热带热带大气层臭氧和生物质燃烧
A M Thompson1, J C Witte, R D Hudson
1NASA-Goddard Space Flight Center, Code 916, Greenbelt, MD 20771, USA. anne.m.thompson@gsfc.nasa.gov
概括
新的方法揭示了印度尼西亚的火灾造成了臭氧羽毛到达印度,受到厄尔尼诺的影响. 对热层臭氧和烟雾气溶的分析显示了区域的变化,但在20世纪80年代没有明确的趋势.
科学领域:
- 大气科学 大气科学
- 遥感是一种远程传感.
- 臭氧层的研究研究.
背景情况:
- 热带层臭氧和吸收气溶对空气质量和气候产生重大影响.
- 了解它们的变化和趋势对于环境监测至关重要.
- 之前的研究已经探索了气溶,臭氧和气候现象 (如厄尔尼诺现象) 之间的联系.
研究的目的:
- 使用地球探测器总臭氧测绘光谱仪 (EP/TOMS) 数据,开发和应用新的方法来检索热层臭氧柱深度和吸收气溶 (烟雾和尘埃).
- 研究热层臭氧和气溶的跨年变化和趋势.
- 分析印度尼西亚大火和厄尔尼诺等重大事件对区域大气组成的影响.
主要方法:
- 利用来自EP/TOMS卫星数据的热层臭氧和吸收气溶的新检索算法.
- 分析了1997年8月至11月的数据,重点关注印度尼西亚的强烈火灾.
- 将EP/TOMS的发现与Nimbus 7 TOMS上世纪80年代的数据进行了比较,以分析趋势.
主要成果:
- 在1997年火灾期间,观察到明显的臭氧羽毛,与烟雾气溶脱,从印度尼西亚延伸到印度.
- 确定了与大气对厄尔尼诺现象和印度洋双极反应相关的区域臭氧增加.
- 尼布斯7TOMS数据显示了热层臭氧和烟雾气溶中的厄尔尼诺信号,但没有显示出20世纪80年代热层臭氧的显著趋势.
结论:
- 新的基于卫星的方法有效地追踪污染,并评估大气的变化.
- 大火事件可以产生广泛的臭氧污染,受到大规模气候模式的影响.
- 热带热带层臭氧的变化是由多种因素驱动的,烟雾和臭氧之间的季节性偏移表明了复杂的相互作用.
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