def flux_components_bottom(self):
N = self.lev.size<EOL>atmComponents = np.zeros_like(self.Tatm)<EOL>flux_down_top = np.zeros_like(self.Ts)<EOL>for n in range(N):<EOL><INDENT>emission = np.zeros_like(self.emission)<EOL>emission[..., n] = self.emission[..., n]<EOL>this_flux_down = self.trans.flux_down(flux_down_top, emission)<EOL>atmComponents[..., n] = this_flux_down[..., <NUM_LIT:0>]<EOL><DEDENT>return atmComponents<EOL>
Compute the contributions to the downwelling flux to surface due to
        emissions from each level.