by J. Cartwright, March 16, 2018 in A. Watts WUWT
WUWT readers may recall this chart which clearly illustrates just how uncertain climate science really is.
by A. Watts, March 15, 2018 in WUWT
This paper deals with the central argument that skeptics bring up about claims of global warming: How do you separate the temperature signal from the base components like natural variation, human land-use influence, micro-site bias, measurement errors and biases, and other factors to get the “true” global warming signal?
The answer is that you can’t, at least not easily.
With the surface temperature record, it’s somewhat easier since you can observe some of those elements directly and separate them (such as we’ve done in our surfacestations project for land-use microsite biases), but in the ocean, everything is homogenized by the ocean itself. All you can look for is patterns, and try to disentangle based on pattern recognition. That’s what they are trying to do here.
Disentangling Global Warming, Multidecadal Variability, and El Niño in Pacific Temperatures
Robert C. Wills, Tapio Schneider, John M. Wallace, David S. Battisti, Dennis L. Hartmann
by P. Homewood, March 15, 2015 in NotaLotofPeopleKnowThat
According to the heavily adjusted NOAA data, last month was the fifth warmest February on record in the Central Lakes Division of NY State, with an average mean temperature of 31.4F.
Prior to 1981, the warmest was February 1954, which averaged 29.8F. In other words, NOAA claim that February 1954 was 1.6F colder than last month.
Which all looks very suspicious, because the opposite picture is shown at the high quality station of Ithaca Cornell University (…)
by P. Gosselin, March 14, 2018 in NoTricksZone
German skeptic and weather expert ‘Schneefan’ here writes how climate activist Mark C. Serreze recently announced this year’s sea ice extent was at the smallest all-time area. But since then Arctic temperatures have plummeted and sea ice area has grown to over 14 million square kilometers (…)
by Judith Curry, March 9, 2018 inClimateEtc.
This post is motivated by a twitter thread from Andrew Dessler that responds to a recent ruling in the Northern California versus the oil companies lawsuit (discussed previously here) (…)
by David Archibald, March 10, 2018 on WUWT
This recent post discussed the end of the Modern Warm Period and the year that global cooling began. That post was inspired by a comment to a post on WUWT six to eight years ago to the effect that climate is controlled by the Sun’s magnetic flux – no need to worry about much else. The comment seemed to come from a warmer scientist – they are well funded, have plenty of time on their hands, some are smart and idle curiosity would get a few looking into what controls climate. The results would not be published of course. To paraphrase Mussolini, everything within the narrative, nothing outside the narrative, nothing against the narrative. If the Sun’s magnetic flux controls climate, you don’t have to worry about what goes on under the hood – the effect of EUV on the NAO, the GCR flux, the F10.7 flux, any other flux apart from the magnetic flux (…)
by Tony Heller, March 10, 2018 in TheDeplorableClimateScience
Global warming is no longer about imaginary global warming. It is now about an imaginary increase in extreme weather.
March of 2012 was very mild in the Eastern US, and NOAA’s Climate Extremes Index counted that as “extreme weather” – declaring 2012 to be the most extreme year on record.
by W. Eschenbach, March 9, 2018 in WUWT
I’m sure you can see the problem with Dr. Judith’s question—temperatures can rise without ANY new sources of heat or ANY change in existing sources of heat.
For example, regarding the climate system, every year there is more and more oil that goes into the ocean. This oil floats on the surface in a monomolecular layer, and it reduces both conduction and evaporation. As a result, the oceans end up slightly warmer than they would be without the oil … where is Dr. Judith’s mysterious “source of heat” supposedly driving that change?
Here’s another example … (…)
by Tony Heller, March 8, 2018 in TheDeplorableClimateScience
Antarctic ice cores show regular swings in temperature of more than 20 degrees. These were all natural, but the recent zero degree swing was caused by your SUV (…)
See also The Biggest Control Knob: CO2 in Earth’s Climate History
by M. Bastach, March 3, 2018 in DailyCaller
A group of prominent scientists are calling for a global network of advanced weather stations that don’t need to go through controversial data adjustments, and it’s vindication for global warming skeptics.
Seventeen climate scientists co-authored a research article published in the International Journal of Climatology calling for a global climate station network modeled after the United States Climate Reference Network (USCRN) to use as a baseline for data quality.
by University of Birmingham, March 2, 2018, in WUWT
As the Earth’s surface and atmosphere warm, the amount of moisture – water vapour – in the atmosphere will increase. Understanding the size of this increase is important for predicting future climates as water vapour is a significant greenhouse gas. Atmospheric moisture content also influences the patterns and intensity of rainfall events.
The relationship between temperature and moisture content can be explored by the study of intervals in Earth’s history when climates where significantly warmer than those seen in modern times, which necessitates a method for estimating ancient atmospheric moisture content.
by Dr Roy Spencer, February 22, 2018 in GlobalWarming
UPDATE(2/23/18): The previous version of this post had improper latitude bounds for the HadCRUT4 Tsfc data. I’ve rerun the results… the conclusions remain the same. I have also added proof that ENSO is accompanied by its own radiative forcing, a controversial claim, which allows it to cause multi-decadal climate change. In simple terms, this is clear evidence the climate system can cause its own, natural, internally-generated climate changes. This is partly what has caused recent warming, and the climate modelling community has assumed it was all human-caused.
by Dr Roy Spencer, March 1, 2018, in GlobalWarming
The Version 6.0 global average lower tropospheric temperature (LT) anomaly for February, 2018 was +0.20 deg. C, down a little from the January value of +0.26 deg. C (…)
by P. Homewood, February 28, 2018 in NotaLotofPeopleKnowThat
During the 1930s and 40s, and in earlier parts of the cycle, winters and spring were much warmer than, for instance, the 1960s and 70s. And, again, we see that those warmer decades were just as warm as recently.
It is these two seasons that have largely driven the annual changes.
In other words, the warmer winters we now commonly see in the Arctic are nothing new at all. They only appear unusual because we have started looking at data since 1954.
by A. Watts, February 23, 2018 in WUWT
How cities heat up
The way streets and buildings are arranged makes a big difference in how heat builds up, study shows
CAMBRIDGE, Mass. – The arrangement of a city’s streets and buildings plays a crucial role in the local urban heat island effect, which causes cities to be hotter than their surroundings, researchers have found. The new finding could provide city planners and officials with new ways to influence those effects.
Some cities, such as New York and Chicago, are laid out on a precise grid, like the atoms in a crystal, while others such as Boston or London are arranged more chaotically, like the disordered atoms in a liquid or glass. The researchers found that the “crystalline” cities had a far greater buildup of heat compared to their surroundings than did the “glass-like” ones.