Sources and elemental composition of summer aerosols in the Larsemann Hills (Antarctica)

Budhavant, Krishnakant; Safai, P.D.; Rao, P. S. P.

doi:10.1007/s11356-014-3452-0

Cited by 23 publications

(20 citation statements)

References 51 publications

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“…Thus most of the particle mass were in the coarse mode, and the increasing primary emissions with wind were the main cause for the deviation of average and median mass concentration values. Also previous studies have reported relatively similar mass concentrations on the order of some μg m −3 measured at the Antarctic coastal sites (Artaxo and Rabello, 1992;Mazzera et al, 2001;Chaubey et al, 2011;Budhavant et al, 2015), yet not such a significant increase towards the coarse mode was observed before. All studies, however, are consistent with mass concentration seasonal cycle showing higher values in winter.…”

Section: Discussionmentioning

confidence: 56%

“…Also it should be noted that calcium is not the best marker for mineral dust due to its presence in the seawater. It has also been found to be significantly enriched in Antarctic coasts and seawater, which suggests additional anthropogenic sources of Ca 2+ are present (Préndez et al, 2009;Budhavant et al, 2015). Calcium enrichment has also been observed in the Arctic as suggested by very recent evidence by Salter et al (2016).…”

Section: Chemical Compositionmentioning

confidence: 83%

“…The aerosol mass concentrations are the highest in coastal regions. Budhavant et al (2015) showed that an average (i.e. arithmetic mean throughout the text) PM 2.5 (Particulate Mass < 2.5 µm aerodynamic equivalent diameter) and PM 10 (Particulate Mass <10 µm aerodynamic equivalent diameter) concentrations during summer were 4.3 and 5.1 μg m −3 , respectively, with main chemical species of sea salt, sulphate and some crustal components.…”

Section: Introductionmentioning

confidence: 99%

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Primary sources control the variability of aerosol optical properties in the Antarctic Peninsula

Asmi

Neitola

Teinilä

et al. 2018

Tellus B: Chemical and Physical Meteorology

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Aerosol particle optical properties were measured continuously between years 2013-2015 at the Marambio station in the Antarctic Peninsula. Annual cycles of particle scattering and absorption were studied and explained using measured particle chemical composition and the analysis of air mass transport patterns. The particle scattering was found elevated during the winter but the absorption did not show any clear annual cycle. The aerosol single scattering albedo at λ = 637 nm was on average 0.96 ± 0.10, with a median of 0.99. Aerosol scattering Ångström exponent increased during summer, indicating an increasing fraction of fine mode particles. The aerosol was mainly composed of sea salt, sulphate and crustal soil minerals, and most of the particle mass were in the coarse mode. Both the particle absorption and scattering were increased during high wind speeds. This was explained by the dominance of the primary marine sea-spray and wind-blown soil dust sources. In contrast, the back-trajectory analysis suggested that long-range transport has only a minor role as a source of absorbing aerosol at the peninsula.

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Section: Discussionmentioning

confidence: 56%

Section: Chemical Compositionmentioning

confidence: 83%

Section: Introductionmentioning

confidence: 99%

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Primary sources control the variability of aerosol optical properties in the Antarctic Peninsula

Asmi

Neitola

Teinilä

et al. 2018

Tellus B: Chemical and Physical Meteorology

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“…S6) during the austral summer period, the growth of DMS(P)rich Phaeocystis may therefore be more favorable in the Bellingshausen Sea. Sea-surface warming and freshening is commonly associated with a shallowing of the mixed layer depth (Capotondi et al, 2012). The warming trend has shown the spatial complexity across the Antarctic Ocean in recent decades (Turner et al, 2005).…”

Section: Resultsmentioning

confidence: 99%

New particle formation events observed at the King Sejong Station, Antarctic Peninsula – Part 2: Link with the oceanic biological activities

et al. 2019

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Marine biota is an important source of atmospheric aerosol particles in the remote marine atmosphere. However, the relationship between new particle formation and marine biota is poorly quantified. Long-term observations (from 2009 to 2016) of the physical properties of atmospheric aerosol particles measured at the Antarctic Peninsula (King Sejong Station; 62.2 • S, 58.8 • W) and satellitederived estimates of the biological characteristics were analyzed to identify the link between new particle formation and marine biota. New particle formation events in the Antarctic atmosphere showed distinct seasonal variations, with the highest values occurring when the air mass originated from the ocean domain during the productive austral summer (December, January and February). Interestingly, new particle formation events were more frequent in the air masses that originated from the Bellingshausen Sea than in those that originated from the Weddell Sea. The monthly mean number concentration of nanoparticles (2.5-10 nm in diameter) was > 2-fold higher when the air masses passed over the Bellingshausen Sea than the Weddell Sea, whereas the biomass of phytoplankton in the Weddell Sea was more than ∼ 70 % higher than that of the Bellingshausen Sea during the austral summer period. Dimethyl sulfide (DMS) is of marine origin and its oxidative products are known to be one of the major components in the formation of new particles. Both satellitederived estimates of the biological characteristics (dimethylsulfoniopropionate, DMSP; precursor of DMS) and phyto-plankton taxonomic composition and in situ methanesulfonic acid (84 daily measurements during the summer period in 2013 and 2014) analysis revealed that DMS(P)-rich phytoplankton were more dominant in the Bellingshausen Sea than in the Weddell Sea. Furthermore, the number concentration of nanoparticles was positively correlated with the biomass of phytoplankton during the period when DMS(P)-rich phytoplankton predominate. These results indicate that oceanic DMS emissions could play a key role in the formation of new particles; moreover, the taxonomic composition of phytoplankton could affect the formation of new particles in the Antarctic Ocean.

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“…Based on the measurements over Maitri, Gadhavi and Jayaraman (2004) reported that the total aerosol mass concentration at surface level is of 7 µg m -3 for the PM10 particles with significant (day-to-day) variations. Based on the measurement during the 2009-2010, Budhavant et al (2015 reported that the mean mass concentration for PM10 aerosols over southern ocean was found to be 13.4 µg m -3 and over coastal Antarctica near Bharati was found to be 5.13 µg m -3 . They further reported that the elements of anthropogenic origin (Eg.…”

Section: Indian Efforts On Aerosol Studies Over Antarcticamentioning

confidence: 99%

Aerosol Studies from on and around Antarctica

Babu¹

2017

Proceedings of the Indian National Science Academy

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Antarctica provides an excellent environment to examine the natural and background aerosols in the atmosphere over snow and ice. The Indian efforts (metrological measurements) at Antarctica were initiated with the establishment of the first Antarctic station in Eastern Antarctica during the first Indian Scientific Expedition to Antarctica (ISEA) IntroductionAntarctica provides an excellent environment to examine the natural and background aerosols in the atmosphere over snow and ice. Besides that, the large ice sheet of the Antarctic continent affects atmospheric circulation patterns over this region, which affects the transport and removal of the aerosol particles (Shaw, 1979). In the recent years, with the increase in human interventions (exploratory, scientific and tourism) in Antarctica, there is an increase in the emissions of anthropogenic species (including aerosols) (Shaw, 1979;Tomasi et al., 2007). Overall, aerosol over Antarctica consists mainly of the transported components either from the Oceans or from the surrounding continents. It mainly consists of aged aerosols. Large variations in the columnar aerosol loading over Antarctica are also reported during the periods of strong volcanic eruption of El Chichon (1982) and Mt. Pinatubo (1991), which also justifies the teleconnection of Antarctica with other regions of the world from transport at higher altitudes and their subsequent influence on the Antarctic aerosols system (Herber et al., 1993;Tomasi et al., 2007).Antarctic aerosol system is studied by several investigators from different countries which include the aerosol properties such as their chemical nature (Savoie et al., 1993;Minikin et al., 1998;Wagenbach et al., 1998;Kerminen et al., 2000), their total number, mass concentrations and size distributions (Samson et al., 1990; Jaenicke et al., 1992; Mazzera et al., 2001; Koponen et al., 2003) their role as cloud condensation nuclei (De Felice et al., 1997); and their chemical mass size distributions (Harvey et al., 1991; Gras, 1993; Ito, 1993;Teinila et al., 2000;Rankin and Wolff, 2003). As far as the columnar aerosol optical depths (AODs) are concerned, Antarctica presents a pristine environment. The first measurements of AOD performed in Antarctica using a Sun photometer were in 1968/69 (Sakunov and Rusin, 1980), while regular measurements have been recorded at South Pole (USA) since 1976 (Bodhaine et al., 1986). AOD over Antarctica at 500 nm varies between 0.01 and 0.06 for the coastal and low-latitude sites and further lower values are reported at the high-latitude sites (Six et al., 2005). Aerosol concentrations varied from few particles cm -3 to few thousands particles cm -3 (Hogan, 1975 442 S Suresh BabuWagenbach et al., 1998;Kerminen et al., 2000). The cyclonic storms revolving around the continent over the oceans bring the marine aerosol in to the Antarctic continent.Concerning the global distribution and importance of black carbon (BC) aerosols, there is a major lack of observations of BC at Antarctica, especially in the India...

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Sources and elemental composition of summer aerosols in the Larsemann Hills (Antarctica)

Cited by 23 publications

References 51 publications

Primary sources control the variability of aerosol optical properties in the Antarctic Peninsula

Primary sources control the variability of aerosol optical properties in the Antarctic Peninsula

New particle formation events observed at the King Sejong Station, Antarctic Peninsula – Part 2: Link with the oceanic biological activities

Aerosol Studies from on and around Antarctica

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