Chile’s Calbuco Eruption: Potential Weather Impacts

The article mentions Volcanic Winter. The most famous one is the year without summer, https://en.wikipedia.org/wiki/Year_Without_a_Summer, due to the Mt Tambora eruption in the dutch east indies.

"The Calbuco Volcano in Chile has erupted, spewing millions of dust and volcanic ash particles into the atmosphere and lower stratosphere."

Slight understatement, maybe? Probably thousands of tonnes, if not millions. The Eyjafjallajökull eruption released about 100 million cubic metres of airborne material[0]

[0]: http://en.wikipedia.org/wiki/2010_eruptions_of_Eyjafjallaj%C...

Are the weather and short lived climate impacts of major eruptions limited to that hemisphere? I would think that an eruption in Chile wouldn't have an impact on northern hemisphere climate. While there was global cooling after Pinatubo I assume the cooling was mostly limited to the northern hemisphere?