by Cornwall Alliance, from Dr. Roy Spencer, January 2, 2017
2017 Third Warmest in the 39-Year Satellite Record
Global Satellite Monitoring of Temperature Enters its 40th Year
The Version 6.0 global average lower tropospheric temperature (LT) anomaly for December, 2017 was +0.41 deg. C, up a little from the November, 2017 value of +0.36 deg. C
by M Bastach, January 5, 2017 in ClimateChangeDispatch
Record snowfall, a “bomb cyclone” and cold Arctic air have once again stirred up the debate over global warming’s impact on winter weather.
Some climate scientists are pointing the finger at manmade global warming as a culprit behind recent wintry weather, but there’s not a lot of evidence or agreement that global warming is currently driving extreme cold and snow (…)
by K Richard, September 11, 2017 in NoTricksZone
Contrary to expectations, climate scientists continue to report that large regions of the Earth have not been warming in recent decades.
According to Dieng et al. (2017), for example, the global oceans underwent a slowdown, a pause, or even a slight cooling trend during 2003 to 2013. This undermines expectations from climate models which presume the increase in radiative forcing from human CO2 emissions should substantially increase ocean temperatures.
The authors indicate that the recent trends in ocean temperatures “may just reflect a 60-year natural cycle“, the AMO (Atlantic Multidecadal Oscillation), and not follow radiative forcing trends.
by Antony Watts, January 3, 2017 in WUWT
From the University of Alabama, Huntsville.
Global Temperature Report: December 2017
Global climate trend since Nov. 16, 1978: +0.13 C per decade
December temperatures (preliminary)
Global composite temp.: +0.41 C (about 0.74 degrees Fahrenheit) above 30-year average for December.
Northern Hemisphere: +0.50 C (about 0.90 degrees Fahrenheit) above 30-year average for December.
Southern Hemisphere: +0.33 C (about 0.59 degrees Fahrenheit) above 30-year average for December.
Tropics: +0.26 C (about 0.47 degrees Fahrenheit) above 30-year average for November.
by JoNova, January 3, 2018
Other countries are failing to meet their targets, but we’re not only achieving them, we’re overdoing it. And this is despite our obvious handicaps: like that we have rapid population growth, are further from everywhere and anywhere* except for Antarctica, and we’re the largest coal exporter in the world;
(…)
by Christopher Monckton, January 3, 2018, in WUWT
The indefatigable Roy Spencer at the University of Alabama at Huntsville is the first to declare the global temperature anomaly for December 2017. As Fig. 1 shows, in the 39 years 1 month from December 1978 to December 2017, the planet has warmed by half a Celsius degree. But that is equivalent to 1.28 C°/century, or little more than one-third of the 3.3 C°/century predicted with “substantial confidence” by IPCC in 1990 and also by the fifth-generation general-circulation models of the Climate Model Intercomparison Project in 2013.
by T Laepple and P Huybers, July 14, 2014 in PNAS
Determining magnitudes of sea surface temperature variability is important for attributing past and predicting future changes in climate, and generally requires the use of proxies to constrain multidecadal and longer timescales of variability. We report a multiproxy estimate of sea surface temperature variability that is consistent between proxy types and with instrumental estimates but strongly diverges from climate model simulations toward longer timescales. At millennial timescales, model−data discrepancies reach two orders of magnitude in the tropics, indicating substantial problems with models or proxies, or both, and highlighting a need to better determine the variability of sea surface temperatures.
by Joe Bastardi, December 3, 2017 in NoTricksZone
Meteorologist Joe Bastardi warned of a cold snap gripping the Eastern US many weeks ago, in October, at his Weatherbell Analytics site, which I visit almost daily.
Today it’s all over the news: The Great Freeze of 2017 is smashing through the entire North American East, bringing with it a wave of record temperatures.
by Will Kirby, December 31, 2017 in SundayExpress
More than 220 million Americans are preparing for the coldest New Year in living memory as the cold snap that has swept across the northern states prompts chaos across the country.
Temperatures atop the highest peak in the north-east, Mount Washington, hit a shocking -37 degrees celsius – breaking the previous record at the Mount Washington Observatory in New Hampshire of -35C which was set in 1933.
by K. Richard, December 28, 2017 in ClimateChangeDispatch
During 2017, 120 papers linking historical and modern climate change to variations in solar activity and its modulators (clouds, cosmic rays) have been published in scientific journals.
It has been increasingly established that low solar activity (fewer sunspots) and increased cloud cover (as modulated by cosmic rays) are highly associated with a cooling climate.
In recent years, the Earth has unfortunately left a period of very high solar activity, the Modern Grand Maximum. Periods of high solar activity correspond to multi-decadal- to centennial-scale warming.
Solar scientists are now increasingly forecasting a period of very low activity that will commence in the next few years (by around 2020 to 2025). This will lead to climate cooling, even Little Ice Age conditions.
Thirteen recently-published papers forecasting global cooling are listed below.
by Eric Worrall, December 28, 2017 in WUWT
Does record breaking winter cold cast doubt on climate predictions of milder winters? Could ANY weather or climate shift cast doubt on the dominance of that wicked little trace molecule? Apparently not, according to leading climate explainers.
by Dr David Whitehouse, December 24, 2017 in GWPF
The data for November 2017 HadCRUT4 (click on image to enlarge) has just been released by the UK Met Office. It is 0.547, better expressed as 14.55 +/- 0.10 °C. Given the substantial monthly variability evident in this database one has to be careful in drawing many conclusions about it. Given that, it is interesting to note that November 2017 is statistically the same as most Novembers of the so-called pause years, i.e. 1997, 2001, 2004, 2005, 2006, 2008, 2009, 2010, 2010, 2012, 2014 and even 2016.
by Dr David Whitehouse, December 22, 2017 in GWPF
We know that prediction is difficult, especially about the future as the saying goes, but as an entertainment in the festive season we are asking for your 2018 global temperature forecast.
Every year at this time the UK Met Office issues its forecast of the global annual temperature for the following year. This time it says that 2018 will be another very warm year globally, but it is unlikely to be a new record due to the cooling effect of about 0.1 °C from a moderate La Niña in the Pacific.
by Joshua Nevett, December 23, 2017 in DailyStar, UK
A GLOBAL cool down lasting 120 years will trigger “more intense” winters that threaten months of freezing temperatures and snow “within a few years”, climate scientists have warned.
See also here
by Willis Eschenbach, December 22, 2017 in WUWT
Reflecting upon my previous post, Where The Temperature Rules The Sun, I realized that while it was valid, it was just about temperature controlling downwelling solar energy via cloud variations. However, it didn’t cover total energy input to the surface. The total energy absorbed by the surface is the sum of the net solar energy (surface downwelling solar minus surface reflections) plus the downwelling longwave infrared, or DWIR. This is the total energy that is absorbed by and actually heats the surface.
by P Gosselin, December 15, 2017 in NoTricksZone
Geologist Dr. Norman Page left a comment which I’ve decided to upgrade to a post. In it he writes solar and La Nina observations fit well with his recent paper showing that climate is controlled by natural orbital and solar activity cycles.
Dr. Page is among a growing number of scientists who share the general view that natural solar and oceanic cycles are mostly driving the climate, just as they always have in the past.
by UAH and Dr. J. Christy in A. Watts, December 4, 2014 in WUWT
The average global temperature drop between October and November, 2017, tied for the fifth largest one-month-to-the-next drop in the 39-year satellite temperature record, according to Dr. John Christy, director of the Earth System Science Center (ESSC) at The University of Alabama in Huntsville. Compared to seasonal norms, the average temperature around the globe fell 0.27 C (almost 0.49 degrees F) between October and November. (The largest drop was from January to February 2013, when the global average temperature fell 0.32 C.)
by Anthony Watts, November 29, 2017 in WUWT
New research yields old result: Climate warming slow, steady. Observed value is half that of CMIP5 climate models.
The rate at which Earth’s atmosphere is warming has not significantly accelerated over the past 23 years, according to research at The University of Alabama in Huntsville (UAH).
If you take away the transient cooling in 1983 and 1992 caused by two major volcanic eruptions in the preceding years, the remaining underlying warming trend in the bottom eight kilometers (almost five miles) of the atmosphere was 0.096 C (about 0.17° Fahrenheit) per decade between January 1979 and June 2017.
That was unexpectedly close to the 0.09 C warming trend found when similar research was published in 1994 with only 15 years of data, said Dr. John Christy, director of UAH’s Earth System Science Center.
See also here
by P. Homewood, November 28, 2017 in NotaLotofpeopleKnowThat
We are all too familiar with graphs showing how much global temperatures have risen since the 19thC.
The HADCRUT version above is typical, and also very precise, with fairly tight error bars even in the early part of the record.
One wonders where they got the data to work all this out, because it certainly could not have come from thermometers.
All of the major global temperature datasets rely heavily on the Global Historical Climatology Network (GHCN). Yet as the “Overview of the Global Historical Climatology Network-Daily Database”, published by Matthew Menne et al in 2012, rather inconveniently showed, most of the world had little or no temperature data in the 19thC, and even up to 1950.
by Eric Worrall, November 22, 2017 in WUWT
Figure 1 shows one example of data derived from such proxy sources. The top panel of the figure shows a declining temperature trend over the 8,000-year period from the Holocene Climate Optimum to the modern warm period (left-hand scale). It also shows that this location experienced numerous cycles of warming and cooling that involved temperature changes of the order of two degrees Celsius.
by PJ Michaels and R Maue, November 23, 2017 in WUWT
Let’s face it, global surface temperature histories measured by thermometers are a mess. Recording stations come on-and offline seemingly at random. The time of day when the high and low temperatures for the previous 24 hours are recorded varies, often changing at the same station. Local conditions can bias temperatures. And the “urban heat island” can artificially warm readings with population levels as low as 2500. Neighboring reporting stations can diverge significantly from each other.
by Kenneth Richard, November 23, 2017 in NoTricksZone
According to the most basic precepts of anthropogenic global warming (AGW), variations in CO2 concentrations exert significant control on sea surface temperatures, glaciers, sea levels, and generalized climate dynamics (i.e., precipitation patterns).
In particular, high CO2 concentrations, driven by human activity, are presumed to cause dangerously warming ocean waters, rapid glacier melt and sea level rise, and overall disruption to the Earth’s biosphere.
Newly published scientific papers wholly undermine this popularized conceptualization.
In fact, according to Bertrand et al. (2017), there has been a “marked cooling” of sea surface temperatures in the southernmost South America region during the last ~800 years — 3°C to 4°C colder than during the Medieval and Roman warm periods — that has continued unabated into “the most recent decades”.
(…)
by A. Dinar, November 13, 2017 in GeoSpace-AGU
An international team of scientists, led by British Antarctic Survey (BAS), has produced a new map showing how much heat from the Earth’s interior is reaching the base of the Antarctic Ice Sheet. The map is part of a new paper accepted for publication in Geophysical Research Letters, a journal of the American Geophysical Union.
The team has produced the most up to date, accurate and high-resolution map of the so called ‘geothermal heat flux’ at the base of the Antarctic Ice Sheet. Of the basic information that shapes and controls ice flow, the most poorly known about is this heat
by Steve McIntyre, November 20, 2017 in ClimateAudit
Stenni et al (2017), Antarctic climate variability on regional and continental scales over the last 2000 years, was published pdf this week by Climate of the Past. It includes (multiple variations) of a new Antarctic temperature reconstruction, in which 112 d18O and dD isotope series are combined into regional and continental reconstructions.
