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Official Journal of the Asia Oceania Geosciences Society (AOGS)

Fig. 5 | Geoscience Letters

Fig. 5

From: Benefits of radar-derived surface current assimilation for South of Africa ocean circulation

Fig. 5

Maps of differences of FREE and 4DVAR geostrophic velocities RMSE (against altimeter derived velocities) during April 2020. a corresponds to the 1\(^{st}\) to 10\(^{th}\) of April, b corresponds to the 11\(^{th}\) to the 20\(^{th}\) of April and c corresponds to the 21\(^{th}\) to the 30\(^{th}\) of April. Blue color means RMSE reduction in 4DVAR solution. Dotted contour shows where HF radar data are assimilated

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