Publications matching your search query
Results 151 to 175 of 224
Abstract. The discovery of an abundance of microorganisms that flourish in a diverse range of environments, from the frigid waters of the Antarctic, to the superheated waters of the hydrothermal vents, at the bottom of 11-km … deep ocean trenches and in salt-saturated lakes…
In Australia more than 300 vertebrates, including 43 insectivorous bat species, depend on hollows in … habitat trees for shelter, with many species using a network of multiple trees as roosts. We used roost-switching … data on white-striped freetail bats (Tadarida australis; Microchiroptera:
Ice-core records are a key resource for reconstructing Antarctic climate. However, a … number of physical processes preclude the simple interpretation of ice-core properties such as oxygen … isotopic ratios in terms of climate variables like temperature or sea-level pressure. We show that welldated…
We report on the first Southern Hemisphere comparison between polar mesosphere summer echoes (PMSE) and cosmic noise absorption (CNA). Observations were obtained during the austral summer of 2003–2004 from a 55 MHz MST radar, a 38.
[1] We report on novel spectral characteristics of E-region … backscatter acquired using a 1.94 MHz Medium Frequency … (MF) radar above the high-latitude Antarctic station Davis … (68.6ºS). Two distinctive Doppler spectra are observed: one … that exhibits bifurcation in Doppler velocity…
Bubbles of air trapped in ice sheets provide an important record of past atmospheric gas composition. Understanding of climate change and atmospheric composition over the last 400,000 years has been greatly improved using ice core analysis.
Pc3-4 pulsations observed at high-latitudes have been examined for evidence of magnetic field line resonances. Previous studies have suggested that these pulsations are due to harmonics of the lower frequency Pc5 pulsations.
Seasonal and interannual variations of the mixed layer properties in the Antarctic Zone (AZ) south of Tasmania are … described using7 WOCE/SR3 CTD sections and 8 years of summertime SURVOSTRAL XBT and thermosalinograph … measurements between Tasmania and Antarctica. The AZ…
Repeat hydrographic sections across the Antarctic Circumpolar Current (ACC) in Drake Passage are used to derive an empirical relationship between upper ocean … temperature and the baroclinic transport stream function.
Eddy-like distributions of chlorophyll a were clearly … detected in the Antarctic Divergence zone around 140E … by SeaWiFS ocean color images. The distribution was also … supported by in-situ measurements.
Graphical methods for the exploration of ecological databases … Ben Raymond, Lee Belbin, Jonathan Stark … Scientific data repositories are becoming increasingly characterised by large data sets stored in web-accessible, structured databases.
To properly characterize the atmospheric properties of a site for a future large telescope or interferometer, it is insufficient to … measure quantities, such as the full-width at half-maximum of a stellar image, that have been integrated over the entire … atmosphere.
The primary limitation to ground based astronomy is the Earth's atmosphere. The atmosphere above the … Antarctic plateau is fundamentally dierent in many regards compared to the atmosphere at temperate sites. The … extreme altitude…
We evaluate the effect that radome transparency has on atmospheric … opacity measurements performed by the skydip technique. We show that, except at rather high opacities, it is not sufficient to ignore losses in the … radome (or “window”)…
We use satellite imagery from four sensors (Multi-angle Imaging SpectroRadiometer (MISR), Enhanced Thematic Mapper (ETM), and RADARSAT and ERS Synthetic Aperture Radar (SAR) to monitor the lengths of two rifts on the Amery Ice Shelf, from 1996 to 2004.
A biological/oceanographic survey was conducted around the Antarctic Divergence (AD) off Adelie Land, Antarctica by the RTV Umitaka-Maru III of Tokyo University of Fisheries in the 1995/1996 Austral summer. Investigations were included (1) characteristics of oceanic structure, (2)…