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We report the first observations of E-region neutral wind fields and their … interaction with auroral arcs at meso-scale spatial resolution during … geomagnetically quiet conditions at Mawson, Antarctica. This was achieved by … using a scanning Doppler imager…
The mid- to high-latitudes of the Southern Hemisphere are dominated by the westerly winds. These are important because changes in their strength determine precipitation and temperature regimes. However, little is known about their past strength, or spatial and temporal variability.
The sub-Antarctic region between 45-60°S is primarily ocean. However, there are a few small isolated islands, most of which are currently facing the combined pressures of climate change and introduced species.
The sub-Antarctic region between 45-60 °S is primarily ocean. However, there are a few small isolated islands, most of which are currently facing the combined pressures of climate change and introduced species.
Our aim was to estimate the population of emperor penguins (Aptenodytes fosteri) using a single synoptic survey. We examined the whole continental coastline of Antarctica using a combination of medium resolution and Very High Resolution (VHR)…
Sea ice plays an important role in ocean–atmosphere heat exchange, global albedo and the marine ecosystem. Knowledge of variation in sea-ice extent is essential in order to understand past climates, and to model possible future climate scenarios.
During simultaneous high-altitude balloon flights from College, Alaska, and Macquarie Island, Australia, on March 5, 1962, substantial fluxes of auroral zone X rays were observed in both hemispheres during magnetic bay activity.
The Southern Hemisphere (SH) is relatively data sparse in terms of ozone monitoring, particularly in the mid-latitudes where there are few long term records. The Australian Bureau of Meteorology possesses continuous datasets from the Australian region dating back to the 1950s (Dobson) or 1960s…
Interdecadal water mass changes in the Indian -Western … Pacific sectors of the Southern Ocean were investigated … using the Japanese Antarctic Research Expeditions and … historical hydrographic observations from the 1950s to … 1990s.
A comparison is made of results for barotropic, surface and abyssal flows during the formation and … passage of a warm-core ring in the East Australian Current. The barotropic velocities are estimated from … sea-floor measurements of the horizontal electric field, which is induced by water motion.
Climatological monthly upper-ocean temperature anomalies from the annual mean in the subtropical southwest … Pacific Ocean show a characteristic out-of-phase relationship between the mixed layer and the underlying water.
In the Indian Ocean subtropical gyre, historical temperature, salinity, and oxygen data with a median date of … 1962 are compared with a hydrographic section taken at a mean latitude of 328S in October–November 1987.
Abstract: Two sediment cores collected from beneath the Amery Ice Shelf, East Antarctica describe the … physical sedimentation patterns beneath an existing major embayed ice shelf. Core AM01b was collected … from a site of basal freezing, contrasting with core AM02…
Ultraviolet radiation (UV) is a minor fraction of the solar spectrum reaching the ground surface. In this assessment we summarize the results of previous work on the effects of the UV-B component (280-315 nm) on terrestrial ecosystems…
The global climate is intimately connected to changes in the polar oceans. The variability of … sea ice coverage affects deep-water formations and large-scale thermohaline circulation patterns. The … polar radiative budget is sensitive to sea-ice loss and consequent surface albedo changes.
Ozone in the troposphere has four important roles. Tropospheric ozone is a greenhouse gas…
A baseline for persistent organohalogen compound (POC) accumulation in the Antarctic … keystone species, Antarctic krill (Euphausia superba) has been established for a 50¡ã longitudinal … range of the eastern Antarctic sector. Samples of adult krill…