Which mercury reading in Mercury is the right one?

How can two stations less than 1/2 mile apart be so different? How can one set a new record and best it by two degrees while the other doesn’t? I…

It seems NOAA has 'de-modernized' the official Death Valley station to use older equipment to make a record more likely

About those ‘record’ Death Valley temperatures everybody is waiting for… UPDATE: 128°F today at Death Valley COOP station. See Record Event Report below. It seems the media and the alarmists…

Friday Funny: New world record temperature 'hockey stick' spotted in Washington today

Gotta love this, with all the hullabaloo over a possible new world temperature record in Death Valley, a logging town in Washington has pre-empted them. Hilariously, the reading of 139…

Hottest weather of the season likely coming

Model output from WeatherBell added by Anthony By Steve Pierce, AMS chapter president, Oregon Portland, Oregon (June 25th 2013) –  “The hottest weather of the season is likely on the…

A data review to supplement the UK Met Office 'Disappointing Weather Meeting'

A graphical review of 14.5 years disappointing UK weather Guest essay by Neil Catto A meeting today (18th March 2013) took place at the UK Met Office HQ in Exeter.…

New paper by Ross McKitrick – 'temperature data strongly affected by local population growth'

Ross McKitrick writes: I give a demonstration of why the Parker and BEST analyses don’t disprove the evidence of contamination of temperature data, and outline what it would likely take…

Are We in a Pause or a Decline? (Now Includes at Least April* Data)

Image Credit: WoodForTrees.org Guest Post By Werner Brozek, Edited By Just The Facts *At least April data was my intention. However as of June 8, HadCRUT3 for April is still…

Opensource Temperature Data Monitoring Spreadsheet Updating Methodology

Image Credit: Walter Dnes By Walter Dnes – Edited and Comment by Just The Facts and Werner Brozek In my recent WUWT post I introduced an Opensource Temperature Data Monitoring…

CO2 by the numbers: having the courage to do nothing

Guest essay by Ed Hoskins. Some simple numbers on the effect of CO2 concentration on temperature As the temperature increasing effect of atmospheric CO2 is known to diminish logarithmically with…

Does the Pacific Decadal Oscillation have predictive skill for global temperature?

Reader Eric Worrall writes: I was playing with Wood For Trees, looking at the relationship between Pacific Decadal Oscillation vs global temperature (Hadcrut 4), when the following graph appeared. The…

Coldest Spring In England Since 1891

By Paul Homewood Originally, it was thought to be the coldest spring since 1962. Winter? Teesdale in County Durham blanketed in snow on May 23 in what is likely to…

Modeling sea ice loss

From Wiley Study explores atmospheric impact of declining Arctic sea ice There is growing recognition that reductions in Arctic sea ice levels will influence patterns of atmospheric circulation both within…

Slaying the 'Slayers' with Watts – part 2

Light Bulb Back Radiation Experiment Guest essay by Curt Wilson In the climate blogosphere, there have been several posts recently on the basic principles of radiative physics and how they…

Crowdsourcing An Opensource Temperature Data Monitoring Methodology and Spreadsheet

Image Credit: Walter Dnes By Walter Dnes – Edited by WUWT Regular Just The Facts I have developed a methodology and spreadsheet to capture and chart HadCRUT3, HadCRUT4, GISS, UAH,…

Claim: How the IPCC arrived at climate sensitivity of about 3 deg C instead of 1.2 deg C.

UPDATE from Girma: “My title should have been ‘How to arrive at IPCC’s climate sensitivity estimate’ instead of the original” Guest essay by Girma Orssengo, PhD 1) IPCC’s 0.2 deg…

Climate models getting worse than we thought

New paper finds climate models are getting worse rather than better Via the Hockey Schtick: A paper published today in Geophysical Research Letters finds that the latest climate models are…

A mean study of Australian temperature

Mean and reported “Mean” temperatures and the consequences of the difference Guest essay by Tom Quirk The convention in meteorology is to report mean temperatures as the average of minimum…

UAH global temperature, down significantly

Dr. Roy Spencer reports: Our Version 5.5 global average lower tropospheric temperature (LT) anomaly for April, 2013 is +0.10 deg. C, down from +0.18 deg. C in March (click for…

On the scales of warming worry magnitudes–part 1

A few weeks after my paper came out I have received quite unexpected but greatly appreciated offer from Anthony to write a summary of the paper for his blog site.…

A Big Picture Look At “Earth’s Temperature” – "The Pause" Update

Image Credit: NASA and BP.Blogspot.com By WUWT regular “Just The Facts” Recently there has been significant attention focused on “The Pause” in Earth’s warming, the length of “The Pause” and…

Crowdsourcing the WUWT Paleoclimate Reference Page – Disputed Graphs – Alley (2000)

Image Credit: Photobucket.com – GISP2 – Alley, 2000 By WUWT regular “Just The Facts” In building WUWT Paleoclimate Reference Page during these crowdsourcing threads (1, 2) there have been a…

Michael Mann says climate models cannot explain the Medieval Warming Period – I say they can't even explain the present

Ice core data shows CO2 levels changed less than 10 parts per million from 1600-1800 during the MWP. From the Hockey Schtick:  A new paper from Schurer et al (with Mann…

Another proxy study with an 'unprecedented' temperature claim

UPDATE: McIntyre discovers a serious flaw right away, more upside down Mann world – he writes: In keeping with the total and complete stubbornness of the paleoclimate community, they use…

Are Climate Models Realistic? (Now Includes at Least February Data)

Guest Post By Werner Brozek, Edited By Just The Facts (Note: If you read my report with the January data and just wish to know what is new with the…