 |
| Titel |
Tropospheric NO2 column observations from OMI: quantifying spatial and temporal resolution for evaluation of emissions and chemistry models |
| VerfasserIn |
R. C. Cohen, L. Valin, A. Russell |
| Konferenz |
EGU General Assembly 2009
|
| Medientyp |
Artikel
|
| Sprache |
Englisch
|
| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 11 (2009) |
| Datensatznummer |
250024927
|
|
|
|
|
|
| Zusammenfassung |
| The OMI (Ozone Monitoring Instrument) is capable of observing urban to regional scale variation in tropospheric NO2 column. We examine long term averages of the OMI data set to investigate issues of precision and accuracy along with spatial and temporal resolution. We demonstrate that 5-10 km resolution can be achieved by averaging 3 years of summertime observations. The effects of albedo and measurements of the N-S and E-W spatial resolution of the long-term average are quantified using observations over a salt flat in Nevada. Diurnal variation of the tropospheric NO2 column is observed by comparing average OMI observations at 1 and 1:25 PM (LST) over California and Nevada. The observed differences are compared to WRF-CHEM predictions and the effects of BRDF and the cloud retrieval on the patterns will be described. High resolution averages are applied to differentiate day-of-week patterns and trends for distinct regions California and compared to existing emission inventories. |
|
|
|
|
|