空气与雪的相互作用和大气化学
Florent Dominé1, Paul B Shepson
1CNRS, Laboratoire de Glaciologie et Géophysique de l'Environnement, B.P. 96, 54 Rue Molière, 38402 Saint Martin d'Hères cedex, France. florent@lgge.obs.ujf-grenoble.fr
Science (New York, N.Y.)
|August 31, 2002
概括
雪会改变极地空气的组成,增加大气氧化. 雪地反应会释放诸如基激素 (OH) 这样的化合物,影响空气质量和冰芯数据的解释.
科学领域:
- 大气化学 大气化学
- 极地科学 极地科学
- 雪包地质化学 雪包地质化学
背景情况:
- 雪地覆盖显著影响近地表面的极地空气组成.
- 高基 (OH) 度表明大气氧化能力提高.
研究的目的:
- 研究发生在雪罩中的化学转化及其对极地大气组成的影响.
- 了解雪中排放的化合物在大气化学中的作用.
主要方法:
- 分析积雪和间歇空气组成.
- 研究雪中的光解和反应过程.
- 检测排放的物种,包括氧化,化和素.
主要成果:
- 雪的存在扰乱了近地表的空气,增加了OH度和氧化能力.
- 雪中含有的酸盐离子的光解是主要的干扰源.
- 雪地反应产生和释放碳化合物和素.
结论:
- 积雪的化学成分显著改变了极地大气的组成.
- 雪的排放会影响上层大气和间隙空气.
- 冰芯分析需要对反应性物种进行修正,这是由于雪盖的影响.
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