Data quality through a web-based QA/QC system: implementation for atmospheric mercury data from the global mercury observation system

D’Amore, Francesco; Bencardino, Mariantonia; Cinnirella, Sergio; Sprovieri, Francesca; Pirrone, Nicola

doi:10.1039/c5em00205b

Cited by 37 publications

(31 citation statements)

References 16 publications

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“…A software program was developed at the LGGE (Laboratoire de Glaciologie et Géophysique de l'Environnement) following quality control practice commonly applied in North American networks (Steffen et al, 2012). Based on various flagging criteria (Munthe et al, 2011;D'Amore et al, 2015), it enabled rapid data processing in order to produce clean time series of Hg(0). According to the instrument manual, the detection limit is 0.10 ng m −3 (Tekran, 2011).…”

Section: Hg(0) Measurementsmentioning

confidence: 99%

Multi-year record of atmospheric mercury at Dumont d'Urville, East Antarctic coast: continental outflow and oceanic influences

et al. 2016

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Abstract. Under the framework of the Global Mercury Observation System (GMOS) project, a 3.5-year record of atmospheric gaseous elemental mercury (Hg(0)) has been gathered at Dumont d'Urville (DDU, 66 • 40 S, 140 • 01 E, 43 m above sea level) on the East Antarctic coast. Additionally, surface snow samples were collected in February 2009 during a traverse between Concordia Station located on the East Antarctic plateau and DDU. The record of atmospheric Hg(0) at DDU reveals particularities that are not seen at other coastal sites: a gradual decrease of concentrations over the course of winter, and a daily maximum concentration around midday in summer. Additionally, total mercury concentrations in surface snow samples were particularly elevated near DDU (up to 194.4 ng L −1 ) as compared to measurements at other coastal Antarctic sites. These differences can be explained by the more frequent arrival of inland air masses at DDU than at other coastal sites. This confirms the influence of processes observed on the Antarctic plateau on the cycle of atmospheric mercury at a continental scale, especially in areas subject to recurrent katabatic winds. DDU is also influenced by oceanic air masses and our data suggest that the ocean plays a dual role on Hg (0) concentrations. The open ocean may represent a source of atmospheric Hg(0) in summer whereas the sea-ice surface may provide reactive halogens in spring that can oxidize Hg(0). This paper also discusses implications for coastal Antarctic ecosystems and for the cycle of atmospheric mercury in high southern latitudes.

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Section: Hg(0) Measurementsmentioning

confidence: 99%

Multi-year record of atmospheric mercury at Dumont d'Urville, East Antarctic coast: continental outflow and oceanic influences

et al. 2016

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“…1). A comparison was made between monthly averaged values of TGM observations and monthly Hg in precipitation (Aas and Bohlin-Nizzetto, 2015;D'Amore et al, 2015). Monthly averages were used because the measurement frequency was not the same at all the sites.…”

Section: Measurement Networkmentioning

confidence: 99%

Sensitivity model study of regional mercury dispersion in the atmosphere

et al. 2017

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Abstract. Atmospheric deposition is the most important pathway by which Hg reaches marine ecosystems, where it can be methylated and enter the base of food chain. The deposition, transport and chemical interactions of atmospheric Hg have been simulated over Europe for the year 2013 in the framework of the Global Mercury Observation System (GMOS) project, performing 14 different model sensitivity tests using two high-resolution three-dimensional chemical transport models (CTMs), varying the anthropogenic emission datasets, atmospheric Br input fields, Hg oxidation schemes and modelling domain boundary condition input. Sensitivity simulation results were compared with observations from 28 monitoring sites in Europe to assess model performance and particularly to analyse the influence of anthropogenic emission speciation and the Hg 0 (g) atmospheric oxidation mechanism. The contribution of anthropogenic Hg emissions, their speciation and vertical distribution are crucial to the simulated concentration and deposition fields, as is also the choice of Hg 0 (g) oxidation pathway. The areas most sensitive to changes in Hg emission speciation and the emission vertical distribution are those near major sources, but also the Aegean and the Black seas, the English Channel, the Skagerrak Strait and the northern German coast. Considerable influence was found also evident over the Mediterranean, the North Sea and Baltic Sea and some influence is seen over continental Europe, while this difference is least over the north-western part of the modelling domain, which includes the Norwegian Sea and Iceland. The Br oxidation pathway produces more Hg II (g) in the lower model levels, but overall wet deposition is lower in comparison to the simulations which employ an O 3 / OH oxidation mechanism. The necessity to perform continuous measurements of speciated Hg and to investigate the local impacts of Hg emissions and deposition, as well as interactions dependent on land use and vegetation, forests, peat bogs, etc., is highlighted in this study.

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“…Generally, ALS is located on the low-latitude highlands of Yunnan in southwestern China which is subject to the interactions between the EASM and the ISM, although most of time, the air flow of Yunnan is mainly controlled by the ISM during the ISM period. However, the strengthening of the EASM or the weakening of the ISM can also spur the EASM to control this area and bring precipitation during the ISM period (Fan et al, 2013). Therefore, the TGM level should be sensitive to the strengthening/weakening of the two monsoons.…”

Section: Seasonal Variation Of Tgm Gom and Pbmmentioning

confidence: 99%

“…During the non-ISM period (from October to April), the dry and cold air masses from Siberia and central Asia move through mainland China into the Pacific Ocean via the westerlies (Hsu, 2005;Fan et al, 2013;Yu et al, 2015). The monsoonal wind changes play an important role in the transport of regional Hg emissions in southeast and east Asia (Sheu et al, 2010;Tseng et al, 2012;Lee et al, 2016).…”

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confidence: 99%

Monsoon-facilitated characteristics and transport of atmospheric mercury at a high-altitude background site in southwestern China

Hui

Lin

et al. 2016

Atmos. Chem. Phys.

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Abstract. To better understand the influence of monsoonal climate and transport of atmospheric mercury (Hg) in southwestern China, measurements of total gaseous mercury (TGM, defined as the sum of gaseous elemental mercury, GEM, and gaseous oxidized mercury, GOM), particulate bound mercury (PBM) and GOM were carried out at Ailaoshan Station (ALS, 2450 m a.s.l.) in southwestern China from May 2011 to May 2012. The mean concentrations (± SD) for TGM, GOM and PBM were 2.09 ± 0.63, 2.2 ± 2.3 and 31.3 ± 28.4 pg m −3 , respectively. TGM showed a monsoonal distribution pattern with relatively higher concentrations (2.22 ± 0.58 ng m −3 , p = 0.021) during the Indian summer monsoon (ISM, from May to September) and the east Asia summer monsoon (EASM, from May to September) periods than that (1.99 ± 0.66 ng m −3 ) in the non-ISM period. Similarly, GOM and PBM concentrations were higher during the ISM period than during the non-ISM period. This study suggests that the ISM and the EASM have a strong impact on longrange and transboundary transport of Hg between southwestern China and south and southeast Asia. Several high TGM events were accompanied by the occurrence of northern wind during the ISM period, indicating anthropogenic Hg emissions from inland China could rapidly increase TGM levels at ALS due to strengthening of the EASM. Most of the TGM and PBM events occurred at ALS during the non-ISM period. Meanwhile, high CO concentrations were also observed at ALS, indicating that a strong south tributary of westerlies could have transported Hg from south and southeast Asia to southwestern China during the non-ISM period. The biomass burning in southeast Asia and anthropogenic Hg emissions from south Asia are thought to be the source of atmospheric Hg in remote areas of southwestern China during the non-ISM period.

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Data quality through a web-based QA/QC system: implementation for atmospheric mercury data from the global mercury observation system

Cited by 37 publications

References 16 publications

Multi-year record of atmospheric mercury at Dumont d'Urville, East Antarctic coast: continental outflow and oceanic influences

Multi-year record of atmospheric mercury at Dumont d'Urville, East Antarctic coast: continental outflow and oceanic influences

Sensitivity model study of regional mercury dispersion in the atmosphere

Monsoon-facilitated characteristics and transport of atmospheric mercury at a high-altitude background site in southwestern China

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