6. Figure 9.27 shows the trajectory of a \"champion\" surface drifter, which mad

Question

6. Figure 9.27 shows the trajectory of a "champion" surface drifter, which made one and a hal Antarctica between March, 1995, and March, 2000 (courtesy of Nikolai Maximenko). Red dots mark the position of the float at 30 day interval. (a) Compute the mean speed of the drifter over the 5 years. (b) Assuming that the mean zonal current at the bottom of the ocean is zero, use the thermal wind relation (neglecting salinity effects) to compute the depth-averaged temperature gradient across the Antarctic Circumpolar Current.

Explanation / Answer

the distance for one loop around Antarctica the drifter is located is approximately is 22 x 103 km. So mean speed of the drifter over 5 years is 0.407 nm/hr The temperature gradient is 18.84 0 C / nm

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