Results 21 to 30 of about 2,118,018 (212)

A Cross-Sectional Model for West Antarctica [PDF]

Annals of Glaciology, 1984
The dynamic state of the West Antarctic ice sheet has been termed the grand problem of glaciology. An attempt is presented to assess it by simulating the observed ice thickness and ice velocities along a cross-section from ice stream B (Ross Sea) to Pine Island Glacier (Pine Island Bay) with a numerical model developed from the one described by Budd ...
B. J. McInnes, W. F. Budd
openaire   +1 more source

Gravity analyses for the crustal structure and subglacial geology of West Antarctica, particularly beneath Thwaites Glacier [PDF]

, 2008
textThe West Antarctic Ice Sheet (WAIS) is mostly grounded in broad, deep basins (down to 2.5 km below sea level) that are stretched between five crustal blocks. The geometry of the bedrock, being mostly below sea level, induces a fundamental instability
Diehl, Theresa Marie, 1981-
core   +1 more source

The projected risk of plant invasions on the peri‐Antarctic islands under climate change

Ecography, EarlyView.
The peri‐Antarctic islands have largely been shielded from alien plant species due to low human pressure, limited introduction pathways, and local harsh climates. However, climate change is expected to lower these barriers. We assess the vulnerability of 12 peri‐Antarctic islands to invasion by 2220 plant species invasive in at least one region of the ...
Tom Vorstenbosch, Franz Essl, Bernd Lenzner, Johannes Wessely, Wayne Dawson, Mark van Kleunen, Jan Pergl, Petr Pyšek, Stefan Dullinger   +8 more
wiley   +1 more source

Responses of Antarctic seabird populations to past climate change

Ecography, EarlyView.
Higher‐order predators such as Antarctic seabirds serve as ecological indicators of environmental change and provide a crucial trophic link between marine and terrestrial ecosystems. Despite their prevalence and significance in the Antarctic ecosystem, there is a lack of understanding of the impacts of major regime shifts in paleoclimate on flighted ...
Elize Y. X. Ng, Louise Emmerson, Barbara Wienecke, Fabiola León Miranda, Colin Southwell, Juliana A. Vianna, Christopher P. Burridge   +6 more
wiley   +1 more source

A Reassessment of Petrochemistry of ~1.2 Ga Tonalitic Rocks of the Northern Tugela Terrane, Natal Metamorphic Belt, South Africa: Further Constraints on the Evolution of This Belt

Geological Journal, EarlyView.
Our petrochemical studies on ~1.2 Ga granitoids of the Natal Metamorphic Belt, South Africa, do not suggest any property similar to Phanerozoic‐style subduction‐related granitoids. Plot of Kotongweni Tonalite in Y versus Sr diagram (after Moyen 2011), note that most samples have Sr/Y < 50.
Palesa Leuta, Saumitra Misra, Thembiso O. Basupi   +2 more
wiley   +1 more source

Spatiotemporal Changes and Climate Driving Factors of Compound Precipitation‐Temperature Extreme Events Across Global Land Areas

International Journal of Climatology, EarlyView.
During the period 1901–2024, the dominant proportion of compound dry‐warm extremes in annual, June–July–August (JJA), and December–January–February (DJF) occurrences was the highest among the four types of compound precipitation and temperature extremes across global land areas, accounting for 40.1%, 50.3%, and 28.0%, respectively.
Ruting Yang, Silong Zhang, Xiongpeng Tang, Chao Gao, Haibin Zhang, Xin Yin, Yanli Liu   +6 more
wiley   +1 more source

Lead Sources to the Amundsen Sea, West Antarctica

Environmental Science & Technology, 2016
The global prevalence of industrial lead (Pb) contamination was exemplified decades ago by the predominance of anthropogenic Pb in samples of Antarctic surface ice and in Southern Ocean surface waters. Decreases in environmental Pb contamination corresponding with the near-global phase-out of leaded automobile gasoline beginning in the 1970s have since
Ndungu, Kuria, Zurbrick, Cheryl M, Stammerjohn, Sharon, Severmann, Silke, Sherrell, Robert M, Flegal, A. Russel   +5 more
openaire   +3 more sources

Holocene vegetation dynamics of Grande Terre (Kerguelen Islands) inferred from sedimentary ancient DNA

Journal of Quaternary Science, EarlyView.
ABSTRACT While the Antarctic region has experienced significant climatic changes over the Holocene, few high‐resolution records have examined their effects on the local biota. In order to understand past ecological shifts and forecast future changes, it is important to obtain high‐resolution palaeoecological records from this region.
Xaali O'Reilly‐Berkeley, Aloïs Revéret, Youri Lammers, Maaike Zwier, Anne E. Bjune, Fabien Arnaud, Jostein Bakke, Sandra Nogué, Inger G. Alsos   +8 more
wiley   +1 more source

Inland thinning of the Amundsen Sea sector, West Antarctica [PDF]

, 2002
[1] Together with the Pine Island glacier (PIG), the Thwaites (TG) and Smith (SG) glaciers are the principal drainage systems of the Amundsen Sea (AS) sector of Western Antarctica.
Wingham, DJ, Shepherd, A, Mansley, JAD
core  

New geochronological constraints on Late Pleistocene glaciation in the southern Cadí Massif, SE Pyrenees

Journal of Quaternary Science, EarlyView.
ABSTRACT The Cadí Massif (42°17′09″ N, 1°38′11″ E; 2649 m a.s.l.) in the southeastern Pyrenees preserves clear evidence of Late Pleistocene glaciation, although previous research has focused almost exclusively on its northern slope. By contrast, the southern slope has remained largely unexplored.
M. Oliva, J. Ventura, A. Çiner, M. A. Sarıkaya, J. Bonsoms, K. M. Wilcken   +5 more
wiley   +1 more source