Eight glacial cycles from an Antarctic ice core
The Antarctic Vostok ice core provided compelling evidence of the nature of climate, and of climate feedbacks, over the past 420,000 years. Marine records suggest that the amplitude of climate […]
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Read more of: Eight glacial cycles from an Antarctic ice core
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Latitudinal and seasonal variations of quasiperiodic and periodic VLF emissions in the outer magnetosphere
Read more of: Latitudinal and seasonal variations of quasiperiodic and periodic VLF emissions in the outer magnetosphereWe have analyzed ELF-VLF receiver and search coil magnetometer data from five Antarctic stations from 1998 and 1999 to study quasiperiodic emissions (QPs) and periodic emissions (PEs), which occur as […]
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The role of Raman spectroscopy as an astrobiological tool in the exploration of Mars
Read more of: The role of Raman spectroscopy as an astrobiological tool in the exploration of MarsWe describe how the exploration of the Martian environment would be considerably enhanced through the use of Raman spectroscopy. Furthermore, Raman spectroscopy is particularly suited for both mineralogical analysis of […]
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Biological modification of haematite in Antarctic cryptoendolithic communities
Read more of: Biological modification of haematite in Antarctic cryptoendolithic communitiesDetailed FT-Raman spectra of Antarctic cryptoendolithic colonies in Beacon sandstone have revealed some novel information about the biogeological modification process involving iron(III) mobilization by the organism. The previously unreported but […]
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Stratified response to environmental stress in a polar lichen characterized with FT-Raman microscopic analysis
Read more of: Stratified response to environmental stress in a polar lichen characterized with FT-Raman microscopic analysisThe role of Antarctic epilithic lichens in the primary colonization of rocks and in the formation of soils is receiving attention because of the production of the stress-protective biochemicals needed […]
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Raman spectroscopy of senescing snow algae: pigmentation changes in an Antarctic cold desert extremophile
Read more of: Raman spectroscopy of senescing snow algae: pigmentation changes in an Antarctic cold desert extremophileThe FT-Raman spectra are described of green and red snow algae, Chlamydomona, involved in the colonization of exposed surfaces of the McLeod Glacier, Jane Col, Signy Island, situated at the […]
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Protective pigmentation in UVB-screened Antarctic lichens studied by Fourier transform Raman spectroscopy: an extremophile bioresponse to radiation stress
Read more of: Protective pigmentation in UVB-screened Antarctic lichens studied by Fourier transform Raman spectroscopy: an extremophile bioresponse to radiation stressFT-Raman spectra were obtained for two Antarctic extremophiles, the epilithic lichens Xanthoria elegans and Caloplaca sublobulata from the maritime ecological long-term research site on Leonie Island. Twelve specimens from cloches […]
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Life of the Bellingshausen plate
Read more of: Life of the Bellingshausen plateThe onset of independent Bellingshausen plate movement in the South Pacific is estimated at just after chron C33o. This event closely follows a change in the offset sense on the […]
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High-resolution animated tectonic reconstruction of the South Pacific and West Antarctic margin
Read more of: High-resolution animated tectonic reconstruction of the South Pacific and West Antarctic marginAn animated reconstruction shows South Pacific plate kinematics between 90 and 45 Ma, using the satellite-derived gravity anomaly field, interpolated isochrons and plate rotation parameters from both published and new […]
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The large-scale dynamics of the mesosphere-lower thermosphere during the Southern Hemisphere stratospheric warming of 2002
Read more of: The large-scale dynamics of the mesosphere-lower thermosphere during the Southern Hemisphere stratospheric warming of 2002An unprecedented major stratospheric warming occurred in the Antarctic winter of 2002. We present measurements of winds in the mesosphere-lower thermosphere (MLT) made with MF radars located at Davis (69degreesS, […]
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Thickness and extent of the subglacial till layer beneath an Antarctic paleo-ice stream
Read more of: Thickness and extent of the subglacial till layer beneath an Antarctic paleo-ice streamFast-flowing ice streams and outlet glaciers currently account for as much as 90% of the discharge from the Antarctic and Greenland Ice Sheets. Although the deformation of subglacial material has […]