by Sun X. et al., 2018 in CO2Science
Sun, X., Ren, G., Ren, Y., Fang, Y., Liu, Y., Xue, X. and Zhang, P. 2018. A remarkable climate warming hiatus over northeast China since 1998. Theoretical and Applied Climatology 133: 579-594.
A prominent feature of all climate model projections is their prediction that temperatures should be rising in response to ever-increasing concentrations of greenhouse gases. However, for the past two decades global surface air temperatures have not warmed to the degree predicted by the models, which lack of warming has been a conundrum to the climate alarmist movement.
by Anthony Watts, July 18, 2018 in WUWT
In response to a study from the University of Washington posted on WUWT (and elsewhere) today about a shift in the AMOC and a very clear statement about it not collapsing (as posited for collapse by many), including Michael Mann, Dr. Judith Curry gave this response to the Daily Caller’s Mike Bastasch: …
by Grégoire Canlorbe, June 18, 2018 in WUWT
Richard Siegmund Lindzen is an American atmospheric physicist known for his work in the dynamics of the atmosphere, atmospheric tides, and ozone photochemistry. He has published more than 200 scientific papers and books. From 1983 until his retirement in 2013, he was Alfred P. Sloan Professor of Meteorology at the Massachusetts Institute of Technology. He was a lead author of Chapter 7, “Physical Climate Processes and Feedbacks,” of the Intergovernmental Panel on Climate Change’s Third Assessment Report on climate change. He has criticized the scientific consensus about climate change and what he has called “climate alarmism.”
by Anthony Watts, June 10, 2018 i
On June 8th, the California Department of Forestry and Fire Protection (Cal Fire) made its first official announcement via press release that 12 big Northern California wildfires in October 2017 were caused by problems associated with electric utility power lines.
The October 2017 Fire Siege involved more than 170 fires and burned at least 245,000 acres in Northern California. About 11,000 firefighters from 17 states and Australia helped battle the blazes. They concluded that 12 Wildfires in Mendocino, Humboldt, Butte, Sonoma, Lake, and Napa Counties were caused by Pacific Gas & Electric (PG&E) “power and distribution lines, conductors and the failure of power poles.”
The words “global warming” and “climate change” were conspicuously absent from the announcement even…
by Anthony Watts, June 7, 2018 in WUWT
More excuses for “the pause”.
A team of researchers from the U.K. Met Office, Sweden and Australia has found that three periods of global warming slowdown since 1891 were likely due to natural causes rather than disruptions to the factors causing global warming. In their paper published on the open access site Science Advances, the group describes their study of global mean surface temperatures (GMST) since the late 19th century and what they found.
In this new paper, the researchers looked at GMST as registered by multiple sources around the globe over the past 127 years, noting the slow march of temperature increases. More specifically, they noted the three previously identified slowdowns in GMST increases—the time periods from 1896 to 1910, from 1941 to 1975, and then from 1998 to 2013. They then looked at factors that could have contributed to these slowdowns and found natural causes for each. (…)
by Ron Clutz, May 16, 2018 in ScienceMatters
Thanks to GWPF for publishing posthumously Bill Gray’s understanding of global warming/climate change. The paper was compiled at his request, completed and now available as Flaws in applying greenhouse warming to Climate Variability This post provides some excerpts in italics with my bolds and some headers. Readers will learn much from the entire document (title above is link to pdf).
The Fundamental Correction
The critical argument that is made by many in the global climate modeling (GCM) community is that an increase in CO2 warming leads to an increase in atmospheric water vapor, resulting in more warming from the absorption of outgoing infrared radiation (IR) by the water vapor (…)
Figure 14: Global surface temperature change since 1880. The dotted blue and dotted red lines illustrate how much error one would have made by extrapolating a multi-decadal cooling or warming trend beyond a typical 25-35 year period. Note the recent 1975-2000 warming trend has not continued, and the global temperature remained relatively constant until 2014.
by K. Richard, May 10, 2018 in NoTricksZone
During 2017, there were 150 graphs from 122 scientific papers published in peer-reviewed journals indicating modern temperatures are not unprecedented, unusual, or hockey-stick-shaped — nor do they fall outside the range of natural variability. We are a little over 4 months into the new publication year and already 81 graphs from 62 scientific papers undermine claims that modern era warming is climatically unusual.
by Ron Clutz, May 8, 2018 in ScienceMatters
Years ago, Dr. Roger Pielke Sr. explained why sea surface temperatures (SST) were the best indicator of heat content gained or lost from earth’s climate system. Enthalpy is the thermodynamic term for total heat content in a system, and humidity differences in air parcels affect enthalpy. Measuring water temperature directly avoids distorted impressions from air measurements. In addition, ocean covers 71% of the planet surface and thus dominates surface temperature estimates.
More recently, Dr. Ole Humlum reported from his research that air temperatures lag 2-3 months behind changes in SST. He also observed that changes in CO2 atmospheric concentrations lag behind SST by 11-12 months. This latter point is addressed in a previous post Who to Blame for Rising CO2?
by K. Richard, April 19, 2018 in NoTricksZone
The Arctic region was the largest contributor to the positive slope in global temperatures in recent decades.
Consequently, the anomalously rapid warming in the Arctic region (that occurred prior to 2005) has been weighted more heavily in recent adjustments to instrumental temperature data (Cowtan and Way, 2013; Karl et al., 2015) so as to erase the 1998-2015 hiatus and instead produce a warming trend.
Meanwhile, other scientists have been busy determining that only about 50% of the warming and sea ice losses for the Arctic region are anthropogenic, or connected to the rise in CO2 concentrations.
The rest of the warming and ice declines can be attributed to unforced natural variability.
by Uzbek, 2 avril 2018 in ClimatoRéalistes
La Global Warming Policy Foundation (GWPF) a publié son rapport sur l’état du climat pour 2017. Etabli par Ole Humlum, Professeur émérite à l’Université d’Oslo, ce rapport est un examen complet du climat mondial.
En voici les 10 principales conclusions :
1. Il est probable que 2017 ait été une des années les plus chaudes depuis le début des mesures instrumentales en 1850, moins chaude cependant que 2016.
2. À la fin de l’année 2017, la température moyenne à la surface de la planète avait retrouvé les niveaux antérieurs à l’épisode El Niño. Cela montre que la hausse récente des températures mondiales a été causée principalement par ce phénomène océanographique dans le Pacifique. Cela suggère aussi que le « hiatus » se poursuivra dans les années à venir.
by P. Homewood, April 5, 2018 in NotaLotofPeopleKnowThat
Hadcrut now have numbers out for February, giving an anomaly of 0.523C, measured against the 1961-90 baseline, slightly down on January’s 0.556C.
This means that the last six months have been below 0.59C.
It is clear that temperatures are settling down at a similar level to the period between 2002 and 2007, following the record El Nino of 2015/16. Bear in mind as well that the degree of accuracy, according to the Hadley Centre, is about +/-0.1C. As such, it cannot be said that there has been any statistically measurable warming since 2001, or indeed previously.
It is possible temperatures may drop further in coming months, with weak La Nina conditions established, although these are predicted to disappear by the summer.
by Paul Homewood, March 27, 2018 in NotaLotofPeopleKnowThat
The GWPF has published its State of the Climate 2017 Report, written by Ole Humlum, former Professor of Physical Geography at the University Centre in Svalbard, Norway, and Emeritus Professor of Physical Geography, University of Oslo, Norway.
Here are the main points:
Full report .pdf
by P Homewood, January 27, 2018 in NotaLotofPeopleKnowThat
I see that reality is beginning to intrude upon the dangerous global warming team. They say ” it is plausible, if not likely, that the next 10 years of global temperature change will leave an impression of a ‘global warming hiatus’.”
Climate is controlled by natural cycles. Earth is just past the 2003+/- peak of a millennial cycle and the current cooling trend will likely continue until the next Little Ice Age minimum at about 2650.See the Energy and Environment paper at http://journals.sagepub.com/doi/full/10.1177/0958305X16686488
and an earlier accessible blog version at http://climatesense-norpag.blogspot.com/2017/02/the-coming-cooling-usefully-accurate_17.html
by Dr David Whitehouse, January 17, 2018 in GWPF
It is clear that 2017 was a very warm year. Tomorrow, NOAA, NASA and the UK Met Office will announce by how much. It won’t be a record-breaker, but it will be in the top five, and that has already started comments about why it has been so hot. After all, the record-setting El Niño temperatures of the 2015-16 are over – so why did it remain so hot? The reason, according to some, is clear: the resurgence of global warming. The year 2017 is the hottest non-El Niño year ever and therefore signifies a dramatic increase of global warming after 20-years or so when the global temperature hasn’t done very much.
See also here
by Anthony Watts, January 7, 2018 in WUWT
From Investors Business Daily
Climate Myths: We keep reading about how the extreme weather of 2017 is the “new normal” thanks to global warming — even if the weather in question is frigid air. But the data don’t show any trend in extreme weather events in the U.S. for decades. Science, anyone?