RicS wrote (in more than one post):
I also think we have managed to wander well off the point. Global warming is a very short term thing.
actually there are two parts of global warming, the natural long term and the man made short term. the problem is that its difficult to tell the difference. many ppl like some here, choise to claim there is no natural warming and that man is completely responsible for both.
(previously)
...Currents are not particularly "sun driven". They arise because of heat transfer from the tropics to the high latitudes. The residual heat within the oceans is actually quite large...
im afraid that i dont see how you could say this and not see that the heat comes from the sun. yes the ocean has a large residual heat, but that heat comes from the sun. since the tropics get the lions share of the heat, that is where the heat builds up most. then the current heads north where it releases its heat, melting the ice, and warming the northern parts of the hemishere. then the denser (cooler) water drops and flows along the bottom to replace the water the is heated up by the sun. if the sun is blocked by dense clouds of sulpher dioxide ice, there is no heating of the ocean and after several months there is no room in the tropics for the colder water to replace, so it cant go any where after the and the heated water cant melt off ice and heat the northern areas. it does not take rocket science to understand this, but the theory involving upper atmospheric air rushing down to freeze the lower atmosphere has even rocket scientist arguing over it.
... That is why an eruption such as Tambora, which really did have a large chilling effect for well over a year, did not effect the currents, even though it occurred right in the middle of the "mini ice age".....
it only blasted a mere 40 cubic kilometers of rock and gas into the atmosphere. while the larger ones shoot hundreds of cubic miles (not sure what the compairison is but i believe miles are considerably bigger than kilometers)
... Mt St Helens, was a very high altitude eruption. The cloud had a cooling effect for around three years and it was at exactly the right latitude to effect the Atlantic currents, as was the Mexican eruption not long afterwards that was far less reported but actually had a larger climatic effect because of the gas mixture and the very high altitude release. I guess you could argue they weren't big enough but once again they had no effect other than very short term....
neither of them massed a single cubic mile of ash and material into the upper atmosphere. while most volcanos will put some into that region, the caldera volcanos send a very large porportion of their gas and a large amount of ash there.
you previously mention the volcano in japan, ive since have found it listed. it was a vei 7 not 8 like the major climate changers. you might have mentioned that.
...Volcanos can and will start the next ice age or deepen this one but it is likely this will happen outside human time frames. Similarly, a major meteor impact will do the same but they seem to happen with even less frequency than volcanic eruptions of major extinction level proportions....
the problem with this atitude is that its simular to the person who is playing russian rollet (sp?) and has seen the gun click 5 times in a row already. yes its only one in 6, but its already missed 5 times.
it might be 722000 years between eruptions of long valley, but its giving warnings now that it will erupt, and soon. same with the one in indonesa, and a third (name forgotten) on a island in the middle of the south pacific.
heres another analagy simular to yours. meteors big enough to destroy a city only strick the earth every 100000 years or so, but if one was seen to be on a colision course with the earth, would you claim that there was nothing to worry about because they only happened every 100000 years? we are like that, with the meteor having been spotted and known to be going to hit, but not where.
yes, it has little to do with global warming right at this moment, but it will very soon.
