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首页> 外文期刊>Asia-Pacific journal of atmospheric sciences >Evaluation of the Potential Use of Satellite-Derived XCO_2 in Detecting CO_2 Enhancement in Megacities with Limited Ground Observations: A Case Study in Seoul Using Orbiting Carbon Observatory-2
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Evaluation of the Potential Use of Satellite-Derived XCO_2 in Detecting CO_2 Enhancement in Megacities with Limited Ground Observations: A Case Study in Seoul Using Orbiting Carbon Observatory-2

机译：评估卫星衍生的XCO_2在具有有限地面观测的MEGACITICS中检测CO_2增强的潜在使用：使用轨道碳观察台-2中首尔的案例研究

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摘要

Exact assessment of urban atmospheric CO_2 enhancement, which is higher than background CO_2 concentrations, is critical to mitigate carbon emissions in the city. However, ground-based atmospheric CO_2 measurements covering the diverse landscape across the city are still limited. This study utilizes the column integrated CO_2 concentration (XCO_2) data obtained from the NASA Orbiting Carbon Observatory-2 (OCO-2) to evaluate urban CO_2 enhancements over Seoul Capital Area (SCA) of South Korea for the period 2014-2018. In this study, Jirisan National Park (JNP), which is the cleanest area on the same orbit track with SCA, is defined as the background area considering its strong vegetation activity and low anthropogenic carbon emissions. By comparing XCO_2 between SCA and JNP based on wind speed, we find an apparent increase in XCO_2 by 1.71 to 2.21 ppm over SCA only on the days with wind speed less than 4 m s~(-1). Strong wind speed (e.g., over 4 m s~(-1)) disrupts the identification of XCO_2 enhancements over SCA due to atmospheric mixing between SCA and JNP. In addition, we compare estimated XCO_2 differences between SCA and JNP from OCO-2 with other low-resolution data. This increase in XCO_2 over SCA is only observed in OCO-2. Overall, our results suggest that high-resolution satellite remote sensing of XCO_2 constrained by wind speed has strong potential to open up the possibility of identifying atmospheric CO_2 enhancements in the city where ground-based observations are limited.
机译：对城市大气CO_2增强的确切评估，高于背景CO_2浓度，对降低城市的碳排放至关重要。然而，覆盖整个城市各种景观的地面大气压CO_2测量仍然有限。本研究利用来自美国宇航局轨道碳观察台-2（OCO-2）获得的柱集成的CO_2浓度（XCO_2）数据，以评估韩国首尔资本领域的城市CO_2增强，于2014 - 2018年期间。在本研究中，Jirisan国家公园（JNP）是与SCA相同的轨道轨道上最清洁的区域，被定义为考虑其强大的植被活性和低人为碳排放的背景区域。通过基于风速比较SCA和JNP之间的XCO_2，我们发现XCO_2的表观增加1.71至2.21ppm，仅在速度小于4米S〜（-1）的日子上。强风速（例如，超过4米S〜（-1））扰乱了由于SCA和JNP之间的大气混合而通过SCA的识别XCO_2增强。此外，我们将SCA和JNP之间的估计XCO_2与其他低分辨率数据的估计与JNP之间的差异进行比较。在OCO-2中仅观察到SCA上的XCO_2的这种增加。总体而言，我们的结果表明，高分辨率卫星遥感因风速约束的XCO_2具有强大的潜力，可以开辟识别基于城市的大气的辅助CO_2增强功能的可能性。

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  • 来源
    《Asia-Pacific journal of atmospheric sciences》 |2021年第2期|289-299|共11页
  • 作者

    Chaerin Park; Sujong Jeong; Hoonyoung Park; Jeongmin Yun; Junjie Liu;

  • 作者单位

    Department of Environmental Planning Graduate School of Environmental Studies Seoul National University Seoul South Korea;

    Department of Environmental Planning Graduate School of Environmental Studies Seoul National University Seoul South Korea;

    Department of Environmental Planning Graduate School of Environmental Studies Seoul National University Seoul South Korea;

    School of Earth and Environmental Sciences Seoul National University Seoul South Korea;

    Jet Propulsion Laboratory California Institute of Technology Pasadena CA 91109 USA;

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  • 正文语种 eng
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  • 关键词

    Urban CO_2 enhancement; Satellite XCO_2; OCO-2; Urban carbon cycle; Megacity;

    机译：城市CO_2增强;卫星XCO_2;OCO-2;城市碳循环;兆特征;

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