Algorithm for NO/sub 2/ vertical column retrieval from the ozone monitoring instrument

Bucsela, E. J.; Celarier, E. A.; Wenig, Mark; Gleason, J. F.; Veefkind, J. P.; Boersma, K. Folkert; Brinksma, E. J.

doi:10.1109/tgrs.2005.863715

Cited by 278 publications

(275 citation statements)

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“…[7] The tropospheric NO 2 data utilized in this study are from the 0.25°× 0.25°gridded OMNO 2 L2G product, developed at NASA's Goddard Space Flight Center [Bucsela et al, 2006]. To retrieve NO 2 , spectral fitting in the OMI spectral range of 405-465 nm is used to derive the SCD of NO 2 , which is then converted to the NO 2 VCD with predetermined AMF's.…”

Section: Methodsmentioning

confidence: 99%

Recent large reduction in sulfur dioxide emissions from Chinese power plants observed by the Ozone Monitoring Instrument

Zhang

Krotkov

et al. 2010

Geophysical Research Letters

171

161

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[1] The Ozone Monitoring Instrument (OMI) aboard NASA's Aura satellite observed substantial increases in total column SO 2 and tropospheric column NO 2 from 2005 to 2007, over several areas in northern China where large coal-fired power plants were built during this period. The OMI-observed SO 2 /NO 2 ratio is consistent with the SO 2 / NO x emissions estimated from a bottom-up approach. In 2008 over the same areas, OMI detected little change in NO 2 , suggesting steady electricity output from the power plants. However, dramatic reductions of SO 2 emissions were observed by OMI at the same time. These reductions confirm the effectiveness of the flue-gas desulfurization (FGD) devices in reducing SO 2 emissions, which likely became operational between 2007 and 2008. This study further demonstrates that the satellite sensors can monitor and characterize anthropogenic emissions from large point sources.

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Section: Methodsmentioning

confidence: 99%

Recent large reduction in sulfur dioxide emissions from Chinese power plants observed by the Ozone Monitoring Instrument

Zhang

Krotkov

et al. 2010

Geophysical Research Letters

171

161

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“…The nearreal-time OMI NO 2 product [Boersma et al, 2008b] was not available for 2005. Detailed descriptions of the algorithm for the standard OMI NO 2 data product are given in Boersma et al [2002], Bucsela et al [2006], . In brief, the standard algorithm uses the Differential Optical Absorption Spectroscopy (DOAS) technique [Platt, 1994] to determine the slant column densities by nonlinear least squares fitting in the 415 -465 nm window.…”

Section: Omi Tropospheric No 2 Columnsmentioning

confidence: 99%

Ground‐level nitrogen dioxide concentrations inferred from the satellite‐borne Ozone Monitoring Instrument

et al. 2008

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[1] We present an approach to infer ground-level nitrogen dioxide (NO 2 ) concentrations by applying local scaling factors from a global three-dimensional model (GEOS-Chem) to tropospheric NO 2 columns retrieved from the Ozone Monitoring Instrument (OMI) onboard the Aura satellite. Seasonal mean OMI surface NO 2 derived from the standard tropospheric NO 2 data product (Version 1.0.5, Collection 3) varies by more than two orders of magnitude (<0.1->10 ppbv) over North America. Two ground-based data sets are used to validate the surface NO 2 estimate and indirectly validate the OMI tropospheric NO 2 retrieval: photochemical steady-state (PSS) calculations of NO 2 based on in situ NO and O 3 measurements, and measurements from a commercial chemiluminescent NO 2 analyzer equipped with a molybdenum converter. An interference correction algorithm for the latter is developed using laboratory and field measurements and applied using modeled concentrations of the interfering species. The OMI-derived surface NO 2 mixing ratios are compared with an in situ surface NO 2 data obtained from the U.S. Environmental Protection Agency's Air Quality System (AQS) and Environment Canada's National Air Pollution Surveillance (NAPS) network for 2005 after correcting for the interference in the in situ data. The overall agreement of the OMI-derived surface NO 2 with the corrected in situ measurements and PSS-NO 2 is À11-36%. A larger difference in winter/spring than in summer/fall implies a seasonal bias in the OMI NO 2 retrieval. The correlation between the OMI-derived surface NO 2 and the ground-based measurements is significant (correlation coefficient up to 0.86) with a tendency for higher correlations in polluted areas. The satellite-derived data base of ground level NO 2 concentrations could be valuable for assessing exposures of humans and vegetation to NO 2 , supplementing the capabilities of the ground-based networks, and evaluating air quality models and the effectiveness of air quality control strategies.Citation: Lamsal, L. N., R.

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“…In this study, NASA's OMI tropospheric NO 2 data product is used (Bucsela et al, 2006). The NO 2 slant column density (SCD) is retrieved by fitting the OMI spectrum for wavelengths ranging from 405 nm to 465 nm using the DOAS technique.…”

Section: Omi Tropospheric No 2 Vcd Retrievalmentioning

confidence: 99%

“…The AMF calculation depends on the viewing geometry, surface albedo, atmospheric scattering and the NO 2 vertical profile (Palmer et al, 2001). AMFs are calculated on the basis of annual mean NO 2 profiles obtained from the GEOSChem model ) and pre-calculated altitudedependent AMFs (Bucsela et al, 2006). The stratospheric and tropospheric amounts of NO 2 are separated by assuming the tropospheric NO 2 varies on a much smaller spatial scale than the stratospheric NO 2 .…”

Section: Omi Tropospheric No 2 Vcd Retrievalmentioning

confidence: 99%

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NO<sub>2</sub> measurements in Hong Kong using LED based long path differential optical absorption spectroscopy

et al. 2012

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Abstract. In this study we present the first long term measurements of atmospheric nitrogen dioxide (NO 2 ) using a LED based Long Path Differential Optical Absorption Spectroscopy (LP-DOAS) instrument. This instrument is measuring continuously in Hong Kong since December 2009, first in a setup with a 550 m absorption path and then with a 3820 m path at about 30 m to 50 m above street level. The instrument is using a high power blue light LED with peak intensity at 450 nm coupled into the telescope using a Y-fibre bundle. The LP-DOAS instrument measures NO 2 levels in the Kowloon Tong and Mongkok district of Hong Kong and we compare the measurement results to mixing ratios reported by monitoring stations operated by the Hong Kong Environmental Protection Department in that area. Hourly averages of coinciding measurements are in reasonable agreement (R = 0.74). Furthermore, we used the long-term data set to validate the Ozone Monitoring Instrument (OMI) NO 2 data product. Monthly averaged LP-DOAS and OMI measurements correlate well (R = 0.84) when comparing the data for the OMI overpass time. We analyzed weekly patterns in both data sets and found that the LP-DOAS detects a clear weekly cycle with a reduction on weekends during rush hour peaks, whereas OMI is not able to observe this weekly cycle due to its fix overpass time (13:30-14:30 LT -local time).

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Algorithm for NO/sub 2/ vertical column retrieval from the ozone monitoring instrument

Cited by 278 publications

References 30 publications

Recent large reduction in sulfur dioxide emissions from Chinese power plants observed by the Ozone Monitoring Instrument

Recent large reduction in sulfur dioxide emissions from Chinese power plants observed by the Ozone Monitoring Instrument

Ground‐level nitrogen dioxide concentrations inferred from the satellite‐borne Ozone Monitoring Instrument

NO<sub>2</sub> measurements in Hong Kong using LED based long path differential optical absorption spectroscopy

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Algorithm for NO/sub 2/ vertical column retrieval from the ozone monitoring instrument

Cited by 278 publications

References 30 publications

Recent large reduction in sulfur dioxide emissions from Chinese power plants observed by the Ozone Monitoring Instrument

Recent large reduction in sulfur dioxide emissions from Chinese power plants observed by the Ozone Monitoring Instrument

Ground‐level nitrogen dioxide concentrations inferred from the satellite‐borne Ozone Monitoring Instrument

NO&lt;sub&gt;2&lt;/sub&gt; measurements in Hong Kong using LED based long path differential optical absorption spectroscopy

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NO<sub>2</sub> measurements in Hong Kong using LED based long path differential optical absorption spectroscopy