Momenteel is het toch relatief rustig wat betreft vulkaanactiviteit van dergelijke omvang.
Maar je kan je wel voorstellen dat er zo geen 3 tegelijk moeten uitbarsten om serieuze atmosferische veranderingen te veroorzaken op wereldwijde schaal.
What Made 1816 So Cold?
The meteorological facts of life during 1816 have been laid out. The period March to September was marked by a series of strong and frequent invasions of dry arctic air across New England. While the movement of arctic air masses through this region is not uncommon in other seasons, their appearance in the summer as cold and frequent as in 1816 is indeed unusual. The question arises, why? Various theories have been put forward.
The most likely cause was volcanic influences. Proponents note that a number of major volcanic eruptions preceded 1816: Soufriére and St. Vincent in 1812: Mayon and Luzon in the Phillippines during 1814; Tambora in Indonesia during 1815. The volcanic theory of climatic influence relates increased volcanic activity with decreased temperatures due to the increased reflection of solar radiation from volcanic dust blown and trapped high in the atmosphere. The Tambora eruption has been estimated to be the most violent in historical times. The explosion is believed to have lifted 150 to 180 cubic kilometres of material into the atmosphere. For a comparison, the infamous 1883 eruption of Krakatau ejected only 20 cubic kilometres of material into the air, and yet it affected sunsets for several years after.
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