has any body factored in Krakatoa and its influuence on today's climate?

Question

As I recall, it was a hell of a blast that influenced the climate.

How much did it cool the earth by?

Quite a bit, so much so that today's global warming only makes up for the change that Krakatoa cooled us down by.

Hey, does that that we are not Gods and do not control the planet?

Answer 1

The effects of volcanoes are factored into the study of climate change and the subsequent observations and predictions.

Krakatoa was one hell of a blast, in the years preceeding the 1883 eruption average global temperatures were 13.93°C, in the immediate aftermath temps in some places fell by as much as 1.2°C and the global average temp the following year fell to 13.59°C. Within 5 years temps were more or less back to normal but it took the best part of 3 decades for the effects to fully dissipate (note 1).

Back then of course, greenhouse gas emissions were much less than they are now - about one tenth as much. If there were to be a similar magnitude eruption today it would only take 3 or 4 years for temperature levels to fully recover. This is what we saw following the eruption in 1991 of Mount Pinatubo, although smaller than Krakatoa (10bn tons of material ejected as opposed to 25bn tons) the effects were comparable.

The cooling effect of volcanoes is caused by the emissions of sulphur dioxide, this gas acts somewhat like a mirror in that it reflects solar radiation back into space. After undergoing a three stage chemical reaction in the atmosphere it forms sulphuric acid and falls back to earth as acid rain. (note 2). This causes defoiliation and deforestation which itself is a contributory factor to global warming.

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Note 1. Recent oceanographic research suggests that in the aftermath of Krakatoa the global cooling caused a cooling of the oceans surface, this denser colder water subsequently sank. It has been suggested that had it not been for Krakatoa, the deep oceans may be slightly warmer than they are now.

Note 2: SO2 reacts with water vapour to form sulphurous acid (H2SO3), this oxidises to form sulphur trioxide (SO3) which in turn reacts with water to form sulphuric acid (H2SO4).

Answer 2

Yes. Volcanic aerosols (and all other aerosols) are included in global climate models. Volcanic aerosols act to block light from the Sun from reaching the earth, and therefore cool the planet. The effect can be dramatic, but it is short lived: most volcanic aerosols are washed out of the atmosphere within two years of an eruption.

The global temperature may have been lowered by about 0.2° C in the year following the Krakatoa eruption, although the signal is very difficult to detect.

Answer 3

The effects of Krakatoa on a worldwide scahle were measurable--but they dissapated over a hundred years ago.

Answer 4

I already did this. I instructed a guy i'm seeing sturdy morning as we wakened interior a similar mattress. maximum heroic concern is to stay life and prefer it. not enable others to destroy it. this night we can carry palms, have dinner and do each and all the stuff we might want to do. No if actuality exchange into not in place it may be to take President Bush into the clicking room, then kiss this guy i admire in front of him.

Answer 5

We're pretty powerful. Here's the relative importance of various things affecting global warming, including volcanoes.

We're not all of it, but we're number one.

http://www.globalwarmingart.com/wiki/Image:Climate_Change_Attribution.png

Answer 6

You are confused and you are clutching on straws to justify your stupidity.Crack a toa only worsened things like you with your nonsense.

Answer 7

active volcanoes worldwide daily beat yearly output of the US in carbon emissions.

average mt. st.helens and mt erebus yearly emmisions. one blew it's top and one blows constantly.