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dc.contributor.authorBak, Juseon
dc.contributor.authorLiu, Xiong
dc.contributor.authorKim, Jae H.
dc.contributor.authorDeland, Matthew T.
dc.contributor.authorChance, Kelly
dc.date.accessioned2019-10-03T14:38:05Z
dc.date.issued2016
dc.identifier.citationBak, Juseon, Xiong Liu, Jae H. Kim, Matthew T. Deland, and Kelly Chance. 2016. “Improvement of OMI Ozone Profile Retrievals by Simultaneously Fitting Polar Mesospheric Clouds.” Atmospheric Measurement Techniques Discussions, April, 1–32. https://doi.org/10.5194/amt-2016-104.
dc.identifier.issn1867-1381
dc.identifier.issn1867-8548
dc.identifier.urihttp://nrs.harvard.edu/urn-3:HUL.InstRepos:41461175*
dc.description.abstractThe presence of polar mesospheric clouds (PMCs) at summer high latitudes could affect the retrieval of ozone profiles using backscattered ultraviolet (UV) measurements. PMC-induced errors in ozone profile retrievals from Ozone Monitoring Instrument (OMI) backscattered UV measurements are investigated through comparisons with Microwave Limb Sounder (MLS) ozone measurements. This comparison demonstrates that the presence of PMCs leads to systematic biases for pressures smaller than 6 hPa; the biases increase from similar to -2% at 2 hPa to similar to -20% at 0.5 hPa on average and are significantly correlated with brightness of PMCs. Sensitivity studies show that the radiance sensitivity to PMCs strongly depends on wavelength, increasing by a factor of similar to 4 from 300 to 265 nm. It also strongly depends on the PMC scattering, thus depending on viewing geometry. The optimal estimation-based retrieval sensitivity analysis shows that PMCs located at 80-85 km have the greatest effect on ozone retrievals at similar to 0.2 hPa (similar to 60 km), where the retrieval errors range from -2.5% with PMC vertical optical depth (POD) of 10(-4) to -20% with 10(-3) POD at backscattering angles. The impacts increase by a factor of similar to 5 at forward-scattering angles due to stronger PMC sensitivities. To reduce the interference of PMCs on ozone retrievals, we perform simultaneous retrievals of POD and ozone with a loose constraint of 10(-3) for POD, which results in retrieval errors of 1-4 x 10(-4). It is demonstrated that the negative bias of OMI ozone retrievals relative to MLS can be improved by including the PMC in the forward-model calculation and retrieval.
dc.language.isoen_US
dc.publisherEuropean Geosciences Union
dash.licenseLAA
dc.titleImprovement of OMI ozone profile retrievals by simultaneously fitting Polar Mesospheric Clouds
dc.typeJournal Article
dc.description.versionVersion of Record
dc.relation.journalAtmospheric Measurement Techniques
dash.depositing.authorChance, Kelly V.::c1853969e866fbac514a5665de391746::600
dc.date.available2019-10-03T14:38:05Z
dash.workflow.comments1Science Serial ID 11296
dc.identifier.doi10.5194/amt-2016-104
dash.source.volume9;9
dash.source.page4521-4531


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