Ozone Variability and Anomalies Observed During SENEX and SEAC4RS Campaigns in 2013

Shi Kuang; Michael J. Newchurch; Anne M. Thompson; Ryan M. Stauffer; Bryan J. Johnson; Lihua Wang

doi:10.1002/2017JD027139

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Ozone Variability and Anomalies Observed During SENEX and SEAC4RS Campaigns in 2013

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Ozone Variability and Anomalies Observed During SENEX and SEAC4RS Campaigns in 2013

Shi Kuang, Michael J. Newchurch, Anne M. Thompson, Ryan M. Stauffer, Bryan J. Johnson and Lihua Wang

Journal of geophysical research. Atmospheres, Vol.122(20), pp.11227-11241

10/27/2017

DOI: 10.1002/2017JD027139

PMCID: PMC6058320

PMID: 30057866

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Abstract

Tropospheric ozone variability occurs because of multiple forcing factors including surface emission of ozone precursors, stratosphere-to-troposphere transport (STT), and meteorological conditions. Analyses of ozonesonde observations made in Huntsville, AL, during the peak ozone season (May to September) in 2013 indicate that ozone in the planetary boundary layer was significantly lower than the climatological average, especially in July and August when the Southeastern United States (SEUS) experienced unusually cool and wet weather. Because of a large influence of the lower stratosphere, however, upper tropospheric ozone was mostly higher than climatology, especially from May to July. Tropospheric ozone anomalies were strongly anticorrelated (or correlated) with water vapor (or temperature) anomalies with a correlation coefficient mostly about 0.6 throughout the entire troposphere. The regression slopes between ozone and temperature anomalies for surface up to midtroposphere are within 3.0-4.1 ppbv K-1. The occurrence rates of tropospheric ozone laminae due to STT are >= 50% in May and June and about 30% in July, August, and September suggesting that the stratospheric influence on free-tropospheric ozone could be significant during early summer. These STT laminae have a mean maximum ozone enhancement over the climatology of 52 +/- 33% (35 +/- 24 ppbv) with a mean minimum relative humidity of 2.3 +/- 1.7%.

Meteorology & Atmospheric Sciences

Physical Sciences

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Details

Title: Subtitle: Ozone Variability and Anomalies Observed During SENEX and SEAC4RS Campaigns in 2013
Creators: Shi Kuang - University of Alabama in Huntsville
Michael J. Newchurch - University of Alabama in Huntsville
Anne M. Thompson - Goddard Space Flight Center
Ryan M. Stauffer - Goddard Space Flight Center
Bryan J. Johnson - NOAA Earth System Research Laboratory
Lihua Wang - University of Alabama in Huntsville
Resource Type: Journal article
Publication Details: Journal of geophysical research. Atmospheres, Vol.122(20), pp.11227-11241
DOI: 10.1002/2017JD027139
PMID: 30057866
PMCID: PMC6058320
NLM abbreviation: J Geophys Res Atmos
ISSN: 2169-897X
eISSN: 2169-8996
Publisher: Amer Geophysical Union
Number of pages: 15
Grant note: NNX15AD37G / TOLNet program NNX12AF05G / Penn State University NASA/GSFC; National Aeronautics & Space Administration (NASA) NOAA; National Oceanic Atmospheric Admin (NOAA) - USA NNX13AL89G / SEAC4RS program
Language: English
Date published: 10/27/2017
Academic Unit: Iowa Technology Institute
Record Identifier: 9984721115302771

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