Source and meteorological influences on air quality (CO, CH4 &amp; CO2) at a Southern Hemisphere urban site

Buchholz, Rebecca R.; Paton-Walsh, Clare; Griffith, David; Kubistin, Dagmar; Caldow, Christopher; Fisher, Jenny A.; Deutscher, Nicholas M.; Kettlewell, Graham; Riggenbach, M.; Macatangay, Ronald; Krummel, P. B.; Langenfelds, Ray L.

doi:10.1016/j.atmosenv.2015.11.041

Cited by 57 publications

(50 citation statements)

References 70 publications

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“…Additional instruments were operated nearby at the University of Wollongong's main campus (at 34.406 • S, 150.897 • E) (Buchholz et al, 2016) and at the nearby Science Centre (34.401 • S, 150.900 • E), but the observations are not included here. Data from the University of Wollongong include retrievals of total column amounts of trace gases from the Total Carbon Column Observing Network (http://www.…”

Section: Additional Measurementsmentioning

confidence: 99%

“…In theory, the instrument could be retrospectively recalibrated at the higher temperatures, but since all other instruments had been switched off in the heat, this was not attempted. In addition to the instrument at the main MUMBA site, another FTIR trace gas analyser was operated throughout the campaign at the main campus of the University of Wollongong (Buchholz et al, 2016).…”

Section: A3 Fourier Transform Infrared (Ftir) Trace Gas Analysersmentioning

confidence: 99%

“…The primary focus of these studies was to test the prediction of ozone levels in the urban environment (Cope et al, 2005). More recent studies have examined regional air quality in Wollongong (Buchholz et al, 2016) and the effect of a major fire event on air quality in Sydney and Wollongong (Rea et al, 2016). There have also been Australian campaigns focused on understanding aerosol formation and composition in the urban environment, e.g.…”

Section: Introductionmentioning

confidence: 99%

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The MUMBA campaign: measurements of urban, marine and biogenic air

Paton-Walsh

Guérette

Kubistin

et al. 2017

Earth Syst. Sci. Data

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Abstract. The Measurements of Urban, Marine and Biogenic Air (MUMBA) campaign took place in Wollongong, New South Wales (a small coastal city approximately 80 km south of Sydney, Australia) from 21 December 2012 to 15 February 2013. Like many Australian cities, Wollongong is surrounded by dense eucalyptus forest, so the urban airshed is heavily influenced by biogenic emissions. Instruments were deployed during MUMBA to measure the gaseous and aerosol composition of the atmosphere with the aim of providing a detailed characterisation of the complex environment of the ocean–forest–urban interface that could be used to test the skill of atmospheric models. The gases measured included ozone, oxides of nitrogen, carbon monoxide, carbon dioxide, methane and many of the most abundant volatile organic compounds. The aerosol characterisation included total particle counts above 3 nm, total cloud condensation nuclei counts, mass concentration, number concentration size distribution, aerosol chemical analyses and elemental analysis.The campaign captured varied meteorological conditions, including two extreme heat events, providing a potentially valuable test for models of future air quality in a warmer climate. There was also an episode when the site sampled clean marine air for many hours, providing a useful additional measure of the background concentrations of these trace gases within this poorly sampled region of the globe. In this paper we describe the campaign, the meteorology and the resulting observations of atmospheric composition in general terms in order to equip the reader with a sufficient understanding of the Wollongong regional influences to use the MUMBA datasets as a case study for testing a chemical transport model. The data are available from PANGAEA (http://doi.pangaea.de/10.1594/PANGAEA.871982).

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Section: Additional Measurementsmentioning

confidence: 99%

Section: A3 Fourier Transform Infrared (Ftir) Trace Gas Analysersmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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The MUMBA campaign: measurements of urban, marine and biogenic air

Paton-Walsh

Guérette

Kubistin

et al. 2017

Earth Syst. Sci. Data

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“…Biogenic emissions are also expected to be large in austral summer (DecemberFebruary) in northern and southeastern Australia (Guenther et al, 2012;Bauwens et al, 2016), although the magnitude of the biogenic enhancement remains uncertain (Emmerson et al, 2016). As local emissions are generally low, Australasian tropospheric composition is frequently impacted by intercontinental transport of air masses from elsewhere in the Southern Hemisphere (Gloudemans et al, 2006;Zeng et al, 2012;Buchholz et al, 2016). Significant attention has been paid to transported biomass burning plumes (e.g., Pak et al, 2003;Gloudemans et al, 2006;Edwards et al, 2006;Zeng et al, 2012).…”

Section: Implications For Global Evaluation With Observationsmentioning

confidence: 99%

Improved method for linear carbon monoxide simulation and source attribution in atmospheric chemistry models illustrated using GEOS-Chem v9

et al. 2017

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Abstract. Carbon monoxide (CO) simulation in atmospheric chemistry models is frequently used for source-receptor analysis, emission inversion, interpretation of observations, and chemical forecasting due to its computational efficiency and ability to quantitatively link simulated CO burdens to sources. While several methods exist for modeling CO source attribution, most are inappropriate for regions where the CO budget is dominated by secondary production rather than direct emissions. Here, we introduce a major update to the linear CO-only capability in the GEOS-Chem chemical transport model that for the first time allows sourceregion tagging of secondary CO produced from oxidation of non-methane volatile organic compounds. Our updates also remove fundamental inconsistencies between the CO-only simulation and the standard full chemistry simulation by using consistent CO production rates in both. We find that relative to the standard chemistry simulation, CO in the original CO-only simulation was overestimated by more than 100 ppb in the model surface layer and underestimated in outflow regions. The improved CO-only simulation largely resolves these discrepancies by improving both the magnitude and location of secondary production. Despite large differences between the original and improved simulations, however, model evaluation with the global dataset used to benchmark GEOS-Chem shows negligible change to the model's ability to match the observations. This suggests that the current GEOS-Chem benchmark is not well suited to evaluate model changes in regions influenced by biogenic emissions and chemistry, and expanding the dataset to include observations from biogenic source regions (including those from recent aircraft campaigns) should be a priority for the GEOSChem community. Using Australasia as a case study, we show that the new ability to geographically tag secondary CO production provides significant added value for interpreting observations and model results in regions where primary CO emissions are low. Secondary production dominates the CO budget across much of the world, especially in the Southern Hemisphere, and we recommend future model-observation and multi-model comparisons implement this capability to provide a more complete understanding of CO sources and their variability.

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“…11 has a small, negative trend and a stronger seasonal cycle with a summer minimum due to OH oxidation and a springtime peak attributed to CO transported from Southern Hemisphere biomass burning sources (Buchholz et al, 2016). Figure 12 shows the time series of the remaining retrieved species.…”

Section: Time Series Of Retrieved Speciesmentioning

confidence: 99%

The Total Carbon Column Observing Network site description for Lauder, New Zealand

Pollard

Sherlock

Robinson

et al. 2017

Earth Syst. Sci. Data

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Abstract. In this paper we describe the retrievals of atmospheric trace gases from near-infrared, high-resolution solar absorption spectroscopy measurements at the Lauder atmospheric research station in New Zealand and submitted to the Total Carbon Column Observing Network (TCCON) archive.The Lauder site (45.034 • S, 169.68 • E, 370 m a.s.l.) is located within a sparsely populated region of the South Island of New Zealand and is sheltered from the prevailing wind direction by the Southern Alps, which gives the site a high number of clear-sky days and an air mass that is largely unmodified by regional anthropogenic sources. The Lauder TCCON archive consists of data from two instruments: a Bruker IFS 120HR from June 2004 to February 2010 and a Bruker IFS 125HR from February 2010 to present. The bias between the two instruments is assessed to be 0.068 % for CO 2 . Since measurements using the IFS 125HR began, the SD about the hourly mean has been better than 0.1 % for 96.81 % of CO 2 column retrievals.The retrievals have been calibrated against in situ airborne measurements to correct for biases and provide traceability to the World Meteorological Organization (WMO) scales with an accuracy of 0.1 % for CO 2 .The Lauder TCCON time series of retrieved dry-air mole fractions of CO 2 , CH 4 , N 2 O, HF, H 2 O, HDO and CO are available from the TCCON data archive.The DOIs are https://doi

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Source and meteorological influences on air quality (CO, CH4 & CO2) at a Southern Hemisphere urban site

Cited by 57 publications

References 70 publications

The MUMBA campaign: measurements of urban, marine and biogenic air

The MUMBA campaign: measurements of urban, marine and biogenic air

Improved method for linear carbon monoxide simulation and source attribution in atmospheric chemistry models illustrated using GEOS-Chem v9

The Total Carbon Column Observing Network site description for Lauder, New Zealand

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