What's key in having volcanic eruptions affect the weather is both the duration of the eruption, and how high the ash gets blasted into the stratosphere, according to Hufford.

说如果Hufford仍持续的间断喷发的话，那么就值得我们担忧了。他称，火山爆发影响天气的关键因素是火山爆发期间和喷发到大气中的火山灰的高度。

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During the most recent eruption of Alaska's Mt. Redoubt, in 2009, "the volcano was going on and off for about three months," says Gary Hufford of NOAA's National Weather Service.

在2009年阿拉斯加redoubt山最近一次的喷发中，“这座火山陆陆续续地喷发了近三个月。”NOAA国家气象中心的Gary Hufford表示。

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