Is the recent warming trend really unprecedented in earth's history?

[ding]

It's a stupid claim on face value designed to create a sense of emergency. Even Hollywood writers couldn't come up with a catastrophic global warming movie. There's nothing alarming about it to write about.

 

[ding]

A global warming action movie would be about as exciting as watching paint dry.

 

[22lcidw]

If that's what climate scientists say then they will have proof to offer that is reliable evidence to back it up.

Is that what climate science is saying unconditionally?

Is the OP really interested in learning the facts, or is it just more of what it seems to be?

A hit and run!

Progs use science as one of their many agenda words. But the truth it is political science. And the lemmings lap it up.

 

[Stryder50]

EXCERPTS:
Guest post by Dr. Don J. Easterbrook,
Dept. of Geology, Western Washington University

The GISP2 Greenland ice core has proven to be a great source of climatic data from the geologic past. Ancient temperatures can be measured using oxygen isotopes in the ice and ages can be determined from annual dust accumulation layers in the ice. The oxygen isotope ratios of thousands of ice core samples were measured by Minze Stuiver and Peter Grootes at the University of Washington (1993, 1999) and these data have become a world standard.

The ratio of 18O to 16O depends on the temperature at the time snow crystals formed, which were later transformed into glacial ice. Ocean volume may also play a role in δ18O values, but δ18O serves as a good proxy for temperature. The oxygen isotopic composition of a sample is expressed as a departure of the 18O/16O ratio from an arbitrary standard


δ18O =

(18O/16O)sample ‒ (18O/16O) x 103

____________________________________

(18O/16O)standard

where δ18O is the of ratio 18O/16O expressed in per mil (0/00) units.

The age of each sample is accurately known from annual dust layers in the ice core. The top of the core is 1987.

The δ18O data clearly show remarkable swings in climate over the past 100,000 years. In just the past 500 years, Greenland warming/cooling temperatures fluctuated back and forth about 40 times, with changes every 25-30 years (27 years on the average). None of these changes could have been caused by changes in atmospheric CO2 because they predate the large CO2 emissions that began about 1945. Nor can the warming of 1915 to 1945 be related to CO2, because it pre-dates the soaring emissions after 1945. Thirty years of global cooling (1945 to 1977) occurred during the big post-1945 increase in CO2.

But what about the magnitude and rates of climates change? How do past temperature oscillations compare with recent global warming (1977-1998) or with warming periods over the past millennia. The answer to the question of magnitude and rates of climate change can be found in the δ18O and borehole temperature data.

Temperature changes in the GISP2 core over the past 25,000 years are shown in Figure 1 (from Cuffy and Clow, 1997). The temperature curve in Figure 1 is a portion of their original curve. I’ve added color to make it easier to read. The horizontal axis is time and the vertical axis is temperature based on the ice core δ18O and borehole temperature data. Details are discussed in their paper. Places where the curve becomes nearly vertical signify times of very rapid temperature change. Keep in mind that these are temperatures in Greenland, not global temperatures. However, correlation of the ice core temperatures with world-wide glacial fluctuations and correlation of modern Greenland temperatures with global temperatures confirms that the ice core record does indeed follow global temperature trends and is an excellent proxy for global changes. For example, the portions of the curve from about 25,000 to 15,000 represent the last Ice Age (the Pleistocene) when huge ice sheets thousands of feet thick covered North America, northern Europe, and northern Russia and alpine glaciers readvanced far downvalley.

So let’s see just how the magnitude and rates of change of modern global warming/cooling compare to warming/cooling events over the past 25,000 years. We can compare the warming and cooling in the past century to approximate 100 year periods in the past 25,000 years. The scale of the curve doesn’t allow enough accuracy to pick out exactly 100 year episodes directly from the curve, but that can be done from the annual dust layers in ice core data. Thus, not all of the periods noted here are exactly 100 years. Some are slightly more, some are slightly less, but they are close enough to allow comparison of magnitude and rates with the past century.
...
Magnitude and rate of abrupt climate changes

Some of the more remarkable sudden climatic warming periods are shown listed below (refer also to Figure 1). Numbers correspond to the temperature curves on Figure 5.

1. About 24,000 years ago, while the world was still in the grip of the last Ice Age and huge continental glaciers covered large areas, a sudden warming of about 20°F occurred. Shortly thereafter, temperatures dropped abruptly about 11°F. Temperatures then remained cold for several thousand years but oscillated between about 5°F warmer and cooler.

2. About 15,000 years ago, a sudden, intense, climatic warming of about 21°F (~12° C caused dramatic melting of the large ice sheets that covered Canada and the northern U.S., all of Scandinavia, and much of northern Europe and Russia.

3. A few centuries later, temperatures again plummeted about 20° F (~11°C) and glaciers readvanced.

4. About 14,000 years ago, global temperatures once again rose rapidly, about 8° F (~4.5°C), and glaciers receded.

4. About 13,400 years ago, global temperatures plunged again, about 14° F (~8°C) and glaciers readvanced.

5. About 13,200 years ago, global temperatures increased rapidly, 9° F (~5°C), and glaciers receded.

6. 12,700 yrs ago global temperatures plunged sharply, 14° F (~8°C) and a 1300 year cold period, the Younger Dryas, began.

7. After 1300 years of cold climate, global temperatures rose sharply, about 21° F (~12° C), 11,500 years ago, marking the end of the Younger Dryas cold period and the end of the Pleistocene Ice Age.
...
The Medieval Warm Period (900 A.D. to 1300 A.D.)

The Medieval Warm Period (MWP) was a time of warm climate from about 900–1300 AD when global temperatures were apparently somewhat warmer than at present. Its effects were particularly evident in Europe where grain crops flourished, alpine tree lines rose, many new cities arose, and the population more than doubled. The Vikings took advantage of the climatic amelioration to colonize Greenland, and wine grapes were grown as far north as England where growing grapes is now not feasible and about 500 km north of present vineyards in France and Germany. Grapes are presently grown in Germany up to elevations of about 560 meters, but from about 1100 to 1300 A.D., vineyards extended up to 780 meters, implying temperatures warmer by about 1.0 to 1.4° C (Oliver, 1973, Tkachuck, 1983). Wheat and oats were grown around Trondheim, Norway, suggesting climates about one degree C warmer than present (Fagan, 2007).

The Vikings colonized southern Greenland in 985 AD during the Medieval Warm Period when milder climates allowed favorable open-ocean conditions for navigation and fishing. This was “close to the maximum Medieval warming recorded in the GISP2 ice core at 975 AD (Stuiver et al., 1995).

Elsewhere in the world, prolonged droughts affected the southwestern United States and Alaska warmed. Sediments in Lake Nakatsuna in central Japan record warmer temperatures. Sea surface temperatures in the Sargasso Sea were approximately 1°C warmer than today and the climate in equatorial east Africa was drier from 1000–1270 AD. An ice core from the eastern Antarctic Peninsula shows warmer temperatures during this period.

The Little Ice Age (1300 A.D. to the 20th century)
...

Easterbrook on the magnitude of Greenland GISP2 ice core data

MAGNITUDE AND RATE OF CLIMATE CHANGES Guest post by Dr. Don J. Easterbrook, Dept. of Geology, Western Washington University The GISP2 Greenland ice core has proven to be a great source of climatic …

wattsupwiththat.com

... Also;

WWU Prof Easterbrook on Global Warming

Dr. Don Easterbrook looks at global temperature swings over thousands of years when CO2 remained constant

nwcitizen.com

~~~~~~~~~~~~

Home | Don J. Easterbrook, Emeritus Professor of Geology| WWU​

 

[Stryder50]

Best advice?
Ignore Denier blog WUWT (aka WTFUWT)
You can't throw out NOAA clown.

`

I don't take advice from enviro-nazis.
They operate from a political agenda, not science.

 

[Flash]

 

[Stryder50]

Don J. Easterbrook, PhD Biography​

Title: Emeritus Professor of Geology at Western Washington University Position: Con to the question "Is Human Activity Primarily Responsible for Global Climate Change?" Reasoning:
“Despite no global warming in 10 years and recording setting cold in 2007-2008, the Intergovernmental Panel on Climatic Change (IPCC) and computer modelers who believe that CO2 is the cause of global warming still predict the Earth is in store for catastrophic warming in this century…

Global warming of the past century (0.8° C) is virtually insignificant when compared to the magnitude of at least 10 global climate changes in the past 15,000 years. None of these sudden global climate changes could possibly have been caused by human CO2 input to the atmosphere because they all took place long before anthropogenic CO2 emissions began. The cause of the ten earlier ‘natural’ climate changes was most likely the same as the cause of global warming from 1977 to 1998…

The Pacific Ocean has a warm temperature mode and a cool temperature mode, and in the past century, has switched back forth between these two modes every 25-30 years (known as the Pacific Decadal Oscillation or PDO). In 1977 the Pacific abruptly shifted from its cool mode (where it had been since about 1945) into its warm mode, and this initiated global warming from 1977 to 1998…

Global warming (i.e, the warming since 1977) is over. The minute increase of anthropogenic CO2 in the atmosphere (0.008%) was not the cause of the warming—it was a continuation of natural cycles that occurred over the past 500 years.”

“Global Cooling Is Here,” globalresearch.ca, June 28, 2014

Don J. Easterbrook, PhD - Climate Change - ProCon.org

[...]Read More...

climatechange.procon.org

 

[Stryder50]

Don J. Easterbrook's research while affiliated with Western Washington University and other places​

https://www.researchgate.net/scientific-contributions/Don-J-Easterbrook-73832038

~~~~~~~~~

 

[Stryder50]

 

[Stryder50]

 

[abu afak]

Guest post by Dr. Don J. Easterbrook,

Easterbrook on the magnitude of Greenland GISP2 ice core data

MAGNITUDE AND RATE OF CLIMATE CHANGES Guest post by Dr. Don J. Easterbrook, Dept. of Geology, Western Washington University The GISP2 Greenland ice core has proven to be a great source of climatic …

wattsupwiththat.com

... Also;

https://nwcitizen.com/entry/wwu-prof-easterbrook-on-global-warming[/URL

http://

http://[HEADING=1][URL='http://mywe... Emeritus Professor of Geology| WWU[/HEADING]

​

LOL Amateur Boy!!~
Your GEOLOGIST (and SPAM :LINK DUMPING GRAPHS) had it wrong. BIG TIME.
(WUWT scrapes up these Crackpots)

Don Easterbrook - Wikipedia

en.wikipedia.org

""In 2006, Easterbrook claimed that, based on past trends, "the current warm cycle should end soon and global temperatures should cool slightly until about 2035", and "the total increase in global warming for the century should be ~0.3 °C, rather than the catastrophic warming of 3-6°C (4-11°F) predicted by the IPCC."[1]​

In 2013, he testified that "global warming ended in 1998."[2] Easterbrook's claims have been contradicted by temperature data.[3][4]​

BUT IN FACT

Nineteen of the hottest years have occurred since 2000, with the exception of 1998, which was helped by a very strong El Niño.​

The year 2020 tied with 2016 for the hottest year on record since record-keeping began in 1880.""""​

https://climate.nasa.gov/vital-signs/global-temperature/[/indent]

RRRRRRRRRR......OUCH

`

 

[Stryder50]

LOL Amateur Boy!!~
Your GEOLOGIST (and SPAM :LINK DUMPING GRAPHS) had it wrong. BIG TIME.
(WUWT scrapes up these Crackpots)

Don Easterbrook - Wikipedia

en.wikipedia.org

""In 2006, Easterbrook claimed that, based on past trends, "the current warm cycle should end soon and global temperatures should cool slightly until about 2035", and "the total increase in global warming for the century should be ~0.3 °C, rather than the catastrophic warming of 3-6°C (4-11°F) predicted by the IPCC."[1]​

In 2013, he testified that "global warming ended in 1998."[2] Easterbrook's claims have been contradicted by temperature data.[3][4]​

BUT IN FACT

Nineteen of the hottest years have occurred since 2000, with the exception of 1998, which was helped by a very strong El Niño.​

The year 2020 tied with 2016 for the hottest year on record since record-keeping began in 1880.""""​

https://climate.nasa.gov/vital-signs/global-temperature/[/indent]

RRRRRRRRRR......OUCH

`

Assuming the data used in your links is correct and not manipulated, it didn't get as warm as you pro-ACC/AGW enviro-nazis claimed it would either.

Meanwhile, if you really believe in this false hypothesis, why are you still here, on the internet, living a lifestyle heavily based upon "fossil fuels"?

You should be out in the wilderness in your birthdate suit living off of grubs and lichens, etc.

 

[Stryder50]

The unproven hypothesis of human-caused/anthropogenic climate change(ACC) or anthropogenic global warming (AGW) is based on increase of CO2 levels over past couple of centuries, the "Industrial Age".

CO2 (carbon dioxide) is currently @400 ppm = Parts Per Million.
Expressed as a fraction 400/1,000,000
Fraction reduced per method one should have learned in K-12;
1/2,500

The unproven hypothesis of ACC/AGW is that if the other 2,499 parts of nitrogen, oxygen, argon, etc. are at 70 degrees F, and one introduces the one part CO2 at 75 degrees F into that 2,499, then that 2,499 will increase in temperature by another degree or three.

Does this make logic and realistic sense to you (readers)?

 

[Stryder50]

Policy Based Evidence Making

According to the European Centre for Medium-Range Weather Forecasts, earth has warmed 1.21C since the 1970s. Global temperature trend monitor Satellites show very little warming during that period.…

realclimatescience.com

Climate Depot

A project of CFACT

www.climatedepot.com

 

[Flash]

The AGW weenies lost their credibility decades ago. They are a joke now.

 

[Stryder50]

 

[Stryder50]

'Worst-case' climate predictions are 'no longer plausible,' study​

...
The world is unlikely to reach the 'worst case scenario' of climate change by the end of the century, according to a new study, that found efforts to reduce emissions are helping keep warning under control.

The Paris Climate Agreement goal to limit global warming this century to 3.6 degrees Fahrenheit over pre-industrial temperatures was set in December 2015.

This urged nations to take action to reduce emissions of greenhouse gasses in order to forestal the most extreme climate change scenarios being predicted by scientists at the time - that could see temperatures rise by up to 9 degrees Fahrenheit.

However, a new study, by the University of Colorado Boulder, that looked at the latest data on emission levels, found those extreme temperatures, that would have led to a sharp rise in extreme weather events and sea rises, are no longer plausible.

The researchers found that the extreme scenarios and temperature increase predictions were based on outdated data from 15 years ago, that didn't take into account recent efforts to reduce emissions, and a move to renewable energy.
...

MSN

www.msn.com

MSM spin of course, still a slight damper on the alarmists.

 

[petro]

Hooray for global warming and fuck the polar bears.

Living in sub zero most of the winter, I welcome any warming trend.
Somehow I think my dream of sipping cocktails under a Palm Tree on the North Shore of Lake Superior is never actually going to happen.

If it wasn't for the last Great Warming, my house would currently be under a mile of ice.

 

[Stryder50]

Living in sub zero most of the winter, I welcome any warming trend.
Somehow I think my dream of sipping cocktails under a Palm Tree on the North Shore of Lake Superior is never actually going to happen.

If it wasn't for the last Great Warming, my house would currently be under a mile of ice.

If the Al Gorebots and "Abu Afak"s have their way at fixing the unbroke climates of this planet, your house could be back under that mile high ice in no time.

 

[abu afak]

'Worst-case' climate predictions are 'no longer plausible,' study​

...
The world is unlikely to reach the 'worst case scenario' of climate change by the end of the century, according to a new study, that found efforts to reduce emissions are helping keep warning under control.

The Paris Climate Agreement goal to limit global warming this century to 3.6 degrees Fahrenheit over pre-industrial temperatures was set in December 2015.

This urged nations to take action to reduce emissions of greenhouse gasses in order to forestal the most extreme climate change scenarios being predicted by scientists at the time - that could see temperatures rise by up to 9 degrees Fahrenheit.

However, a new study, by the University of Colorado Boulder, that looked at the latest data on emission levels, found those extreme temperatures, that would have led to a sharp rise in extreme weather events and sea rises, are no longer plausible.

The researchers found that the extreme scenarios and temperature increase predictions were based on outdated data from 15 years ago, that didn't take into account recent efforts to reduce emissions, and a move to renewable energy.
...

MSN

www.msn.com

MSM spin of course, still a slight damper on the alarmists.

YOUR LINK continues:

""'They said that temperatures are likely to rise by no more than 4 degrees Fahrenheit by 2100, and the 3.6F goal 'is still within reach' if emission reduction continues.

They warned a rise of 3.6F would still place a 'Significant Toll on the Planet', as it was a global average, with some areas of the world 'much warmer' and others colder.""

It will also mean accelerated Warming and Sea Level Rise, accelerated Release of Monster Methane which is 30-80x more powerful than CO2: a snowball effect.

Not their prediction is Gospell just one of the admittedly morte consrvative ones.

I DESTROYED your (LOL - "cooling') Eastmen Copy -Pastes and this is barely better.
and this one of course Acknowledges/Admits AGW.
`