Relationship of the wind-wave from HY-2 scatterometer and radar altimeter data

Zengzhou Hao; Siqi Zhang; Fang Gong; Difeng Wang; Qiankun Zhu

doi:10.1117/12.2241414

19 October 2016 Relationship of the wind-wave from HY-2 scatterometer and radar altimeter data

Zengzhou Hao, Siqi Zhang, Fang Gong, Difeng Wang, Qiankun Zhu

Proceedings Volume 9999, Remote Sensing of the Ocean, Sea Ice, Coastal Waters, and Large Water Regions 2016; 999918 (2016) https://doi.org/10.1117/12.2241414
Event: SPIE Remote Sensing, 2016, Edinburgh, United Kingdom

Abstract

The significant wave height can be measured only on the track of satellite observation, while wind field can be obtained on the whole satellite scan-view region. In this paper, the wind speed retrieved from the HY-2 Scatterometer and significant wave height con-observed from the HY-2 radar altimeter are used to analyze the wind-wave relationship over the western north Pacific and China seas on July 2015. The significant wave height, which is measured from altimeter, is defined as the average height of the highest one-third waves in a wave spectrum, which is the mixture of swells and wind-waves. In order to deeply understand the wind-wave relationship, we use the criteria that is the total amount of energy contained in the wave field is less than or equal to the wave energy for a fully developed sea in terms of wind speed U₁₀. Some the wind speed and significant wave height data eliminated the effect of swell are selected to study the wind-wave relationship, a second-degree polynomial wind-wave relationship is presented. It reveals a nonlinear relationship with the standard error is 0.59m, and it has an approximate linear relationship above 10 m s^-1. Those make it possible to get the wind-generated wave information from the satellite-based wind fields. This relationship is coincident with the other two wind-wave models from in situ observations and significant wave height of wind-generated wave is also predicted from the HY2-SCAT wind speed based on this wind-wave model. However, it is still required to be validated by more observations for the wind-wave model, and it is possible to better or operationally apply for wave forecasting based on satellite-retrieved wind speed.

Citation Download Citation

Zengzhou Hao, Siqi Zhang, Fang Gong, Difeng Wang, and Qiankun Zhu "Relationship of the wind-wave from HY-2 scatterometer and radar altimeter data", Proc. SPIE 9999, Remote Sensing of the Ocean, Sea Ice, Coastal Waters, and Large Water Regions 2016, 999918 (19 October 2016); https://doi.org/10.1117/12.2241414

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KEYWORDS

Satellites

Radar

Wind energy

Microwave radiation

Wind measurement

Data modeling

Earth observing sensors

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