We estimate annual ground-level nitrogen dioxide (NO2) concentrations for 2019 by combining satellite NO2 column observations from TROPOMI with information from the GEOS-Chem chemical transport model and ground-based monitoring. Estimates are provided at ~1 km resolution.
https://zenodo.org/record/5484305#.YesGadHMJaQ
We also produce annual mean estimates for 2005-2019 by combining fine-resolution (~1km) information from the TROPOMI satellite instrument with long-term NO2 observations from the OMI satellite instrument.
https://zenodo.org/record/5424752#.YesGatHMJaQ
Reference: Cooper, M.J., Martin, R.V., Hammer, M.S. et al. Global fine-scale changes in ambient NO2 during COVID-19 lockdowns. Nature 601, 380–387 (2022). [Link]
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Annual mean ground-level NO2 mixing ratio for 2019 inferred from the TROPOMI satellite instrument.
Reference:
Cooper, M.J., R.V. Martin, C.A. McLinden, and J.R. Brook (2020), Inferring ground-level nitrogen dioxide concentrations at fine spatial resolution applied to the TROPOMI satellite instrument, Env. Res. Lett., DOI:10.1088/1748-9326/aba3a5. [Link]
Available Datasets (Mean NO2 Product v.1)
Annual mean NO2 mixing ratio at TROPOMI overpass time (~13:00) in HDF5 format. Included is 2019 annual mean and 1.5 year mean spanning July 2018 – December 2019.
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Annual mean ground-level NO2 mixing ratio for 1996-2012 inferred from the GOME, SCIAMACHY, and GOME-2 satellite instruments.
References:
Geddes, J. A., R.V. Martin, B. L. Boys, and A. van Donkelaar, Long-term trends worldwide in ambient NO2 concentrations inferred from satellite observations for exposure assessment, Environ. Health Perspec., DOI:10.1289/ehp.1409567, 2015 [Link]
Available Datasets (Mean NO2 Product v.1.00):
3-Yr Running Mean NO2 Product v.1.00: Annual ground-level NO2 mixing ratio ~9:30-11:30 overpass time, in [ascii] and [hdf] format.
Annual ground-level NO2 mixing ratio ~9:30-11:30 overpass time, in [hdf] format.
Surface NO2 (OMI, 2005-2007)Annual mean ground-level NO2 mixing ratio at OMI overpass time (~1:30 PM) for 2005-2007 inferred from the OMI satellite instrument.
References:
Lamsal, L.N., R.V. Martin, A. van Donkelaar, E.A. Celarier, R.K. Boersma, R. Dirksen, C. Luo, and Y. Wang, 2010. Indirect validation of tropospheric nitrogen dioxide retrieved from the OMI satellite instrument: Insight into the seasonal variation of nitrogen oxides at northern midlatitudes, J. Geophys. Res., 115, D05302, doi:10.1029/2009JD013351
Lamsal, L.N., R.V. Martin, A. van Donkelaar, M. Steinbacher, E.A. Celarier, E. Bucsela, E.J. Dunlea, and J.P. Pinto, Ground-level nitrogen dioxide concentrations inferred from the satellite-borne Ozone Monitoring Instrument (OMI), J. Geophys. Res., 113, D16308, doi:10.1029/2007JD009235, 2008.
Available Datasets (SP_GC product_v1.00):
Annual (and long-term) mean (2005-2011) ground-level NO2 mixing ratio at OMI overpass time (~1:30 PM) for North America, in [ascii] and[hdf] format
Available Datasets (SP_GC product_v1.01):
Annual (and long-term) mean (2005-2011) ground-level NO2 mixing ratio at OMI overpass time (~1:30 PM) for North America, in [ascii] and[hdf] format
Instructions are in the README file [download README]
Available Datasets (DP_GC product):
Annual mean ground-level NO2 mixing ratio at OMI overpass time (~1:30 PM) for North America, 2005-2007 [.dat]
Annual Global Mean mean ground-level NO2 mixing ratio at OMI overpass time (~1:30 PM), 2005-2007 [.hdf]
Format:
North America Annual mean data are provided in an ASCII file. The first row/column indicate longitude/latitude centres, respectively. Missing values or water are denoted by -999. Global annual mean data is provided in HDF format.