Comments to the July 2018 global surface air temperature overview Temperature quality class 1: Lower troposphere temperature from satellites Temperature quality class 2: HadCRUT global surface air temperature Temperature quality class 3: GISS and NCDC global surface air temperature Comparing global surface air temperature and satellite-based temperatures Global air temperature linear trends
Global temperatures: All in one, Quality Class 1, 2 and 3
Global sea surface temperature
Ocean temperature in uppermost 100 m
North Atlantic heat content uppermost 700 m
North Atlantic temperatures 0-800 m depth along 59N, 30-0W
Global ocean temperature 0-1900 m depth summary
Global ocean net temperature change since 2004 at different depths
La Niña and El Niño episodes
Troposphere and stratosphere temperatures from satellites
Zonal lower troposphere temperatures from satellites
Arctic and Antarctic lower troposphere temperatures from satellites Temperature over land versus over oceans
Arctic and Antarctic surface air temperatures
Arctic and Antarctic sea ice
Sea level in general
Global sea level from satellite altimetry
Global sea level from tide gauges
Northern Hemisphere weekly and seasonal snow cover
Atmospheric specific humidity
Atmospheric CO2
The phase relation between atmospheric CO2 and global temperature
Global air temperature and atmospheric CO2
Latest 20-year QC1 global monthly air temperature change
Sunspot activity and QC1 average satellite global air temperature
Climate and history: 1728: Vitus Bering and the non-discovery of Bering Strait
Temperatures can be measured from the ground and from satellites. Satellite data have two versions, UAH and RSS. The version of UAH (University of Alabama, Huntsville) makes a solid impression. The RSS version shows larger deviations and suggests a stronger warming.
How come?
Doping the data
Both datasets surely get their data from similar satellites. The explanation lies in a “post-processing” of the measured values by the RSS group. In the chart below you can see the old version in red.
Global temperature based on RSS satellite measurements. From Climate4You Newsletter June 2018.
There is frustration and reward when an article appears on the same topic of an article you are completing – in this case the Holocene. Such was the case this week with Andy May’s article “A Review of temperature reconstructions.” Andy points out the basic problems of reconstruction using proxy data for the most recent half of the Holocene – an issue central to historical climate and climate change studies. His paper did not alter my paper except as it reinforces some arguments.
This article examines the entire Holocene and illustrates the history that influenced the studies. There are two distinct parts to the studies, the pre and post Intergovernmental Panel on Climate Change (IPCC). The former is a genuine scientific struggle with issues of terminology and reconstruction, and the latter a scientific struggle to impose a political perspective regardless of the evidence. Because of the damage done to climatology by the proponents of anthropogenic global warming (AGW), both parts require explanation.
Somebody said economists try to predict the tide by measuring one wave. This puts them in the same league as climate scientists trying to predict the climate by measuring one variable, CO2. It is no surprise that an amalgam of the two, climate and economics, produces even worse results, but that is what happened early in the anthropogenic global warming (AGW) deception.
De tous temps les hommes se sont intéressés au climat et ont tenté de prévoir son évolution. Dès l’Antiquité il était connu que des caractéristiques géographiques comme la latitude mais aussi l’altitude ou le voisinage de vastes étendues d’eau avaient une grande influence sur le climat. Sur cette base les climatologues ont été amenés à distinguer différents types de climats tels que tropical, désertique, tempéré, polaire, etc. Ensuite, il est progressivement apparu que le climat est un système extrêmement complexe qui dépend de l’activité solaire ainsi que de la distance et de l’orientation de la Terre par rapport au Soleil, facteurs qui varient à des échelles de temps très différentes.
by P. Homewood, August 7, 2018 in NotaLotofPeopleKnowThat
Climate change: ‘Hothouse Earth’ risks even if CO2 emissions slashed
It may sound like the title of a low budget sci-fi movie, but for planetary scientists, “Hothouse Earth” is a deadly serious concept.
Researchers believe we could soon cross a threshold leading to boiling hot temperatures and towering seas in the centuries to come.
Even if countries succeed in meeting their CO2 targets, we could still lurch on to this “irreversible pathway”.
Their study shows it could happen if global temperatures rise by 2C.
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The utterly corrupt body of climate science has been getting ever more desperate to scare people about climate change and thereby submit to their radical anti capitalist agenda.
People are not falling for it, so we are now being subjected to ever more absurd announcements like this.
During the 1930s, when the atmospheric CO2 concentration was about 100 ppm lower than today (310 ppm vs. 410 ppm), United States heat waves were just as if not more common than recent decades.
Recently there has been much ado about heat waves and the hottest-ever-recorded-temperatures making their rounds in Northern Hemisphere summer.
Yet scientists have determined that heat waves are largely driven by natural variability, not anthropogenic CO2 emissions.
But while Scripps is trying to tie the record-high ocean reading to the broader wave of media coverage on global heat waves, there are a few caveats to note about what the scientists found.
First, these measurements are taken from a pier that’s near the shoreline, which would not necessarily make it representative of the entire Pacific Ocean, and therefore easily influenced by local weather events.
The “anomalously warm temperatures for the past week” that Scripps researchers observed at their pier somewhat mirror the temperature pattern in 1931, and indeed, the daily records broken in the past week have been very close to readings from 87 years ago.
There is an upward trend in temperature readings from Scripps’ pier, but the trend seems to also broadly coincide with the flipping of a natural ocean cycle, the Pacific Decadal Oscillation, to its warm phase. That flip occurred around 1976.
by P. Homewood, August 1, 2018 in NotaLotofPeopleKnowThat
There have been just seven summers over 20c since 1910:
1911
1933
1947
1976
1995
2003
2006
While we don’t know how this summer will work out (and neither does Bob Ward), since 2006 we have had eleven distinctly average summers.
The hot summers above are still rare events, and are all essentially weather events. There is no evidence that these extreme weather events are becoming more frequent.
by Tony Heller, July 31, 2018 in ClimateChangeDispatch
July 31 afternoon temperatures have been declining in the US for a century, with the hottest year being 1917 when almost half of the US was over 95 degrees.
Climatologists trying to predict global warming forgot the sunshine in their sums. After correction of this startling error of physics, global warming will not be 2 to 4.5 K per CO2doubling, as climate models imagine. It will be a small, slow, harmless and net-beneficial 1.17 K.
by Tony Heller, July 30, 2018 in ClimateChangeDispatch
In 1999, NASA’s James Hansen was concerned that the very high-quality US temperature record didn’t match Hansen’s fake global warming trend.
How can the absence of clear climate change in the United States be reconciled with continued reports of record global temperature? Part of the “answer” is that U.S. climate has been following a different course than global climate, at least so far. Figure 1 compares the temperature history in the U.S. and the world for the past 120 years.
in the U.S. there has been little temperature change in the past 50 years, the time of rapidly increasing greenhouse gases — in fact, there was a slight cooling throughout much of the country …
by Cliff Mass, July 25, 2018 in CliffMassWeatherCimateBlog
There appears to be a problem with the temperature sensor at Seattle-Tacoma Airport: it seems to be running several degrees too warm.
This is not the first time this has happened. And excessively warm temperatures at airport stations seems to be a growth industry around here. In a previous blog I talked about the problem at Yakima–which has been fixed. Ellensburg is running too warm as well.
But this blog will be about Seattle-Tacoma Airport, whose official NWS/FAA temperature sensor is located between two of the runways.
Encore dans toutes les mémoires, la canicule de 2003 et ses 15 000 morts n’a pas été la plus meurtrière de la France du XXe siècle.
Il faudra marquer cette année 1911 d’une croix noire. » Voilà ce qu’écrivait, à la fin de l’été, un médecin du département de la Seine inférieure. À l’évidence traumatisé par les conséquences de la terrible vague de chaleur qui frappa alors, de juillet à septembre, toute l’Europe mais surtout la France et la Belgique. « Pendant la longue période de chaleur, la mort n’a cessé de faucher les tout-petits élevés au biberon », ajoutera ce médecin.
Une canicule de juillet à septembre
Encore dans toutes les mémoires, la canicule de 2003 et ses 15 000 morts n’a pas été la plus meurtrière en France. C’est ce que rappelait Catherine Rollet dans un article (1) paru en 2010. Cette historienne et démographe, décédée en décembre 2016, y racontait la dramatique canicule de l’été 1911.
The temperature of the last 100 years was also the topic of a new publication by Folland et al. 2018. The authors are very much at home in the camp of the IPCC and had to admit that there have been phases of cooling, stagnating or even slow warming: 1896 – 1910, 1941 – 1975, and 1998 – 2013.
Climate models struggle with this because CO2 is climbing steadily. So why does climate warming stall under these conditions? Folland and his colleagues examined the models and are convinced that despite the small problems, the models function perfectly well and thus no other climate factors need to be accounted for.
In 1940s it was a bit too warm and the models were unable to reproduce this. Given, the authors say. Greenhouse gases have been responsible for almost all the warming of the last 125 years.
…
Now isn’t it a bit odd that the authors made absolutely no mention of the ocean cycles in the abstract? As our regular readers know, the ocean cycles run surprisingly synchronous with the fluctuations in global temperatures, i.e. the key factors here are the AMO and PDO.
PDO ocean cycle and its fluctuations in the global temperature development. Source: Book ‘Die kalte Sonne‘.
A new study published in Geophysical Research Journalshows that the so-called Little Ice Age — a period stretching from 1500 to 1850 in which mean temperatures in the northern hemisphere were considerably lower than at present — exerted effects on the climate of South America.
Based on an analysis of speleothems (cave formations) in the Brazilian states of Mato Grosso do Sul and Goiás, the study revealed that in the seventeenth and eighteenth centuries, the climate of southwestern Brazil was wetter than it is now, for example, while that of the country’s Northeast region was drier.
The same Brazilian cave records showed that the climate was drier in Brazil between 900 and 1100, during a period known as the Medieval Climate Anomaly (MCA), when the northern hemisphere’s climate was warmer than it is now.
No matter how hard climate-catastrophe obsessed alarmists attempt to beat out a little doom from the data, their results still fall far way short of their projections. Moreover, the modest warming the planet has seen over the recent decades is tied more to natural cycles.
The upcoming 6th IPCC Sixth Assessment Report will be a “comprehensive assessment of the science” related to climate change and published in 2022. However, don’t expect it to be “comprehensive” at all as hundreds of scientific publications showing profound impacts by sun and oceans will go ignored.
Climate science has turned into a religion that centers on a single act of faith. Human CO2 is changing our climate.
In the past it was always understood that climate was impacted by a vast array of factors, such oceanic cycles, solar cycles, aerosols, cloud cover, etc. to name a few.
Remarkably, some Japanese families kept weather record diaries in the 1700 and 1800s, and some for as long as 150 years. The connections they reveal are tantalizing but so incomplete. We are trying to fish out primitive signals from murky water. The Sun turns around on itself every 27 days, so these researchers are looking for repeating patterns in lightning that fit, but the poles of the sun spin slower than the equator and the sun spots can take their own time. Hence, it’s not a neat “27″ days.
During periods of high solar activity, they found regular peaks in lightning activity with the right timing, from May to September when the cold Siberian air mass is not so influential.
Other studies we’ve discussed here have investigated long solar cycles on the 11 year or 200 year scales ….
by P. Homewood, July 22, 2018 in NotaLotofPeopleKnowThat
Last week, the BBC seriously misled the public about so-called “heat records”, as I noted in this post here.
In particular the BBC made a song and dance about Southern California, even though the LA records were seriously compromised by siting in car parks or next to air conditioning exhaust vents.
But how does the recent Californian heatwave really compare with historical weather?
Fairmont is a rural USHCN station, just 110 km north of LA, and with a long term record dating back to 1922. (There is some data going back to 1909 as well):
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: …
The sun has been blank for 21 days–3 whole weeks without sunspots. To find an equal number of consecutive spotless days in the historical record, you have to go back to July-August 2009 when the sun was emerging from an unusually deep solar minimum. Solar minimum, welcome back!
Unearthed new evidence (Mangerud and Svendsen, 2018) reveals that during the Early Holocene, when CO2 concentrations hovered around 260 ppm, “warmth-demanding species” were living in locations 1,000 km farther north of where they exist today in Arctic Svalbard, indicating that summer temperatures must have been about “6°C warmer than at present”.
Proxy evidence from two other new papers suggests Svalbard’s Hinlopen Strait may have reached about 5 – 9°C warmer than 1955-2012 during the Early Holocene (Bartels et al., 2018), and Greenland may have been “4.0 to 7.0 °C warmer than modern [1952-2014]” between 10,000 and 8,000 years ago according to evidence found in rock formations at the bottom of ancient lakes (McFarlin et al., 2018).
In these 3 new papers, none of the scientists connect the “pronounced” and “exceptional” Early Holocene warmth to CO2 concentrations.
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La géologie, une science plus que passionnante … et diverse
