For years global warming skeptics have pounced on a long standing disagreement between satellite temperature measurements of the lower atmosphere and ground measurements. Satellite measurements have, in the past, failed to show any atmospheric warming while measurements on the ground, obviously, have. See this page
for an articulation of the case against global warming by the ubiquitous Fred Singer (satellite measurements relate to #2).
in the NYTimes from Tuesday highlights a new study that brings the lower atmospheric measurements more in line with the ground. The authors of the study argue that we've been underestimating temperature increases from satellite measurements mostly because of poor data processing techniques.
This is really important work.