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INVESTIGATION OF LARGE SCALE AND REGIONAL FEATURES OF WAVE HEIGHTS FROM ALTIMETER MEASUREMENTS

P. Queffeulou, D. Croize-Fillon

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Abstract

Significant wave height (SWH) data from six altimeter missions are analyzed to investigate the large scale and regional features of wave height over a fifteen year period. First, the long time series of TOPEX-Jason measurements over the same ground track network are used to construct seasonal maps of long term mean value and standard deviation of SWH. These maps reveal SWH features associated for instance with meteorological characteristics as in the Trade Winds, or with wave current interactions as in Gulf Stream and Agulhas currents. Second, the possibility of constructing virtual buoy measurements using multi-altimeter mission data is investigated. The goal being to estimate monthly SWH characteristic time series in any oceanic location, particularly where very few in situ measurements are available or where wave model outputs are not always reliable. 1.

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What this paper is about

Significant wave height (SWH) data from six altimeter missions are analyzed to investigate the large scale and regional features of wave height over a fifteen year period. First, the long time series of TOPEX-Jason measurements over the same ground track network are used to construct seasonal maps of long term mean value and standard deviation of SWH. These maps reveal SWH features associated for instance with meteorological characteristics as in the Trade Winds, or with wave current interactions as in Gulf Stream and Agulhas currents. Second, the possibility of constructing virtual buoy measurements using multi-altimeter mission data is investigated. The goal being to estimate monthly SWH characteristic time series in any oceanic location, particularly where very few in situ measurements are available or where wave model outputs are not always reliable. 1.

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Available abstract

Significant wave height (SWH) data from six altimeter missions are analyzed to investigate the large scale and regional features of wave height over a fifteen year period. First, the long time series of TOPEX-Jason measurements over the same ground track network are used to construct seasonal maps of long term mean value and standard deviation of SWH. These maps reveal SWH features associated for instance with meteorological characteristics as in the Trade Winds, or with wave current interactions as in Gulf Stream and Agulhas currents. Second, the possibility of constructing virtual buoy measurements using multi-altimeter mission data is investigated. The goal being to estimate monthly SWH characteristic time series in any oceanic location, particularly where very few in situ measurements are available or where wave model outputs are not always reliable. 1.

Key concepts: Altimeter, Buoy, Significant wave height, Wave height, Scale (ratio), Standard deviation, Remote sensing, Geology

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INVESTIGATION OF LARGE SCALE AND REGIONAL FEATURES OF WAVE HEIGHTS FROM ALTIMETER MEASUREMENTS — Research Paper | ScholarLens