globalchange  > 气候减缓与适应
DOI: 10.1029/2018JD028271
Scopus记录号: 2-s2.0-85050369019
论文题名:
Effects of Scavenging, Entrainment, and Aqueous Chemistry on Peroxides and Formaldehyde in Deep Convective Outflow Over the Central and Southeast United States
作者: Bela M.M.; Barth M.C.; Toon O.B.; Fried A.; Ziegler C.; Cummings K.A.; Li Y.; Pickering K.E.; Homeyer C.R.; Morrison H.; Yang Q.; Mecikalski R.M.; Carey L.; Biggerstaff M.I.; Betten D.P.; Alford A.A.
刊名: Journal of Geophysical Research: Atmospheres
ISSN: 2169897X
出版年: 2018
卷: 123, 期:14
起始页码: 7594
结束页码: 7614
语种: 英语
英文关键词: aqueous chemistry ; deep convection ; entrainment ; formaldehyde ; peroxides ; scavenging
英文摘要: Deep convective transport of gaseous precursors to ozone (O3) and aerosols to the upper troposphere is affected by liquid phase and mixed-phase scavenging, entrainment of free tropospheric air and aqueous chemistry. The contributions of these processes are examined using aircraft measurements obtained in storm inflow and outflow during the 2012 Deep Convective Clouds and Chemistry (DC3) experiment combined with high-resolution (dx≤3 km) WRF-Chem simulations of a severe storm, an air mass storm, and a mesoscale convective system (MCS). The simulation results for the MCS suggest that formaldehyde (CH2O) is not retained in ice when cloud water freezes, in agreement with previous studies of the severe storm. By analyzing WRF-Chem trajectories, the effects of scavenging, entrainment, and aqueous chemistry on outflow mixing ratios of CH2O, methyl hydroperoxide (CH3OOH), and hydrogen peroxide (H2O2) are quantified. Liquid phase microphysical scavenging was the dominant process reducing CH2O and H2O2 outflow mixing ratios in all three storms. Aqueous chemistry did not significantly affect outflow mixing ratios of all three species. In the severe storm and MCS, the higher than expected reductions in CH3OOH mixing ratios in the storm cores were primarily due to entrainment of low-background CH3OOH. In the air mass storm, lower CH3OOH and H2O2 scavenging efficiencies (SEs) than in the MCS were partly due to entrainment of higher background CH3OOH and H2O2. Overestimated rain and hail production in WRF-Chem reduces the confidence in ice retention fraction values determined for the peroxides and CH2O. ©2018. American Geophysical Union. All Rights Reserved.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/113474
Appears in Collections:气候减缓与适应

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作者单位: Department of Atmospheric and Oceanic Sciences, University of Colorado Boulder, Boulder, CO, United States; Laboratory for Atmospheric and Space Physics, University of Colorado Boulder, Boulder, CO, United States; Cooperative Institute for Research in the Environmental Sciences, University of Colorado Boulder, Boulder, CO, United States; Chemical Sciences Division, Earth System Research Laboratory, National Oceanic and Atmospheric Administration, Boulder, CO, United States; National Center for Atmospheric Research, Boulder, CO, United States; Institute of Arctic and Alpine Research, University of Colorado Boulder, Boulder, CO, United States; National Severe Storms Laboratory, National Oceanic and Atmospheric Administration, Norman, OK, United States; Department of Atmospheric and Oceanic Science, University of Maryland, College Park, MD, United States; Kennedy Space Center, National Aeronautics and Space Administration, Merritt Island, FL, United States; Goddard Space Flight Center, National Aeronautics and Space Administration, Greenbelt, MD, United States; School of Meteorology, University of Oklahoma, Norman, OK, United States; Pacific Northwest National Laboratory, Richland, WA, United States; Department of Atmospheric Science, University of Alabama, Huntsville, AL, United States

Recommended Citation:
Bela M.M.,Barth M.C.,Toon O.B.,et al. Effects of Scavenging, Entrainment, and Aqueous Chemistry on Peroxides and Formaldehyde in Deep Convective Outflow Over the Central and Southeast United States[J]. Journal of Geophysical Research: Atmospheres,2018-01-01,123(14)
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