Climate Change Research Scientist, Author, Former NASA Scientist
NOTE: I ve made a couple of updates/clarifications below based upon comments on this post. Lake Mead behind Hoover Dam is now within several feet of the lowest level at which turbine power generation must be greatly curtailed. Recent news articles often blame the cause on a millennium drought being experienced in the West. Of course, [ ]
The Version 6.1 global average lower tropospheric temperature (LT) anomaly for July, 2026 was +0.48 deg. C departure from the 1991-2020 mean, which is statistically unchanged from the June, 2026 value of +0.46 deg. C. The Version 6.1 global area-averaged linear temperature trend (January 1979 through July 2026) remains at +0.16 deg/ C/decade (+0.22 C/decade [ ]
The Version 6.1 global average lower tropospheric temperature (LT) anomaly for June, 2026 was +0.46 deg. C departure from the 1991-2020 mean, which is down from the May, 2026 value of +0.53 deg. C. The Version 6.1 global area-averaged linear temperature trend (January 1979 through June 2026) remains at +0.16 deg/ C/decade (+0.22 C/decade over [ ]
This month I m adding Australia to the Global, USA48, and Canada time series plots. The Version 6.1 global average lower tropospheric temperature (LT) anomaly for May, 2026 was +0.53 deg. C departure from the 1991-2020 mean, which is up from the April, 2026 value of +0.39 deg. C.. The Version 6.1 global area-averaged linear temperature [ ]
There was a recent weeks-long exchange of emails between many climate people professional and amateur regarding the idea that air pressure (in combination with absorbed solar energy) is what causes temperature. There were insults launched at those who refused to believe what a certain physics-trained person says should be a revolution in our [ ]
This month I m adding plots for USA48 and Canada, too. The Version 6.1 global average lower tropospheric temperature (LT) anomaly for April, 2026 was +0.39 deg. C departure from the 1991-2020 mean, which remains statistically unchanged for 4 months now. The Version 6.1 global area-averaged linear temperature trend (January 1979 through April 2026) remains at [ ]
I ve been spending recent months applying our novel methodology of quantifying the urban heat island (UHI) effect on surface air temperature, now using Landsat-based Impervious Surface (IS) cover fraction as a proxy for urbanization. This is an adaptation of our published research using population density (PD) as a proxy for urbanization, in which we showed [ ]
March 2026 was record-warm for the Lower 48. The Version 6.1 global average lower tropospheric temperature (LT) anomaly for March, 2026 was +0.38 deg. C departure from the 1991-2020 mean, statistically unchanged from the February, 2026 value of +0.39 deg. C. The Version 6.1 global area-averaged linear temperature trend (January 1979 through March 2026) remains [ ]
I m told by John Christy that there has been considerable discussion amongst the state climatologists about March temperatures in the U.S. setting a new record. If true, the media will no doubt lecture us on how this is evidence for global warming. (Why do we never hear about cool months being evidence against global warming?) [ ]
The Version 6.1 global average lower tropospheric temperature (LT) anomaly for February, 2026 was +0.39 deg. C departure from the 1991-2020 mean, up a little from the January, 2026 value of +0.35 deg. C. The Version 6.1 global area-averaged linear temperature trend (January 1979 through February 2026) remains at +0.16 deg/ C/decade (+0.22 C/decade over [ ]