NOx Emission Reduction and Recovery during COVID-19 in East China

@article{Zhang2020NOxER,
  title={NOx Emission Reduction and Recovery during COVID-19 in East China},
  author={Ruixiong Zhang and Yuzhong Zhang and Haipeng Lin and Xu Feng and Tzung‐May Fu and Yuhang Wang},
  journal={Atmosphere},
  year={2020},
  volume={11},
  pages={433}
}
Since its first confirmed case at the end of 2019, COVID-19 has become a global pandemic in three months with more than 1.4 million confirmed cases worldwide, as of early April 2020. Quantifying the changes of pollutant emissions due to COVID-19 and associated governmental control measures is crucial to understand its impacts on economy, air pollution, and society. We used the WRF-GC model and the tropospheric NO2 column observations retrieved by the TROPOMI instrument to derive the top-down… Expand

Figures and Tables from this paper

Substantial nitrogen oxides emission reduction from China due to COVID-19 and its impact on surface ozone and aerosol pollution
A top-down approach was employed to estimate the influence of lockdown measures implemented during the COVID-19 pandemic on NO x Expand
Changes in China's anthropogenic emissions during the COVID-19 pandemic
The COVID-19 pandemic lockdowns led to a sharp drop in socio-economic activities in China in 2020, including reductions in fossil fuel use, industry productions, and traffic volumes. The short-termExpand
NOx Emissions Reduction and Rebound in China Due to the COVID‐19 Crisis
TLDR
The reduction in both emissions and concentrations shows a similar timeline consisting of a sharp reduction around the Spring festival and a slow recovery from mid-February to mid-March. Expand
Atmospheric Impacts of COVID-19 on NOx and VOC Levels over China Based on TROPOMI and IASI Satellite Data and Modeling
China was the first country to undergo large-scale lockdowns in response to the pandemic in early 2020 and a progressive return to normalization after April 2020. Spaceborne observations ofExpand
Responses of decline in air pollution and recovery associated with COVID-19 lockdown in the Pearl River Delta
TLDR
It is elucidate that more effective emission control strategies should be implemented in PRD to alleviate the increasingly serious pollution situation and indicate that changes in PPM concentration were more sensitive to emissions reduction. Expand
Impacts of the COVID-19 event on the NOx emissions of key polluting enterprises in China
TLDR
COVID-19 significantly reduced the NOx emission levels of the key polluting enterprises in China, and among all industrial sectors, the mining industry, manufacturing industry, power, heat, gas, and water production and supply industry, and the wholesale and retail industry were the most heavily influenced. Expand
The impacts of COVID-19, meteorology, and emission control policies on PM2.5 drops in Northeast Asia
TLDR
The influence of reductions in anthropogenic emissions was greater than that of meteorological conditions and emission policies during COVID-19 period and the influence on PM2.5 concentration differs across time and region and according to meteorological Conditions and emission control policies. Expand
Changes in China's anthropogenic emissions and air quality during the COVID-19 pandemic in 2020
TLDR
The anthropogenic air pollutant emissions from mainland China are reported by using a bottom-up approach based on the near-real-time data in 2020 and use the estimated emissions to simulate air quality changes with a chemical transport model. Expand
Global Changes in Secondary Atmospheric Pollutants During the 2020 COVID‐19 Pandemic
Abstract We use the global Community Earth System Model to investigate the response of secondary pollutants (ozone O3, secondary organic aerosols SOA) in different parts of the world in response toExpand
Highly Resolved Dynamic Emissions of Air Pollutants and Greenhouse Gas CO2 during COVID-19 Pandemic in East China
  • Cheng Huang, Jingyu An, +14 authors Hang Su
  • Medicine
  • Environmental Science & Technology Letters
  • 2021
TLDR
An approach to estimate city-level high resolution dynamic emissions of both anthropogenic air pollutants and CO2 by introducing dynamic temporal allocation coefficients based on real-time multisource activity data is constructed. Expand
...
1
2
3
4
5
...

References

SHOWING 1-10 OF 50 REFERENCES
Detection from space of a reduction in anthropogenic emissions of nitrogen oxides during the Chinese economic downturn
Abstract. Rapid economic and industrial development in China and relatively weak emission controls have resulted in significant increases in emissions of nitrogen oxides (NO x ) in recent years, withExpand
Reduction in NO(x) emission trends over China: regional and seasonal variations.
TLDR
A number of factors, including emission control measures of thermal power plants, increased hydro-power usage, vehicle emission regulations, and closure or migration of high-emission industries, have significantly reduced or even reversed the increasing trend of NOx emissions in more economically developed megacities and southern coastal regions. Expand
Temporal Analysis of OMI-Observed Tropospheric NO2 Columns over East Asia during 2006–2015
The study analyzed temporal variations of Ozone Monitoring Instrument (OMI)-observed NO2 columns, interregional correlation, and comparison between NO2 columns and NOx emissions during the periodExpand
Effect of changing NOx lifetime on the seasonality and long-term trends of satellite-observed tropospheric NO2 columns over China
Abstract. Satellite observations of tropospheric NO2 columns are extensively used to infer trends in anthropogenic emissions of nitrogen oxides (NOx ≡ NO + NO2), but this may be complicated by trendsExpand
An inventory of gaseous and primary aerosol emissions in Asia in the year 2000
[1] An inventory of air pollutant emissions in Asia in the year 2000 is developed to support atmospheric modeling and analysis of observations taken during the TRACE-P experiment funded by theExpand
Anthropogenic emissions of NOx over China: Reconciling the difference of inverse modeling results using GOME-2 and OMI measurements
Inverse modeling using satellite observations of nitrogen dioxide (NO2) columns has been extensively used to estimate nitrogen oxides (NOx) emissions in China. Recently, the Global Ozone MonitoringExpand
Trend and Interannual Variability of Chinese Air Pollution since 2000 in Association with Socioeconomic Development: A Brief Overview
Abstract Chinese air pollution has increased in this century along with the rapid socioeconomic development and resulting anthropogenic emissions. While recent emission control measures have shownExpand
Effect of changing NOx lifetime on the seasonality and long-term trends of satellite-observed tropospheric NO2 columns over China
Abstract. Satellite observations of tropospheric NO2 columns are extensively used to infer trends in anthropogenic emissions of nitrogen oxides ( NO x ≡ NO + NO 2 ), but this may be complicated byExpand
Assimilated inversion of NOx emissions over east Asia using OMI NO2 column measurements
[1] Assimilated inversion on a daily basis using OMI tropospheric NO2 columns is developed and applied in a regional chemical transport model (REAM) to constrain fossil fuel (FF) NOx emissions overExpand
Comparing OMI-based and EPA AQS in situ NO2 trends: towards understanding surface NOx emission changes
Abstract. With the improved spatial resolution of the Ozone Monitoring Instrument (OMI) over earlier instruments and more than 10 years of service, tropospheric NO2 retrievals from OMI have led toExpand
...
1
2
3
4
5
...