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首页> 外文期刊>Atmospheric environment >Spatial and temporal variability of trace gas columns derived from WRF/Chem regional model output: Planning for geostationary observations of atmospheric composition
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Spatial and temporal variability of trace gas columns derived from WRF/Chem regional model output: Planning for geostationary observations of atmospheric composition

机译：从WRF / Chem区域模型输出得出的微量气柱的时空变化：大气成分的地球静止观测计划

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摘要

We quantify both the spatial and temporal variability of column integrated O-3, NO2, CO, SO2, and HCHO over the Baltimore/Washington, DC area using output from the Weather Research and Forecasting model with on-line chemistry (WRF/Chem) for the entire month of July 2011, coinciding with the first deployment of the NASA Earth Venture program mission Deriving Information on Surface conditions from Column and Vertically Resolved Observations Relevant to Air Quality (DISCOVER-AQ). Using structure function analyses, we find that the model reproduces the spatial variability observed during the campaign reasonably well, especially for O-3. The Tropospheric Emissions: Monitoring of Pollution (TEMPO) instrument will be the first NASA mission to make atmospheric composition observations from geostationary orbit and partially fulfills the goals of the Geostationary Coastal and Air Pollution Events (GEO-CAPE) mission. We relate the simulated variability to the precision requirements defined by the science traceability matrices of these space-borne missions. Results for O-3 from 0 to 2 km altitude indicate that the TEMPO instrument would be able to observe O-3 air quality events over the Mid-Atlantic area, even on days when the violations of the air quality standard are not widespread. The results further indicated that horizontal gradients in CO from 0 to 2 km would be observable over moderate distances (>20 km). The spatial and temporal results for tropospheric column NO2 indicate that TEMPO would be able to observe not only the large urban plumes at times of peak production, but also the weaker gradients between rush hours. This suggests that the proposed spatial and temporal resolutions for these satellites as well as their prospective precision requirements are sufficient to answer the science questions they are tasked to address. (C) 2015 Elsevier Ltd. All rights reserved.
机译：我们使用天气研究和预报模型的输出以及在线化学（WRF / Chem）的输出，对巴尔的摩/华盛顿特区的O-3，NO2，CO，SO2和HCHO色谱柱综合量的时空变化进行了定量分析在2011年7月的整个月中，与NASA Earth Venture计划任务的首次部署相一致，该任务从与空气质量有关的纵坐标和垂直分辨的观测值（DISCOVER-AQ）中获取地面状况信息。使用结构函数分析，我们发现该模型可以很好地重现战役期间观察到的空间变异性，尤其是对于O-3。对流层排放：污染监测（TEMPO）仪器将是NASA首次从对地静止轨道进行大气成分观测的任务，并部分实现对地静止沿海和空气污染事件（GEO-CAPE）任务的目标。我们将模拟的可变性与这些星载任务的科学可追溯性矩阵所定义的精度要求相关联。从0到2 km高度的O-3的结果表明，TEMPO仪器即使在违反空气质量标准的情况还不很普遍的日子里，也能够观察到大西洋中部地区的O-3空气质量事件。结果进一步表明，在中等距离（> 20 km）内，可以观察到CO从0到2 km的水平梯度。对流层NO2的时空结果表明，TEMPO不仅能够观察到高峰期时的大城市羽流，而且还能观察高峰时段之间较弱的梯度。这表明为这些卫星建议的时空分辨率及其预期的精度要求足以回答他们要解决的科学问题。 （C）2015 Elsevier Ltd.保留所有权利。

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