量化COVID-19大流行封锁和与俄罗斯的武装冲突对乌克兰哨兵5P TROPOMI NO 2变化的影响

IF 4.2 3区 地球科学 Q1 COMPUTER SCIENCE, INFORMATION SYSTEMS
Anh Phan, Hiromichi Fukui
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引用次数: 0

摘要

这项研究调查了乌克兰在两个重要时期二氧化氮(NO2)水平的变化:2020年COVID-19大流行封锁和2022年与俄罗斯的武装冲突。原始和重新处理的Sentinel 5P数据产品用于分析。使用机器学习模型生成了一个照常营业的二氧化氮时间序列,该序列考虑了气象变化。对于乌克兰人口最多的九个城市,我们观察到,在2020年的封锁期间,与封锁前相比,封锁期间二氧化氮水平的增长有所放缓。从2022年冲突期间的同一月份来看,我们发现这些城市的二氧化氮水平下降幅度要大得多,原始数据集平均下降12.1%,重新处理数据集平均下降18.1%。除了对主要城市地区的考察外,我们还观察到,在被冲突破坏或摧毁的燃煤电厂周围地区,二氧化氮水平有所下降。对于乌克兰的主要城市地区,我们得出的结论是,与COVID-19封锁相比,冲突相关事件导致的日常人为活动变化对二氧化氮水平的影响更大。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Quantifying the impacts of the COVID-19 pandemic lockdown and the armed conflict with Russia on Sentinel 5P TROPOMI NO 2 changes in Ukraine
This study investigated variations in nitrogen dioxide (NO2) levels in Ukraine during two significant periods: the COVID-19 pandemic lockdown in 2020 and the armed conflict with Russia in 2022. Original and reprocessed Sentinel 5P data products were utilized for the analysis. A machine learning model was employed to generate a business-as-usual NO2 time series that accounted for meteorological variability. For the nine most populous cities in Ukraine, during the lockdown in 2020 we observed a moderation of increases in NO2 levels during the lockdown compared to the pre-lockdown levels. Looking at the same months during the conflict period in 2022, we identified much more significant reductions in NO2 level in these cities, averaging 12.1% for original and 18.1% for reprocessed datasets. Besides our examination of major urban areas, we observed reductions in NO2 levels in areas surrounding coal power plants damaged or destroyed by the conflict. For the major urban areas in Ukraine, we conclude that changes in daily anthropogenic activities due to the conflict-related events had more substantial impacts on NO2 levels than did COVID-19 lockdown.
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来源期刊
Big Earth Data
Big Earth Data Earth and Planetary Sciences-Computers in Earth Sciences
CiteScore
7.40
自引率
10.00%
发文量
60
审稿时长
10 weeks
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