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首页> 外文期刊>Journal of the air & waste management association >The Impact Of Background Ozone On Compliance With Revised National Ambient Air Quality Standards
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The Impact Of Background Ozone On Compliance With Revised National Ambient Air Quality Standards

机译：背景臭氧对符合修订的国家环境空气质量标准的影响

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The National Ambient Air Quality Standard (NAAQS) for ground-level ozone, previously set as an 8-hr average of 0.08 parts per million (ppm), has been revised by the U.S. Environmental Protection Agency (EPA). Historically, background concentrations originating from non-local sources were not considered to be a major constituent of ground-level ozone. However, previous research has shown that background ozone concentrations often exceed the new 8-hr NAAQS of 0.075 ppm, and that high background concentrations are particularly troublesome in the mid-latitudes. This study measured ozone at ground level and at 210 m above ground level in Tulsa, OK (36 °N, 96 °W), from June 1 to November 30, 2005. Background ozone concentrations as high as 0.05 ppm were recorded, and substantial variability was observed in conjunction with the polar jet stream and the seasonal influence of large-scale subtropical high pressure at the study location. Additionally, the highest observed background concentrations coincided with maximum photochemical generation at ground level. On the basis of the magnitude and variability of background ozone, a more stringent 8-hr ozone standard will be difficult for local or regional regulatory agenciesrnto meet. A clear understanding of the impacts of background ozone will be required to make and meet new State Implementation Plans (SIPs).
机译：美国环境保护局（EPA）已对地面臭氧的国家环境空气质量标准（NAAQS）进行了预先设定，将其8小时平均值设为百万分之0.08（ppm）。从历史上看，源自非本地来源的背景浓度不被认为是地面臭氧的主要成分。但是，先前的研究表明，背景臭氧浓度通常超过新的8小时NAAQS（0.075 ppm），而高背景浓度在中纬度地区尤其麻烦。这项研究于2005年6月1日至11月30日在俄克拉荷马州塔尔萨（36°N，96°W）处测量了地面上和地面以上210 m的臭氧。记录到的背景臭氧浓度高达0.05 ppm，在研究地点，结合极地喷射流和大规模副热带高压的季节影响观察到了变化。另外，观察到的最高本底浓度与地面上最大的光化学产生相吻合。根据背景臭氧的大小和变异性，地方或地区监管机构将难以达到更严格的8小时臭氧标准。要制定和满足新的国家实施计划（SIP），将需要对背景臭氧的影响有清楚的了解。

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