omi_no2_column_years2011to2015rdfs:seeAlso"N. A. Krotkov et al.: Aura OMI observations of regional SO2 and NO2 pollution changes; Atmos. Chem. Phys., 16, 4605–4629, 2016; www.atmos-chem-phys.net/16/4605/2016/ "The OMI standard NO2 product (OMNO2 v2.1) is publicly available from the NASA Goddard Earth Sciences (GES) Data and Information Services Center (DISC) at http://disc.sci.gsfc.nasa.gov/Aura/data-holdings/OMI/omno2_v003.shtml.""(xsd:string)