One factor could be deposits of dust and black carbon (collectively called aerosols) upon the snow, which, up to an accumulation of 400 grams per square meter sharply raises the rate of melting.
雪上尘埃和黑炭（统称为气溶胶）覆层可能是其中一个因素：当覆层的积累达到每平方米400克的时候，会急剧加快融化的速度；
Squeeze full bobble of water through filter. Black dust will appear in first rinse. Don't worry, it's only carbon.
把水通过滤芯充实挤压漏接出来。第一次利用会有黑尘，请别担忧，这只是碳灰。
The production and use of carbon black workers, such as long-term sucked soot dust can produce carbon black pneumoconiosis.
生产和使用碳黑的工人，如长期吸人碳黑粉尘可发生碳黑尘肺。
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