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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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GLOBAL EXTREME COLD EVENTS

2019

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Are the Mount Sinabung eruptions ..effecting our weather?

LINKS

https://climatecrocks.com/2019/06/09/cheering-the-volcanhttps://twitter.com/AndrewDessler/status/1137813438514835458o/

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2019 SNOW Australia

There had been a couple of early snow falls as the AAO dropped strongly negative in late February,  the jetstream meandered and the westerly belt brought bursts of cold air onto Tasmania and southern alps

A short period of +AAO in early March and then another steep drop in the AAO , not as steep. Down to neutral. A week later and we have another. old pool being cut off to affect Victoria and the NSW alpine districts 30th March and 1st April.

Link for AAO/SAM

https://www.cpc.ncep.noaa.gov/products/precip/CWlink/ENSO/verf/new.aao.shtml

30th March 2019. Here is the thickness forecast showing 536 thickness over the Ballarat ranges initially. The cold pool then to combine with a surface trough over Alpine regionssnow 30th March 2019http://www.bom.gov.au/australia/charts/viewer/index.shtml?type=mslp-thick&tz=AEDT&area=Au&model=CG&chartSubmit=Refresh+View

mount baw baw 30_3_2019

Also snow on alps in NSW and inland NSW

Rob G.We’re at 1260m. Snow shower started with big wet flakes, then small hail. A few small flakes falling now.
stoxxo..Also snowing at Edith south of Oberon at about 1190m, impressive for March!
waveridee..Ditto Black Springs apparently.

Adaminaby Angler Loc: Anglers Reach NSW; 1,290 m  Was most certainly snowing down here, I can tell you that! Lovely, fat flakes indeed. laugh Was out & about driving much of the day; overseeing the yonder snow-laden alps.

However, what shocked me the most was getting the call from my relative at Black Springs-Shooters Hill (who owns the property there—precisely where I was for much of last year at 1,277 m AMSL); snowing up North too!

Never have thought the snow would fall so far northerly this time of year…absolutely unusual. Something tells me this upcoming snow season might be one for the books. smirk

Gotta love the contrast from January til’ now!

http://forum.weatherzone.com.au/ubbthreads.php/topics/1496752/Re_NSW_Day_to_Day_Weather_2019#Post1496752

another forum thread snow 2019.

http://forum.weatherzone.com.au/ubbthreads.php/topics/1496834/Re_2019_Australian_Snow_Season#Post1496834

Eigerwand“Well this appears to have been a pretty good little to whet the appetite for the season ahead. Saw some footage on Snowsearch from Perisher this morning, enough snow to make everything white 🤩

Rsav”Today I took the chairlift from Thredbo up to Eagles Nest and walked as far as Mt Kosciuszko Lookout. A winter wonderland up on top, quite a sight for so early in the year.”

FOR ALL SNOW REPORTS FROM APRIL ONWARD SCROLL DOWN TO COMMENTS SECTION WHERE L WILL POST.

Click on the Title if the comments need loading. Please feel free to comment or add to the information

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A study of cold fronts in Australia

I will collect information and observations

2019

Forecast for 532 thickness for Tasmania 6 days into Autumn. which can bring low level snow

low level snow tasmania 6th march 2019

dynamic jetstream AAO negative 4_3_2019

ABOVE

Nothing like a wavy sub polar jet associated with a negative dip in the AAO/ SAM since —early February 2019, to produce dynamic wavy jetstreams at the 200hpa stratosphere.

and satellite picture BELOW ……………………….

is the cold pool in the Bight 5th March 2019. The day before it travails over Tasmania.

The cold pool sits within the bulge of the sub polar jet but at the surface layer

The cold air is transported north into NSW  by the southern  and eastern flank of the

Mid -latitude High

5_3_2019. cold pool ijn the bight

SOURCE. BOM

http://www.bom.gov.au/australia/charts/viewer/index.shtml?type=mslp-thick&tz=AEDT&area=Au&model=CG&chartSubmit=Refresh+View

__________________________________________________________

Temperatures got down to 9.8 deg in Hobart and light splatter of snow on Mount Wellington

Mount Baw baw in Gippsland Victoria also had a light dusting of snow with temps down to 0 deg c for most of the day

NEWS article

Mount Mawson 6th March 2019

quote from Ben ” 6th March 2019

Today’s taste of wintry weather comes less than a week after the state endured a day of record-breaking March heat.

Dover’s 40.1 degrees on Sunday was the first time on record any location in Tasmania has exceeded 40 degrees during March.

Eight other weather stations, including Hobart (39.1C), also beat Tasmania’s previous March maximum temperature record of 38.0 degrees on Sunday.

Impressively, Hobart’s 39.1 degrees on Sunday was also hotter than any day in the city during summer. Last season’s highest temperature was 37.9 degrees.

Sunday’s heat now seems like a distant memory, as much colder southwesterly winds flow over the state today.

Hobart was only sitting on 13 degrees at 10am, although wind chill was making it feel more like eight degrees.”

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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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The suns acceleration linked to the earths ice age cycles by TOM MANGO

 

minimum1843

minimum1986

https://goo.gl/photos/U2vt37BGBdMtknRg6

Hi Sue,
These two graphs indicate that there are times when solar
minimum occurs at or near the same location on the ecliptic.

When the Sun’s acceleration decreases during an Ice-age cycle
it’s orbit becomes more circular and average solar cycle length
becomes longer (approaching 11.86 years).

During the 12,000 year inter-glacial periods there is evidence
that this is happening to a lesser degree. Notice the 143 year
separation (Bretagnon wave?) between 1843 and 1986.

Tom

CRIKEY said”feel freee to ask TOM questions in the comments section below.
This post is an ongoing study of Toms’
Use the search facility to find his previous posts

l store all of Toms graphs in my solar system and the earths climate folder found here

https://photos.google.com/album/AF1QipPZNZR5fK3hL3r49fNZMvS_rEPP_5IyP3lQmlwR

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Maunder, Dalton , Gliessburg, Oort, MWP wolf , sporer

CLICK ON TITLE TO LOAD DISCUSSION IN THE COMMENTS BELOW

NEW RESEARCH . DECEMBER 2015..

TOM MANGO FINDS THE  MAUNDER MINIMUM IS PART OF A REPEATING CYCLE

His research and current forum discussion is found

https://weathercycles.wordpress.com/2016/01/08/earths-climate-linked-to-jupiter-saturn-and-the-solar-system-barycentre-discussion-open/comment-page-1/#comment-4198

https://weathercycles.wordpress.com/2015/01/08/following-tom-mango/

 

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Winter storm JONAS East coat of USA Jan 2016

23rd Jan 2016…JONAS ..3rd biggest winter storm since 1869

reports the Courier Mail in Australia ( 25th jan 2016)

EAST COAST OF USA

http://www.attn.com/stories/5388/2016-winter-storm-jonas-east-coast

From nth Carolina to New york and as far west as kentucky

On saturday the3 23rd jan 2016 New york had 63.4cm of snow

that is close to the record of 68.2cm in 2006 the record for single day snow fall

This event also coincided with a high tide flooding beaches in cape Bay new Jersey

( courier mail )

TOTAL TRAVEL BAN FOR NEW YORK CITY

http://www.theguardian.com/us-news/live/2016/jan/23/blizzard-snowstorm-washington-new-york-east-coast#block-56a3bdd5e4b05f5c24ca596d

Photographer Giles Clarke sent these photos of the blizzard in New York City through GuardianWitness.

 CENTRAL PARK NEW YORK CITY
Deep snow drifts

CENTRAL PARK