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Validation of OMI tropospheric NO2column densities using direct-Sun mode Brewer measurements at NASA Goddard Space Flight Center
- Source :
- Journal of Geophysical Research. 113
- Publication Year :
- 2008
- Publisher :
- American Geophysical Union (AGU), 2008.
-
Abstract
- [1] This paper presents a comparison of NO 2 data measured with the Ozone Monitoring Instrument (OMI) on board the EOS-AURA satellite with ground-based direct-Sun Brewer measurement data. Since its deployment in July 2004, OMI has provided more than 2 years of daily high-resolution (∼13 x 24 km 2 at nadir) NO 2 vertical column density maps. We describe the retrieval, which includes an estimation of the stratospheric and tropospheric fraction of total NO 2 columns, the air mass factor (AMF) correction based on detected tropospheric NO 2 enhancements, and the generation of the gridded data product. We present a validation study of the gridded NO 2 data set using data from a Brewer MK3 double monochromator in direct-Sun mode located at NASA Goddard Space Flight Center in Greenbelt, Maryland, USA. Monthly averages of coinciding measurements correlate well (r = 0.9) but OMI data are about 25% lower than the Brewer measurement data (slope 0.75, intercept -0.38 x 10 15 molecules/cm 2 ). We present a detailed uncertainty analysis for both ground and satellite data and discuss the possible reasons for the observed differences.
- Subjects :
- Ozone Monitoring Instrument
Atmospheric Science
Ecology
Meteorology
Instrumentation
Paleontology
Soil Science
Forestry
Aquatic Science
Oceanography
Troposphere
Data set
Geophysics
Space and Planetary Science
Geochemistry and Petrology
Earth and Planetary Sciences (miscellaneous)
Nadir
Environmental science
Satellite
Stratosphere
Air mass
Earth-Surface Processes
Water Science and Technology
Remote sensing
Subjects
Details
- ISSN :
- 01480227
- Volume :
- 113
- Database :
- OpenAIRE
- Journal :
- Journal of Geophysical Research
- Accession number :
- edsair.doi...........4cc5b854fb5c333a08f43db4e36638e3