Measurement report: Airborne measurements of NO<sub><i>x</i></sub> fluxes over Los Angeles during the RECAP-CA 2021 campaign
<p>Nitrogen oxides (<span class="inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" id="M3" display="inline" overflow="scroll" dspmath="mathml"><mrow><mrow class="chem"><msub><m...
| Main Authors: | , , , , , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Copernicus Publications
2023-10-01
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| Series: | Atmospheric Chemistry and Physics |
| Online Access: | https://acp.copernicus.org/articles/23/13015/2023/acp-23-13015-2023.pdf |
| _version_ | 1797659235295690752 |
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| author | C. M. Nussbaumer C. M. Nussbaumer B. K. Place Q. Zhu E. Y. Pfannerstill P. Wooldridge B. C. Schulze C. Arata R. Ward A. Bucholtz J. H. Seinfeld A. H. Goldstein A. H. Goldstein R. C. Cohen R. C. Cohen |
| author_facet | C. M. Nussbaumer C. M. Nussbaumer B. K. Place Q. Zhu E. Y. Pfannerstill P. Wooldridge B. C. Schulze C. Arata R. Ward A. Bucholtz J. H. Seinfeld A. H. Goldstein A. H. Goldstein R. C. Cohen R. C. Cohen |
| author_sort | C. M. Nussbaumer |
| collection | DOAJ |
| description | <p>Nitrogen oxides (<span class="inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" id="M3" display="inline" overflow="scroll" dspmath="mathml"><mrow><mrow class="chem"><msub><mi mathvariant="normal">NO</mi><mi>x</mi></msub></mrow><mo>≡</mo><mrow class="chem"><mi mathvariant="normal">NO</mi></mrow><mo>+</mo><mrow class="chem"><msub><mi mathvariant="normal">NO</mi><mn mathvariant="normal">2</mn></msub></mrow></mrow></math><span><svg:svg xmlns:svg="http://www.w3.org/2000/svg" width="85pt" height="13pt" class="svg-formula" dspmath="mathimg" md5hash="72fae000e07cdf06702a94248543dc74"><svg:image xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="acp-23-13015-2023-ie00001.svg" width="85pt" height="13pt" src="acp-23-13015-2023-ie00001.png"/></svg:svg></span></span>) are involved in most atmospheric photochemistry, including the formation of tropospheric ozone (O<span class="inline-formula"><sub>3</sub></span>). While various methods exist to accurately measure <span class="inline-formula">NO<sub><i>x</i></sub></span> concentrations, it is still a challenge to quantify the source and flux of <span class="inline-formula">NO<sub><i>x</i></sub></span> emissions. We present airborne measurements of <span class="inline-formula">NO<sub><i>x</i></sub></span> and winds used to infer the emission of <span class="inline-formula">NO<sub><i>x</i></sub></span> across Los Angeles. The measurements were obtained during the research aircraft campaign RECAP-CA (Re-Evaluating the Chemistry of Air Pollutants in CAlifornia) in June 2021. Geographic allocations of the fluxes are compared to the <span class="inline-formula">NO<sub><i>x</i></sub></span> emission inventory from the California Air Resources Board (CARB). We find that the <span class="inline-formula">NO<sub><i>x</i></sub></span> fluxes have a pronounced weekend effect and are highest in the eastern part of the San Bernardino Valley. The comparison of the RECAP-CA and the modeled CARB <span class="inline-formula">NO<sub><i>x</i></sub></span> fluxes suggests that the modeled emissions are higher than expected near the coast and in Downtown Los Angeles and lower than expected further inland in the eastern part of the San Bernardino Valley.</p> |
| first_indexed | 2024-03-11T18:10:58Z |
| format | Article |
| id | doaj.art-35b7fbc654664eda9ec229395edfb56d |
| institution | Directory Open Access Journal |
| issn | 1680-7316 1680-7324 |
| language | English |
| last_indexed | 2024-03-11T18:10:58Z |
| publishDate | 2023-10-01 |
| publisher | Copernicus Publications |
| record_format | Article |
| series | Atmospheric Chemistry and Physics |
| spelling | doaj.art-35b7fbc654664eda9ec229395edfb56d2023-10-16T13:48:09ZengCopernicus PublicationsAtmospheric Chemistry and Physics1680-73161680-73242023-10-0123130151302810.5194/acp-23-13015-2023Measurement report: Airborne measurements of NO<sub><i>x</i></sub> fluxes over Los Angeles during the RECAP-CA 2021 campaignC. M. Nussbaumer0C. M. Nussbaumer1B. K. Place2Q. Zhu3E. Y. Pfannerstill4P. Wooldridge5B. C. Schulze6C. Arata7R. Ward8A. Bucholtz9J. H. Seinfeld10A. H. Goldstein11A. H. Goldstein12R. C. Cohen13R. C. Cohen14Department of Atmospheric Chemistry, Max Planck Institute for Chemistry, 55128 Mainz, GermanyDepartment of Chemistry, University of California, Berkeley, Berkeley, CA 94720, USADepartment of Chemistry, University of California, Berkeley, Berkeley, CA 94720, USADepartment of Earth and Planetary Science, University of California, Berkeley, Berkeley, CA 94720, USADepartment of Environmental Science, Policy, and Management, University of California, Berkeley, Berkeley, CA 94720, USADepartment of Chemistry, University of California, Berkeley, Berkeley, CA 94720, USADepartment of Environmental Science and Engineering, California Institute of Technology, Pasadena, CA 91125, USADepartment of Environmental Science, Policy, and Management, University of California, Berkeley, Berkeley, CA 94720, USADepartment of Environmental Science and Engineering, California Institute of Technology, Pasadena, CA 91125, USADepartment of Meteorology, Naval Postgraduate School, Monterey, CA 93943, USADepartment of Environmental Science and Engineering, California Institute of Technology, Pasadena, CA 91125, USADepartment of Environmental Science, Policy, and Management, University of California, Berkeley, Berkeley, CA 94720, USADepartment of Civil and Environmental Engineering, University of California, Berkeley, Berkeley, CA 94720, USADepartment of Chemistry, University of California, Berkeley, Berkeley, CA 94720, USADepartment of Earth and Planetary Science, University of California, Berkeley, Berkeley, CA 94720, USA<p>Nitrogen oxides (<span class="inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" id="M3" display="inline" overflow="scroll" dspmath="mathml"><mrow><mrow class="chem"><msub><mi mathvariant="normal">NO</mi><mi>x</mi></msub></mrow><mo>≡</mo><mrow class="chem"><mi mathvariant="normal">NO</mi></mrow><mo>+</mo><mrow class="chem"><msub><mi mathvariant="normal">NO</mi><mn mathvariant="normal">2</mn></msub></mrow></mrow></math><span><svg:svg xmlns:svg="http://www.w3.org/2000/svg" width="85pt" height="13pt" class="svg-formula" dspmath="mathimg" md5hash="72fae000e07cdf06702a94248543dc74"><svg:image xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="acp-23-13015-2023-ie00001.svg" width="85pt" height="13pt" src="acp-23-13015-2023-ie00001.png"/></svg:svg></span></span>) are involved in most atmospheric photochemistry, including the formation of tropospheric ozone (O<span class="inline-formula"><sub>3</sub></span>). While various methods exist to accurately measure <span class="inline-formula">NO<sub><i>x</i></sub></span> concentrations, it is still a challenge to quantify the source and flux of <span class="inline-formula">NO<sub><i>x</i></sub></span> emissions. We present airborne measurements of <span class="inline-formula">NO<sub><i>x</i></sub></span> and winds used to infer the emission of <span class="inline-formula">NO<sub><i>x</i></sub></span> across Los Angeles. The measurements were obtained during the research aircraft campaign RECAP-CA (Re-Evaluating the Chemistry of Air Pollutants in CAlifornia) in June 2021. Geographic allocations of the fluxes are compared to the <span class="inline-formula">NO<sub><i>x</i></sub></span> emission inventory from the California Air Resources Board (CARB). We find that the <span class="inline-formula">NO<sub><i>x</i></sub></span> fluxes have a pronounced weekend effect and are highest in the eastern part of the San Bernardino Valley. The comparison of the RECAP-CA and the modeled CARB <span class="inline-formula">NO<sub><i>x</i></sub></span> fluxes suggests that the modeled emissions are higher than expected near the coast and in Downtown Los Angeles and lower than expected further inland in the eastern part of the San Bernardino Valley.</p>https://acp.copernicus.org/articles/23/13015/2023/acp-23-13015-2023.pdf |
| spellingShingle | C. M. Nussbaumer C. M. Nussbaumer B. K. Place Q. Zhu E. Y. Pfannerstill P. Wooldridge B. C. Schulze C. Arata R. Ward A. Bucholtz J. H. Seinfeld A. H. Goldstein A. H. Goldstein R. C. Cohen R. C. Cohen Measurement report: Airborne measurements of NO<sub><i>x</i></sub> fluxes over Los Angeles during the RECAP-CA 2021 campaign Atmospheric Chemistry and Physics |
| title | Measurement report: Airborne measurements of NO<sub><i>x</i></sub> fluxes over Los Angeles during the RECAP-CA 2021 campaign |
| title_full | Measurement report: Airborne measurements of NO<sub><i>x</i></sub> fluxes over Los Angeles during the RECAP-CA 2021 campaign |
| title_fullStr | Measurement report: Airborne measurements of NO<sub><i>x</i></sub> fluxes over Los Angeles during the RECAP-CA 2021 campaign |
| title_full_unstemmed | Measurement report: Airborne measurements of NO<sub><i>x</i></sub> fluxes over Los Angeles during the RECAP-CA 2021 campaign |
| title_short | Measurement report: Airborne measurements of NO<sub><i>x</i></sub> fluxes over Los Angeles during the RECAP-CA 2021 campaign |
| title_sort | measurement report airborne measurements of no sub i x i sub fluxes over los angeles during the recap ca 2021 campaign |
| url | https://acp.copernicus.org/articles/23/13015/2023/acp-23-13015-2023.pdf |
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