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- Title
One year of Sentinel-5P TROPOMI nitrogen dioxide observations.
- Authors
Eskes, Henk; van Geffen, Jos; Boersma, Folkert; Sneep, Maarten; Linden, Mark ter; Eichmann, Kai-Uwe; Veefkind, Pepijn
- Abstract
The TROPOspheric Monitoring Instrument (TROPOMI) is a spectrometer measuring in the UV, visible, near-infrared and short-wave infrared, which allows the retrieval of trace gas species like O3, NO2, HCHO, SO2, CO, CH4 and aerosol aspects like the aerosol index. The Copernicus Sentinel-5P satellite, with TROPOMI as payload, was successfully launched on 13 October 2017. TROPOMI has a full global coverage each day, but with a much-improved resolution (3.5 x 7 km2) compared to the Ozone Monitoring Instrument (OMI) which is providing measurements since 2004. Because of the fine resolution, the TROPOMI observations are expected to be of great importance for estimating pollutant concentrations and emissions at the scale of smaller towns, individual power plants, wildfires and major infrastructures. Operational data products, including NO2, have become available July 2018 (doi: 10.5270/S5P-s4ljg54). The Nitrogen Dioxide (NO2) tropospheric columns are retrieved using the DOAS algorithm combined with an integrated modelling-retrieval-assimilation approach to derive the air-mass factors and to estimate the stratospheric column. This latter component is based on the TM5-MP chemistry-transport model operated at a resolution of 1x1 degree. Developments from the EU QA4ECV project (www.qa4ecv.eu) have been included in the retrieval software to ensure consistency with the datasets from this project, including OMI NO2. More information can be found at http://www.tropomi.eu/data-products/nitrogen-dioxide.In our contribution we will provide an overview of the TROPOMI NO2 retrieval with a focus on recent developments and plans. An assessment of the quality of the NO2 product will be provided, and the stability of the NO2 product since launch will be reported. Comparisons will be presented with surface remote sensing observations (e.g. MAX-DOAS), the OMI QA4ECV NO2 products, and with CAMS global and regional air quality models. At the time of the EGU, TROPOMI will have accumulated a full year of nearly continuous observations (April 2018 - March 2019). The benefits of the high-resolution TROPOMI NO2 observations for the monitoring of sources and air quality will be demonstrated.
- Subjects
NITROGEN dioxide; AIR quality monitoring; TRACE gases; TROPOSPHERIC ozone; OZONE layer; AIR quality; SMALL cities
- Publication
Geophysical Research Abstracts, 2019, Vol 21, p1
- ISSN
1029-7006
- Publication type
Article