Subscribe free to our newsletters via your
. 24/7 Space News .

Medieval writings link volcanic eruptions, cold weather
by Staff Writers
Cambirdge, Mass. (UPI) Jun 5, 2013

disclaimer: image is for illustration purposes only

Medieval chronicles offer a look from the past to assess how volcanic eruptions affected the weather in Ireland for more than 1,200 years, scientists say.

An international group of researchers assessed more than 40,000 written entries in the Irish Annals and compared them with measurements taken from ice cores to link the climatic consequences of volcanic eruptions to extreme cold weather events in Ireland for a 1200-year period from 431 to 1649, a study published in the journal Environmental Research Letters reported.

Over this timescale as many as 48 explosive volcanic eruptions could be identified in Greenland ice cores that record the deposition of volcanic ash in annual layers of ice.

Of those, 38 were associated closely in time with extreme cold events -- identified by systematically examining written entries in the Irish Annals and then picking out directly observed meteorological phenomena and conditions, such as heavy snowfall and frost, prolonged ice covering lakes and rivers, and contemporary descriptions of abnormally cold weather, researchers said.

"It's clear that the scribes of the Irish Annals were diligent reporters of severe cold weather, most probably because of the negative impacts this had on society and the biosphere," lead study author Francis Ludlow from the Harvard University Center for the Environment and Department of History said.

Volcanic eruptions can play a significant role in the regulation of Earth's climate through the injection into the stratosphere of sulphur dioxide gas, which is converted into sulphate aerosol particles that reflect incoming sunlight and result in an overall temporary cooling of the planet's surface.

"Our major result is that explosive volcanic eruptions are strongly, and persistently, implicated in the occurrence of cold weather events over this long timescale in Ireland," Ludlow said. "In their severity, these events are quite rare for the country's mild maritime climate."

The Irish Annals contain more than 1 million written words and about 40,000 distinct written entries, detailing major historical events on an annual basis.


Related Links
Bringing Order To A World Of Disasters
When the Earth Quakes
A world of storm and tempest

Comment on this article via your Facebook, Yahoo, AOL, Hotmail login.

Share this article via these popular social media networks DiggDigg RedditReddit GoogleGoogle

Memory Foam Mattress Review
Newsletters :: SpaceDaily :: SpaceWar :: TerraDaily :: Energy Daily
XML Feeds :: Space News :: Earth News :: War News :: Solar Energy News

Panic and chaos as Argentina, Chile brace for volcano eruption
Buenos Aires (UPI) May 30, 2013
Argentina and Chile braced for more chaotic conditions as authorities battled to secure an orderly evacuation of people living in communities in a border area at risk from a restive volcano. Attempts to complete the evacuation of more than 3,000 residents from communities near the 9,700-foot Copahue Volcano in Chile were hampered by arguments over the evacuees' livestock and the animals ... read more

NASA's GRAIL Mission Solves Mystery of Moon's Surface Gravity

Moon dust samples missing for 40 years found in Calif. warehouse

Unusual minerals in moon craters may have been delivered from space

Moon being pushed away from Earth faster than ever

Curiosity Mars Rover Nears Turning Point

The Crowning Glory of Mars

Mars Curiosity Rover Provides Strong Evidence for Flowing Water

Ten Years At Mars: New Global Views Plot History Of The Red Planet

Peanut butter, pyjamas, parmesan launched into space

White House moves to curb 'patent trolls'

A certain level of stress is necessary

Northrop Grumman-Built Modular Space Vehicle Nears Completion of Manufacturing Phase

Crew Shuffles for Shenzhou 10

Shenzhou 10's Missing Parts

Shenzhou's Code of Silence

Shenzhou-10 spacecraft to be launched in mid-June

International trio takes shortcut to space station

Science and Maintenance for Station Crew, New Crew Members Prep for Launch

ESA Euronews: Living in space

Next destination: space

Europe launches record cargo for space station

New chief urges Ariane 5 modification for big satellites

The Future of Space Launch

Rocket Engine Maker Proton-PM to Invest in New Products

Stellar Winds May Electrify Exoplanets

Little Scope Discovers Metal-Poor Cousin of Famous Planet

Rare Stellar Alignment Offers Opportunity To Hunt For Planets

In feat, telescope directly spots lightweight exoplanet

To improve today's concrete, do as the Romans did

Magnetic monopoles erase data

Mind-controlled games on show at Asia's biggest IT fair

Atom by atom, bond by bond, a chemical reaction caught in the act

The content herein, unless otherwise known to be public domain, are Copyright 1995-2014 - Space Media Network. AFP, UPI and IANS news wire stories are copyright Agence France-Presse, United Press International and Indo-Asia News Service. ESA Portal Reports are copyright European Space Agency. All NASA sourced material is public domain. Additional copyrights may apply in whole or part to other bona fide parties. Advertising does not imply endorsement,agreement or approval of any opinions, statements or information provided by Space Media Network on any Web page published or hosted by Space Media Network. Privacy Statement