Another Study Confirms Global Warming ‘Hiatus’

It has been claimed that the early-2000s global warming slowdown or hiatus, characterized by a reduced rate of global surface warming, has been overstated, lacks sound scientific basis, or is unsupported by observations. The evidence presented here contradicts these claims.

Fyfe et al, just published at, provides further confirmation of the ‘slowdown’ or ‘hiatus’ in global warming that has been noted by such wide ranging sources as the IPCC AR5, NASA, UAH, RSS, the Met Office, and virtually every other data source on global temperature. Indeed, the much vaunted Karl et al (2015), which claims a few highly questionable ‘adjustments’ to the data (mostly modifications of the sea surface temperatures) effectively erase the ‘hiatus’ is very much an outlier on this matter in the peer reviewed literature. READ MORE…


DMI disappears an inconvenient sea ice graph

Watts Up With That?

One of the graphs we have had on the WUWT sea ice page has been the DMI graph showing 30% concentration of sea ice extent, there has been a widening divergence between the two Arctic sea ice extent graphs produced by DMI.  WUWT reader David Burton writes:

Until a few days ago, Denmark’s Meteorologiske Institut (DMI) graphed Arctic sea ice extent two ways. They had a graph comparing the current year to the preceding ten years’ “30%+ concentration” Arctic sea ice extent, with coastal zones masked out, by graphing each year in a different color on the same horizontal timescale.


They also had (and still have) a graph comparing the current year to the preceding four years’ “15%+ concentration” Arctic sea ice extent (and I don’t know how they handle coastal zones in that version). In both graphs, the current (partial) year is plotted with a heavier black line.

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Are Environmentalism and Global Warming Effectively Religious Socialism?

Dr. Tim Ball (, historical climatologist, retired professor, and author of the Amazon top-100 climatology and environmental science book  The Deliberate Corruption of Climate Science (see an excellent review here) gives a succinct and insightful explanation of the genesis of and moving forces behind the massive disinformation campaign that is Climate Change alarmism.

Watts Up With That?

Guest Opinion: Dr. Tim Ball

A scene from the NYC "peoples climate march" in September 2014 A scene from the NYC “peoples climate march” in September 2014

An interesting pattern developed early in the official involvement in global warming. If a person challenged the claim that humans were causing global warming (AGW), it was assumed they were on the political right. If you supported AGW, then you were on the left. This categorization is not related to the science, but to the political nature of the science involved. This occurred in two major parts. The original objective of those using global warming for their political agenda and the marginalizing of those who questioned the science by linking them to industries and their wealthy owners. The author believes the evidence shows that human CO2 is not causing AGW, that the hypothesis is not proved. This article is not written to pick political sides. Rather, it is an attempt to help understand the…

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Karl et al ‘Pause-buster’ Paper Debunked Again

In June 2015, NOAA NCEI Director Thomas R. Karl published a paper “Possible artifacts of data biases in the recent global surface warming hiatus” that concludes

Here we present an updated global surface temperature analysis that reveals that global trends are higher than reported by the IPCC, especially in recent decades, and that the central estimate for the rate of warming during the first 15 years of the 21st century is at least as great as the last half of the 20th century. These results do not support the notion of a “slowdown” in the increase of global surface temperature.

In addition to the several problems with the questionable data adjustments made by Karl et al that have been thoroughly documented and analyzed by Bob Tisdale, Anthony Watts, Judith Curry, Richard S. Lindzen, Arno Arrak, Ross McKitrick, Patrick J. Michaels, Paul C. Knappenberger, Christopher Monckton of Brenchley, S. Fred Singer, and others in the following articles to name a few: READ MORE…

How not to measure temperature (or climate) #97 – California’s warming air temperatures are population and site bias related

Watts Up With That?

A couple of days ago, I highlighted a worst of the worst NOAA climate monitoring station in Arizona with the help of a scientist from the University of Washington.

My friend Jim Goodridge, former California State Climatologist continues to be busy in his retirement, and sends this along today. He’s been tracking a group of weather stations in California, and has been doing so for over 20 years. In fact, it was Jim who first introduced me to that light bulb moment where I realized that global warming wasn’t really all it was cracked up to be when he made this short publication in the Bulletin of the American Meteorological Society in 1996.

I guess you could say it was the graph that launched a thousand blog posts, because as we all know, CO2 can’t heat differently based on county population.


So with that in mind, have a look at his…

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New NOAA forecast suggests current El Niño will fade fast, and be replaced by a strong cooling La Niña this year

Watts Up With That?

Dr. Roger Pielke Sr. directs me to this new forecast product from NOAA’s Earth System Research Laboratory (ESRL). If it holds, it suggests a big cooling event ahead.

NOAA/ESRL PSD and CU CIRES Forecast in Global Tropics Domain

LIM forecasts of SST anomalies based on November-December-January 2015-2016 initial conditions. Contour interval is 0.3 degrees C. For numerical values click here.



He adds:

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Colossal Antarctic ice-shelf collapse followed last ice age

Watts Up With That?

From the “things Earth does without our help” department:

Study: 100,000 square miles of Ross Ice Shelf disappeared in 1,500 years


HOUSTON — (Feb. 18, 2016) — In a new study that provides clues about how Antarctica’s nation-sized Ross Ice Shelf might respond to a warming climate, U.S. and Japanese oceanographers have shown that a 100,000-square-mile section of the ice shelf broke apart within 1,500 years during a warming period after the last ice age.

The Ross Ice Shelf is the world’s largest ice shelf, a vast floating extension of the West Antarctic Ice Sheet that is about the size of France. But at the end of the last ice age, it extended much farther north and covered the entire Ross Sea.

A study in this week’s Proceedings of the National Academy of Sciences details how the ice shelf shrank during a period of climate warming following…

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