Climate change could revive medieval megadroughts in US Southwest

Study picks apart factors that caused severe, long-lasting droughts and suggests increased risk for future Earth Institute at Columbia University About a dozen megadroughts struck the American Southwest during the…

Geothermal ocean warming discussion thread

Reposted from Climate Etc. Posted on July 21, 2019 by curryja by Judith Curry “The atmosphere bias of climate science makes it impossible for them to see geological forces and…

Remystifying Climate Feedback

By Joe Born 1. Introduction By presenting actual calculation results from a specific feedback-system example, the plots below will put some graphical meat on the verbal bones of Nick Stokes’…

Why Caution Is Needed With Those Hail Pictures in Mexico

From Forbes A dose of common sense from Marshall Shepherd As I browsed the social media, I saw claims of climate change, “end of times” language, and sheer awe that…

Bitcoin causing CO2 emissions comparable to Hamburg

Hardware and IP addresses analyzed to assess the carbon footprint of the cryptocurrency Technical University of Munich (TUM) The use of Bitcoin causes around 22 megatons in CO2 emissions annually…

Half of 21st Century Warming Due to El Nino

Reposted from Dr Roy Spencer’s Blog May 13th, 2019 by Roy W. Spencer, Ph. D. A major uncertainty in figuring out how much of recent warming has been human-caused is…

SEA LEVEL: Rise and Fall – Part 4 – Getting a Rise Out of Nothing

Guest Essay by Kip Hansen (with help from Steve Case)   Prologue:  I have been writing recently about Sea Level Rise, both as particular local examples (  Guam,  Canton,  Miami,…

Tales of the Adjustocene: Satellite Sea Level Edition

Guest post by David Middleton When the observations don’t match the models, adjust the observations… Satellite snafu masked true sea-level rise for decades Revised tallies confirm that the rate of…

How They airbrushed out the Inconvenient Pause

By Christopher Monckton of Brenchley In November 2015, just before the faithful gathered around their capering, gibbering witch-doctors and shamans in Paris for the New Superstition’s annual festival of thanks…

Do the Adjustments to the Global Land+Ocean Surface Temperature Data Always Decrease the Reported Global Warming Rate?

Guest Post by Bob Tisdale If you’ve read the first two posts in this series you might already believe you know the answer to the title question.  Those two posts…

UPDATED: Do the Adjustments to Land Surface Temperature Data Increase the Reported Global Warming Rate?

Guest Post by Bob Tisdale This is an update of the post published a week ago here (WattsUpWithThat cross post is here). That earlier post included “raw” unadjusted data based…

"Thorough, not thoroughly fabricated: The truth about global temperature data"… Well, not *thoroughly* fabricated.

Guest post by David Middleton Featured image borrowed from here. If you can set aside the smug, snide remarks of the author, this article does a fairly good job in…

The Oddities in NOAA’s New “Pause-Buster” Sea Surface Temperature Product – An Overview of Past Posts

Guest Post by Bob Tisdale NOAA revised their global surface temperature product in June 2015 to show more global warming during the post-1998 period. Those data manipulations supposedly ended the…

Corrupted Australian Surface Temperature Records

Older records may be fragile but was diligence any better in recent decades? Guest essay by Bob Fernley Jones Background: Out of over 20,000 Bureau of Meteorology (BoM) weather stations…

Approximately 92% (or 99%) of USHCN surface temperature data consists of estimated values

An analysis of the U.S. Historical Climatological Network (USHCN) shows that only about 8%-1% (depending on the stage of processing) of the data survives in the climate record as unaltered/estimated data.…

Winners and losers in the GHCN estimation derby

Guest essay by John Goetz As noted in an earlier post here, approximately 66% of the GHCN record is estimated after processing by the GHCN adjustment models. In the current…

Grandma Learns About Data Adjustment: A little story about how data adjustment might work in everyday life.

Note: On Thursday of this week, NOAA/NCDC will attempt to rewrite the surface temperature record yet again, making even more “adjustments” to the data to achieve a desired effect. This…

Inquiry Launched Into Global Temperature Data Integrity

The International Temperature Data Review Project London, 26 April 2015 – The London-based think-tank the Global Warming Policy Foundation is today launching a major inquiry into the integrity of the…

Can Temperature Adjustments Right a Wrong?

Guest Post by John Goetz Adjustments to temperature data continue to receive attention in the mainstream media and science blogs. Zeke Hausfather wrote an instructive post on the Climate Etc.…

New Paper Confirms the Hiatus Is Not Occurring at the Poles, Undermining the Efforts of Cowtan and Way

Guest Post by Bob Tisdale Pierre Gosselin of NoTrickZone reports on a paper that confirms the slowdown in global surface warming has not been occurring at the poles. See Pierre’s…

Theory on the Pause – climate science has 'exhausted adjustment rationales'

Global Warming is real and is definitely caused by human-produced carbon . . . pencil lead, that is. Guest essay by Ralph Park Global Warming Theory – An impressive collection…

Anthropogenic Warming in the CET Record?

Guest essay by Neil Catto The CET record started in 1659 close to the minimum of the little ice age. As such, it is with no surprise that last year…

HADCRUT4 Adjustments – Discovering Missing Data or Reinterpreting Existing Data? (Now Includes September Data)

Guest Post by Werner Brozek and Just The Facts: To begin, we would like to sincerely thank Tim Osborn of the University of East Anglia (UEA), Climatic Research Unit (CRU)…

Is NOAA Wrong?

Guest Post by Willis Eschenbach On another post here on Watts Up With That, a commenter pointed out that NOAA says that September 2014 was the warmest September ever on record. The…