Sensitivity of Tropospheric Ozone Over the Southeast USA to Dry Deposition

Baublitz, Colleen B.; Fiore, Arlene M.; Clifton, Olivia E.; Mao, Jingqiu; Li, Jingyi; Correa, Gus; Westervelt, Daniel M.; Horowitz, Larry W.; Paulot, Fabien; Williams, A. Park

doi:10.1029/2020gl087158

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Sensitivity of Tropospheric Ozone Over the Southeast USA to Dry Deposition

2020
By Baublitz, Colleen B. ; Fiore, Arlene M. ; Clifton, Olivia E. ; ...
Source: Geophysical ResearchLetters,47, e2020GL087158. https://doi.org/10.1029/2020GL087158

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Journal Title:

Geophysical Research Letters
Personal Author:

Baublitz, Colleen B. ; Fiore, Arlene M. ; Clifton, Olivia E. ; Mao, Jingqiu ; Li, Jingyi ; ... More +

Baublitz, Colleen B. ; Fiore, Arlene M. ; Clifton, Olivia E. ; Mao, Jingqiu ; Li, Jingyi ; Correa, Gus ; Westervelt, Daniel M. ; Horowitz, Larry W. ; Paulot, Fabien ; Williams, A. Park Less -
NOAA Program & Office:

OAR (Oceanic and Atmospheric Research) ; CPO (Climate Program Office) ; GFDL (Geophysical Fluid Dynamics Laboratory) ; CICAR (Cooperative Institute for Climate Applications and Research) ; CICOES (Cooperative Institute for Climate, Ocean and Ecosystem Studies)

OAR (Oceanic and Atmospheric Research) ; CPO (Climate Program Office) ; GFDL (Geophysical Fluid Dynamics Laboratory) ; CICAR (Cooperative Institute for Climate Applications and Research) ; CICOES (Cooperative Institute for Climate, Ocean and Ecosystem Studies) Less -
Description:

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.
Keywords:

[+]

Air-quality Chemistry Decadal Changes Emissions Geology Model Organic Nitrates Production Efficiency Reactive Oxidized Nitrogen Surface Ozone
Source:

Geophysical ResearchLetters,47, e2020GL087158. https://doi.org/10.1029/2020GL087158
DOI:

https://doi.org/10.1029/2020gl087158
Document Type:

Journal Article
Funding:

Grant no. NA14OAR4310133
Place as Subject:

Southern States ; East (U.S.)

Southern States ; East (U.S.) Less -
Rights Information:

Public Domain
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Submitted
Main Document Checksum:

[+]

urn:sha256:682b7c9a2bad4387c99bda6200535c924d8d3ecd0b9393393803059c7a241c6e
Download URL:

https://repository.library.noaa.gov/view/noaa/29891/noaa_29891_DS1.pdf
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Sensitivity of Tropospheric Ozone Over the Southeast USA to Dry Deposition

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