i
Higher measured than modeled ozone production at increased NOx levels in the Colorado Front Range
-
2017
Source: Atmospheric Chemistry and Physics, 17(18), 11273-11292.
[PDF-3.35 MB]
Details:
-
Journal Title:Atmospheric Chemistry and Physics
-
Personal Author:
-
NOAA Program & Office:
-
Description:Chemical models must correctly calculate the ozone formation rate, P(O-3), to accurately predict ozone levels and to test mitigation strategies. However, air quality models can have large uncertainties in P(O-3) calculations, which can create uncertainties in ozone forecasts, especially during the summertime when P(O-3) is high. One way to test mechanisms is to compare modeled P(O-3) to direct measurements. During summer 2014, the Measurement of Ozone Production Sensor (MOPS) directly measured net P(O-3) in Golden, CO, approximately 25 km west of Denver along the Colorado Front Range. Net P(O-3) was compared to rates calculated by a photochemical box model that was constrained by measurements of other chemical species and that used a lumped chemical mechanism and a more explicit one. Median observed P(O-3) was up to a factor of 2 higher than that modeled during early morning hours when nitric oxide (NO) levels were high and was similar to modeled P(O-3) for the rest of the day. While all interferences and offsets in this new method are not fully understood, simulations of these possible uncertainties cannot explain the observed P(O-3) behavior. Modeled and measured P(O-3) and peroxy radical (HO2 and RO2) discrepancies observed here are similar to those presented in prior studies. While a missing atmospheric organic peroxy radical source from volatile organic compounds coemitted with NO could be one plausible solution to the P(O-3) discrepancy, such a source has not been identified and does not fully explain the peroxy radical model-data mismatch. If the MOPS accurately depicts atmospheric P(O-3), then these results would imply that P(O-3) in Golden, CO, would be NOx-sensitive for more of the day than what is calculated by models, extending the NOx-sensitive P(O-3) regime from the afternoon further into the morning. These results could affect ozone reduction strategies for the region surrounding Golden and possibly other areas that do not comply with national ozone regulations. Thus, it is important to continue the development of this direct ozone measurement technique to understand P(O-3), especially under high-NOx regimes.
-
Source:Atmospheric Chemistry and Physics, 17(18), 11273-11292.
-
Document Type:
-
Rights Information:CC BY
-
Compliance:Submitted
-
Main Document Checksum:urn:sha256:5d2e3df5136369f6463cbb8ee1572716438b7312c77acf54a822afac091cacc9
-
File Type:
Supporting Files
-
No Additional Files
More +
Related Documents
-
Personal Author:Tulich, S. N.2015 | Journal of Advances in Modeling Earth Systems, 7(2), 938-962.Description:This paper describes a general method for the treatment of convective momentum transport (CMT) in large-scale dynamical solvers that use a cyclic, two...Personal Author:Cram, Thomas A. ;Compo, Gilbert P....2015 | Geoscience Data Journal, 2(1), 31-46.Description:The International Surface Pressure Databank (ISPD) is the world's largest collection of global surface and sea-level pressure observations. It was dev...2019 | Communications Biology, 2(1), 168.Description:Spatial planning increasingly incorporates theoretical predictions that artificial habitats assist species movement at or beyond range edges, yet evid...Personal Author:Andersson, Erik ;Day, Rusty...2019 | Metabolites, 9(2), 32.Description:The field of metabolomics generally lacks standardized methods for the preparation of samples prior to analysis. This is especially true for metabolom...2019 | Journal of Marine Science and Engineering, 7(2), 27.Description:Long-term ecological monitoring of reef fish populations often requires the simultaneous collection of data on benthic habitats in order to account fo...2019 | Scientific Reports, 9(1), 16874.Description:Tsunamis can propagate thousands of kilometres across the ocean. Precise calculations of arrival times are essential for reliable early warning system...A Long-Term Fine-Resolution Record of AVHRR Surface Temperatures for the Laurentian Great LakesCitePersonal Author:White, Charles ;Heidinger, Andrew...2018 | Remote Sensing, 10(8), 20.Description:Inland waters are warming at highly variable rates that often differ from regional air temperature trends. This variable warming is partially attribut...2018 | Journal of Geophysical Research-Atmospheres, 123(11), 6022-6038.Description:Information about moisture distribution and transportation in the preconvection environment is very important for nowcasting and forecasting severe we...Personal Author:Liu, Yinghui ;Dworak, Richard...2018 | Remote Sensing, 10(12), 12.Description:Current methods for estimating the surface temperature of sea and lake ice-the ice surface temperature (IST)-utilize two satellite imager thermal band...Personal Author:Gochis, David ;Schumacher, Russ...2015 | Bulletin of the American Meteorological Society, 96(9), 1461-1487.Description:During the second week of September 2013, a seasonally uncharacteristic weather pattern stalled over the Rocky Mountain Front Range region of northern...2017 | Atmospheric Chemistry and Physics, 17(2), 1417-1452.Description:The climate research community uses atmospheric reanalysis data sets to understand a wide range of processes and variability in the atmosphere, yet di...2018 | Journal of Geophysical Research-Atmospheres, 123(21), 12368-12393.Description:We examine the distribution and fate of nitrogen oxides (NOx) in the lower troposphere over the Northeast United States (NE US) using aircraft observa...2017 | Atmospheric Chemistry and Physics, 17(2), 1161-1186.Description:We report measurements of CH4 (measured in situ by the Harvard University Picarro Cavity Ringdown Spectrometer (HUPCRS) and NOAA Unmanned Aircraft Sys...2017 | Atmospheric Measurement Techniques, 10(8), 2941-2968.Description:VOCs related to oil and gas extraction operations in the United States were measured by H3O+ chemical ionization time-of-flight mass spectrometry (H3O...2017 | Atmospheric Chemistry and Physics, 17(8), 5331-5354.Description:Ambient pine forest air was oxidized by OH, O-3, or NO3 radicals using an oxidation flow reactor (OFR) during the BEACHON-RoMBAS (Bio-hydro-atmosphere...2017 | Journal of Advances in Modeling Earth Systems, 9(1), 627-646.Description:Low and high clouds of shallow extent, especially stratocumulus and even more so for high-level cirrus clouds that reside where vertical resolution is...2017 | Atmospheric Measurement Techniques, 10(5), 1911-1926.Description:The sum of all reactive nitrogen species (NOy) includes NOx (NO2 + NO) and all of its oxidized forms, and the accurate detection of NOy is critical to...Personal Author:Vander Woude, Andrea ;Ruberg, Steve...2019 | Journal of Great Lakes Research, 45(3), 536-546.Description:NOAA GLERL has routinely flown a hyperspectral imager to detect cyanobacteria harmful algal blooms (cyanoHABs) over the Great Lakes since 2015. Three ...Personal Author:Churnside, James ;Marchbanks, Richard...2017 | Remote Sensing, 9(4), 12.Description:The optical backscattering from particles in the ocean is an important quantity that has been measured by remote sensing techniques and in situ instru...2017 | Journal of Geophysical Research-Atmospheres, 122(7), 3944-3952.Description:In the current study, the electromagnetic properties of porous aerosol particles are calculated in two ways. In the first, a porous target input file ...
More +
You May Also Like
Personal Author:
McDuffie, Erin E. ;
Edwards, Peter M.
...
2016 | Journal of Geophysical Research-Atmospheres, 121(14), 8712-8729.
Description:
Tropospheric O-3 has been decreasing across much of the eastern U.S. but has remained steady or even increased in some western regions. Recent increas...
2018 | Atmospheric Chemistry and Physics, 18(11), 8293-8312.
Description:
The evolution of organic aerosols (OAs) and their precursors in the boundary layer (BL) of the Colorado Front Range during the Front Range Air Polluti...
Checkout today's featured content at repository.library.noaa.gov