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大气科学  2013 

西太平洋地区大气边界层内臭氧的季节变化及其影响因子分析

DOI: 10.3878/j.issn.1006-9895.2013.12196

Keywords: O3,季节分布,气象因子,NO2,大气边界层

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Abstract:

利用臭氧探空资料,分析了西太平洋地区香港(HongKong)、那霸(Naha)和札幌(Sapporo)三个站点2000~2010年期间大气边界层内臭氧(O3)的季节分布和年变化趋势。结果表明,三个站点O3的季节分布存在明显的差异。其中,那霸和香港大气边界层内O3季节平均呈双峰值分布,其峰值分别出现在春季和秋季;而札幌站为单峰分布,峰值出现在春季。造成季节分布差异的主要原因包括人为污染源和自然因素如气象条件。另外,三个站点大气边界层内O3均呈上升趋势。其中札幌、那霸上升最快,分别达0.80ppba-1和0.77ppba-1。(ppb表示10-9,下同)香港的年际增长较不明显,但秋季增长却非常明显,高达1.21ppba-1。结合GOME(GlobalOzoneMonitoringExperiment)和SCIAMACHY(ScanningImagingAbsorptionSpectroMeterforAtmosphericChartography)卫星反演的NO2数据发现,过去10年中国京津唐和东北地区的对流层内NO2柱总量增加极为迅速。这些O3前体物通过远距离输送是导致札幌、那霸O3浓度增加的主要原因之一。珠江三角洲人为污染源的增加及偏北气流的影响,是导致香港地区秋季O3增加的主要原因。

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