Sensitivity of Tropospheric Ozone Over the Southeast USA to Dry Deposition

Sensitivity of Tropospheric Ozone Over the Southeast USA to Dry Deposition
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美国东南部对流层臭氧对干沉积的敏感性

DOI:
10.1029/2020gl087158
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发表时间:
2020
影响因子:
5.2
通讯作者:
A. Park Williams
A. Park Williams
中科院分区:
地球科学1区
文献类型:
--
作者:
C. Baublitz;Arlene M. Fiore;O. Clifton;J. Mao;Jingyi Li;G. Correa;D. Westervelt;L. Horowitz;F. Paulot;A. Park Williams

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干沉降(DD)是对流层臭氧和一些活性氮和碳前体物的主要损失过程。我们调查的夏季臭氧及其生产化学在美国东南部(美国)的变化在这个水槽的响应。在地球物理流体动力学实验室AM3模型中,关闭美国上空的氧化氮、臭氧或所有物种的DD分别使区域平均表面臭氧增加5、18或25 ppb。额外的敏感性模拟表明,假设线性,表面臭氧具有类似的敏感性,臭氧DD的氮氧化物排放量。如果臭氧DD发生变化(例如,气象学)。我们的结论是,DD的变化值得考虑时,解释观察到的臭氧趋势。量化汇与源的变化影响将需要在整个感兴趣的区域进行长期的DD测量。
Dry deposition (DD) is a major loss process for tropospheric ozone and some reactive nitrogen and carbon precursors. We investigate the response of summertime ozone and its production chemistry over the Southeast United States (USA) to variability in this sink. Turning off DD of oxidized nitrogen, ozone, or all species over the United States in the Geophysical Fluid Dynamics Laboratory AM3 model increases regional mean surface ozone by 5, 18, or 25 ppb, respectively. Additional sensitivity simulations demonstrate that, assuming linearity, surface ozone has a similar sensitivity to ozone DD as to NOx emissions. Trends in ozone production efficiency derived from observed relationships between ozone and precursor oxidation products may not solely reflect precursor emission changes if ozone DD varies (e.g., with meteorology). We conclude that DD variability merits consideration when interpreting observed ozone trends. Quantifying the impact of changes in sinks versus sources will require long‐term DD measurements across the region of interest.
全球尺度化学气候模型中臭氧干沉降的评估
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发表时间: 2014
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期刊: Journal of Geophysical Research: Atmospheres
影响因子: --
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