Abstract The estimates of anthropogenic CO 2 emissions in the megacity of St. Petersburg per square kilometer and for the entire area of the city (integral emissions), obtained on the basis of ground-based measurements of the CO 2 content within the city limits, are presented. To determine emissions, the inverse problem was solved using the results of comparison between the measured and calculated data (ODIAC dataset) of the anthropogenic contribution to the CO 2 content from the city. Two approaches were applied. In the first, the tomographic method was used and the anthropogenic emissions of three city districts per square kilometer were determined. In the second, all available measurements were used to find the average correction factor R and estimates of the integral CO 2 emissions of the entire megacity and its central part. The emissions per square kilometer for the south of the city are in the range of 32.7–48.3 kt/km 2 year; for the center, 69.0–97.5 kt/km 2 year; and for the north, 78.2 kt/km 2 year. The integral CO 2 emissions from the central part and the entire metropolis are 39.8 and 65.3 Mt/year, respectively. Inaccuracies in the estimate reach 20–40%. The estimates of the CO 2 anthropogenic emissions in St. Petersburg are higher by approximately two times than earlier results.

中文翻译：

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圣彼得堡特大城市二氧化碳人为排放的估计

摘要 根据对城市范围内 CO 2 含量的地面测量获得的圣彼得堡特大城市每平方公里和整个城市区域的人为 CO 2 排放量（整体排放量）的估计值，被提出。为了确定排放量，使用人为对城市 CO 2 含量的贡献的测量数据和计算数据（ODIAC 数据集）之间的比较结果解决了逆问题。应用了两种方法。首先，采用层析成像方法，确定了三个城区每平方公里的人为排放量。在第二个中，所有可用的测量值都用于找到平均校正因子 R 和整个特大城市及其中心部分的整体 CO 2 排放量的估计值。城市南部每平方公里的排放量在32.7-48.3 kt/km 2 年范围内；对于中心，69.0–97.5 kt/km 2 年；对于北方，78.2 kt/km 2 年。中心部分和整个大都市的整体CO 2 排放量分别为39.8 和65.3 Mt/年。估计的不准确率达到 20-40%。圣彼得堡的 CO 2 人为排放估计值比早期结果高出约两倍。