Climatology of the three coastal Antarctic stations Dumont d'Urville, Neumayer, and Halley

König-Langlo, Gert; King, J.C.; Pettré, Paul

doi:10.1029/97jd00527

Cited by 152 publications

(151 citation statements)

References 15 publications

(5 reference statements)

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“…6 and 7, and are similar to those described from earlier years (König-Langlo et al, 1998). Figure 6 shows that surface temperatures ranged from around zero during the summer months to almost −50 • C during the late spring.…”

Section: Meteorological Conditions During Chablissupporting

confidence: 70%

Chemistry of the Antarctic Boundary Layer and the Interface with Snow: an overview of the CHABLIS campaign

et al. 2008

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Abstract. CHABLIS (Chemistry of the Antarctic BoundaryLayer and the Interface with Snow) was a collaborative UK research project aimed at probing the detailed chemistry of the Antarctic boundary layer and the exchange of trace gases at the snow surface. The centre-piece to CHABLIS was the measurement campaign, conducted at the British Antarctic Survey station, Halley, in coastal Antarctica, from January 2004 through to February 2005. The campaign measurements covered an extremely wide range of species allowing investigations to be carried out within the broad context of boundary layer chemistry. Here we present an overview of the CHABLIS campaign. We provide details of the measurement location and introduce the Clean Air Sector Laboratory (CASLab) where the majority of the instruments were housed. We describe the meteorological conditions experienced during the campaign and present supporting chemical data, both of which provide a context within which to view the campaign results. Finally we provide a brief sumCorrespondence to: A. E. Jones (a.jones@bas.ac.uk) mary of highlights from the measurement campaign. Unexpectedly high halogen concentrations profoundly affect the chemistry of many species at Halley throughout the sunlit months, with a secondary role played by emissions from the snowpack. This overarching role for halogens in coastal Antarctic boundary layer chemistry was completely unanticipated, and the results have led to a step-change in our thinking and understanding.

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Section: Meteorological Conditions During Chablissupporting

confidence: 70%

Chemistry of the Antarctic Boundary Layer and the Interface with Snow: an overview of the CHABLIS campaign

et al. 2008

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“…noaa.gov/pub/archives/gdas1) were used as input, and the model was run every hour in backward mode for 5 days at 0, 200, and 500 m above the model ground level. Three typical situations prevail at DDU: strong katabatic winds flowing out from the Antarctic ice sheet situated south of the station, pure marine air masses, or continental/marine mixed air masses with easterly winds due to the arrival near the site of lowpressure systems (König-Langlo et al, 1998). Oceanic origin was attributed to air masses having traveled at least 1 day over the ocean and less than 3 days out of 5 over the highaltitude Antarctic plateau.…”

Section: Ancillary Parametersmentioning

confidence: 99%

“…A detailed description of the sampling site ("Labo 3") has been given by Preunkert et al (2013) while the climatology of this coastal station has been detailed by König-Langlo et al (1998). The average surface air temperature ranges from −1 • C in January to −17 • C in winter, with a mean annual temperature of −12 • C. The annual mean surface wind speed is 10 m s −1 , with no clear seasonal variations.…”

Section: Sampling Site and Prevailing Meteorological Conditionsmentioning

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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“…If the midwinter low-ozone values are genuine, why are they not observed in early winter at Neumayer during the many years of observation of surface ozone in the 1990s (WDCGG, 2003), the more so as Neumayer is only 700 km NE of Halley on the same Weddell Sea coast, and the relative wind roses are almost identical (Konig-Langlo et al, 1998)? Perhaps this is because the area of frequent open water in winter near Neumayer is only about 1/10 that near Halley (Arrigo and van Dijken, 2003) -there is less potential for frost-flower formation close to Neumayer in winter.…”

Section: Apparent Loss Of Surface Ozone In Midwintermentioning

confidence: 99%

Polar tropospheric ozone depletion events observed in the International Geophysical Year of 1958

Roscoe

Roscoe²

2006

Atmos. Chem. Phys.

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Abstract. The Royal Society expedition to Antarctica established a base at Halley Bay, in support of the International Geophysical Year of 1957–1958. Surface ozone was measured during 1958 only, using a prototype Brewer-Mast sonde. The envelope of maximum ozone was an annual cycle from 10 ppbv in January to 22 ppbv in August. These values are 35% less at the start of the year and 15% less at the end than modern values from Neumayer, also a coastal site. This may reflect a general increase in surface ozone since 1958 and differences in summer at the less windy site of Halley, or it may reflect ozone loss on the inlet together with long-term conditioning. There were short periods in September when ozone values decreased rapidly to near-zero, and some in August when ozone values were rapidly halved. Such ozone-loss episodes, catalysed by bromine compounds, became well-known in the Artic in the 1980s, and were observed more recently in the Antarctic. In 1958, very small ozone values were recorded for a week in midwinter during clear weather with light winds. The absence of similar midwinter reductions at Neumayer, or at Halley in the few measurements during 1987, means we must remain suspicious of these small values, but we can find no obvious reason to discount them. The dark reaction of ozone and seawater ice observed in the laboratory may be fast enough to explain them if the salinity and surface area of the ice is sufficiently amplified by frost flowers.

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Climatology of the three coastal Antarctic stations Dumont d'Urville, Neumayer, and Halley

Cited by 152 publications

References 15 publications

Chemistry of the Antarctic Boundary Layer and the Interface with Snow: an overview of the CHABLIS campaign

Chemistry of the Antarctic Boundary Layer and the Interface with Snow: an overview of the CHABLIS campaign

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

Polar tropospheric ozone depletion events observed in the International Geophysical Year of 1958

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