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Atmospheric gravity waves (AGWs), which are generated in the lower atmosphere, transport significant amount of energy and momentum into the mesosphere and lower thermosphere. Among many parameters to characterize AGWs, horizontal phase velocity is very important to discuss the vertical propagation.
Atmospheric gravity waves (AGWs), which are generated in the lower atmosphere, transport significant amount of energy andmomentum into the mesosphere and lower thermosphere and cause the mean wind accelerations in the mesosphere.
Atmospheric gravity waves (AGWs), which are generated in the lower atmosphere, transport significant amount of energyand momentum into the mesosphere and lower thermosphere and cause the mean wind accelerations in the mesosphere.
Measurements … of … a … number … of … atmospheric … components … will … be … undertaken … over … 1 … year-old … sea … ice … off … East … Antarctica … as … part … of … the … Sea … Ice … Physics … EXperiment … (SIPEX … II) during … September … and … October … 2012.
We review the 2012 Antarctic ozone hole, making use of various meteorological … reanalyses, remotely sensed ozone measurements and ground-based measurements … of ultra-violet radiation. Based on analysis of 33 years of satellite records…
This presentation introduces a recently awarded Australian Antarctic Science (AAS) project as part of the research theme 1 'Climate Processes and Change'. This project utilises the technique of Global Positioning System (GPS) Radio Occultation (RO)…
Stressors associated with climate change, and contaminants resulting from the activities of humans, are affecting organisms and ecosystems worldwide. Until recently, the impacts of these stressors on marine ecosystems have largely been examined in isolation.
Stressors associated with climate change, and contaminants resulting from the activities of humans, are affecting organisms and ecosystems worldwide. Until recently, the impacts of these stressors on marine ecosystems have largely been examined in isolation. However, with predicted climate change…
Stressors associated with global climate change and local human activities are affecting marine organisms worldwide. Stressors include changes in temperature, salinity and acidification, in addition to contaminants including metals and hydrocarbons.
We describe a new breeding behaviour discovered in emperor penguins; utilizing satellite and aerial-survey observations four emperor penguin breeding colonies have been recorded as existing on ice-shelves. Emperors have previously been considered as a sea-ice obligate species…
While definitive winter measurements for Dome C must await until 2004, on the basis of existing data the Antarctic … Dome sites promise the best conditions on the Earth for many astronomical observations. Because atmospheric … turbulence is largely confined to a ~ 100 m ground layer…
The Southern Ocean islands are some of the most isolated landmasses in the world. Few of the islands support permanent human settlements or land based industries and as such they remain as some of the most uninvaded landscapes globally.
The upper troposphere and lower stratosphere (UTLS) is a highly coupled region of the atmosphere where radiation, dynamics, clouds and chemical processes interact on a wide variety of spatial and temporal scales. We use a suite of instruments at Davis, Antarctica (69S, 78E)…
The 2013 ozone hole was relatively small, with about 15-17 ozone holes out of the last 20 (1994-2013) having been bigger/deeper (depending on the metric used), and only 2-4 having been smaller (2002, 2004, 2010, 2012).
Links between changes in the southern polar stratosphere and tropospheric climate have been identified in both modelling and observational studies, highlighting the importance of an accurate stratosphere in climate models. However…
CryoSat-2 was launched in April 2010, as part of the European Space agency's (ESA) Earth Opportunity Programmes.
The 2012 ozone hole was one of the smallest since the late 1980fs due to a warmer than normal mid]lower … stratosphere over the Antarctic region this year. The development and recovery of the 2012 ozone hole will … be shown via a set of metrics based on the Ozone Monitoring Instrument (OMI)…
We … use … a … set … of … metrics … for … the … polar … atmosphere … to … characterize … and … assess … the … performance … of … the … ACCESS-1.0, ACCESS-1.3 … and … CSIRO-Mk3.6 … coupled … ocean-atmosphere … general … circulation … models … over … the … recent … historical … period.
La Trobe University has recently installed a new all-sky imaging Fabry-Perot spectrometer at Mawson Station, Antarctica. It is capable of recording independent spectra from many tens of locations across the sky simultaneously…
All-sky imaging Fabry-Perot spectrometers can provide two dimensional maps of thermospheric wind and temperature fields over a circular region spanning around 1400 km in diameter at F-region heights, or about half this in the E-region.
Large-etalon Fabry-Perot Spectrometers (FPS) measure upper atmosphere winds and temperatures by observing spectral profiles of atmospheric emission lines with sufficient resolution to determine the Doppler broadening, from which temperature is deduced…