Data and observations

by Judith Curry
So, was 2014 the ‘warmest year’?  Drum roll . . .

by Judith Curry
The buzz is intensifying about 2014 possibly being the warmest year globally in the historical temperature record.

by Carol Anne Clayson
A significant area of uncertainty in climate science and one of the biggest limitations on our ability to predict the timing, location and impacts of climate change is our limited understanding of ocean processes and their interactions with the atmosphere, land, and ice systems.

by Judith Curry
UPDATE:  comments on McKitrick’s paper
With 39 explanations and counting, and some climate scientists now arguing that it might last yet another decade, the IPCC has sidelined itself in irrelevance until it has something serious to say about the pause and has reflected on whether its alarmism is justified, given its reliance on computer models that predicted temperature rises that have not occurred. – Rupert Darwall 

by Judith Curry
Direct determination of changes in oceanic heat content over the last 20 years are not in conflict with estimates of the radiative forcing, but the uncertainties remain too large to rationalize e.g., the apparent “pause” in warming. – Wunsch and Heimbach

For context, see these two previous posts at Climate Etc.:

by Zeke Hausfather
There has been much discussion of temperature adjustment of late in both climate blogs and in the media, but not much background on what specific adjustments are being made, why they are being made, and what effects they have. Adjustments have a big effect on temperature trends in the U.S., and a modest effect on global land trends. The large contribution of adjustments to century-scale U.S. temperature trends lends itself to an unfortunate narrative that “government bureaucrats are cooking the books”.

Our algorithm is working as designed. – NOAA NCDC

by Judith Curry
Skeptics doing what skeptics do best . . . attack skeptics. – Suyts

by Judith Curry Given the new information now available from the Southern Hemisphere, climate scientists must consider a larger role for natural climate variability in contributing to global temperature changes over the past millennium. – Kim Cobb A paper recently … Continue reading →

by Judith Curry At the Conference for World Affairs, in Boulder Colorado. This past week, I’ve been participating in the Conference on World Affairs. The panels I participated on are listed [here]. Today Kevin Trenberth and I participated in a panel entitled Climate … Continue reading →