Is Katla finally going to BLOW?

[Papa Lazarou]

Volcanoes contribute both a cooling and a warming effect... below wxplains, and is borrowed from the web, as I don't have time to write it all out from scratch.

Warming

Volcanic eruptions can enhance global warming by adding CO2 to the atmosphere. However, a far greater amount of CO2 is contributed to the atmosphere by human activities each year than by volcanic eruptions. The small amount of global warming caused by eruption-generated greenhouse gases is offset by the far greater amount of global cooling caused by eruption-generated particles in the stratosphere (the haze effect)

Haze

Volcanic eruptions enhance the haze effect to a greater extent than the greenhouse effect, and thus they can lower mean global temperatures. It was thought for many years that the greatest volcanic contribution of the haze effect was from the suspended ash particles in the upper atmosphere that would block out solar radiation. However, these ideas changed in the 1982 after the eruption of the Mexican volcano, El Chichon. Although the 1980 eruption of Mt. St. Helens lowered global temperatures by 0.1OC, the much smaller eruption of El Chichon lowered global temperatures three to five times as much. Although the Mt. St. Helens blast emitted a greater amount of ash in the stratosphere, the El Chichon eruption emitted a much greater volume of sulfur-rich gases (40x more). It appears that the volume of pyroclastic debris emitted during a blast is not the best criteria to measure its effects on the atmosphere. The amount of sulfur-rich gases appears to be more important. Sulfur combines with water vapor in the stratosphere to form dense clouds of tiny sulfuric acid droplets. These droplets take several years to settle out and they are capable to decreasing the troposphere temperatures because they absorb solar radiation and scatter it back to space.

so, if this was a sulphur rich eruption we would see an immediate haze effect dropping global temps. The northern hemisphere would be more significantly effected, due to proximity and the small mixing from north to south.

 

[Tom Hark Preston Park]

Could spell bad news for the future of Amex Saturday 3pm kick-offs.

 

[Papa Lazarou]

Another thing to consider is the volumes of fresh water this would release ('billions of gallons' is quoted) will contribute to the weakening of the Thermo Haline Circulation, which drives the Gulf Stream, which keeps our part of the world several degress warmer than similar latitudes.

Due to increases in meltwater from the pole this has shown signs of weakening over recent years already, and some scientists believe that there is a tipping point within the system at which the process would basically shut down (probably temporarily). Were this to happen we'd experience far more severe winters here, with the warming sea water no longer being pumped up from the Gulf of Mexico.

Food for thought..

 

[Badger]

Another thing to consider is the volumes of fresh water this would release ('billions of gallons' is quoted) will contribute to the weakening of the Thermo Haline Circulation, which drives the Gulf Stream, which keeps our part of the world several degress warmer than similar latitudes.

Due to increases in meltwater from the pole this has shown signs of weakening over recent years already, and some scientists believe that there is a tipping point within the system at which the process would basically shut down (probably temporarily). Were this to happen we'd experience far more severe winters here, with the warming sea water no longer being pumped up from the Gulf of Mexico.

Food for thought..

Yeah I've seen "The Day After Tomorrow" too.

 

[Papa Lazarou]

Yeah I've seen "The Day After Tomorrow" too.

Well, the day after tomorrow is loosely based upon the 1970s book 'The Sixth Winter' which is based upon the theory that were we to get snow cover remaining in certain parts of the globe for 6 years in a row the reflection of sunlight would cause a feedback loop to develop and you'd be straight into a ice age.

The Day after Tomorrow brought that up to date and used a more recent concern, even if it did screw with the science and accelerate things ridiculously.

 

[Badger]

The Day after Tomorrow brought that up to date and used a more recent concern, even if it did screw with the science and accelerate things ridiculously.

What do you mean? A storm that engulfs the entire Northern Hemisphere forming within a few days and people instantly freezing to death, what's not to believe?

 

[Notters]

According to some, it will COOL the Earth - Katla: Icelandic Volcano Could Change Global Climate, According To BBC Report

Only temporarily though - we'd effectively have a nuclear winter for a few years with snow and ice and not being able to grow any crops, then exagerrated global warming afterwards.

 

[seven stands]

Whats the chance of the worst case happening 50/50 ?

 

[Driver8]

It's being mooted that as Iceland straddles the North Atlantic Ridge (fault line), the consequence of Katia blowing could be the island being split in two and sinking beneath the waves, a bit like Atlantis.

Serve the fuckers right for not paying us back after we bailed out the savers in their banks.

 

[Gazwag]

Only temporarily though - we'd effectively have a nuclear winter for a few years with snow and ice and not being able to grow any crops, then exagerrated global warming afterwards.

All those mugs with solar panels on their roofs won't half be annoyed

 

[Husty]

According to some, it will COOL the Earth - Katla: Icelandic Volcano Could Change Global Climate, According To BBC Report

That's a short term effect, and certainly no better for us, less sun reaching the earth isn't a good thing. Long term, the vast quantities of CO2 and other gasses in the atmosphere would lead to a warming effect.

 

[blue2]

were all doomed

 

[CHAPPERS]

[yt]aXwzSPc0FoA[/yt]

 

[looney]

I think it would be GOOD, in that the mahoosive ash cloud will send the rays of the sun back from whence they came.

(I'm guessing)

This is correct major eruptions can lower global average tempretures which upsets the global warmists because it dents their projections.

 

[Icy Gull]

That should push a few airlines over the brink