Inferring Ground-level Nitrogen Dioxide Concentrations From OMI
Abstract
Surface NO2 concentrations are strongly associated with mortality. We present an approach to infer ground- level NO2 concentrations using tropospheric NO2 columns from the OMI satellite instrument and NO2 profile shapes from a global chemical transport model (GEOS-Chem). The derived surface NO2 concentrations are compared with in situ NO2 data from 214 monitoring sites from the AQS/NAPS networks in the United States and Canada. Laboratory and field measurements are used to develop and test a correction algorithm for interference by reactive nitrogen in the in-situ ground- based measurements. The OMI derived ground-level NO2 data exhibit significant agreement with the corrected in situ measurements. This comparison not only demonstrates the capability of monitoring surface air quality from space but also serves as an indirect validation of the OMI tropospheric NO2 columns.
- Publication:
-
AGU Fall Meeting Abstracts
- Pub Date:
- December 2007
- Bibcode:
- 2007AGUFM.A54C..05L
- Keywords:
-
- 0345 Pollution: urban and regional (0305;
- 0478;
- 4251);
- 0365 Troposphere: composition and chemistry;
- 3360 Remote sensing