Near cities, and in regions like South-East Asia, where people are clearing vegetation byburning it, soot is expected. But as Angela Marinoni of the Institute of Atmospheric Sciencesand Climate in Bologna explained to an audience at the 2nd Third Pole Environment Workshopin Kathmandu on October 27th, the high Himalayas are also under an onslaught from this sortof pollution. Even at altitudes above 5,000 metres , soot is widespread. Andwhen it lands on glaciers it accelerates their melting.
在城市附近和像在东南亚这些地区,人们烧毁植被,因此就产生了烟灰。但是10月27日在加德满都举行的第二次第三极环境研讨会上,但是来自波隆纳的Angela Marinoni??一位大气物理学及气候研究所的研究人员对一名观众解释到: 喜马拉雅山也受到了这种烟灰的污染 .即使在海拔高于5000米的地区也弥漫着烟灰,当它们飘落到了冰川上,就会加速冰川的融化。
Dr Marinoni and her colleagues have been examining Himalayan soot since 2006. In thatyear the Nepal Climate Observatory - Pyramid, in the Khumbu valley, began a full-time studyof aerosol particles, soot among them. The researchers initial intention was to takeadvantage of what they assumed would be the pristine conditions found at such highaltitude to measure typicalbackground conditions of the atmosphere. Instead, they were surprised to find a thick haze,loaded with soot, smothering the mountain slope. In the rainless pre-monsoon monthsbetween January and May, about one day in five saw the Khumbu valley blanketed in a densebrown cloud.
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