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Geisz et al. report an unexpected consequence of climate … change, implicating glacier meltwater as a source for DDT … in coastal Antarctic seas (1). Hypothetically, glaciers may … act as secondary sources for DDT and there may be a link … to climate change. However, their data are sparse, variable…
The total ozone column (TOC) in the 'collar' region outside the Antarctic Ozone Hole exhibits a pronounced wave-1 zonal pattern in austral spring. During the period 1979-2005, the zonal minimum of the pattern exhibited a general eastward shift of approximately 45 degrees of longitude…
During the summer of 2008/09, measurements were taken at 34 magnetotelluric (MT) stations along profiles totaling approximately 180 line km in the Prydz Bay region of Antarctica. Prydz Bay comprises several regions of coastal outcrops with distinct geological histories…
Measuring the parameters of the atmospheric circuit with hourly and daily time resolution … is difficult to achieve and demonstrate. However, a relationship between Vi, the ionosphere- … to-ground potential difference, and Ez, the near-ground-level vertical electric field…
The Network for the Detection of Mesopause Change (NDMC) is a global program with the mission … to promote international cooperation among research groups investigating the mesopause … region (80-100 km) with the goal of early identification of changing climate signals.
Aerogeophysical data obtained by the ICECAP project yield new insights into the basal … topography and evidence of new subglacial lakes within the Aurora Subglacial Basin, East … Antarctica. The new bed elevation map allows us to consider the flow paths of subglacial water.
Comparison of ice core records from Law Dome, East Antarctica and meteorological records shows … that periods of strengthened atmospheric zonal wave three (ZW3) circulation drive enhanced … meridional transport of moisture and tend to produce higher snowfall at Law Dome.
The diet of Antarctic krill (Euphausia superba) has … been studied using a variety of techniques, but … current methods still suffer from problems that are … difficult to solve. This study examined an alternative … approach utilizing DNA as a prey biomarker.
During the transition from the last glacial maximum to the present warm interglacial a sequence of large, hemispheric, climate changes took place: the Bølling‐Allerød and Younger … Dryas in the north and the Antarctic Cold Reversal in the south.
We compare thermal tropopause climatology in Arctic and Antarctic by NCEP–NCAR Reanalysis-1 data over the 1979–2008 period. The role of the troposphere and stratosphere in tropopause anomaly distribution is examined using corresponding temperature and geopotential height field.
Zonal asymmetry in quasi-stationary ozone distribution is considered in the latitude range 50-80S using satellite total ozone data. Amplitude of the quasi-stationary wave has been determined as a half-difference between maximal and minimal values in 3-month averaged ozone distribution. Besides…
We evaluate atmospheric ionization during the Ground Level Enhancement (GLE) of 2005 Jan 20 using the continuous slowing down (CSD) energy loss approximation [1,2]. The top-of-atmosphere particle flux is derived using satellite measurements (for particle energies below 500MeV)…
Background: Sooty (Puffinus griseus) and short-tailed (P. tenuirostris) shearwaters are abundant seabirds that range widely across global oceans. Understanding the foraging ecology of these species in the Southern Ocean is important for … monitoring and ecosystem conservation and management.
Flexibility in foraging behaviour and diet are characteristics of many penguin species. While these 2 aspects of foraging ecology are presumably tightly coupled, the connection between … them is rarely examined directly.
The 33.2 MHz interferometric meteor radars located at Davis Station, Antarctica and Darwin, Australia typically detect around 15 000 specular underdense meteor echoes every day.
Circumpolar Deep Water (CDW) is the most extensive water mass in the Australian Circumpolar Current (ACC). Upper CDW (UCDW) is studied here over the period 1958-2005 using Simple Ocean Data Assimilation (SODA) reanalysis data.
We evaluate atmospheric ionization during the Ground Level Enhancement (GLE) of 2005 Jan 20 using two methods: a Monte-Carlo (MC) air-shower simulation [1] and a continuous slowing down (CSD) energy loss approximation [2,3]. For both methods…
Fidelity and projected changes in the climate models, used for the Intergovernmental Panel on Climate … Change (IPCC) Fourth Assessment Report (AR4), are assessed with regard to the Southern Hemisphere … extratropical ocean and sea ice systems.
It is a glaring fact that climate, and in particular global warming and associated climate change, is having a major impact on life on Earth, and will continue to do so into the forseeable future 1, 2.
Green sulfur bacteria (GSB) (Chlorobiaceae) are primary producers that are important in global … carbon and sulfur cycling in natural environments. An almost complete genome sequence for a … single, dominant GSB species (‘C-Ace’)…
We analyze the precursor of a Forbush decrease (FD) observed with the Global Muon Detector Network on 2006 … December 14. An intense geomagnetic storm is also recorded during this FD with the peak Kp index of 8+.
The upwelling of iron-rich Upper Circumpolar Deep Water (UCDW) is thought to be critical for primary production in the Southern Ocean, since iron has been shown to be a limiting factor in what is otherwise a high nutrient region.
Reconstructing and modeling extent and dynamics of ice sheets is crucial in … understanding and predicting the evolution of ice sheets. Key to ice sheet dynamics are ice … streams, which drain most of the ice from the ice sheet interior to the ice shelves, where most of … the ice is lost.