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Anti-parallel reconnection at the dayside magnetopause: ionospheric signatures and implications for the low latitude boundary layer
1 January, 2003 by Gareth Chisham, Mervyn Freeman, Michael Pinnock
Reconnection at the dayside magnetopause is of fundamental importance in determining the dynamics and composition of the magnetosphere and the high latitude ionosphere. There are two competing hypotheses for such…The use and application of GPR in sandy fluvial environments: methodological considerations
1 January, 2003
Ground penetrating radar (GPR) is a popular technique for imaging and interpreting sedimentary architecture. However, current literature shows a wide range in the quality of information provided on the GPR…Antarctic glacial history and sea-level change
1 January, 2002
The Pacific margin of the Antarctic Peninsula was drilled during Ocean Drilling Program (ODP) Leg 178 to understand the past 10 m.y. of its glacial history and to test a…Data report: Oxygen and carbon isotope measurements on Neogloboquadrina pachyderma (s) from holes 0196B and 1101A, Antarctic Peninsula margin, Leg 178
1 January, 2002
Oxygen and carbon isotopic ratios were measured on left-coiling Neogloboquadrina pachyderma separated from sediments recovered from Holes 1096B (3152 m water depth) and 1101A (3280 m water depth) during Ocean…Data report: Composite depths and spliced sections for Leg 178 Sites 1095 and 1096, Antarctic Peninsula continental rise
1 January, 2002
During Leg 178, multiple advanced piston corer holes were drilled at our sites (1095, 1096, 1098, and 1099). Cores from the holes were correlated on board to produce composite depths…Modelling multivariate determinants of growth in Antarctic bryozoans
1 January, 2002 by David Barnes
Bryozoans seem fairly typical amongst Antarctic benthos, in both timing and magnitude of growth. Growth varies interspecifically from nearly comparable to much slower than warm water equivalent species. Factors including…Read more on Modelling multivariate determinants of growth in Antarctic bryozoans
Silicic volcanism: an undervalued component of large igneous provinces and volcanic rifted margins
1 January, 2002 by Philip Leat, Teal Riley
Silicic volcanic rocks are associated with most, if not all, continental flood basalt provinces and volcanic rifted margins, where they can form substantial parts of the eruptive stratigraphy and have…Cretaceous patterns of floristic change in the Antarctic Peninsula
1 January, 2002 by Alistair Crame
Cretaceous radiation of angiosperms from low to high palaeolatitudes, coupled with the break-up of Gondwana, played a major role in establishing and maintaining biogeographic patterns across the southern hemisphere. Uncertainties…Read more on Cretaceous patterns of floristic change in the Antarctic Peninsula
The ultraviolet radiation environment of Earth and Mars: past and present
1 January, 2002
Exactly 130 years passed between the discovery by Isaac Newton that white light was composed of colors [1] and the discovery of ultraviolet radiation by Johann Wilhelm Ritter, a German…Read more on The ultraviolet radiation environment of Earth and Mars: past and present
Cenozoic palaeogeography and the rise of modern biodiversity patterns
1 January, 2002 by Alistair Crame
The steepest latitudinal and longitudinal gradients in taxonomic diversity at the present day are those associated with tropical high diversity foci. Although there has been a tendency in the past…Read more on Cenozoic palaeogeography and the rise of modern biodiversity patterns
Contourite sedimentation in the Falkland Trough, western South Atlantic
1 January, 2002
The Falkland Trough is a west-east bathymetric deep that separates the Falkland Plateau from the North Scotia Ridge in the western South Atlantic. It lies in the path of Circumpolar…Read more on Contourite sedimentation in the Falkland Trough, western South Atlantic
The contribution of wave-particle interactions to electron loss and acceleration in the Earth’s radiation belts during geomagnetic storms
1 January, 2002 by Richard Horne
The Earth’s radiation belts are a hazardous environment that pose a risk to astronauts and spacecraft on orbit. Having been discovered in 1958, there is renewed interest on the part…Data report: Strontium isotope dating of barnacle fragments: Antarctic Peninsula Site 1103
1 January, 2002
Strontium isotope ratios from multiple plates of two barnacle fragments from Site 1103 (Ocean Drilling Program Leg 178) provide maximum age estimates for the oldest glacial sedimentary package drilled. Three…The shelled Magellanic Mollusca: with special reference to biogeographic relations in the Southern Ocean
1 January, 2002 by Katrin Linse
[Please note that the PDF file available is is a copy of the original PhD thesis, submitted to the University of Hamburg in 2000. It contains the same content as…A medium-depth ice core drill
1 January, 2002 by Andrew Tait, Robert Mulvaney, Steven Bremner
Taking as a model the Alfred Wegener Institute medium depth ice core drill, we have developed a drill capable of retrieving ice cores to depths of around 150-200m. At a…Palaeobiogeography and the Ordovician and Mesozoic-Cenozoic biotic radiations
1 January, 2002 by Alistair Crame
Curves of taxonomic diversity through geological time consistently show major evolutionary radiations during the Ordovician Period and from the mid-Mesozoic to the present day. Both intervals were characterized by marked…Read more on Palaeobiogeography and the Ordovician and Mesozoic-Cenozoic biotic radiations
Data report: Grain-size data, Sites 1095, 1096, and 1101, Antarctic Peninsula continental rise
1 January, 2002
Sites 1095, 1096, and 1101 were drilled on the continental rise west of the Antarctic Peninsula (Fig. F1) to recover a continuous high-resolution record of Antarctic glaciation. Site 1095 is…Neogene record of Antarctic Peninsula glaciation in continental rise sediments: ODP Leg 178, Site 1095
1 January, 2002
Site 1095 is the most distal of three continental rise sites drilled during Ocean Drilling Program Leg 178. A long (600 m), near-continuous section extends from the Holocene down to…The Weddell Sea: contourites and hemipelagites at the northern margin of the Weddell Gyre
1 January, 2002
Fine-grained contourites and hemipelagites occur in the northern Weddell Sea, deposited from the Weddell Gyre. Where bottom currents are intensified over the slope, sandy and silty contourites have been deposited…Data report: Dinoflagellate cyst analysis of Neogene sediments from Sites 1095 and 1096, Antarctic Peninsula continental rise
1 January, 2002
Protoperidiniacean dinoflagellate cysts were identified in 19 of 28 samples from two sites on the Antarctic Peninsula continental rise. Cysts are most common in the lower Pliocene and upper Miocene…Mixed biosiliceous-terrigenous sedimentation under the Antarctic Circumpolar Current, Scotia Sea
1 January, 2002
Sediment supply to the Scotia Sea is controlled by the east-flowing Antarctic Circumpolar Current (ACC) with some Weddell Gyre influence in the south. Near-bottom flow is unsteady with frequent changes…Processes on sediment drifts from 3.5 kHz data, Antarctic Peninsula continental rise
1 January, 2002
On the continental rise west of the Antarctic Peninsula, large sediment drifts preserve a hihg-resolution record of Neogene glaciation, We present a new map of acoustic facies on the continental…Read more on Processes on sediment drifts from 3.5 kHz data, Antarctic Peninsula continental rise
Sediment drifts and deep-sea channel systems, Antarctic Peninsula Pacific Margin
1 January, 2002
Twelve sedimentary mounds are identified on the upper continental rise of the Pacific Margin of the Antarctic Peninsula. All these mounds are produced by a varying degree of interaction of…Read more on Sediment drifts and deep-sea channel systems, Antarctic Peninsula Pacific Margin
The 1969 subglacial eruption on Deception Island (Antarctica): events and processes during an eruption beneath a thin glacier and implications for volcanic hazards
1 January, 2002
A short-lived eruption of basaltic andesite to andesite on Deception Island in 1969 occurred from a series of fissures underneath a glacier. The glacier was thin (c. 100 m) and…Bottom curents, contourites and deep-sea sediment drifts: current state-of-the-art
1 January, 2002
This paper provides both an introduction to and summary for the Atlas of Contourite Systems that has been compiled as part of the International Geological Correlation Project - IGCP 432.…Read more on Bottom curents, contourites and deep-sea sediment drifts: current state-of-the-art
Data report: Diffuse spectral reflectance data from rise sites 1095, 1096, and 1101 and Palmer Deep sites 1098 and 1099 (Leg 178, western Antarctic Peninsula)
1 January, 2002
The routine use of spectrophotometry on the sediment surfaces of archive halves of each section during the onboard sedimentological core description process is a great stride toward development of real-time…Data report: Bulk sediment parameters (CaCO3, TOC, and more than 63 mu m) of Sites 1095, 1096, and 1011, and coarse-fraction analysis of Site 1095 (ODP Leg 178, western Antarctic Peninsula)
1 January, 2002 by Claus-Dieter Hillenbrand
The area west of the Antarctic Peninsula is a key region for studying and understanding the history of glaciation in the southern high latitudes during the Neogene with respect to…Observations of surge periodicity in East Greenland using molybdenum records from marine sediment cores
1 January, 2002
This paper describes a unique record of glacier flow instability for East Greenland during the Little Ice Age. Trace metal analysis of sediment cores collected during 1998 from the Noret…Sediment reworking on high-latitude continental margins and its implications for palaeoceanographic studies: insights from the Norwegian-Greenland Sea
1 January, 2002
Geological evidence indicates that sediment reworking is common around the continental margins and abyssal depths of the Norwegian-Greenland Sea, a high-latitude setting with glacier-influenced margins. Detailed analysis of 22 cores…Off the hook? Initiatives to reduce seabird bycatch in longline fisheries
1 January, 2001
The recent history of global initiatives to reduce seabird bycatch in longline fisheries is reviewed, highlighting in turn the activities of environmental and industry non-governmental organizations (NGOs), national governments, and…Read more on Off the hook? Initiatives to reduce seabird bycatch in longline fisheries
Rutford Ice Stream, Antarctica
1 January, 2001 by Adrian Jenkins, Andy Smith, David Vaughan, Hugh Corr, Keith Makinson, Keith Nicholls
Rutford Ice Stream is in many ways a typical Antarctic outlet glacier. Constrained by a subglacial-bed trough to the east of the Ellsworth Mountains, it drains an area of 49,000…Antarctic-Arctic contrasts – key pointers to mesospheric dynamics and energetics
1 January, 2001
In the mesosphere and lower thermosphere the contrasts between the Antarctic and Arctic regarding both the energy inputs and the consequent dynamics, energetics and chemistry mean that comparative polar observations…Read more on Antarctic-Arctic contrasts – key pointers to mesospheric dynamics and energetics