Academic Journal
Observation of slant column NO2 using the super-zoom mode of AURA-OMI
| العنوان: | Observation of slant column NO2 using the super-zoom mode of AURA-OMI |
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| المؤلفون: | R. C. Cohen, E. J. Bucsela, J. P. Veefkind, L. C. Valin, A. R. Russell |
| المصدر: | Atmospheric Measurement Techniques, Vol 4, Iss 9, Pp 1929-1935 (2011) |
| بيانات النشر: | Copernicus Publications, 2011. |
| سنة النشر: | 2011 |
| المجموعة: | LCC:Environmental engineering LCC:Earthwork. Foundations |
| مصطلحات موضوعية: | Environmental engineering, TA170-171, Earthwork. Foundations, TA715-787 |
| الوصف: | We retrieve slant column NO2 from the super-zoom mode of the Ozone Monitoring Instrument (OMI) to explore its utility for understanding NOx emissions and variability. Slant column NO2 is operationally retrieved from OMI (Boersma et al., 2007; Bucsela et al., 2006) with a nadir footprint of 13 × 24 km2, the result of averaging eight detector elements on board the instrument. For 85 orbits in late 2004, OMI reported observations from individual "super-zoom" detector elements (spaced at 13 × 3 km2 at nadir). We assess the spatial response of these individual detector elements in-flight and determine an upper-bound on spatial resolution of 9 km, in good agreement with on-ground calibration (7 km FWHM). We determine the precision of the super-zoom mode to be 2.1 × 1015 molecules cm−2, approximately a factor of √8 lower than an identical retrieval at operational scale as expected if random noise dominates the uncertainty. We retrieve slant column NO2 over the Satpura power plant in India; Seoul, South Korea; Dubai, United Arab Emirates; and a set of large point sources on the Rihand Reservoir in India using differential optical absorption spectroscopy (DOAS). Over these sources, the super-zoom mode of OMI observes variation in slant column NO2 of up to 30 × the instrumental precision within one operational footprint. |
| نوع الوثيقة: | article |
| وصف الملف: | electronic resource |
| اللغة: | English |
| تدمد: | 1867-1381 1867-8548 |
| Relation: | http://www.atmos-meas-tech.net/4/1929/2011/amt-4-1929-2011.pdf; https://doaj.org/toc/1867-1381; https://doaj.org/toc/1867-8548 |
| DOI: | 10.5194/amt-4-1929-2011 |
| URL الوصول: | https://doaj.org/article/57a8bd3fc2c24380a89aabb840502d0c |
| رقم الانضمام: | edsdoj.57a8bd3fc2c24380a89aabb840502d0c |
| قاعدة البيانات: | Directory of Open Access Journals |
Full Text Finder | تدمد: | 18671381 18678548 |
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| DOI: | 10.5194/amt-4-1929-2011 |