6901 to 6912 of 13961 results
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Read more of: Transient (approx. = 10 s) VLF amplitude and phase perturbations due to lightning-induced electron precipitation into the ionosphere (the ‘Trimpi effect’)
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Preliminary lithofacies assessment and 40Ar/39Ar ages of Cenozoic volcanic sequences in eastern Marie Byrd Land
Read more of: Preliminary lithofacies assessment and 40Ar/39Ar ages of Cenozoic volcanic sequences in eastern Marie Byrd LandBecause of its remoteness, Marie Byrd Land is among the most inaccessible and least visited parts of Antarctica. However, it contains a very poorly studied, large Cenozoic alkaline volcanic province […]
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Late Miocene valley-confined subglacial volcanism in northern Alexander Island, Antarctic Peninsula
Read more of: Late Miocene valley-confined subglacial volcanism in northern Alexander Island, Antarctic PeninsulaIsolated, Late Miocene volcanogenic sequences in northern Alexander Island, Antarctic Peninsula, form an unusual, cogenetic association of volcaniclastic, sandy-gravelly lithofacies (including tillites) and volcanic (lava/hyalocalstite) lithofacies. Using simple lithofacies analysis […]
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Magnetospheric electron temperatures inferred from whistler dispersion measurements
Read more of: Magnetospheric electron temperatures inferred from whistler dispersion measurementsElectron temperatures in the vicinity of the magnetospheric equator were estimated from dispersion measurements on 24 whistlers observed and digitally recorded at Halley, Antarctica (76 deg S, 27 deg W; […]
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New significance for Antarctic biological collections and taxonomic research
Read more of: New significance for Antarctic biological collections and taxonomic researchCollections of preserved terrestrial and freshwater plants and animals, made since the earliest expeditions to the Antarctic and sub-Antarctic, have been the basis of our understanding of the biological composition […]
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Imaging riometer and HF radar measurements of drifting F region electron density structures in the polar cap
Read more of: Imaging riometer and HF radar measurements of drifting F region electron density structures in the polar capA study of riometer, photometer, and ionosonde data from South Pole Station has revealed a class of unusual dayside absorption events which occur near local magnetic noon when South Pole […]
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The equilibrium constant of NO2 with N2O4 and the temperature dependence of the visible spectrum of NO2: A critical review and the implications for measurements of NO2 in the polar stratosphere
Read more of: The equilibrium constant of NO2 with N2O4 and the temperature dependence of the visible spectrum of NO2: A critical review and the implications for measurements of NO2 in the polar stratosphereMeasurements of stratospheric NO2 by ground-based visible spectrometers rely on laboratory measurements of absorption cross-sections. We review low-temperature laboratory measurements, which disagree by amounts claimed to be significant. Our recalculation […]