7789 to 7800 of 13961 results
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Read more of: Mesozoic-Cenozoic volcanism on Livingston Island, South Shetland Islands, Antarctica: geochemical evidence for multiple magma generation processes
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The high latitude convection response to an interval of substorm activity
Read more of: The high latitude convection response to an interval of substorm activityOn 17 March 1991, five clear substorm onsets/intensifications took place within a three hour interval. During this interval ground-based data from the EISCAT incoherent scatter radar, a digital CCD all […]
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Doppler shift pulsations on whistler mode signals from a VLF transmitter
Read more of: Doppler shift pulsations on whistler mode signals from a VLF transmitterWhistler mode signals from the NAA transmitter (24 kHz) received at Faraday, Antarctica are processed to obtain the Doppler shift at a much higher time resolution than has previously been […]
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Antarctic microbial diversity: the basis of polar ecosystem processes
Read more of: Antarctic microbial diversity: the basis of polar ecosystem processesMicroorganisms are fundamental to the functioning of Antarctic ecosystems. Although microbial biomass can be immense in Southern Ocean blooms and freshwater cyanobacterial mats, species richness is generally more restricted than […]
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Response of pioneer soil microalgal colonists to environmental change in Antarctica
Read more of: Response of pioneer soil microalgal colonists to environmental change in AntarcticaThere is increasing evidence of climate change in Antarctica, especially elevated temperature and ultraviolet B (UVB) flux within the ozone “hole.” Its origins are debatable, but the effects on ice […]
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The relationship between water content and cold tolerance in the arctic collembolan Onychiurus arcticus (Collembola: Onychiuridae)
Read more of: The relationship between water content and cold tolerance in the arctic collembolan Onychiurus arcticus (Collembola: Onychiuridae)The arctic collembolan Onychiurus arcticus is freezing intolerant and experiences temperatures below -25°C during winter periods of low air temperatures and only light snow cover. Summer-collected individuals have a mean […]
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The record of aerosol deposited species in ice cores, and problems of interpretation
Read more of: The record of aerosol deposited species in ice cores, and problems of interpretationIce cores have now become established as one of the primary archives of paleoclimatic information, covering timescales from seasonal up to 100,000 years or more. In the polar ice sheets, […]
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Location, movement and reactions of impurities in solid ice
Read more of: Location, movement and reactions of impurities in solid iceThe aim of drilling ice cores is to obtain paleoatmospheric information of wide significance. However, the concentrations of chemicals found in the- ice are determined both by the atmospheric concentrations, […]
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Seasonal variation in vitamin D metabolites in southern elephant seal (Mirounga leonina) females at south Georgia
Read more of: Seasonal variation in vitamin D metabolites in southern elephant seal (Mirounga leonina) females at south GeorgiaSouthern elephant seals spend two periods on land each year, during breeding and moult, exposed to intensive UV radiation. The time between periods on land are spent at sea, with […]
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Sulphur sources for epithermal and mesothermal veins in Cretaceous-Tertiary magmatic-arc rocks, Livingston Island, South Shetland Islands
Read more of: Sulphur sources for epithermal and mesothermal veins in Cretaceous-Tertiary magmatic-arc rocks, Livingston Island, South Shetland IslandsEpithermal veins in early Triassic turbidites on Hurd Peninsula are isotopically homogeneous over an area of 13 km × 2 km (mean δ34S = +2.2‰, 1σ= 1.7, n = 65) […]
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The Moores Peak Formation, a Cretaceous debris-avalanche deposit in the Antarctic Peninsula Volcanic Group, Livingston Island, South Shetland Islands
Read more of: The Moores Peak Formation, a Cretaceous debris-avalanche deposit in the Antarctic Peninsula Volcanic Group, Livingston Island, South Shetland IslandsThe Moores Peak Formation occurs on eastern Hurd Peninsula, Livingston Island, part of the South Shetland Island volcanic arc, which was active during Mesozoic and Cenozoic times. The rocks were […]