Would such a large scale volcanic eruption like Krakatau effect global climate?

Answer 1

Yes, large volcanic eruptions affect global climate. I heard somewhere, but don't recall where, that the unseasonably long snow that bound the Donner Party in the Sierra Nevada Mountains was the result of a volcanic eruption elsewhere in the world earlier in the year.

Answer 2

Absolutely.

The main effect is a decrease in temperature caused by the dust, and by aerosols produced in the air blocking sunlight. In the case of something like Karkatau, the effect can last for a few years.

Most scientists think global warming in the 80s and early 90s was reduced by some major volcanic eruptions. So it may be much worse than we think.

More info:

http://www.geology.sdsu.edu/how_volcanoes_work/climate_effects.html

Answer 3

Yes it could. In fact, after large eruptions, we often see the most spectacular sunsets for months or even years afterwards as a result of the extra particles in the air. This can also cause changes in the way that heat and light move through the atmosphere.

Answer 4

yes very likely