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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…
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)…
Oceanographic measurements were conducted along WOCE Southern Ocean meridional section SR3 between Tasmania and Antarctica, and along the part of WOCE Southern Ocean zonal section S4 lying between approximately 110 and 162 degrees E, from December 1994 to February 1995.
The geographic distribution, stocks and vertical profiles of phytoplankton of the seasonal ice zone off … east Antarctica were determined during the 2005–2006 austral summer during the Baseline Research … on Oceanography, Krill and the Environment-West (BROKE-West) survey.
We report the first observations of E region neutral wind fields and their interaction … with auroral arcs at mesoscale spatial resolution during geomagnetically quiet conditions at … Mawson, Antarctica. This was achieved by using a scanning Doppler imager…
Systematic recording of the cosmic radiation commenced in Hobart in 1946 and at Mawson in Antarctica in 1955, making these two … of the longest running cosmic ray observatories in the world. For the IGY, observations were also made at a sub-Antarctic island and … near the equator…
1. Incidental mortality in fisheries is causing declines in many albatross populations around the world. To assess potential interactions with regional fisheries satellite tags were used to track black-browed albatrosses (Thalassarche melanophrys) and light-mantled sooty albatrosses…
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…
Special emphasis should be placed on determining optimal sampling regimes to detect … statistically significant differences in key indicators between populations for species with high conservation … values, especially when invasive handling techniques are the only method of gathering … data.
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.
The Amery Ice Shelf, East Antarctica, undergoes high basal melt rates near the southern … limit of its grounding line where 80% of the ice melts within 240km of becoming afloat. A considerable … portion of this later refreezes downstream as marine ice.
It is known that planetary waves play important role in the polar … stratospheric vortex breakdown and ozone value increasing in late … Antarctic spring. In this work…
Arctic and Antarctic tropopause is formed under extreme climate … conditions, both in troposphere and stratosphere. In the troposphere, distribution of orography, ice sheet and stationary atmospheric centres of … action is distinct.
Analysis of the quasi-stationary planetary wave (QSW) influence on total … ozone column (TOC) distribution over 60°N and 60°S latitudes is … presented. TOMS version 8 total ozone data for years 1979-2003 were … used to compare the vortex-edge TOC distribution in both hemispheres.
Euphausiids are vital components of many oceanic foodwebs. Due to their large size, they are key prey … species for many vertebrates, and several species are subject to commercial fisheries. The best studied … euphausiid species is Antarctic krill (Euphausia superba)…
Seabird surveys in January – March 2006 of a poorly known area of the Southern Ocean … adjacent to the East Antarctic coast identified six seabird communities, several of which were … comparable to seabird communities identified both in adjacent sectors of the Antarctic…
A climatology of hydroxyl (6-2) band temperatures has been derived from 15 consecutive years of scanning … spectrometer measurements at Davis station (68°S, 78°E), Antarctica.
Physiological measurements of both stress and … sex hormones are often used to estimate the consequences … of natural or human-induced change in ecological studies of … various animals. DiVerent methods of hormone measurement … exist…
Aim We examined the genetic structure among populations and regions for the … springtails Cryptopygus antarcticus antarcticus and Gomphiocephalus hodgsoni … (Collembola) to identify potential historical refugia and subsequent colonization … routes…