A large decline of tropospheric NO2 in China observed from space by SNPP OMPS Lin, Nan ; Wang, Yuxuan ; Zhang, Ying ; Yang, Kai Abstract Publication: Science of the Total Environment Pub Date: July 2019 DOI: 10.1016/j.scitotenv.2019.04.090 Bibcode: 2019ScTEn.675..337L