= Solution
For $10^4$ such bergs per year, the rate of heat absorption north of the <Antarctic Convergence> is
$$
\dot Q=\frac{10^4(1.009575\times10^{17})}{365.25\times86400}\,\mathrm W,
\qquad\boxed{\dot Q\simeq3.20\times10^{13}\,\mathrm W.}
$$
Relative to the specified oceanic polar heat flux,
$$
\boxed{\frac{\dot Q}{2\times10^{15}\,\mathrm W}\simeq0.0160=1.60\%.}
$$
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>.
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