Characterizing the impacts of vertical transport and photochemical ozone production on an exceedance area

Yates, E. L.; Iraci, L. T.; Austerberry, David; Pierce, R. Bradley; Roby, M.; Tadić, Jovan M.; Loewenstein, M.; Gore, Warren J.

doi:10.1016/j.atmosenv.2014.09.002

Cited by 14 publications

(16 citation statements)

References 26 publications

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“…These values offer a good compromise for a wide variety of particulate types (Völger et al, 1996). The actual aerosol composition in the SJV was not measured during CABOTS, but measurements during the 2010 Carbonaceous Aerosols and Radiative Effects Study (CARES) typically found a mix of organics, sulfate, nitrate, ammonium, and soil dust in the northern part of the valley (Zaveri et al, 2012). Smoke from the Soberanes Fire near Big Sur dominated the aerosol mix in the SJV during the second intensive operating period (IOP).…”

Section: Noaa-esrl Topaz Lidarmentioning

confidence: 99%

Intercomparison of lidar, aircraft, and surface ozone measurements in the San Joaquin Valley during the California Baseline Ozone Transport Study (CABOTS)

et al. 2019

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The California Baseline Ozone Transport Study (CABOTS) was conducted in the late spring and summer of 2016 to investigate the influence of long-range transport and stratospheric intrusions on surface ozone (O 3 ) concentrations in California with emphasis on the San Joaquin Valley (SJV), one of two extreme ozone non-attainment areas in the US. One of the major objectives of CABOTS was to characterize the vertical distribution of O 3 and aerosols above the SJV to aid in the identification of elevated transport layers and assess their surface impacts. To this end, the NOAA Earth System Research Laboratory (ESRL) deployed the Tunable Optical Profiler for Aerosol and oZone (TOPAZ) mobile lidar to the Visalia Municipal Airport (36.315 • N, 119.392 • E) in the central SJV between 27 May and 7 August 2016. Here we compare the TOPAZ ozone retrievals with co-located in situ surface measurements and nearby regulatory monitors and also with airborne in situ measurements from the University of California at Davis-Scientific Aviation (SciAv) Mooney and NASA Alpha Jet Atmospheric eXperiment (AJAX) research aircraft. Our analysis shows that the lidar and aircraft measurements agree, on average to within 5 ppbv, the sum of their stated uncertainties of 3 and 2 ppbv, respectively.

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Section: Noaa-esrl Topaz Lidarmentioning

confidence: 99%

Intercomparison of lidar, aircraft, and surface ozone measurements in the San Joaquin Valley during the California Baseline Ozone Transport Study (CABOTS)

et al. 2019

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“…Integration of these datasets requires that the measurements be validated and any potential differences between the various techniques be understood and characterized (Beekmann et al, 1995). In this paper, we compare O3 measurements from the NOAA ESRL Tropospheric Optical Profiler for Aerosol and oZone (TOPAZ) lidar with in-situ measurements from nearby regulatory and research surface monitors, and from instruments flown aboard the UC Davis/Scientific Aviation Mooney (Trousdell et al, 2016) and Alpha Jet research aircraft based at NASA's Ames Research Center (Hamill et al, 2016;Yates et al, 2015). These comparisons, together with those from the multi-lidar (including TOPAZ) and ozonesonde Southern California Ozone Observation Project (SCOOP) intercomparison conducted by the NASA-sponsored Tropospheric Ozone Lidar Network (TOLNet) immediately after CABOTS (Leblanc et al, 2018) provide this validation.…”

Section: Introductionmentioning

confidence: 99%

Intercomparison of lidar, aircraft, and surface ozone measurements in the San Joaquin Valley during the California Baseline Ozone Transport Study (CABOTS)

Langford¹,

Alvarez²,

Kirgis³

et al. 2018

Preprint

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Abstract. The California Baseline Ozone Transport Study (CABOTS) was conducted in the late spring and summer of 2016 to investigate the influence of long-range transport and stratospheric intrusions on surface ozone (O3) concentrations in California with emphasis on the San Joaquin Valley (SJV), one of two extreme ozone non-attainment areas in the U.S. One of the major objectives of CABOTS was to characterize the vertical distribution of O3 and aerosols above the SJV to aid in the identification of elevated transport layers and assess their surface impacts. To this end, the NOAA Earth System Research Laboratory (ESRL) deployed the Tunable Optical Profiler for Aerosol and oZone (TOPAZ) mobile lidar to the Visalia Municipal Airport (36.315° N, −119.392° E) in the central SJV between 27 May and 7 August 2016. Here we compare the TOPAZ ozone and backscatter measurements with co-located in-situ surface measurements and nearby regulatory monitors, and to airborne measurements from the University of California at Davis/Scientific Aviation Mooney and NASA Alpha Jet Atmospheric eXperiment (AJAX) research aircraft. Our analysis shows excellent agreement between the lidar and in-situ measurements, lending confidence to the use of these data sets for more detailed analyses.

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“…Near-surface O 3 variability in California and Nevada is affected by pollutants transported from the free troposphere over the eastern Pacific, as well as the U.S.-emitted O 3 precursors from anthropogenic and natural sources Huang et al, 2010Huang et al, , 2013Lin et al, 2012aLin et al, , 2012bPfister et al, 2008;Langford et al, 2011;Yates et al, 2013Yates et al, , 2014NRC, 2009]. Over the past few decades, observations indicate increasing O 3 trends in the free troposphere in the eastern Pacific and high-altitude remote sites in the western U.S. in spring and summer [e.g., Cooper et al, 2010Cooper et al, , 2012Cooper et al, , 2014Parrish et al, 2009Parrish et al, , 2012Gratz et al, 2014].…”

Section: Introductionmentioning

confidence: 99%

“…Over the past few decades, observations indicate increasing O 3 trends in the free troposphere in the eastern Pacific and high-altitude remote sites in the western U.S. in spring and summer [e.g., Cooper et al, 2010Cooper et al, , 2012Cooper et al, , 2014Parrish et al, 2009Parrish et al, , 2012Gratz et al, 2014]. This trend can be in part due to the increasing contributions from nonlocal sources such as transported Asian pollution, and it may be correlated to the O 3 variability in downwind inland regions [Huang et al, 2010;Parrish et al, 2010;Cooper et al, 2011;Ambrose et al, 2011;Wigder et al, 2013;Yates et al, 2014]. In contrast, decreasing trends in O 3 and its precursor species are found over the populated areas at low altitudes such as California's South Coast and part of the Central Valley [e.g., Pollack et al, 2013;Parrish et al, 2011;Cooper et al, 2014;Pusede and Cohen, 2012].…”

Section: Introductionmentioning

confidence: 99%

Improved western U.S. background ozone estimates via constraining nonlocal and local source contributions using Aura TES and OMI observations

et al. 2015

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Western U.S. near-surface ozone (O 3 ) concentrations are sensitive to transported background O 3 from the eastern Pacific free troposphere, as well as U.S. anthropogenic and natural emissions. The current 75 ppbv U.S. O 3 primary standard may be lowered soon, hence accurately estimating O 3 source contributions, especially background O 3 in this region has growing policy-relevant significance. In this study, we improve the modeled total and background O 3 , via repartitioning and redistributing the contributions from nonlocal and local anthropogenic/wildfires sources in a multi-scale satellite data assimilation system containing global Goddard Earth Observing System-Chemistry model (GEOS-Chem) and regional Sulfur Transport and dEposition Model (STEM). Focusing on NASA's ARCTAS (Arctic Research of the Composition of the Troposphere from Aircraft and Satellites) field campaign period in June-July 2008, we first demonstrate that the negative biases in GEOS-Chem free simulation in the eastern Pacific at 400-900 hPa are reduced via assimilating Aura-Tropospheric Emission Spectrometer (TES) O 3 profiles. Using the TES-constrained boundary conditions, we then assimilated into STEM the tropospheric nitrogen dioxide (NO 2 ) columns from Aura-Ozone Monitoring Instrument to indicate U.S. nitrogen oxides (NO x = NO 2 + NO) emissions at 12 × 12 km 2 grid scale.Improved model skills are indicated from cross validation against independent ARCTAS measurements. Leveraging Aura observations, we show anomalously high wildfire NO x emissions in this summer in Northern California and the Central Valley while lower anthropogenic emissions in multiple urban areas than those representing the year of 2005. We found strong spatial variability of the daily maximum 8 h average background O 3 and its contribution to the modeled total O 3 , with the mean value of~48 ppbv (~77% of the total).

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Characterizing the impacts of vertical transport and photochemical ozone production on an exceedance area

Cited by 14 publications

References 26 publications

Intercomparison of lidar, aircraft, and surface ozone measurements in the San Joaquin Valley during the California Baseline Ozone Transport Study (CABOTS)

Intercomparison of lidar, aircraft, and surface ozone measurements in the San Joaquin Valley during the California Baseline Ozone Transport Study (CABOTS)

Intercomparison of lidar, aircraft, and surface ozone measurements in the San Joaquin Valley during the California Baseline Ozone Transport Study (CABOTS)

Improved western U.S. background ozone estimates via constraining nonlocal and local source contributions using Aura TES and OMI observations

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