Preprints
https://doi.org/10.5194/egusphere-2022-1411
https://doi.org/10.5194/egusphere-2022-1411
 
15 Dec 2022
15 Dec 2022
Status: this preprint is open for discussion and under review for Atmospheric Chemistry and Physics (ACP).

The impact of inland ship emissions on air quality

Xiumei Zhang1,2, Ronald van der A1,2, Jieying Ding2, Xin Zhang1, and Yan Yin1 Xiumei Zhang et al.
  • 1KNMI-NUIST Center for Atmospheric Composition, Nanjing University of Information Science and Technology (NUIST), Nanjing 210044, China
  • 2Royal Netherlands Meteorological Institute (KNMI), Department of Satellite Observations, De Bilt, the Netherlands

Abstract. Despite the large number of domestic inland river vessels in China, information on inland river vessel emissions is very limited, because limited legislation exists for emission control and there is no monitoring infrastructure. Taking the Yangtze River in the region of Nanjing as research area, we compiled a ship emission inventory based on real-time information received from Automatic Identification System (AIS) signals and ship-related basic data provided by China Classification Society (CCS) database. The total estimated ship emissions in the Jiangsu section of the Yangtze River from September 2018 to August 2019 for NOx, SO2, PM10 and PM2.5 were 83.5, 41.8, 3.8 and 3.3 kton, respectively. These ship emissions were highest in the summer. From these estimates an inventory was constructed for ship emissions in the Yangtze River Delta (YRD) in Jiangsu. This ship emission inventory was compared with the Multi-resolution Emission Inventory for China (MEIC), the Shipping Emission Inventory Model (SEIM) and the satellite-derived emissions using the Daily Emissions Constrained by Satellite Observations (DECSO) algorithm. The result shows a consistent spatial distribution with riverine cities having higher NOx pollution than non-riverine cities. With this comparison we analyzed the relative impact of ship emissions on densely populated regions along the river. Inland ship emissions of NOx and SO2 are shown to contribute significantly, with each accounting for at least 40 %, to air pollution along the river.

Xiumei Zhang et al.

Status: open (until 11 Feb 2023)

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Xiumei Zhang et al.

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Short summary
We compiled a ship emission inventory based on Automatic Identification System signals in the Jiangsu section of the Yangtze River. This ship emission inventory was compared with Chinese bottom-up inventories and the satellite-derived emissions from TROPOMI. The result shows a consistent spatial distribution, with riverine cities having higher NOx emissions. Inland ship emissions of NOx and SO2 are shown to contribute with each at least 40 % to air pollution along the river.