The background levels of the summer tropospheric aerosol and trace gases in Greenland

Flyger, H.; Heidam, Niels Z.; Hansen, Knud A.; Rasmussen, L. E.; Megaw, W.J.

doi:10.1016/0021-8502(80)90149-4

Cited by 19 publications

(9 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Atmospheric measurements were carried out at Station Nord the first time in the late 1970s (Flyger et al, 1980) and have taken place continuously since the late 1990s (Heidam et al, 2004). Station Nord is located in a remote area in northeast Greenland at 81 • 36 N, 16 • 40 W (Fig.…”

Section: Logisticsmentioning

confidence: 99%

“…About three decades ago, it was discovered, that a considerable part of the Arctic atmosphere becomes highly polluted during winter because of the accumulation of Eurasian pollutants, creating what became generally known as "Arctic haze" (Flyger et al, 1980;Barrie et al, 1981;Heidam et al, 2004;Glasow and Crutzen, 2007). Arctic haze aerosols consist primarily of sulphate (SO 2− 4 ) and particulate organic matter in addition to ammonium (NH + 4 ), nitrate (NO − 3 ) and black carbon (BC) (e.g.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Sources of anions in aerosols in northeast Greenland during late winter

et al. 2013

View full text Add to dashboard Cite

The knowledge of climate effects of atmospheric aerosols is associated with large uncertainty, and a better understanding of their physical and chemical properties is needed, especially in the Arctic environment. The objective of the present study is to improve our understanding of the processes affecting the composition of aerosols in the high Arctic. Therefore size-segregated aerosols were sampled at a high Arctic site, Station Nord (Northeast Greenland), in March 2009 using a Micro Orifice Uniform Deposit Impactor. The aerosol samples were extracted in order to analyse three water-soluble anions: chloride, nitrate and sulphate. The results are discussed based on possible chemical and physical transformations as well as transport patterns. The total concentrations of the ions at Station Nord were 53–507 ng m−3, 2–298 ng m−3 and 535–1087 ng m−3 for chloride (Cl−), nitrate (NO3−) and sulphate (SO42−), respectively. The aerosols in late winter/early spring, after polar sunrise, are found to be a mixture of long-range transported and regional to local originating aerosols. Fine particles, smaller than 1 μm, containing SO42−, Cl− and NO3−, are hypothesized to originate from long-range transport, where SO42− is by far the dominating anion accounting for 50–85% of the analyzed mass. The analysis suggests that Cl− and NO3− in coarser particles (> 1.5 μm) originate from local/regional sources. Under conditions where the air mass is transported over sea ice at high wind speeds, very coarse particles (> 18 μm) are observed, and it is hypothesized that frost flowers on the sea ice are a source of the very coarse nitrate particles

show abstract

Section: Logisticsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Sources of anions in aerosols in northeast Greenland during late winter

et al. 2013

View full text Add to dashboard Cite

show abstract

“…In the Arctic, the so‐called Arctic haze phenomenon, which is due to atmospheric pollution of distant latitude origin, is widespread during winter‐springtime [ Barrie et al ., ; Flyger et al ., ; Heidam et al ., ; Nguyen et al ., ; Pacyna et al ., ; Quinn et al ., ]. The haze is formed due to several seasonal‐dependent mechanisms.…”

Section: Introductionmentioning

confidence: 99%

Characterization of humic‐like substances in Arctic aerosols

et al. 2014

View full text Add to dashboard Cite

Humic-like substances (HULIS) are a complex group of relatively high molecular weight organic compounds which contribute considerably to the mass of organic carbon (OC) and influence the light-absorbing properties of aerosols. In this work, HULIS were investigated for the first time in the high-Arctic atmosphere, focusing on the chemical characterization and mass contribution of HULIS to the total suspended particle (TSP) mass using weekly aerosol samples collected at Station Nord, northeast Greenland every fourth week during 2010. Average HULIS-C concentration was 11 ng C m À3 during the darker months (November-April) and 4 ng C m À3during the other months (May-October) with an annual mass concentration of 0.02 ± 0.01 μg m À3. HULIS-C contributed to 3-16% of water-soluble organic carbon (WSOC), whereas HULIS accounted for 0.7-4.1% of TSP mass, with TSP typically below 1.0 μg m À3. Concentrations of OC, WSOC, HULIS, selected HULIS functional groups (carboxylic acids, aromatic carboxylic acids, and organosulfates) and levoglucosan overlapped with the typical Arctic haze pattern with elevated concentrations during winter to early spring. The aromatic carboxylic acid portion accounted for a larger share of total carboxylic acid of HULIS during the darker months (7%) compared to the brighter months (3%). The more abundant aromatic carboxylic acid functional groups and the moderate correlation between HULIS and levoglucosan concentrations during the darker months both indicate that biomass burning aerosols and thereby emissions of aromatic compounds could contribute to HULIS in the Arctic, especially during late winter. During the brighter months, relatively higher average molecular weight of HULIS was observed.

show abstract

“…(Heidam et al, 1999Flyger et al, 1980;Barrie et al, 1981;Pacyna et al, 1984;Bourgeois and Bey, 2011). The phenomenon which is known as Arctic haze is widespread throughout the Arctic during wintertime.…”

Section: Introductionmentioning

confidence: 99%

Source apportionment of particles at Station Nord, North East Greenland during 2008–2010 using COPREM and PMF analysis

et al. 2013

View full text Add to dashboard Cite

Abstract. In order to develop strategies for controlling and reducing Arctic air pollution, there is a need to understand the basic mechanisms for determining the fate of air pollution in the Arctic. Sources of atmospheric particles at Station Nord (81 • 36 N, 16 • 40 W) in North East Greenland were evaluated for a two-year period from March 2008 to February 2010. Source apportionment using Positive Matrix Factorization (PMF) and COnstrained Physical REceptor Model (COPREM) was based on measurements of black carbon, elements (Al, Si, S, K, Ca, Ti, V, Cr, Mn, Fe, Ni, Cu, Zn, Ga, As, Se, Br, Rb, Sr, Zr, Pb) and inorganic ions (SO 2 , SO 2− 4 , Na + , NH + 4 , NO − 3 , Cl − ). In general, source apportionment results by PMF and COPREM showed good agreement. Five sources adequately explained the measurements, which included a Marine and a Soil source of natural origin and three additional anthropogenic sources, which were all influenced by metal industries. One anthropogenic source was dominated by Zn of which air mass back trajectories using the Hybrid Single Particle Lagrangian Integrated Trajectory (HYS-PLIT) model suggested a Canadian Arctic origin, despite certain influences from Southern and Eastern origins. Another anthropogenic source was characterised by high concentrations of Pb and As, which has been historically referred to as a Combustion source at Station Nord. The impacts of largescale industry in Siberia, Russia were evident through high Cu concentrations in both the Combustion source and an additional Cu/Ni source.Br correlated well with the anthropogenic species S and Pb though the elements are unlikely to have a common origin. More likely, sulphuric acid aerosols serve as transport containers for Br species of marine origin. Of particular relevance to climate, sources of black carbon were identified to be mainly anthropogenic and most probably of Siberian origin (80-98 %).

show abstract

The background levels of the summer tropospheric aerosol and trace gases in Greenland

Cited by 19 publications

References 16 publications

Sources of anions in aerosols in northeast Greenland during late winter

Sources of anions in aerosols in northeast Greenland during late winter

Characterization of humic‐like substances in Arctic aerosols

Source apportionment of particles at Station Nord, North East Greenland during 2008–2010 using COPREM and PMF analysis

Contact Info

Product

Resources

About