Not exact matches
It
assumes a scale separation between a barotropic background flow and a
small amplitude wave and predicts a change of k with the flow so that wave activity is conserved.
Regarding your example of water in a tub, you in fact
assume that
amplitude of waves is much
smaller than the overall water level, so you have a
small parameter here, and some sort of perturbation method might be used to derive a reasonable model for the averaged level in the tub.
from RC: A single line in the IPCC AR4 report (p466) which correctly stated that «Wahl and Ammann (2006) also show that the impact [of the McIntyre and McKitirck critique] on the
amplitude of the final reconstruction [by MBH98] was
small (~ 0.05 C)» is that
assuming that MM05 was a recontruction, rather than an attempt to replicate MBH99??