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PILOT (Pathfnder for an International Large Optical Tele- … scope) is a proposed 2 m class optical/infrared telescope to be sited … at Dome C on the Antarctic plateau. Recent site testing results from … Dome C have shown remarkable ground level seeing, a large isoplanatic … angle…
We present wind and temperature profiles at Dome C measured … by balloon born sonds during the polar summer. Data from 197 … flights have been processed for 4 campaigns between 2000 and 2004. We show the exceptionnal wind conditions at Dome C, Average ground … wind speed is 3.6 m/s.
Southern Ocean waters are highly productive and contain important food resources for … many indigenous predators, including humans. Management of these resources has fallen under … the regulation of the Convention for the Conservation of Antarctic Marine Living Resources … (CCAMLR)…
Growth conditions in Antarctica are extreme, and the few plants that can … grow there are exposed to a highly seasonal, rapidly variable and often … extreme climate. In recent decades, these plants have also been exposed to … increased levels of UV-B radiation (UV-BR)…
An image of the dayside low-energy ion outflow event … that occurred on ] 6 December 2003 was constructed with … ground- and space-basedG PS (Global Positioning System) Total Electron Content (TEC) data and ion drift metcr data … from the DMSP (Defense Meteorological Satellite Program)…
Electromagnetic ion cyclotron (EMIC) waves are generated in the equatorial … region of the plasmasphere-magnetospherbey internal wave-particle interaction … with ring current ions. In ground observations they are observed as Pc 1-2 (0.1-5 … Hz) waves…
A review is presented of passive coherent and incoherent radar observations of … ultra-low-frequency (ULF) waves. Passive radars primarily observe the ionospheric … signatures of the shear Alfven field line resonance (FLR). Recent results … include:
Fresnel transform meteor speed estimation is … investigated. A spectral based technique is developed allowing the transform to be applied at low temporal sampling rates. Simulations are used to compare meteoroid … speeds determined using the Fresnel transform and alternative techniques…
Concentrations of UV-B absorbing pigments and anthocyanins were measured in three moss species, over a summer growing season in Antarctica. Pigment concentrations were compared with a range of climatic variables to determine if there was evidence that pigments were induced by UV-B radiation…
The recent discovery of exceptional seeing conditions at Dome C, Antarctica, raises the possibility … of constructing an optical observatory there with unique capabilities. However, little is known from an astronomer’s … perspective about the optical sky brightness and extinction at Antarctic sites.
Many contaminated cold region soils are deficient in nitrogen, and addition of the proper amount of this nutrient can increase the biodegradation rate. However…
We use line transect detection functions together with generalized linear and additive … models to estimate detection probability when detection on the line ("g(O)") may … not be certain.
This paper presents the meteor temperatures estimated using two radars installed … in Davis (69 deg S, 78 deg E), Antarctica. The Davis MST radar was installed in … February 2003, primarily for observation of polar mesosphere summer echoes…
This paper presents the meteor observations using two radars installed in Davis (69 … deg S, 78 deg E), Antarctica. The Davis MST radar was installed in February 2003, primarily for observation of polar mesosphere summer echoes…
Concentrations of UV-B absorbing pigments and anthocyanins were measured in three moss species, over a summer growing season in Antarctica. Significant seasonal differences were found in the potential UV-B screening pigments. The most exposed species, Ceratodon purpureus…
Antarctica is both the coldest and most arid continent on Earth, and experiences continuous … light in midsummer and continuous darkness in midwinter. These factors reduce the growth … rate of the continental Antarctic flora (mosses, lichens and algae) to a minimum.
Antarctica has been exposed to increases in ultraviolet-B (UV-B) radiation as a result of … ozone depletion for several decades. In addition, climate change will alter temperature and … water availability to plant communities over the next century. Recent studies…
The impact of ambient ultraviolet (UV)-B radiation on the endemic bryophyte, Grimmia … antarctici, was studied over 14 months in East Antarctica. Over recent decades, Antarctic … plants have been exposed to the largest relative increase in UV-B exposure as a result of … ozone depletion.
Antarctic bryophyte communities presently tolerate physiological extremes in water availability, surviving both desiccation and submergence events.
Climate change is expected to affect the high latitudes first and most severely, rendering … Antarctica one of the most significant baseline environments for the study of global … climate change. The indirect effects of climate warming…
Concentrations of UVB (ultraviolet B) absorbing pigments and anthocyanins were … measured in three moss species, over a summer growing season in Antarctica.
We describe the use of structured graphs for the visual exploration of biodiversity data. A graph consists of a set of nodes, representing entities of interest, linked by edges showing relationships between those entities. For biodiversity data, the nodes are typically chosen to represent taxa…
Analysis of modern surface sediments from fjords in the Vestfold Hills (Antarctica) indicates that 58% of the variation in benthic diatom assemblages can be attributed to changes in environmental parameters with water depth.
The process of marking otherwise indistinguishable animals … as individuals (and following them through subsequent … phases of their lives) has been central to numerous advances … in animal ecology, management, and conservation (Caughley … and Gunn 1996). Indeed…