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Maritime NO x Emissions Over Chinese Seas Derived From Satellite Observations
Author(s) -
Ding J.,
A R. J.,
Mijling B.,
Jalkanen J.P.,
Johansson L.,
Levelt P. F.
Publication year - 2018
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1002/2017gl076788
Subject(s) - environmental science , satellite , inversion (geology) , china , pollution , climatology , meteorology , automatic identification system , ozone , atmospheric sciences , geography , geology , paleontology , ecology , archaeology , structural basin , aerospace engineering , engineering , biology , real time computing , computer science
By applying an inversion algorithm to NO x satellite observations from Ozone Monitoring Instrument, monthly NO x emissions for a 10 year period (2007 to 2016) over Chinese seas are presented for the first time. No effective regulations on NO x emissions have been implemented for ships in China, which is reflected in the trend analysis of maritime emissions. The maritime emissions display a continuous increase rate of about 20% per year until 2012 and slow down to 3% after that. The seasonal cycle of shipping emissions has regional variations, but all regions show lower emissions during winter. Simulations by an atmospheric chemistry transport model show a notable influence of maritime emissions on air pollution over coastal areas, especially in summer. The satellite‐derived spatial distribution and the magnitude of maritime emissions over Chinese seas are in good agreement with bottom‐up studies based on the Automatic Identification System of ships.