analysis of atmospheric pollution status over nanjing based on multi source detection CORD-Papers-2022-06-02 (Version 1)

Title: Analysis of Atmospheric Pollution Status over Nanjing Based on Multi-Source Detection
Abstract: Nanjing as one of the core cities in the Yangtze River Delta has developed industries and serious air pollution. In order to further study the pollution status in Nanjing MODIS and CALIPSO's aerosol products were used to analyze the aerosol characteristics of Nanjing from 2011 to 2019. Then four kinds of common reactive gases (SO2 NO NO2 and O3) in the atmosphere of Nanjing in winter were analyzed based on the data of ground-based reactive gas analyzer. The results shows that: (1) The AOD over Nanjing showed a downward trend in the whole nine years and the AOD could reach 0.7 in winter. The pollution degree was the highest in the four seasons. The aerosol was mainly composed of coarse particles and absorbent particles in winter. (2) The near surface atmosphere (within 2 km) of Nanjing was dominated by large particles and irregular particles. Mainly the proportion of fine particles and regular particles gradually increased within 2-6 km and the volume of particles changed little within 2-6 km. (3) Among the four common reactive gases in winter the (NO) in the atmosphere was the most significant and the maximum value was 16010-9 and the change trend of NO2 and O3 was opposite. Due to the emission limitation and the promotion of desulfurization measures and the influence of photochemical reaction the (SO2) was the lowest only about 310-9. Combined with OMI data the (NOx) over Nanjing remained at a low level in early 2020 due to the shutdown of factories because of COVID-19. Studies have shown that the particulate pollution in Nanjing has improved in recent years but it is still necessary to pay attention to the emission of coarse particles and it is necessary to strictly control the emission of gaseous pollutants from factories especially NOx. 2021 Editorial Board Research of Environmental Sciences. All right reserved.
Published: 2021
Journal: Research of Environmental Sciences
DOI: 10.13198/j.issn.1001-6929.2021.07.14
DOI_URL: http://doi.org/10.13198/j.issn.1001-6929.2021.07.14
Author Name: Zhang Y
Author link: https://covid19-data.nist.gov/pid/rest/local/author/zhang_y
Author Name: Zhou H
Author link: https://covid19-data.nist.gov/pid/rest/local/author/zhou_h
Author Name: Qiao H
Author link: https://covid19-data.nist.gov/pid/rest/local/author/qiao_h
Author Name: Xu J
Author link: https://covid19-data.nist.gov/pid/rest/local/author/xu_j
Author Name: Liu Y
Author link: https://covid19-data.nist.gov/pid/rest/local/author/liu_y
license: unk
license_url: [unknown license]
source_x: WHO
source_x_url: https://www.who.int/
who_covidence_id: #covidwho-1497976
url: https://doi.org/10.13198/j.issn.1001-6929.2021.07.14
has_full_text: FALSE
G_ID: analysis_of_atmospheric_pollution_status_over_nanjing_based_on_multi_source_detection