Seasonal variation of atmospheric particle number concentrations, new
particle formation and atmospheric oxidation capacity at the high Arctic
site Villum Research Station, Station Nord

Nguyen, Quynh T.; Glasius, Marianne; Sørensen, Lise Lotte; Jensen, Bente Thoft; Skov, Henrik; Birmili, W.; Wiedensohler, Alfred; Kristensson, Adam; Nøjgaard, Jacob Klenø; Maßling, Andreas

doi:10.5194/acp-16-11319-2016

Cited by 75 publications

(115 citation statements)

References 74 publications

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“…Zeppelin indicate the existence of an annual cycle that spans the high Arctic. This assumption is corroborated by Nguyen et al (2016), who reported comparable yearly cycles of number concentrations and PNSDs from the Villum Research Station in northern Greenland, only differing in more pronounced Aitken modes in the summer months. The shape of the yearly cycle of N CN and the most often occurring PNSDs observed in Tiksi, Russia, described in Asmi et al (2016), were again similar to those observed at Mt.…”

supporting

confidence: 73%

Measurements of aerosol and CCN properties in the Mackenzie River delta (Canadian Arctic) during spring–summer transition in May 2014

et al. 2018

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Abstract. Within the framework of the RACEPAC (Radiation-Aerosol-Cloud Experiment in the Arctic Circle) project, the Arctic aerosol, arriving at a ground-based station in Tuktoyaktuk (Mackenzie River delta area, Canada), was characterized during a period of 3 weeks in May 2014. Basic meteorological parameters and particle number size distributions (PNSDs) were observed and two distinct types of air masses were found. One type were typical Arctic haze air masses, termed accumulation-type air masses, characterized by a monomodal PNSD with a pronounced accumulation mode at sizes above 100 nm. These air masses were observed during a period when back trajectories indicate an air mass origin in the north-east of Canada. The other air mass type is characterized by a bimodal PNSD with a clear minimum around 90 nm and with an Aitken mode consisting of freshly formed aerosol particles. Back trajectories indicate that these air masses, termed Aitken-type air masses, originated from the North Pacific. In addition, the application of the PSCF receptor model shows that air masses with their origin in active fire areas in central Canada and Siberia, in areas of industrial anthropogenic pollution (Norilsk and Prudhoe Bay Oil Field) and the north-west Pacific have enhanced total particle number concentrations (N CN ). Generally, N CN ranged from 20 to 500 cm −3 , while cloud condensation nuclei (CCN) number concentrations were found to cover a range from less than 10 up to 250 cm −3 for a supersaturation (SS) between 0.1 and 0.7 %. The hygroscopicity parameter κ of the CCN was determined to be 0.23 on average and variations in κ were largely attributed to measurement uncertainties.Furthermore, simultaneous PNSD measurements at the ground station and on the Polar 6 research aircraft were performed. We found a good agreement of ground-based PNSDs with those measured between 200 and 1200 m. During two of the four overflights, particle number concentrations at 3000 m were found to be up to 20 times higher than those measured below 2000 m; for one of these two flights, PNSDs measured above 2000 m showed a different shape than those measured at lower altitudes. This is indicative of long-range transport from lower latitudes into the Arctic that can advect aerosol from different regions in different heights.

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confidence: 73%

Measurements of aerosol and CCN properties in the Mackenzie River delta (Canadian Arctic) during spring–summer transition in May 2014

et al. 2018

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“…A closer ice edge allows enhanced concentrations (less diluted) of biogenic aerosol precursor gases such as dimethyl sulfide and an increased probability for NPF events (Levasseur, 2013). It should be noted that NPF events were not confined to only Baffin Bay air masses, as for example (Nguyen et al, 2016) reported a higher chance of observing a NPF event at Nord with southerly air masses arriving from over the Greenland Sea. The trajectories that are associated with cluster 4 distributions at Zeppelin according to Fig.…”

Section: Annual Variation In the Aerosol Clustersmentioning

confidence: 99%

“…A comparison of data at Alert indicates that particles between 20 and 100 nm unfiltered by wind direction are 5 % higher than the filtered data, and there is no significant difference between filtered and unfiltered data for particles larger than 100 nm (R. Leaitch, personal communication, 2017). At VRS, NO x measurements detect local pollution from the military base or the cars servicing the station, and the corresponding SMPS measurements during local pollution events, which are typically very short, were removed from the dataset (Nguyen et al, 2016). At Barrow and Tiksi, the risk of contamination of the measurements by pollution from the nearby towns is higher and observations need to be screened carefully.…”

Section: Data and Quality Controlmentioning

confidence: 99%

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Pan-Arctic aerosol number size distributions: seasonality and transport patterns

et al. 2017

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Abstract. The Arctic environment has an amplified response to global climatic change. It is sensitive to human activities that mostly take place elsewhere. For this study, a multi-year set of observed aerosol number size distributions in the diameter range of 10 to 500 nm from five sites around the Arctic Ocean (Alert, Villum Research Station -Station Nord, Zeppelin, Tiksi and Barrow) was assembled and analysed.A cluster analysis of the aerosol number size distributions revealed four distinct distributions. Together with Lagrangian air parcel back-trajectories, they were used to link the observed aerosol number size distributions with a variety of transport regimes. This analysis yields insight into aerosol dynamics, transport and removal processes, on both an intraand an inter-monthly scale. For instance, the relative occurrence of aerosol number size distributions that indicate new particle formation (NPF) event is near zero during the dark months, increases gradually to ∼ 40 % from spring to summer, and then collapses in autumn. Also, the likelihood of Arctic haze aerosols is minimal in summer and peaks in April at all sites.The residence time of accumulation-mode particles in the Arctic troposphere is typically long enough to allow tracking them back to their source regions. Air flow that passes at low altitude over central Siberia and western Russia is associated with relatively high concentrations of accumulationmode particles (N acc ) at all five sites -often above 150 cm −3 .

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“…Understanding OVOCs and their role as SOA precursors is important in the summer Arctic, an environment characterized by low concentrations of accumulation-mode aerosol and frequent ultrafine particle events (19)(20)(21)(22)(23). Low cloud condensation nuclei (CCN) numbers in the summer Arctic make its cloud cover and radiative balance very sensitive to changes in the CCN population (24).…”

mentioning

confidence: 99%

Microlayer source of oxygenated volatile organic compounds in the summertime marine Arctic boundary layer

Mungall

Abbatt

Wentzell

et al. 2017

Proc. Natl. Acad. Sci. U.S.A.

132

142

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Summertime Arctic shipboard observations of oxygenated volatile organic compounds (OVOCs) such as organic acids, key precursors of climatically active secondary organic aerosol (SOA), are consistent with a novel source of OVOCs to the marine boundary layer via chemistry at the sea surface microlayer. Although this source has been studied in a laboratory setting, organic acid emissions from the sea surface microlayer have not previously been observed in ambient marine environments. Correlations between measurements of OVOCs, including high levels of formic acid, in the atmosphere (measured by an online highresolution time-of-flight mass spectrometer) and dissolved organic matter in the ocean point to a marine source for the measured OVOCs. That this source is photomediated is indicated by correlations between the diurnal cycles of the OVOC measurements and solar radiation. In contrast, the OVOCs do not correlate with levels of isoprene, monoterpenes, or dimethyl sulfide. Results from box model calculations are consistent with heterogeneous chemistry as the source of the measured OVOCs. As sea ice retreats and dissolved organic carbon inputs to the Arctic increase, the impact of this source on the summer Arctic atmosphere is likely to increase. Globally, this source should be assessed in other marine environments to quantify its impact on OVOC and SOA burdens in the atmosphere, and ultimately on climate.Arctic | chemical ionization mass spectrometry | oxygenated volatile organic compounds | sea surface microlayer | marine boundary layer

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Seasonal variation of atmospheric particle number concentrations, new particle formation and atmospheric oxidation capacity at the high Arctic site Villum Research Station, Station Nord

Cited by 75 publications

References 74 publications

Measurements of aerosol and CCN properties in the Mackenzie River delta (Canadian Arctic) during spring–summer transition in May 2014

Measurements of aerosol and CCN properties in the Mackenzie River delta (Canadian Arctic) during spring–summer transition in May 2014

Pan-Arctic aerosol number size distributions: seasonality and transport patterns

Microlayer source of oxygenated volatile organic compounds in the summertime marine Arctic boundary layer

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