Atmospheric oxidation in the presence of clouds during the Deep Convective Clouds and Chemistry (DC3) study
<p>Deep convective clouds are critically important to the distribution of atmospheric constituents throughout the troposphere but are difficult environments to study. The Deep Convective Clouds and Chemistry (DC3) study in 2012 provided the environment, platforms, and instrumentation to tes...
| Main Authors: | , , , , , , , , , , , , , , , , , , , , |
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| Format: | Article |
| Language: | English |
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Copernicus Publications
2018-10-01
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| Series: | Atmospheric Chemistry and Physics |
| Online Access: | https://www.atmos-chem-phys.net/18/14493/2018/acp-18-14493-2018.pdf |
| _version_ | 1819116554648813568 |
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| author | W. H. Brune X. Ren X. Ren L. Zhang J. Mao D. O. Miller B. E. Anderson D. R. Blake R. C. Cohen G. S. Diskin S. R. Hall T. F. Hanisco L. G. Huey B. A. Nault B. A. Nault J. Peischl J. Peischl I. Pollack I. Pollack I. Pollack T. B. Ryerson T. Shingler T. Shingler A. Sorooshian A. Sorooshian K. Ullmann A. Wisthaler P. J. Wooldridge |
| author_facet | W. H. Brune X. Ren X. Ren L. Zhang J. Mao D. O. Miller B. E. Anderson D. R. Blake R. C. Cohen G. S. Diskin S. R. Hall T. F. Hanisco L. G. Huey B. A. Nault B. A. Nault J. Peischl J. Peischl I. Pollack I. Pollack I. Pollack T. B. Ryerson T. Shingler T. Shingler A. Sorooshian A. Sorooshian K. Ullmann A. Wisthaler P. J. Wooldridge |
| author_sort | W. H. Brune |
| collection | DOAJ |
| description | <p>Deep convective clouds are critically important to the distribution of
atmospheric constituents throughout the troposphere but are difficult
environments to study. The Deep Convective Clouds and Chemistry (DC3) study
in 2012 provided the environment, platforms, and instrumentation to test
oxidation chemistry around deep convective clouds and their impacts downwind.
Measurements on the NASA DC-8 aircraft included those of the radicals
hydroxyl (OH) and hydroperoxyl (HO<sub>2</sub>), OH reactivity, and more than
100 other chemical species and atmospheric properties. OH, HO<sub>2</sub>, and
OH reactivity were compared to photochemical models, some with and some
without simplified heterogeneous chemistry, to test the understanding of
atmospheric oxidation as encoded in the model. In general, the agreement
between the observed and modeled OH, HO<sub>2</sub>, and OH reactivity was
within the combined uncertainties for the model without heterogeneous
chemistry and the model including heterogeneous chemistry with small OH and
HO<sub>2</sub> uptake consistent with laboratory studies. This agreement is
generally independent of the altitude, ozone photolysis rate, nitric oxide
and ozone abundances, modeled OH reactivity, and aerosol and ice surface
area. For a sunrise to midday flight downwind of a nighttime mesoscale
convective system, the observed ozone increase is consistent with the
calculated ozone production rate. Even with some observed-to-modeled
discrepancies, these results provide evidence that a current
measurement-constrained photochemical model can simulate observed atmospheric
oxidation processes to within combined uncertainties, even around convective
clouds. For this DC3 study, reduction in the combined uncertainties would be
needed to confidently unmask errors or omissions in the model chemical
mechanism.</p> |
| first_indexed | 2024-12-22T05:18:56Z |
| format | Article |
| id | doaj.art-c1e03aa0ab3d4736a66a6065f2e3540e |
| institution | Directory Open Access Journal |
| issn | 1680-7316 1680-7324 |
| language | English |
| last_indexed | 2024-12-22T05:18:56Z |
| publishDate | 2018-10-01 |
| publisher | Copernicus Publications |
| record_format | Article |
| series | Atmospheric Chemistry and Physics |
| spelling | doaj.art-c1e03aa0ab3d4736a66a6065f2e3540e2022-12-21T18:37:46ZengCopernicus PublicationsAtmospheric Chemistry and Physics1680-73161680-73242018-10-0118144931451010.5194/acp-18-14493-2018Atmospheric oxidation in the presence of clouds during the Deep Convective Clouds and Chemistry (DC3) studyW. H. Brune0X. Ren1X. Ren2L. Zhang3J. Mao4D. O. Miller5B. E. Anderson6D. R. Blake7R. C. Cohen8G. S. Diskin9S. R. Hall10T. F. Hanisco11L. G. Huey12B. A. Nault13B. A. Nault14J. Peischl15J. Peischl16I. Pollack17I. Pollack18I. Pollack19T. B. Ryerson20T. Shingler21T. Shingler22A. Sorooshian23A. Sorooshian24K. Ullmann25A. Wisthaler26P. J. Wooldridge27Department of Meteorology and Atmospheric Science, Pennsylvania State University, University Park, PA, USADepartment of Atmospheric and Oceanic Science, University of Maryland, College Park, MD, USAAir Resources Laboratory, National Oceanic and Atmospheric Administration, College Park, MD, USADepartment of Meteorology and Atmospheric Science, Pennsylvania State University, University Park, PA, USADepartment of Chemistry and Biochemistry, University of Alaska, Fairbanks, Fairbanks, AK, USADepartment of Meteorology and Atmospheric Science, Pennsylvania State University, University Park, PA, USAChemistry and Dynamics Branch, NASA Langley Research Center, Hampton, VA, USADepartment of Chemistry, University of California, Irvine, CA, USADepartments of Chemistry and Earth and Planetary Sciences, University of California, Berkeley, Berkeley, CA, USAChemistry and Dynamics Branch, NASA Langley Research Center, Hampton, VA, USAAtmospheric Chemistry Observations and Modeling Laboratory, National Center for Atmospheric Research, Boulder, CO, USAAtmospheric Chemistry and Dynamics Branch, Goddard Space Flight Center, Greenbelt, MD, USASchool of Earth and Atmospheric Sciences, Georgia Institute of Technology, Atlanta, GA, USADepartment of Earth and Planetary Sciences, University of California, Berkeley, Berkeley, CA, USAnow at: Cooperative Institute for Research in Environmental Sciences, University of Colorado, Boulder, CO, USA Cooperative Institute for Research in Environmental Sciences, University of Colorado, Boulder, CO, USAEarth System Research Laboratory, National Oceanic and Atmospheric Administration, Boulder, CO, USACooperative Institute for Research in Environmental Sciences, University of Colorado, Boulder, CO, USAEarth System Research Laboratory, National Oceanic and Atmospheric Administration, Boulder, CO, USAnow at: Department of Atmospheric Science, Colorado State University, Fort Collins, CO, USA Earth System Research Laboratory, National Oceanic and Atmospheric Administration, Boulder, CO, USAScience Systems and Applications, Inc., Hampton, VA, USAAtmospheric Composition Branch, NASA Langley Research Center, Hampton, VA, USADepartment of Chemical and Environmental Engineering, University of Arizona, Tucson, AZ, USADepartment of Hydrology and Atmospheric Sciences, University of Arizona, Tucson, AZ, USAAtmospheric Chemistry Observations and Modeling Laboratory, National Center for Atmospheric Research, Boulder, CO, USADepartment of Chemistry, University of Oslo, Oslo, NorwayDepartments of Chemistry and Earth and Planetary Sciences, University of California, Berkeley, Berkeley, CA, USA<p>Deep convective clouds are critically important to the distribution of atmospheric constituents throughout the troposphere but are difficult environments to study. The Deep Convective Clouds and Chemistry (DC3) study in 2012 provided the environment, platforms, and instrumentation to test oxidation chemistry around deep convective clouds and their impacts downwind. Measurements on the NASA DC-8 aircraft included those of the radicals hydroxyl (OH) and hydroperoxyl (HO<sub>2</sub>), OH reactivity, and more than 100 other chemical species and atmospheric properties. OH, HO<sub>2</sub>, and OH reactivity were compared to photochemical models, some with and some without simplified heterogeneous chemistry, to test the understanding of atmospheric oxidation as encoded in the model. In general, the agreement between the observed and modeled OH, HO<sub>2</sub>, and OH reactivity was within the combined uncertainties for the model without heterogeneous chemistry and the model including heterogeneous chemistry with small OH and HO<sub>2</sub> uptake consistent with laboratory studies. This agreement is generally independent of the altitude, ozone photolysis rate, nitric oxide and ozone abundances, modeled OH reactivity, and aerosol and ice surface area. For a sunrise to midday flight downwind of a nighttime mesoscale convective system, the observed ozone increase is consistent with the calculated ozone production rate. Even with some observed-to-modeled discrepancies, these results provide evidence that a current measurement-constrained photochemical model can simulate observed atmospheric oxidation processes to within combined uncertainties, even around convective clouds. For this DC3 study, reduction in the combined uncertainties would be needed to confidently unmask errors or omissions in the model chemical mechanism.</p>https://www.atmos-chem-phys.net/18/14493/2018/acp-18-14493-2018.pdf |
| spellingShingle | W. H. Brune X. Ren X. Ren L. Zhang J. Mao D. O. Miller B. E. Anderson D. R. Blake R. C. Cohen G. S. Diskin S. R. Hall T. F. Hanisco L. G. Huey B. A. Nault B. A. Nault J. Peischl J. Peischl I. Pollack I. Pollack I. Pollack T. B. Ryerson T. Shingler T. Shingler A. Sorooshian A. Sorooshian K. Ullmann A. Wisthaler P. J. Wooldridge Atmospheric oxidation in the presence of clouds during the Deep Convective Clouds and Chemistry (DC3) study Atmospheric Chemistry and Physics |
| title | Atmospheric oxidation in the presence of clouds during the Deep Convective Clouds and Chemistry (DC3) study |
| title_full | Atmospheric oxidation in the presence of clouds during the Deep Convective Clouds and Chemistry (DC3) study |
| title_fullStr | Atmospheric oxidation in the presence of clouds during the Deep Convective Clouds and Chemistry (DC3) study |
| title_full_unstemmed | Atmospheric oxidation in the presence of clouds during the Deep Convective Clouds and Chemistry (DC3) study |
| title_short | Atmospheric oxidation in the presence of clouds during the Deep Convective Clouds and Chemistry (DC3) study |
| title_sort | atmospheric oxidation in the presence of clouds during the deep convective clouds and chemistry dc3 study |
| url | https://www.atmos-chem-phys.net/18/14493/2018/acp-18-14493-2018.pdf |
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