Red sprites, upward lightning, and VLF perturbations
In the last decade there has been a great deal of interest in the detection and understanding of phenomena occurring above active thunderstorms. The discovery of the optical phenomena now […]
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Read more of: Red sprites, upward lightning, and VLF perturbations
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Riometer and HF radar signatures of polar patches
Read more of: Riometer and HF radar signatures of polar patchesPolar patch was the name given originally to a spatially limited enhancement of the 630-nm emission observed in the dark polar cap. More recently, the term has been applied to […]
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Microbial dynamics in coastal waters of East Antarctica:plankton production and respiration
Read more of: Microbial dynamics in coastal waters of East Antarctica:plankton production and respirationThe rates of plankton community production and respiration were determined from in vitro changes in dissolved inorganic carbon and dissolved oxygen and the incorporation of (NaHCO3)-C-14 at a coastal site […]
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Experimental and theoretical fracture mechanics applied to Antarctic ice fracture and surface crevassing
Read more of: Experimental and theoretical fracture mechanics applied to Antarctic ice fracture and surface crevassingRecent disintegration of ice shelves on the Antarctic Peninsula has highlighted the need for a better understanding of ice shelf fracture processes generally. In this paper we present a fracture […]
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Large volume silicic volcanism along the proto-Pacific margin of Gondwana: lithological and stratigraphical investigations from the Antarctic Peninsula
Read more of: Large volume silicic volcanism along the proto-Pacific margin of Gondwana: lithological and stratigraphical investigations from the Antarctic PeninsulaJurassic magmatism in western Gondwana produced the most voluminous episode of continental volcanism in the Phanerozoic era. During the Early to Middle Jurassic, some 2.5–3 million km3 of dominantly basalt, […]
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Spatial structure of the 12-hour wave in the Antarctic as observed by radar
Read more of: Spatial structure of the 12-hour wave in the Antarctic as observed by radarWe present radar measurements of the 12-hour wave, a zonal wavenumber 1 westward propagating wave that exists in the southern polar mesopause region winds (Hernandez et al, 1993; Forbes et […]
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Krill population dynamics at South Georgia 1991-1997, based on data from predators and nets
Read more of: Krill population dynamics at South Georgia 1991-1997, based on data from predators and netsCentral to understanding krill population dynamics is knowledge of their population structure. To examine this we used length-frequency distributions from 142 wk of sampling (n = 23996 krill) of 3 […]
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Measurement of chick provisioning in Antarctic prions Pachyptila desolata using an automated weighing system
Read more of: Measurement of chick provisioning in Antarctic prions Pachyptila desolata using an automated weighing systemThe frequency and mass of meals delivered to ten Antarctic Prion Pachyptila desolata chicks nesting at Bird Island, South Georgia were examined using automated weighing systems, placed in the nest […]
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Predicting changes in the Antarctic krill, Euphausia superba, population at South Georgia
Read more of: Predicting changes in the Antarctic krill, Euphausia superba, population at South GeorgiaVariability in the Southern Ocean is frequently reflected in changes in the abundance of Antarctic krill Euphausia superba and subsequent effects on dependent predators. However, the nature and consequences of […]
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Temperature dependence of inorganic nitrogen uptake: reduced affinity for nitrate at suboptimal temperatures in both algae and bacteria
Read more of: Temperature dependence of inorganic nitrogen uptake: reduced affinity for nitrate at suboptimal temperatures in both algae and bacteriaNitrate utilization and ammonium utilization were studied by using three algal isolates, six bacterial isolates, and a range of temperatures in chemostat and batch cultures. We quantified affinities for both […]
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HF radar observations of the high-latitude ionospheric convection pattern in the morning sector for northward IMF and motion of the convection reversal boundary
Read more of: HF radar observations of the high-latitude ionospheric convection pattern in the morning sector for northward IMF and motion of the convection reversal boundaryObservations of plasma convection in the morning sector (0000 to 0600 magnetic local time (MLT)) during a period of northward IMF (Bz = +5 to +10 nT) on September 11, […]