FIGURE 3. Radiative cooling rates in the northern and southern hemispheres.
From the following article:
An equatorial oscillation in Saturn's middle atmosphere
T. Fouchet, S. Guerlet, D. F. Strobel, A. A. Simon-Miller, B. Bézard & F. M. Flasar
Nature 453, 200-202(8 May 2008)
doi:10.1038/nature06912
The radiative cooling rates were calculated at 30° N (black) and 30° S (red) between 2 and 0.003 hPa, by differentiating the net thermal flux integrated over the v4-band of methane, the v9-band of ethane and the v5-band of acetylene. The hydrocarbon abundance was set to the retrieved value presented in Fig. 2.