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Volcanoes and global cooling

Found this amazing essay published on National geographic

Colossal volcano behind ‘mystery’ global cooling finally found

The eruption devastated local Maya settlements and caused crop failures around the world

https://www.nationalgeographic.com/science/2019/08/colossal-volcano-behind-mystery-global-cooling-found/?cmpid=org=ngp::mc=social::src=twitter::cmp=editorial::add=tw20190823science-colossalvolcanomystery::rid=&sf218005129=1


Some extracts

The ices of Greenland and Antarctica bear the fingerprints of a monster: a gigantic volcanic eruption in 539 or 540 A.D. that killed tens of thousands and helped trigger one of the worst periods of global cooling in the last 2,000 years. Now, after years of searching, a team of scientists has finally tracked down the source of the eruption.

The team’s work, published in Quaternary Science Reviews, lays out new evidence that ties the natural disaster to Ilopango, a now-dormant volcano in El Salvador. Researchers estimate that in its sixth-century eruption, Ilopango expelled the equivalent of 10.5 cubic miles of dense rock, making it one of the biggest volcanic events on Earth in the last 7,000 years. The blast was more than a hundred times bigger than the 1980 Mount St. Helens eruption and several times larger than the 1991 eruption of Mount Pinatubo. It dealt the local Maya settlements a blow that forever altered their trajector……

el salvador

 

Ice cores from Greenland and Antarctica show spikes of sulfate, a byproduct of large volcanic eruptions, at 536 and either 539 or 540. The two volcanoes were so large and so violent, they launched sulfur gases and particles miles into the sky. Since this material reflected sunlight away from Earth’s surface, it triggered severe global cooling: One 2016 study found that the volcanoes decreased average global temperatures by as much as 3.6 degrees Fahrenheit……

……

geologists published new evidence that the historical “dust veil” of 536 was caused by a volcano. In the other, researchers announced that the Tierra Blanca Joven extended into marine sediments off the coast of El Salvador. The Tierra Blanca Joven eruption was even bigger than Dull and others thought.…….

………..

Dull’s team also revised their estimate of Ilopango’s size, taking into account the thickness and spread of Tierra Blanca Joven deposits. They say that Ilopango may have even dwarfed the 1815 Tambora eruption, a huge volcanic event that ushered in “a year without a summer” because of the global cooling it caused. Ilopango likely launched up to a million tons of sulfur miles into the sky, high enough for stratospheric winds to spread the aerosols worldwide and trigger global cooling.…..


The actual Research paper

https://www.sciencedirect.com/science/article/abs/pii/S0277379119301465

Radiocarbon and geologic evidence reveal Ilopango volcano as source of the colossal ‘mystery’ eruption of 539/40 CE

https://doi.org/10.1016/j.quascirev.2019.07.037

 

 

 

 

 

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Climate shifts…natural variation

I have started this blog post because today l have found out all major search engines are re routing the search string ‘climate shift’.

If you enter this term into any search engine, it will respond with pages and pages of ‘climate change’

We are being prevented from viewing alternative theories to man made climate change theories or facts, folks.

I will make an attempt to collect some links to climate regime shift sites that focus on natural variability.

I have tried alternatives to google and they ALL redirect the term ‘climate shift’

…You can get around this by..

Using google scholar…

which will accept the string ‘climate shift’ and lead you to alternative research on the reasons for global temperature trends other than AGW

or

on on the main google search engine page use talking marks on the search string which over rides the ban on the term… climate shift

“climate shift”

 

 

 

 

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GLOBAL EXTREME COLD EVENTS

2019

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Global temperature anomaly 2019

Some scientists suggesting a global cooling with the solar downturn in the next 30yrs or more .

I won’t be around for that long but why not take a few medical records of planet earth temperature anomaly this year.

It might be a good exercise just to keep a tab’

This site gives an 8-14 day forecast

https://weather.gc.ca/ensemble/naefs/semaine2_combinee_e.html

Forecast period May 10th to 17th 2019

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Lack of sunspots to bring record cold, warns NASA scientist

EXTRACT…..“The sun is entering one of the deepest Solar Minima of the Space Age,” wrote Dr Tony Phillips just six weeks ago, on 27 Sep 2018.

Sunspots have been absent for most of 2018 and Earth’s upper atmosphere is responding, says Phillips, editor of spaceweather.com.

Data from NASA’s TIMED satellite show that the thermosphere (the uppermost layer of air around our planet) is cooling and shrinking, literally decreasing the radius of the atmosphere.

To help track the latest developments, Martin Mlynczak of NASA’s Langley Research Center and his colleagues recently introduced the “Thermosphere Climate Index.”

The Thermosphere Climate Index (TCI) tells how much heat nitric oxide (NO) molecules are dumping into space. During Solar Maximum, TCI is high (meaning “Hot”); during Solar Minimum, it is low (meaning “Cold”).

“Right now, it is very low indeed … 10 times smaller than we see during more active phases of the solar cycle,” says Mlynczak”

source of article

November 2018

https://www.iceagenow.info/lack-of-sunspots-to-bring-record-cold-warns-nasa-scientist/

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UKMO’s latest global 5 yr temperature forecast

The forecast seems to have lost its Hockey stick.. Is anyone surprised?


quote
“Figure 3: Observed (black, from Hadley Centre, GISS and NCDC) and predicted (blue) global average annual surface temperature difference relative to 1981-2010. Previous predictions starting from November 1960, 1965,… 2005 are shown in red, and 22 model simulations from the Coupled Model Intercomparison Project phase 5 (CMIP5), that have not been initialised with observations, are shown in green. In all cases, the shading represents the probable range, such that the observations are expected to lie within the shading 90% of the time. The most recent forecast (blue) starts from November 2014. All data are rolling 12-month mean values. The gap between the black curves and blue shading arises because the last observed value represents the period November 2013 to October 2014 whereas the first forecast period is November 2014 to October 2015.”
READ ON HERE
http://www.metoffice.gov.uk/research/climate/seasonal-to-decadal/long-range/decadal-fc
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Thanks to BOB TISDALE for notifying the blogosphere of this release and forecast
His commentary is here
https://bobtisdale.wordpress.com/2015/02/05/many-mixed-signals-in-the-ukmos-latest-5-year-global-surface-temperature-forecast/#more-8713