10921 to 10932 of 13961 results
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Read more of: Cenozoic strike-slip faulting from the eastern margin of the Wilkes Subglacial Basin to the western margin of the Ross Sea rift: an aeromagnetic connection
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Large-scale geomagnetic effects of May 4, 1998
Read more of: Large-scale geomagnetic effects of May 4, 1998We study large-scale magnetospheric disturbances elicited by the May4, 1998 high speed stream by modeling the Dst and studying records from 4 meridional magnetometer chains covering key local time sectors. […]
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Power to the magnetosphere: May 4, 1998
Read more of: Power to the magnetosphere: May 4, 1998An extraordinary powering of the magnetosphere by the solar wind occurred in a 3-hour burst early on May 4 when the IMF was very intense and pointed south (≈-35 nT; […]
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Supraglacial debris along the front of the Larsen-A Ice Shelf, Antarctic Peninsula
Read more of: Supraglacial debris along the front of the Larsen-A Ice Shelf, Antarctic PeninsulaSemi-continuous, linear accumulations of poorly-sorted debris are present on the surface of the remnant Larsen-A Ice Shelf, Antarctic Peninsula. These accumulations form a complex of debris bands extending parallel to […]
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Rapid, large-scale temperature changes in the polar mesosphere and their relationship to meridional flows
Read more of: Rapid, large-scale temperature changes in the polar mesosphere and their relationship to meridional flowsMesospheric temperatures derived from spectroscopic measurements of the hydroxyl (OH) nightglow have been observed from Rothera (67.6°S, 68.1°W) and Halley (75.6°S, 26.6°W) stations in Antarctica during the 2002 austral winter […]
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Astrobiological instrumentation for Mars – the only way is down
Read more of: Astrobiological instrumentation for Mars – the only way is downIn this paper, in this edition of the Journal commemorating the life and work of David Wynn-Williams, we consider approaches to the astrobiological investigation of Mars. We provide a brief […]
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Why Raman spectroscopy on Mars? – a case of the right tool for the right job
Read more of: Why Raman spectroscopy on Mars? – a case of the right tool for the right jobWe provide a scientific rationale for the astrobiological investigation of Mars. We suggest that, given practical constraints, the most promising locations for the search for former life on Mars are […]
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The human exploration of the Martian poles Part 2 – support technologies
Read more of: The human exploration of the Martian poles Part 2 – support technologiesIn Part 1 of this paper, we presented a phased approach to the development of a Mars pole human-inhabited research station modelled on those in the terrestrial polar regions. To […]
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Fourier-transform Raman spectroscopic studies of chronological change in stromatolitic cores from Antarctic lake sediments
Read more of: Fourier-transform Raman spectroscopic studies of chronological change in stromatolitic cores from Antarctic lake sedimentsThe Fourier transform-Raman spectra of two lacustrine sediment cores from Antarctic sites are reported. The Lake Hoare specimens were predominantly calcium carbonate, quartz and β-carotene, with chlorophyll and calcium sulphate […]
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Non-destructive analysis of pigments and other organic compounds in lichens using Fourier-transform Raman spectroscopy: a study of Antarctic epilithic lichens
Read more of: Non-destructive analysis of pigments and other organic compounds in lichens using Fourier-transform Raman spectroscopy: a study of Antarctic epilithic lichensLichens in Antarctic habitats are subjected to environmental extremes, including UVB radiation, desiccation and low temperatures, as well as to rapid fluctuations in these. Lichens synthesise a variety of chemical […]
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Laser wavelength selection for Raman spectroscopy of microbial pigments in situ in Antarctic desert ecosystem analogues of former habitats on Mars
Read more of: Laser wavelength selection for Raman spectroscopy of microbial pigments in situ in Antarctic desert ecosystem analogues of former habitats on MarsThe vital ultraviolet- (UV-) protective and photosynthetic pigments of cyanobacteria and lichens (microbial symbioses) that dominate primary production in Antarctic desert ecosystems auto-fluoresce at short wavelengths. We therefore use a […]