For such bergs per year, the rate of heat absorption north of the Antarctic Convergence is
Relative to the specified oceanic polar heat flux,
The bergs themselves move equatorward carrying a thermal deficit; their melting removes heat from warmer water. This is equivalent to poleward heat transport by equatorward iceberg drift, explaining the sign of the inferred poleward contribution. The estimate includes the sensible and latent terms from part (b), and does not include the separate effects of released freshwater on density stratification or ocean circulation.