Sulphur and oxygen isotope signatures of dissolved sulphate in freshwater from King George Island, Antarctic Peninsula

2021 ◽  
pp. 1-3
Author(s):  
Yeongmin Kim ◽  
Insung Lee ◽  
Bernhard Mayer ◽  
Guebuem Kim ◽  
Jong Ik Lee ◽  
...  
Keyword(s):  
Oxygen Isotope ◽  
Antarctic Peninsula ◽  
Ice Cores ◽  
Ion Concentration ◽  
King George Island ◽  
Antarctic Region ◽  
Isotopic Signatures ◽  
Natural Processes ◽  
Sulphur Cycling ◽  
The Antarctic

The sulphate ion (SO42-) is one of major species in freshwater as well as seawater, originating from various natural and anthropogenic processes (Krouse & Mayer 2000). Compared to the Northern Hemisphere, where human activities affect the sulphate concentration and isotopic signatures, the contribution of anthropogenic sulphate is likely to be negligible in freshwater and ice cores in the Antarctic region (Patris et al. 2002). This means that the sulphur and oxygen isotope compositions of the dissolved sulphate could hint at information on the sources, formation and deposition due to various natural processes and sulphur cycling in the Antarctic region, especially for the dissolved sulphate in surface waters such as ponds and creeks (Patris et al. 2000, Kim et al. 2017). Here we report the ion concentration and sulphur and oxygen isotope compositions of the dissolved sulphate in freshwater from King George Island in the Antarctic Peninsula, which provide implications regarding the sources of the dissolved sulphate and the sulphur cycling in the Antarctic region.

scholarly journals Oxygen-Isotope and Total Beta-Radioactivity Measurements on 10 m Ice Cores from the Antarctic Peninsula

1982 ◽  
Vol 28 (98) ◽  
pp. 43-55 ◽  
Author(s):  
D. A. Peel ◽  
H. B. Clausen
Keyword(s):  
Oxygen Isotope ◽  
Antarctic Peninsula ◽  
Isotope Ratio ◽  
Accumulation Rate ◽  
Ice Cores ◽  
Radioactivity Analysis ◽  
The Mean ◽  
The Antarctic ◽  
The Relationship ◽  
Climatic Information

AbstractAs part of the Glaciology of the Antarctic Peninsula (GAP) programme, the snow cover at 25 stations was sampled to 10 m depth for oxygen–isotope and total β-radioactivity analysis. The mean annual oxygen–isotope ratio correlates satisfactorily with 10 m temperature despite the complex topography of the area and suggests on average that climatic trends in the region are fairly systematic. The relationship with temperature is similar to that derived from a simple model in which an air mass initially of maritime subtropical characteristics is progressively cooled as it moves towards the region. The detailed isotope profiles show that for future deep drilling the most easily interpretable climatic information will be found in the more continental areas—on the cast coast and on the plateau in the south of the region. The degree of continentality of particular sites is reflected in the amplitude of the annual wave in the upper portion of the isotope ratio profile as well as in the accumulation rate.

scholarly journals Oxygen-Isotope and Total Beta-Radioactivity Measurements on 10 m Ice Cores from the Antarctic Peninsula

1982 ◽  
Vol 28 (98) ◽  
pp. 43-55 ◽  
Author(s):  
D. A. Peel ◽  
H. B. Clausen
Keyword(s):  
Oxygen Isotope ◽  
Antarctic Peninsula ◽  
Isotope Ratio ◽  
Accumulation Rate ◽  
Ice Cores ◽  
Radioactivity Analysis ◽  
The Mean ◽  
The Antarctic ◽  
The Relationship ◽  
Climatic Information

Abstract As part of the Glaciology of the Antarctic Peninsula (GAP) programme, the snow cover at 25 stations was sampled to 10 m depth for oxygen–isotope and total β-radioactivity analysis. The mean annual oxygen–isotope ratio correlates satisfactorily with 10 m temperature despite the complex topography of the area and suggests on average that climatic trends in the region are fairly systematic. The relationship with temperature is similar to that derived from a simple model in which an air mass initially of maritime subtropical characteristics is progressively cooled as it moves towards the region. The detailed isotope profiles show that for future deep drilling the most easily interpretable climatic information will be found in the more continental areas—on the cast coast and on the plateau in the south of the region. The degree of continentality of particular sites is reflected in the amplitude of the annual wave in the upper portion of the isotope ratio profile as well as in the accumulation rate.

scholarly journals Climate since AD 1510 on Dyer Plateau, Antarctic Peninsula: evidence for recent climate change

1994 ◽  
Vol 20 ◽  
pp. 420-426 ◽  
Author(s):  
L. G. Thompson ◽  
D. A. Peel ◽  
E. Mosley-thompson ◽  
R. Mulvaney ◽  
J. Dal ◽  
...  
Keyword(s):  
19Th Century ◽  
Antarctic Peninsula ◽  
Chemical Species ◽  
Ice Cores ◽  
Warming Trend ◽  
Snow Accumulation ◽  
Annual Variations ◽  
Recent Climate ◽  
The 19Th Century ◽  
The Antarctic

A 480 year record of the oxygen-isotope ratios, dust content, chemical species and net accumulation from ice cores drilled in 1989 90 on Dyer Plateau in the Antarctic Peninsula is presented. The continuous analyses of small (sub-annual) samples reveal well-preserved annual variations in both sulfate content and δ18O, thus allowing an excellent time-scale to be established.This history reveals a recent pronounced warming in which the last two decades have been among the warmest in the last five centuries. Furthermore, unlike in East Antarctica, on Dyer Plateau conditions appear to have been fairly normal from AD 1500 to 1850 with cooler conditions from 1850 to 1930 and a warming trend dominating since 1930. Reconstructed annual layer thicknesses suggest an increase in net accumulation beginning early in the 19th century and continuing to the present. This intuitive conflict between increasing net accumulation and depleted δ18O (cooler climate) in the 19th century appears widespread in the peninsula region and challenges our understanding of the physical relationships among moisture sources, air temperatures and snow accumulation. The complex meteorological regime in the Antarctic Peninsula region complicates meaningful interpretation of proxy indicators and results in a strong imprint of local high-frequency processes upon the larger-scale climate picture.

scholarly journals Climate since AD 1510 on Dyer Plateau, Antarctic Peninsula: evidence for recent climate change

1994 ◽  
Vol 20 ◽  
pp. 420-426 ◽  
Author(s):  
L. G. Thompson ◽  
D. A. Peel ◽  
E. Mosley-thompson ◽  
R. Mulvaney ◽  
J. Dal ◽  
...  
Keyword(s):  
19Th Century ◽  
Antarctic Peninsula ◽  
Chemical Species ◽  
Ice Cores ◽  
Warming Trend ◽  
Snow Accumulation ◽  
Annual Variations ◽  
Recent Climate ◽  
The 19Th Century ◽  
The Antarctic

A 480 year record of the oxygen-isotope ratios, dust content, chemical species and net accumulation from ice cores drilled in 1989 90 on Dyer Plateau in the Antarctic Peninsula is presented. The continuous analyses of small (sub-annual) samples reveal well-preserved annual variations in both sulfate content and δ18O, thus allowing an excellent time-scale to be established.This history reveals a recent pronounced warming in which the last two decades have been among the warmest in the last five centuries. Furthermore, unlike in East Antarctica, on Dyer Plateau conditions appear to have been fairly normal from AD 1500 to 1850 with cooler conditions from 1850 to 1930 and a warming trend dominating since 1930. Reconstructed annual layer thicknesses suggest an increase in net accumulation beginning early in the 19th century and continuing to the present. This intuitive conflict between increasing net accumulation and depleted δ18O (cooler climate) in the 19th century appears widespread in the peninsula region and challenges our understanding of the physical relationships among moisture sources, air temperatures and snow accumulation. The complex meteorological regime in the Antarctic Peninsula region complicates meaningful interpretation of proxy indicators and results in a strong imprint of local high-frequency processes upon the larger-scale climate picture.

Newcastle disease virus in penguins from King George Island on the Antarctic region

2010 ◽  
Vol 146 (1-2) ◽  
pp. 155-160 ◽  
Author(s):  
Luciano M. Thomazelli ◽  
Jansen Araujo ◽  
Danielle B. Oliveira ◽  
Luiz Sanfilippo ◽  
Carolina S. Ferreira ◽  
...  
Keyword(s):  
Newcastle Disease Virus ◽  
Disease Virus ◽  
Newcastle Disease ◽  
King George Island ◽  
Antarctic Region ◽  
The Antarctic

A new species and new records of Lecanora (Lecanoraceae, lichenized Ascomycota) with usnic acid from the Antarctic region

Phytotaxa ◽  
2016 ◽  
Vol 261 (2) ◽  
pp. 185 ◽  
Author(s):  
IRIS NADIA DE LA ROSA ◽  
ALFREDO PASSO ◽  
JUAN MANUEL RODRÍGUEZ ◽  
JORGE OSCAR CHIAPELLA ◽  
MARÍA INÉS MESSUTI
Keyword(s):  
New Species ◽  
Secondary Metabolite ◽  
Antarctic Peninsula ◽  
New Records ◽  
Usnic Acid ◽  
Distribution Range ◽  
Antarctic Region ◽  
The Antarctic ◽  
First Time ◽  
A New Species

A new species of Lecanora, L. flavocrassa, is described from the Antarctic region. Additionally, L. stenotropa is registered for the first time from Antarctica and the distribution range of L. intricata is extended to the Antarctic Peninsula. A key to the species of Lecanora from Antarctica that contain usnic acid as secondary metabolite is presented.

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