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An introduction to the ALERT 2000 and SUMMIT 2000 Arctic research studies

机译:关于ALERT 2000和SUMMIT 2000北极研究的简介

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摘要

The Arctic troposphere has been described as a unique chemical reactor, in which reactions that may have a significant impact on the global atmosphere occur. Its uniqueness is the result of a combination of several factors. It experiences a prolonged period of darkness, removing the usual energy source for atmo- spheric chemical cleansing (solar radiation), followed by a corresponding period of continuous light, when photochemistry is very active. Cold conditions fre- quently result in a very stable surface layer, although moderately unstable conditions often occur during summer. It is largely underlain by snow and ice, or by the Arctic Ocean, boundaries that provide surfaces or aerosols for active heterogeneous chemistry.
机译:北极对流层被描述为一个独特的化学反应堆,在其中发生了可能对全球大气产生重大影响的反应。它的独特性是多种因素共同作用的结果。当光化学非常活跃时,它将经历长时间的黑暗,除去用于大气化学清洗(太阳辐射)的常规能源,然后再经过相应的连续光周期。寒冷的天气通常会导致表层非常稳定,尽管夏季通常会出现中等程度的不稳定状况。它在很大程度上被雪,冰或北冰洋所包围,边界为活动的异质化学提供了表面或气溶胶。

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