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Stratosphere-to-troposphere transport (STT) provides an important … natural source of ozone to the upper troposphere, but the characteristics of … STT events in the Southern Hemisphere extratropics and their contribution to … the regional tropospheric ozone budget remain poorly constrained. Here…
Future changes in the boreal polar vortex under a climate change scenario are still a matter of debate in the scientific community. For example, there is a lack of consensus among models about possible future changes in the frequency of major stratospheric warmings.
The oxygen and deuterium isotopic composition of ice represent a prodigal source of information for the reconstruction of past climate.
1.Ecosystem change is predicted to become more prevalent with climate change. Widespread dieback of cushion plants and bryophytes in alpine fellfield on Macquarie Island may represent such change. Loss of the keystone endemic cushion plant, Azorella macquariensis…
Poa annua is the most widespread alien species in the sub-Antarctic, occurring on all major island groups and is invasive and spreading on the Antarctic Peninsula. P. annua colonises areas disturbed by human activity, seal wallows, penguin rookeries and glacial moraines.
Poa annua L. is the most widespread weed in the sub-Antarctic, present on all major island groups and on the Antarctic Peninsula. Its ability to withstand heavy grazing has enabled it to spread significantly on islands with introduced herbivores.
Floral development of two alien species (Cerastium fontanum, Poa annua) were monitored through the summer of 2013/14 at three different altitudinal sites (coastal, hillside and plateau) on the North eastern end of sub-Antarctica Macquarie Island.
Despite the widespread use and transport of fuels in Antarctica, there is very limited data available on the behaviour and weathering of these fuels in the Antarctic marine environment. The potential impacts of a fuel spill on marine biota are largely unknown.
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…
Poa annua is a non-native grass found in Antarctica and the sub-Antarctic. It has a restricted distribution on Heard Island but is common and widespread on Macquarie Island, both World Heritage Areas.
The sub-Antarctic islands are some of the least inhabited and most protected ecosystems in the world. Due to their isolation and low human visitation they have escaped the worst effects of alien plant invasion.
The sub-Antarctic islands are some of … the least inhabited and most protected … ecosystems in the world. Due to their … isolation and low human visitation they … have escaped the worst effects of alien … plant invasion.
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…
For many species trophic interactions are difficult to study because of their cryptic habits and/or the unfavourable characteristics of samples for traditional diet techniques. DNA-based diet techniques are sensitive…
A marked bend in the Hawaiian-Emperor seamount chain supposedly resulted from a recent major … reorganization of the plate-mantle system there 50 million years ago. Although alternative mantledriven … and plate-shifting hypotheses have been proposed…
The long-standing mainstay of support for C. T. R. Wilson’s global circuit hypothesis is the similarity … between the diurnal variation of thunderstorm days in universal time and the Carnegie curve of electrical … potential gradient.
Molecular markers and morphological characters can help infer the colonization history of organisms. A combination of mitochondrial (mt) D-loop DNA sequences, nuclear DNA data, external measurements … and skull characteristics shows that house mice (Mus musculus)…
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…