Results 111 to 120 of about 119,043 (304)

Antarctic regional ice loss rates from GRACE

Earth and Planetary Science Letters, 2008
Abstract Using recent improved time-variable gravity solutions from the Gravity Recovery and Climate Experiment (GRACE), we estimate rates of Antarctic ice mass change for the period January 2003 through September 2006. Combined improvements in data and filtering techniques allow observation of ice loss in the northern Antarctic Peninsula (AP) and ...
Chen, J., Wilson, C., Tapley, B., Blankenship, D., Young, D.   +4 more
openaire   +3 more sources

Semi‐automated seal detection on the Western Antarctic Peninsula: an unsupervised machine learning approach for detecting ice seals in aerial survey data

Remote Sensing in Ecology and Conservation, EarlyView.
This study presents a semi‐automated, rule‐based image analysis pipeline to detect ice seals in aerial surveys of the Western Antarctic Peninsula during an unusually low sea ice year. By using simple hierarchical clustering instead of deep learning, the method substantially reduced human annotation effort while achieving 82% recall, identifying 758 ...
Claire McGinnity, Connor C.G. Bamford, Nathan Fenney, Andrew Fleming, Jaume Forcada, Michael S. Tift, Luis A. Hückstädt, Daniel P. Costa, Peter T. Fretwell   +8 more
wiley   +1 more source

Rhyming in the cold: first evidence of soniferous fishes in the Southern Ocean

Remote Sensing in Ecology and Conservation, EarlyView.
The acoustic ecology of Southern Ocean fishes remains unknown due to a lack of dedicated acoustic research on the fishes of this ocean. Passive acoustic monitoring data were collected at the South African sub‐Antarctic Prince Edward Islands using an underwater acoustic recorder, and towed underwater Ski‐Monkey cameras were deployed to identify fish ...
Fannie W. Shabangu, Grant van der Heever, Charles von der Meden, Hannah Truter, Stephen J. Lamberth, Ofer Gon   +5 more
wiley   +1 more source

Blue‐Prints for Ocean Governance: Analyzing Resource Sustainability in International Blue Economic Frameworks

Sustainable Development, EarlyView.
ABSTRACT Championed as a pathway for sustainable growth, the “blue economy” (BE) has garnered increasing interest in recent decades. International organizations like the World Bank and the Organization for Economic Cooperation and Development (OECD) increasingly point to marine resources and activities as a “new frontier” for economic growth ...
Flora St. Pier, Anar Ahmadov, Farid Guliyev   +2 more
wiley   +1 more source

Parent sources of Antarctic meteorites as inferred from pairing of the specimens [PDF]

Antarctic meteorites may be derived from regions different than those from which comtemporary falls derive. If so, they are useful in reconstruction of their parent bodies or masses.
Takeda, H.
core   +1 more source

Homo‐epitaxy and twinning produce complex nanostructures in cryogenic calcite

Journal of Applied Crystallography, EarlyView.
A transmission electron microscopy study of cryogenic calcite samples reveals the homo‐epitaxial intergrowths of {1120}//{1120}rotated, {0001}//{1100} and {1102}//{1108} interfaces, all being energetically favorable, along with their cooperation with {1014} twinning.Calcite is famous for the rich diversity of oriented crystal growths.
Péter Németh, Marco Bruno, Dino Aquilano, Zsombor Molnár   +3 more
wiley   +1 more source

The Antarctic Region: Geological Evolution and Processes [PDF]

Eos, Transactions American Geophysical Union, 1998
The Scientific Committee on Antarctic Research (SCAR) supports discipline‐ and issue‐based meetings in Antarctic research, and these are forums for announcing developments in Antarctic science. Refereed symposia proceedings normally follow and generate a number of volumes that almost constitute serial publication.
openaire   +1 more source

Body Size Regulates Niche Overlap Asymmetry in the Subtropical Andes Rain Shadow: Isotopic Paleoecology of Oligocene South American Ungulates

Integrative Zoology, EarlyView.
This study provides the first isotopic analysis of Oligocene mammals from Quebrada Fiera, Mendoza, Argentina, filling a major gap in South American paleontology. It reveals a latitudinal gradient in aridity due to the Andean rain shadow and highlights the role of (semi)permanent water bodies in sustaining diverse herbivore communities. Additionally, it
Dánae Sanz‐Pérez, Santiago Hernández Del Pino, Esperanza Cerdeño, Manuel Hernández Fernández, Laura Domingo   +4 more
wiley   +1 more source

The Arctic and Antarctic Sea-Ice Area Index Records versus Measured and Modeled Temperature Data

Advances in Meteorology, 2015
Here we study the Arctic and Antarctic sea-ice area records provided by the National Snow and Ice Data Center (NSIDC). These records reveal an opposite climatic behavior: since 1978 the Arctic sea-ice area index decreased, that is, the region has warmed,
Nicola Scafetta, Adriano Mazzarella
doaj   +1 more source

Genome Expansion of ZPB1(a) and ZPC1(a) in Basal Species or Liver Expression of ZPB1a and ZPC1aa in Advanced Species, Two Different Strategies to Ensure Sufficient ZP Synthesis in Teleosts

Integrative Zoology, EarlyView.
We found that teleosts employed two different strategies to ensure sufficient ZP (zona pellucida) synthesis: expansion of ZPB1(a) and ZPC1(a) in basal species or liver expression of ZPB1a and ZPC1aa in advanced species. The N‐terminus of expanded ZPB1(a) or ZPC1(a) and liver‐expressed ZPB1a contains repeated units or low‐complexity regions to form ...
Tian Gao, Suying Ma, Shiyi Zhang, Fan Bai, Lingyao Gan, Wenjing Tao, Feilong Wang, Deshou Wang, Lina Sun   +8 more
wiley   +1 more source