Eyjafjallajökull volcano on Iceland erupts

By: Dr. Jeff Masters , 02:11 PM GMT del 15 Aprile 2010

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The Eyjafjallajökull volcano on Iceland erupted Wednesday, sending a towering cloud of volcanic ash 6 - 11 km (20,000 - 36,000') high in the air from its 1666 meter (5500') high peak. The ash cloud has caused a dramatic interruption of air traffic over much of northern Europe today, and this disruption will spread southwards and eastwards over the next day as the ash cloud gradually spreads and disperses (Figure 2.)


Figure 1. Ash plume from Eyjafjallajokull Volcano over the North Atlantic at 11:35 UTC April 15, 2010. Image credit: NASA.


Figure 2. Forecast extent of the ash cloud from the Eyjafjallajökull volcano on Iceland at 12 UTC (8 am EDT) and 00 UTC tonight (8 pm EDT.) The red colors show the extent between the surface and 20,000', the green colors between 20,000 - 35,000', and the blue line between 35,000 - 55,000'. Commercial jetliners typically cruise at 35,000'. Image credit: UKMET Office.

Iceland volcano not likely to significantly affect the climate or weather
Volcanic eruptions are capable of significantly cooling the climate for 1 - 2 years after a major eruption spews sulfur dioxide gas forcefully enough so that it reaches the stratosphere. Once in the stratosphere, the gas reacts to form highly reflective sulfuric acid droplets mixed with water (sulfate aerosol particles). Our volcanoes and climate page covers the topic in more detail. Let's examine recent volcanic eruptions that have had a significant cooling effect on the climate. In the past 200 years, Mt. Pinatubo in the Philippines (June 1991), El Chichon (Mexico, 1982), Mt. Agung (Indonesia, 1963), Santa Maria (Guatemala, 1902) Krakatoa (Indonesia, 1883), and Tambora (1815) all created noticeable cooling. The Mt. Pinatubo and El Chichon eruptions caused a greater than 10% drop in sunlight reaching the surface. The eruption of Tambora in 1815 had an even greater impact, triggering the famed Year Without a Summer in 1816. You'll notice from the list of eruptions above that all of these climate-cooling events were from volcanoes in the tropics. Above the tropics, the stratosphere's circulation features rising air, which pulls the sulfur-containing volcanic aerosols high into the stratosphere. Upper-level winds in the stratosphere tend to flow from the Equator to the poles, so sulfur aerosols from equatorial eruptions get spread out over both hemispheres. These aerosol particles take a year or two to settle back down to earth, since there is no rain in the stratosphere to help remove them. However, if a major volcanic eruption occurs in the mid-latitudes or polar regions, the circulation of the stratosphere in those regions generally features pole-ward-flowing, sinking air, and the volcanic aerosol particles are not able to penetrate high in the stratosphere or get spread out around the entire globe.

There have been at least two exceptions to the tropics-only rule. Realclimate.org discusses the eruption of the Laki volcano in Iceland, between 1783-1784. The eruption was probably not able to inject much sulfur into the stratosphere. However, since the eruption was sustained for so long, significantly elevated sulfur concentrations were seen in the lower atmosphere over much of the Atlantic and European regions, which had a pronounced cooling effect on the region.

scienceblog.com has an interesting article about the largest volcanic eruption of the 20th century--the 1912 eruption of Alaska's Mt. Novarupta, located in the same chain of volcanoes as Mt. Redoubt. According to a NASA computer model, Novarupta's climate-cooling aerosols stayed north of 30°N latitude, and did not cause global cooling. However, the model indicates that the eruption may have indirectly weakened India's summer monsoon, producing an abnormally warm and dry summer over northern India.

It does not appear that the current eruption of the Eyjafjallajökull volcano on Iceland was large enough to alter the atmospheric circulation of the Northern Hemisphere and cause a change in the late spring/early summer weather patterns. A series of several major eruptions over the next few weeks would be required for that to happen. The volcano is also too far north for the cooling effect of its ash cloud to affect the sea surface temperatures in the tropical Atlantic for the coming hurricane season. However, the ash could should bring spectacular sunsets to Europe over the next week, and to North America by sometime next week, as the jet stream wraps the ash cloud eastwards across the Northern Hemisphere.

Portlight aid ship nears Haiti
Portlight.org continues to work hard to get food and medical supplies into the earthquake zone in Haiti. Their latest effort is a shipment of 30,000 pounds of rice and 20,000 pounds of other supplies, mostly medical equipment, that has been loaded onto the schooner Halie and Mathew. The schooner is expected to land in Haiti today to deliver the supplies. Please visit the Portlight.org web site or the Portlight blog to learn more and to donate to this worthy cause.


Figure 2. Relief supplies for Haiti earthquake victims being loaded onto the schooner Halie and Mathew.

Paul Timmons (Presslord) and Pat Pearson (Patrap) of Portlight will on the Internet radio show, the Daily Downpour Link. The hosts are wunderground meteorologists Shaun Tanner and Tim Roche. The show airs today, Thursday, April 15, at 4pm Eastern.

Jeff Masters

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Member Since: Agosto 25, 2009 Posts: 20 Comments: 6785
hey KEEPEROFTHEGATE, I think we found you a new photo for your avatar.

Quoting barbamz:
A radar picture of the craters as seen by Coast Guard Plane on April 15. Really doesn't look like a smiley.

Taken from: http://www.icelandreview.com/icelandreview/daily_news/?cat_id=28304&ew_0_a_id=360867
Picture obviously had been reversed by the newspaper, so it looks more scary. lol.
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So how is everyone doing today? Has anyone seen or heard from AussieStorm?
Member Since: Agosto 25, 2009 Posts: 20 Comments: 6785
Quoting alexhurricane1991:
I know there was a 4.9 in utah but other than that no not heard anything else.

Here is a USGS map, showing that area is an active region for quakes:

Member Since: Agosto 25, 2009 Posts: 20 Comments: 6785
I know there was a 4.9 in utah but other than that no not heard anything else.
Member Since: Aprile 8, 2010 Posts: 15 Comments: 2572
Quoting CyclonicVoyage:



Great year to plant new grass and for the old grass to flourish. All the rains from this winter are really giving my grass a kick in the pants. I've been battling weed issues for over 2 years now and finally have the upper hand.


Awesome year in the SE for it...I am on a "slope" down to a creek on the property so I can't seed because of the wash-off and would rather plug, than sod, so I get get some root action going right away.......
Member Since: Agosto 8, 2006 Posts: 0 Comments: 9342
Quoting weathermanwannabe:
I just got an e-mail from a freind regarding earthquake tremors in Utah but don't see anything on the net news yet.......Anyone on here heard anything?

There was a 4.9Mw quake there yesterday evening.
Member Since: Agosto 25, 2009 Posts: 20 Comments: 6785
Quoting GeoffreyWPB:
One more ?. Has anyone invested in a portable battery digital T.V.? If so, what deals did you find?


Here's a good selection of them under 100 bucks with free shipping. Pictures on these digital LCDs are great, even getting High-Def TV locally.
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I just got an e-mail from a freind regarding earthquake tremors in Utah but don't see anything on the net news yet.......Anyone on here heard anything?
Member Since: Agosto 8, 2006 Posts: 0 Comments: 9342
An experienced pilot and instructor, Roman Choromanski, showed CNN's Fred Pleitgen the Polish crash approach conditions in a flight simulator.

Link
Member Since: Febbraio 11, 2010 Posts: 0 Comments: 851
Quoting weathermanwannabe:
436. CyclonicVoyage 8:31 AM EDT on April 16, 2010

I am with you; gonna be pluggin the lawn with St. Augustine (I am in North Florida with lots of shade in the yard from the oak trees) this weekend but will need to keep watering....Wish some of that rain would make it up to the Big Bend sometime soon..........



Great year to plant new grass and for the old grass to flourish. All the rains from this winter are really giving my grass a kick in the pants. I've been battling weed issues for over 2 years now and finally have the upper hand.
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Good morning wxlogic.
Member Since: Aprile 8, 2010 Posts: 15 Comments: 2572
Good Morning...
Member Since: Agosto 14, 2008 Posts: 4 Comments: 5031
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Quoting Grothar:


Could this possibly be what might be over Florida Sunday?



That's the one.
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436. CyclonicVoyage 8:31 AM EDT on April 16, 2010

I am with you; gonna be pluggin the lawn with St. Augustine (I am in North Florida with lots of shade in the yard from the oak trees) this weekend but will need to keep watering....Wish some of that rain would make it up to the Big Bend sometime soon..........
Member Since: Agosto 8, 2006 Posts: 0 Comments: 9342
Quoting alexhurricane1991:
Hey bordonaro finally rain but i think the show will happen next week with the possibitlity of strong thunderstorms associated with a big pacific storm still some uncertainty but thats going to be the main event this is the appetizer!

Good morning everyone! Northern Europe is still a no fly zone. Well hopefully tomorrow things will return towards normal. Not looking good!

So far Spring has produced little/no severe weather, and not much rain either.

The Area Forecast Discussion for next weekend in the DFW area is pointing towards a powerful system, will wait a few days as models may change!
Member Since: Agosto 25, 2009 Posts: 20 Comments: 6785
Hey grothar yes thats whats going to be over us on sunday we could be looking at heavy rainfall for saturday night and all through sunday especially south of tampa.
Member Since: Aprile 8, 2010 Posts: 15 Comments: 2572
Hey bordonaro finally rain but i think the show will happen next week with the possibitlity of strong thunderstorms associated with a big pacific storm still some uncertainty but thats going to be the main event this is the appetizer!
Member Since: Aprile 8, 2010 Posts: 15 Comments: 2572
Rain for North TX, YEAH!
Member Since: Agosto 25, 2009 Posts: 20 Comments: 6785
Just read a comment to a NYT article, saying eruptions of Eyjafjallajokul usually trigger another volcano in the chain, Katla, and that Katla eruptions usually are followed by weather disruptions. Any data on this?
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Quoting Jeff9641:
A heavy rain event appears to be setting up across all of C and S FL late Saturday into Sunday. We really need to watch the models as some of them want to develope 1006 SFC Low SW of Tampa or Fort Myers and linger it there for 24 to 48 hours. Non tropical of course but this setup would result in very heavy rain across the penisula the the highest totals approaching 4 to 6". PAT rates 2 to 2.5" can be expected. Unfortunatly I don't think the rain will make to the Panhandle but well see as the low may move further north than anticipated.


Just laid sod last weekend. The rain last weekend and forecast this weekend is GRRRRRRRRRRREAT! As Tony The Tiger would say.

Does wonders for the water bill :-)


Morning All
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Hey keeperofthegate!
Member Since: Aprile 8, 2010 Posts: 15 Comments: 2572
X
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Tampa nws says that southwest florida will get the heaviest amount of rain because there in better moisture and instability there could be a few rumblers down in sarasota,fort myers areas sunday.
Member Since: Aprile 8, 2010 Posts: 15 Comments: 2572
SUNDAY...MDLS SHOW A M/U LEVEL DISTURBANCE MOVING EASTWARD ACROSS THE SOUTHERN HALF OF THE PENINSULA. THIS, COMBINED WITH INCREASED
AVAILABLE MOISTURE, WL RESULT IN A SIGNIFICANT INCREASE IN POPS. GFS IS VERY AGGRESSIVE WITH THIS FEATURE SHOWING RATHER IMPRESSIVE OMEGA
VALUES AND A BULL`S EYE OF VERY HEAVY PRECIP AFFECTING MAINLAND SOUTH FLORIDA. HOWEVER...BELIEVE THERE MAY BE CONVECTIVE FEEDBACK PROBLEMS WITH THE MODEL AND EVEN THOUGH WL MENTION THE POSSIBILITY
OF HEAVY RAIN...WL GO WITH LOWER PRECIP AMOUNT THAN THE MODEL IS CURRENTLY FORECASTING.
Miami NWS Discussion
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Quoting Jeff9641:
A heavy rain event appears to be setting up across all of C and S FL late Saturday into Sunday. We really need to watch the models as some of them want to develope 1006 SFC Low SW of Tampa or Fort Myers and linger it there for 24 to 48 hours. Non tropical of course but this setup would result in very heavy rain across the penisula the the highest totals approaching 4 to 6". PAT rates 2 to 2.5" can be expected. Unfortunatly I don't think the rain will make to the Panhandle but well see as the low may move further north than anticipated.


local weather guy was saying most of the rain would be south of Tampa. Do you think this is accurate or will we get soaked too?
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I see we may have some rain this weekend we need it here in tampa.
Member Since: Aprile 8, 2010 Posts: 15 Comments: 2572
Hey jeff good morning.
Member Since: Aprile 8, 2010 Posts: 15 Comments: 2572
Gooood friday morning evreyone!
Member Since: Aprile 8, 2010 Posts: 15 Comments: 2572
Good Morning Everyone!!!

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Quoting barbamz:
A radar picture of the craters as seen by Coast Guard Plane on April 15. Really doesn't look like a smiley.
...
Picture obviously had been reversed by the newspaper, so it looks more scary. lol.


Haha, that is one creepy photo!
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Good Morning,

Our youth group just got back from a trip to Mississippi where they pulled a house out of the marsh bucket by bucket.
Katrina folks are not forgotten. I hope the new normal has hopeful aspects.
Member Since: Dicembre 28, 2006 Posts: 115 Comments: 1592
Lightnings are picking up as well.


http://andvari.vedur.is/athuganir/eldingar/vikan_is.html

I'm out. Nice day to all of you.
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A radar picture of the craters as seen by Coast Guard Plane on April 15. Really doesn't look like a smiley.

Taken from: http://www.icelandreview.com/icelandreview/daily_news/?cat_id=28304&ew_0_a_id=360867
Picture obviously had been reversed by the newspaper, so it looks more scary. lol.
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Good morning everybody. Calm sky above me. No flights in Frankfurt and elsewhere. New series of earthquakes just startet at the iceland volcano.



Link
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Quoting stormwatcherCI:
You are 100 % correct. Michelle did a job on WB, Gilbert did a job on EE and Ivan did a job on everyone. You are also right in saying some people still are not back to normal. What about the ones still living in the trailers ?


Sounds like around here. First we said before/after the hurricane, then it was before/after Rita or Humberto. After Ike we just don't try. Lol. Rita came at us one way. Humberto came at us the other way. And Ike just came at everyone. There's a tree leaning and chained up to another tree that was there before Humberto. That must be from Rita. Lol. That may seem weird but I know how long it took to get tree people to come out. We lost track of how long the blue roofs have been up.

Me and hubby took a trip down memory lane today. Spent the afternoon cleaning insulation and sheet rock off his Dallas Cowboy collectibles. That I climbed thru the window and under the roof and wall that was under the tree to get at. That was after Rita. So yeah it does take a while to get back to normal. But then again normal seems to change quite a bit around here. :)
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I learned from the best!
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One more ?. Has anyone invested in a portable battery digital T.V.? If so, what deals did you find?
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good night
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Quoting Grothar:


It is late, and most people aren't interested, but here is a link to a very important bit of info on taping windows, during hurricanes. The result. Don't do it.

Link


I want original rollladens, not the add-on designs. Wish someone would desing a version that would work with American style construction.
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Jeff co-founded the Weather Underground in 1995 while working on his Ph.D. He flew with the NOAA Hurricane Hunters from 1986-1990.

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