by Nagoya University, September 11, 2018 in ScienceDaily
Black carbon refers to tiny carbon particles that form during incomplete combustion of carbon-based fuels. Black carbon particles absorb sunlight, so they are considered to contribute to global warming. However, the contribution of black carbon to the heating of the Earth’s atmosphere is currently uncertain. Models that can accurately assess the warming effect of black carbon on our atmosphere are needed so that we can understand the contribution of these tiny carbon particles to climate change. The mixing state of black carbon particles and their particle size strongly influence their ability to absorb sunlight, but current models have large uncertainties associated with both particle size and mixing state.
by Anthony Watts, September 11, 2018 in WUWT
WUWT readers may recall that climate activists wanted the current epoch we live in to be named the “Anthropocene”, because they believe humans are the dominate force on the planet. The official organization that decides such things, The International Commission on Stratigraphy, would have none of it, and nixed the naming recently. Now, here’s a summary of the the Meghalayan.
Welcome to the new Meghalayan age – here’s how it fits with the rest of Earth’s geologic history
Associate Professor of Geosciences, University of Massachusetts Amherst
Jurassic, Pleistocene, Precambrian. The named times in Earth’s history might inspire mental images of dinosaurs, trilobites or other enigmatic animals unlike anything in our modern world.
by Ronald Bailey, September 4, 2018 in Reason
Global tree canopy cover increased by 2.24 million square kilometers (865,000 square miles) between 1982 and 2016, reports a new study in Nature.
Researchers using satellite data tracked the changes in various land covers to find that gains in forest area in the temperate, subtropical, and boreal climatic zones are offsetting declines in the tropics. In addition, forest area is expanding even as areas of bare ground and short vegetation are shrinking. Furthermore, forests in montane regions are expanding as climate warming enables trees to grow higher up on mountain.
by Tim Ball, September 9, 2018 in WUWT
The question is how does the Intergovernmental Panel on Climate Change (IPCC) determine that an increase in atmospheric CO2 causes an increase in global temperature? The answer is they assumed it was the case and confirmed it by increasing CO2 levels in their computer climate models and the temperature went up. Science must overlook the fact that they wrote the computer code that told the computer to increase temperature with a CO2 increase. Science must ask if that sequence is confirmed by empirical evidence? Some scientists did that and found the empirical evidence showed it was not true. Why isn’t this central to all debate about anthropogenic global warming?
by K. Richard, September 10, 2018 in NoTricksZone
Even though CO2 concentrations hovered well below 300 ppm throughout most of the Holocene, newly published paleoclimate reconstructions affirm that today’s surface temperatures are only slightly warmer (if at all) than the coldest periods of the last 10,000 years. This contradicts the perspective that temperatures rise in concert with CO2 concentrations.
Bottom Graph Source: Rosenthal et al. (2013)
by JoNova, September 8, 2018
Lets all bow to the IPCC — a modern God that shalt not be questioned. The Holy Sacred Climate Cow!
The IPCC is an unaudited and unaccountable foreign committee. Not only are no scientists paid to check its findings, now the publicly mandated BBC is making sure none of their journalists will check its findings either.
Carbonbrief has a copy of the BBC new internal guidance on how to report climate change.
In April, the UK regulator, Ofcom, found the BBC was guilty of not sufficiently challenging Lord Lawson, a skeptic. So in response the BBC now promises they will never sufficiently challenge the IPCC. That’s “false balance” for you.
by P. Homewood, September 11, 2018 in NotaLotofPeopleKnowThat
Arctic sea ice has gone under the radar a bit this summer, with alarmists’ propaganda drawn to heatwaves elsewhere.
As sea ice extent draws close to its minimum, it looks like finishing well above the last three years.
Temperatures across the Arctic are now falling rapidly:
by Anthony Watts, September 10, 2018 in WUWT
August Temperatures (preliminary)
Global composite temp.: +0.19 C (+0.34 °F) above seasonal average
Northern Hemisphere.: +0.21 C (+0.38°F) above seasonal average
Southern Hemisphere.: +0.16 C (+0.29 °F) above seasonal average
Tropics.: +0.12 C (+0.22 °F) above seasonal average
July Temperatures (final)
Global composite temp.: +0.32 C (+0.58 °F) above seasonal average
Northern Hemisphere.: +0.42 C (+0.76°F) above seasonal average
Southern Hemisphere.: +0.21 C (+0.38 °F) above seasonal average
Tropics.: +0.29 C (+0.52 °F) above seasonal average
by Ben Webster, September !, 2018 in TheSundayTimes
The BBC has told staff they no longer need to invite climate-change deniers on to its programmes, suggesting that allowing them to speak was like letting someone deny last week’s football scores.
It has also asked all editorial staff to take a course on how to report on climate change and said that its coverage of the topic “is wrong too often”.
by D. Middelton, September 8, 2018 in WUWT
Guest CNN-bashing by David Middleton (a geologist)
ran across this April 2018 article while looking for something else. I totally missed this episode of Trump Derangement Syndrome.
Secretary Zinke’s stance on climate change is one of several reasons the Climatariat News Network decided that he was being dishonest in describing himself as a geologist…
by P. Homewood, September 7, 2018 in NotaLotofPeopleKnowThat
Carbon Brief has obtained the internal four-page “crib sheet” sent yesterday to BBC journalists via an email from Fran Unsworth, the BBC’s director of news and current affairs. The crib sheet includes the BBC’s “editorial policy” and “position” on climate change.
All of the BBC’s editorial staff have also been invited to sign up for a one-hour “training course on reporting climate change”. Carbon Brief understands this is the first time that the BBC has issued formal reporting guidance to its staff on this topic.
by Anthony Watts, September 4, 2018 in WUWT
From the University of Bristol and the “models before measurements” department comes this highly speculative claim that is entirely based entirely on climate models. There’s no actual measured data from any sort of paleo research. It’s science, but not as we know it.
A new study by scientists at the University of Bristol has shown that ancient global warming was associated with intense rainfall events that had a profound impact on the land and coastal seas.
The Palaeocene-Eocene Thermal Maximum (PETM), which occurred about 56 Million years ago, is of great interest to climate scientists because it represents a relatively rapid global warming event, with some similarities to the human-induced warming of today.
Although there have been many investigations of how much the Earth warmed at the PETM, there have been relatively few studies of how that changed the hydrological cycle.
by P. Homewood, September 5, 2018 in NotaLotofPeopleKnowThat
This article in something called Inside Climate News seems to be typical of many I have seen this year: Because we have had much attention in the media on heat waves this year, there must be an upward trend in heat waves and that is a warning signal that man-made global warming is destroying the planet. Typical of these articles are a couple of features
Declaration of a trend without any actual trend data, but just a single data point of events this year
Unstated implication that there must be a trend because the author can’t remember another year when heat wave stories were so prevalent in the media
Unproven link to man-made global warming, because I guess both involve warmth.
by P. Homewood, September 6, 2018 in NotaLotofPeopleKnowThat
A lot of people have said they remember the summer of 1976 being hotter than this year. And they would be right.
According to CET data, at their peak temperatures went much higher and for longer than they did this summer. The only factor that kept the two summer remotely close was that in 1976 temperatures fell away during the middle of July to below average for a while.
by P. Homewood, September 3, 2018, in NotaLotofPeopleKnowThat
Global temperatures fell back to 0.19C in August. This means the YTD average is 0.23C, putting them back to roughly where they were in 2002.