years duration and extreme value analysis applied to each section.  ...  Analysis of the global altimeter data set for wave height and wind speed to determine trends is presented 1 in section 5 together with validation studies.  ... 
doi:10.1029/2011jc007753 fatcat:jf7exahofnfz3f2yynnv64ljya

Detection of Tsunamis from Changes in Ocean Surface Roughness [chapter]

Benjamin D., Oleg A., Vladimir G., Robert R.
2011 The Tsunami Threat - Research and Technology  
Lognonn Summary and conclusions Satellite altimeters provide the chance to study the effects of a tsunami wave in the open ocean through concurrent measurements of the sea surface height and the radar  ...  Tsunami waves hit coastal towns in Chile with substantial wave heights.  ...  This book offers extensive and new information on tsunamis; their origin, history, effects, monitoring, hazards assessment and proposed handling with respect to precaution.  ... 
doi:10.5772/13979 fatcat:66tksk7revfnxjphkzpoep7bp4

An Overview of Requirements, Procedures and Current Advances in the Calibration/Validation of Radar Altimeters

Graham D. Quartly, Ge Chen, Francesco Nencioli, Rosemary Morrow, Nicolas Picot
2021 Remote Sensing  
Analysis of the radar echoes from a spaceborne altimeter gives information on sea surface height, wave height and wind speed, as well as other parameters over land and ice.  ...  This editorial provides a brief guide to the approaches and issues for cal/val of the various different derived parameters, including a synopsis of the papers in this special issue.  ...  Conflicts of Interest: The authors declare no conflict of interest.  ... 
doi:10.3390/rs13010125 fatcat:oxalyomb25frnavurtc7iuduyu
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