1,042
Views
0
CrossRef citations to date
0
Altmetric
Articles

Ocean surface currents estimated from satellite remote sensing data based on a global hexagonal grid

, , , &
Pages 1073-1093 | Received 29 Sep 2022, Accepted 11 Mar 2023, Published online: 23 Mar 2023

Figures & data

Figure 1. Technical routine.

Figure 1. Technical routine.

Figure 2. Spherical hexagonal discrete global based on an icosahedron.

Figure 2. Spherical hexagonal discrete global based on an icosahedron.

Table 1. Resolution information of the hexagonal grid.

Figure 3. Schematic diagram of diffusing query adjacent neighbour.

Figure 3. Schematic diagram of diffusing query adjacent neighbour.

Figure 4. Orientation of local plane coordinate system for rectangular grid to the hexagonal discrete grid.

Figure 4. Orientation of local plane coordinate system for rectangular grid to the hexagonal discrete grid.

Table 2. Integrated ocean data.

Figure 5. Distribution of tidal gauge stations.

Figure 5. Distribution of tidal gauge stations.

Figure 6. The 9-year mean sea surface currents in the global oceans.

Figure 6. The 9-year mean sea surface currents in the global oceans.

Figure 7. Standard deviation in global surface currents, calculated from 2010 to 2019.

Figure 7. Standard deviation in global surface currents, calculated from 2010 to 2019.

Figure 8. The zonal profile of zonal mean U and longitudinal mean V.

Figure 8. The zonal profile of zonal mean U and longitudinal mean V.

Figure 9. U and V component error comparison.

Figure 9. U and V component error comparison.

Figure 10. Absolute Error comparison of U component based of two type of grids.

Figure 10. Absolute Error comparison of U component based of two type of grids.

Figure 11. Absolute Error comparison of V component based of two type of grids.

Figure 11. Absolute Error comparison of V component based of two type of grids.

Table 3. Percent of grid cells of each category.

Figure 12. RMSE of estimates from different level grids when compared to gauge stations.

Figure 12. RMSE of estimates from different level grids when compared to gauge stations.