Comprehensive evaluations of diurnal NO₂ measurements during DISCOVER-AQ 2011: effects of resolution-dependent representation of NOₓ emissions

Simple item page
dc.contributor.authorLi, Jianfeng
dc.contributor.authorWang, Yuhang
dc.contributor.authorZhang, Ruixiong
dc.contributor.authorSmeltzer, Charles
dc.contributor.authorWeinheimer, Andrew
dc.contributor.authorHerman, Jay
dc.contributor.authorBoersma, K. Folkert
dc.contributor.authorCelarier, Edward A.
dc.contributor.authorLong, Russell W.
dc.contributor.authorSzykman, James J.
dc.contributor.authorDelgado, Ruben
dc.contributor.authorThompson, Anne M.
dc.contributor.authorKnepp, Travis N.
dc.contributor.authorLamsal, Lok N.
dc.contributor.authorJanz, Scott J.
dc.contributor.authorKowalewski, Matthew G.
dc.contributor.authorLiu, Xiong
dc.contributor.authorNowlan, Caroline R.
dc.date.accessioned2022-02-23T15:43:47Z
dc.date.available2022-02-23T15:43:47Z
dc.date.issued2021-07-23
dc.description.abstractNitrogen oxides (NOₓ = NO + NO₂) play a crucial role in the formation of ozone and secondary inorganic and organic aerosols, thus affecting human health, global radiation budget, and climate. The diurnal and spatial variations in NO₂ are functions of emissions, advection, deposition, vertical mixing, and chemistry. Their observations, therefore, provide useful constraints in our understanding of these factors. We employ a Regional chEmical and trAnsport model (REAM) to analyze the observed temporal (diurnal cycles) and spatial distributions of NO₂ concentrations and tropospheric vertical column densities (TVCDs) using aircraft in situ measurements and surface EPA Air Quality System (AQS) observations as well as the measurements of TVCDs by satellite instruments (OMI: the Ozone Monitoring Instrument; GOME-2A: Global Ozone Monitoring Experiment – 2A), ground-based Pandora, and the Airborne Compact Atmospheric Mapper (ACAM) instrument in July 2011 during the DISCOVER-AQ campaign over the Baltimore–Washington region. The model simulations at 36 and 4 km resolutions are in reasonably good agreement with the regional mean temporospatial NO₂ observations in the daytime. However, we find significant overestimations (underestimations) of model-simulated NO₂ (O₃) surface concentrations during nighttime, which can be mitigated by enhancing nocturnal vertical mixing in the model. Another discrepancy is that Pandora-measured NO₂ TVCDs show much less variation in the late afternoon than simulated in the model. The higher-resolution 4 km simulations tend to show larger biases compared to the observations due largely to the larger spatial variations in NOₓ emissions in the model when the model spatial resolution is increased from 36 to 4 km. OMI, GOME-2A, and the high-resolution aircraft ACAM observations show a more dispersed distribution of NO₂ vertical column densities (VCDs) and lower VCDs in urban regions than corresponding 36 and 4 km model simulations, likely reflecting the spatial distribution bias of NOₓ emissions in the National Emissions Inventory (NEI) 2011.en_US
dc.description.sponsorshipThis work was supported by the NASA ACMAP program. We thank Chun Zhao for providing us the PNNL NEI2011 emission inventory. We thank Yuzhong Zhang and Jenny Fisher for providing the updated GEOS-Chem chemistry mechanism files and thank Yuzhong Zhang, Yongjia Song, Hang Qu, Ye Cheng, Aoxing Zhang, Yufei Zou, and Ziming Ke for discussion with Jianfeng Li. We thank Susan Strahan for providing the GMI outputs download link. This research has been supported by the National Aeronautics and Space Administration (ACMAP program).en_US
dc.description.urihttps://acp.copernicus.org/articles/21/11133/2021/acp-21-11133-2021-discussion.htmlen_US
dc.format.extent28 pagesen_US
dc.genrejournal articlesen_US
dc.identifierdoi:10.13016/m2eclt-bobt
dc.identifier.citationLi, Jianfeng et al. Comprehensive evaluations of diurnal NO2 measurements during DISCOVER-AQ 2011: effects of resolution-dependent representation of NOx emissions. Atmostpheric Chemistry and Physics 21 (2021), 11133–11160. https://doi.org/10.5194/acp-21-11133-2021.en_US
dc.identifier.urihttps://doi.org/10.5194/acp-21-11133-2021
dc.identifier.urihttp://hdl.handle.net/11603/24319
dc.language.isoen_USen_US
dc.publisherEGUen_US
dc.relation.isAvailableAtThe University of Maryland, Baltimore County (UMBC)
dc.relation.ispartofUMBC Joint Center for Earth Systems Technology
dc.relation.ispartofUMBC Faculty Collection
dc.rightsThis work was written as part of one of the author's official duties as an Employee of the United States Government and is therefore a work of the United States Government. In accordance with 17 U.S.C. 105, no copyright protection is available for such works under U.S. Law.en_US
dc.rights.urihttp://creativecommons.org/publicdomain/mark/1.0/*
dc.titleComprehensive evaluations of diurnal NO₂ measurements during DISCOVER-AQ 2011: effects of resolution-dependent representation of NOₓ emissionsen_US
dc.typeTexten_US
dcterms.creatorhttps://orcid.org/0000-0002-9146-1632en_US
dcterms.creatorhttps://orcid.org/0000-0002-7133-2462en_US

Files

Original bundle
Now showing 1 - 2 of 2
Thumbnail Image
Name:
acp-21-11133-2021.pdf
Size:
15.4 MB
Format:
Adobe Portable Document Format
Description:
Download
No Thumbnail Available
Name:
acp-21-11133-2021-supplement.zip
Size:
5.7 MB
Format:
Unknown data format
Description:
Download
License bundle
Now showing 1 - 1 of 1
No Thumbnail Available
Name:
license.txt
Size:
2.56 KB
Format:
Item-specific license agreed upon to submission
Description:
Download

Collections

UMBC Joint Center for Earth Systems Technology (JCET)
UMBC Faculty Collection