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首页> 外文期刊>Environmental Science & Technology >Magnitude, Decadal Changes, and Impact of Regional Background Ozone Transported into the Greater Houston, Texas, Area
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Magnitude, Decadal Changes, and Impact of Regional Background Ozone Transported into the Greater Houston, Texas, Area

机译：运往德克萨斯州大休斯敦地区的区域背景臭氧的大小，年代际变化及其影响

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摘要

Two independent analyses of the daily maximum 8 h average ozone concentrations measured during the high ozone season (May through October) at Continuous Ambient Monitoring Stations are used to quantify the regional background ozone transported into the Houston-Galveston-Brazoria (HGB) area. The dependence on wind direction is examined, and long-term trends are determined using measurements made between 1998 and 2012. Both analyses show that the regional background ozone has declined during periods of continental outflow: i.e., the conditions associated with most high ozone episodes in HGB. The changes in regional background ozone found for northeasterly and southeasterly flow are -0.50 ± 0.54 and -0.79 ± 0.65 (95% confidence limit) ppbv yr~(-1), respectively, which correspond to decreases of ～7-11 ppbv between 1998 and 2012. This finding is consistent with the summertime downward trend of -0.45 ppbv yr~(-1) (range of sites: -0.87 to +0.07 ppbv yr~(-1)) for ozone in the eastern U.S. between 1990 and 2010 reported by Cooper et al. and shows that changing background concentrations are at least partially responsible for the decreased surface ozone in the HGB area over the past decade. Baseline ozone concentrations in air flowing into Texas from the Gulf of Mexico have not changed significantly over this period.
机译：在连续环境监测站对高臭氧季节（5月至10月）期间测得的每日最大8小时平均臭氧浓度进行了两次独立分析，以量化运输到休斯敦-加尔维斯顿-布拉索里亚（HGB）地区的区域本底臭氧。考察了对风向的依赖性，并使用1998年至2012年之间的测量值确定了长期趋势。两项分析均表明，区域背景臭氧在大陆外流时期呈下降趋势，即与臭氧高发事件相关的条件。 HGB。东北和东南流的区域本底臭氧变化分别为-0.50±0.54和-0.79±0.65（95％置信限）ppbv yr〜（-1），对应于1998年之间〜7-11 ppbv的降低。和2012年。这一发现与1990年至2010年期间美国东部臭氧的夏季下降趋势-0.45 ppbv yr〜（-1）（位置范围：-0.87至+0.07 ppbv yr〜（-1））一致。由库珀等人报道。结果表明，过去十年来，背景浓度的变化至少部分是造成HGB地区地面臭氧减少的部分原因。在此期间，从墨西哥湾流入德克萨斯州的空气中的基准臭氧浓度没有显着变化。

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  • 来源
    《Environmental Science & Technology》 |2013年第24期|13985-13992|共8页
  • 作者

    Shaena R. Berlin; Andrew O. Langford; Mark Estes; Melody Dong; David D. Parrish;

  • 作者单位

    Chemical Sciences Division, NOAA ESRL , 325 Broadway R/CSD7, Boulder, Colorado 80305, United States,Department of Earth, Atmospheric and Planetary Sciences, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States;

    Chemical Sciences Division, NOAA ESRL , 325 Broadway R/CSD7, Boulder, Colorado 80305, United States;

    Texas Commission on Environmental Quality, 12100 Park 35 Circle, Austin, Texas 78753, United States;

    Chemical Sciences Division, NOAA ESRL , 325 Broadway R/CSD7, Boulder, Colorado 80305, United States,University of California, San Diego, CA;

    Chemical Sciences Division, NOAA ESRL , 325 Broadway R/CSD7, Boulder, Colorado 80305, United States;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
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