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Adding carbon dioxide (CO2) to the ocean alters the carbonate chemistry and lowers pH, making surface waters more acidic and decreasing the carbonate ions available to calcifiers for calcite and aragonite production.
Zooplankton and benthic invertebrates are important components of polar lakes and often form the highest trophic level in the aquatic food web. Their biodiversity decreases towards high latitudes…
Paratrochammina minutissima n. sp. is described from … Abraxas and Ace Lakes in the Vestfold Hills, East … Antarctica. The species is characterized by very small size … (120 mm diameter), 4K chambers in the final whorl…
Evidence is provided from a sediment core from saline Abraxas Lake, Vestfold Hills, that indicates that the lake existed through the Last Glacial Maximum. It can therefore be concluded that at least part of the Vestfold Hills also remained ice-free through the Last Glacial Maximum…
Bacterial community structures in soils collected … from eight sites around Casey Station, Antarctica, were … investigated using denaturing gradient gel electrophoresis … (DGGE) of ampliWed 16S rRNA gene fragments.
Responses by marine top predators to environmental variability … have previously been almost impossible to observe directly. By … using animal-mounted instruments simultaneously recording … movements, diving behavior, and in situ oceanographic properties…
Over the past few years, co-located radar and lidar measurements have been made of ice aerosol layers in the summer mesospause region (80-95 km height) above Australia's Davis station in Antarctica.
Laboratory experiments suggest that decreased ocean carbonate-ion concentrations due to anthropogenic CO2 will result in reduced calcification rates in marine calcareous organisms.
This review of late-Holocene palaeoclimatology represents the results from a PAGES/CLIVAR … Intersection Panel meeting that took place in June 2006. The review is in three parts: the principal high-resolution … proxy disciplines (trees, corals, ice cores and documentary evidence)…
We used a Rayleigh lidar located at Davis station, East Antarctica, to compare Polar … Mesospheric Cloud (PMC) and stratospheric gravity wave (GW) strengths in the … austral summer 2005–2006.
[1] Using Rayleigh lidar and Mesosphere-Stratosphere- … Troposphere radar at Davis Antarctica (68.6S) during the … 2005–2006 austral summer, we obtained the first Southern … Hemisphere common-volume measurements of Polar … Mesospheric Clouds (PMC) and Polar Mesosphere … Summer Echoes (PMSE).
The global distribution, sources, and propagation of atmospheric waves in the … equatorial upper troposphere and lower stratosphere were investigated using an … atmospheric general circulation model with T106L60 resolution (120-km horizontal … and 550-m vertical resolution).
A 100 cm long sediment sequence was recovered from Beaver Lake in Amery Oasis, East … Antarctica, using gravity and piston corers.
Summary … • Studies of ultraviolet (UV) light-induced DNA damage in three Antarctic moss … species have shown Ceratodon purpureus to be the most UV tolerant, despite … containing lower concentrations of methanol-soluble UV-screening compounds … than the co-occurring Bryum pseudotriquetrum.
Greenslade, Penelope and Potapov, M. 2008. A new genus and species … of Isotominae (Collembola: Isotomidae) from cushion plants on … sub-Antarctic Macquarie Island. Kanunnah 2: 87–97. ISSN 1832-536X. A new genus of a blind, white isotomid, Azoritoma n. gen. and new species … A. macquariensis…
The effects of ambient solar UV radiation (280 to 400 nm) were determined using 3 natural … marine protist communities incubated in 650 l tanks (minicosms) for 13 to 14 d over the summer … of 2002¨C2003 at Davis Station, Antarctica.
The role played by Southern Hemisphere sea-ice in global climate is explored using an … Earth system climate model of intermediate complexity.
A high-resolution, offline ocean general circulation model, incorporating a realistic parameterization of … mixed layer convection, is used to diagnose pathways and time scales of Southern Hemisphere intermediate, mode, and lower thermocline water ventilation.
The coupled ocean–atmosphere–ice response to variations in the Southern Annular Mode (SAM) is … examined in the National Center for Atmospheric Research (NCAR) Community Coupled Climate Model … (version 2).