A new paper just published in Geophysical Research Letters
by Roger Davies and Mathew Molloy of the University of Auckland finds
that over the past decade the global average effective cloud height has
declined and that “If sustained, such a decrease would indicate a
significant measure of negative cloud feedback to global warming.”Davies and Molloy are quick to point out that part of the decline from 2000 to 2010 in cloud height is due to the timing and variability of El Niño/La Niña events over the same period, however, there still seems to be evidence that at least part of the decline may remain even when El Niño/La Niña variability is accounted for.


