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173 Titles Match Your Query
Showing 1 through 50 of 173 Next
1. Validating contrasting terrestrial climate-sensitive Pliocene deposits through high resolution modeling of paleo-environments in the Transantarctic Mountains [NSF-ANT13-54231]
Intellectual Merit: Neogene sediment records recovered by ANDRILL suggest multiple events of open water conditions and elevated sea surface temperatures at times when terrestrial data from the McMurdo ...


2. Collaborative Research: Dating and Paleoenvironmental Studies on Ancient Ice in the Dry Valleys, Antarctica [NSF-ANT06-36731]
This project studies ancient ice buried in the Dry Valleys of Antarctica. The ice, which may approach ten million years in age, will be dated using argon and uranium radioisotope techniques. High-risk ...


3. History of the East Antarctic Ice Sheet since the mid-Miocene: New Evidence from Provenance of Ice-rafted Debris [NSF-ANT09-44489]
Intellectual Merit: The PIs propose to study the stability and dynamics of the East Antarctic ice sheet during the Pliocene in the area of the Wilkes and Aurora subglacial basins. Models indicate ...


4. Collaborative Studies of the Antarctic Mesosphere and Lower Thermosphere [NSF-ANT05-38672]
A meteor radar was installed at the South Pole in 2001 and operated intermittently through 2011. The system provides measurements of the horizontal wind field around 95km in 4 distinct viewing directions. ...


5. High Resolution Genomic and Proteomic Analyses of a Microbial Transport Mechanism from Antarctic Marine Waters to Permanent Snowpack [NSF-ANT10-43265]
The relatively pristine Antarctic continent with its extensive maritime zone represents a unique location on the planet to investigate the long distance aerial transport and deposition of marine microorganisms. ...


6. Collaborative Research in IPY: Abrupt Environmental Change in the Larsen Ice Shelf System, a Multidisciplinary Approach -- Cryosphere and Oceans [NSF-ANT07-32651]
Scambos/0732921,Pettit/0732738,Gordon/0732651,Truffer/0732602,Mosley-Thompson/0732655. Like no other region on Earth, the northern Antarctic Peninsula represents a spectacular natural laboratory ...


7. Collaborative Research: Pleistocene East Antarctic Ice Sheet History as Recorded in Sediment Provenance and Chronology of High-elevation TAM Moraines [NSF-ANT09-44475]
Intellectual Merit: The proposed work will investigate changes in the compositional variation of glacial tills over time across two concentric sequences of Pleistocene moraines located adjacent to ...


8. New Approach to Investigate the Seismic Velocity Structure beneath Antarctica [NSF-ANT11-39739]
Intellectual Merit: Numerous candidate models for the geologic processes that have shaped the Antarctic continent have been proposed. To discriminate between them, detailed images of the upper mantle ...


9. EAGER: Are the Dry Valleys Getting Wetter? A Preliminary Assessment of Wetness Across the McMurdo Dry Valleys Landscape [NSF-ANT10-45215]
Intellectual Merit: Until recently, wetted soils in the Dry Valleys were generally only found adjacent to streams and lakes. Since the warm austral summer of 2002, numerous "wet spots" have been observed ...


10. Submarine and On-Land Volcanism in the West Antarctic Rift System: A Petrologic and Geochemical Study to Assess Melting Processes and Eruption History [NSF-ANT13-21588]
This project is a geochemical study of volcanic rocks from the West Antarctic Rift system. Its goal is to understand the link between mantle composition and the diverse, regional geodynamic processes, ...


11. Ammonia Oxidation Versus Heterotrophy in Crenarchaeota Populations from Marine Environments West of the Antarctic Peninsula [NSF-ANT08-38996]
Ammonia oxidation is the first step in the conversion of regenerated nitrogen to dinitrogen gas, a 3-step pathway mediated by 3 distinct guilds of bacteria and archaea. Ammonia oxidation and the overall ...


12. RAPID: Linking the Movement Patterns and Foraging Behavior of Humpback Whales to their Prey across Multiple Spatial Scales within the LTER Study Region [NSF-ANT12-50208]
Whales play a central role in the ecology and biogeochemistry of the Southern Ocean. However, little is known regarding their distribution and behavior, in part because of challenges associated with ...


13. Collaborative Research: East Antarctic outlet glacier contributions to the Ross Sea from chronology of detrital grains [NSF-ANT10-43619]
Intellectual Merit: The PIs proposed a provenance study of glacial deposits in the Ross Embayment that will provide a broad scale geochronologic survey of detrital minerals in till to help characterize ...


14. Collaborative Research: Modeling and synthesis study of a natural iron fertilization site in the Southern Drake Passage [NSF-ANT09-48338]
The ocean plays a critical role in sequestering CO2 by exporting fixed carbon to the deep ocean through the biological pump. There is a pressing need to understand the systematics of carbon export ...


15. PostDoctoral Research Fellowship [NSF-ANT10-19305]
Survival of Antarctic notothenioid fishes in the context of global climate change will depend upon the impact of rising oceanic temperatures on their embryonic development, yet little is known regarding ...


16. Southern Ocean Diatom Taphonomy and Paleoproductivity: A Laboratory Study of Silica Degradation and Export [NSF-ANT10-43690]
Intellectual Merit: Diatom abundance in sediment cores is typically used as a proxy for paleo primary productivity. This record is complicated by variable preservation, with most loss occurring in ...


17. Fate of Drilling Fluids during the South McMurdo Sound Project (SMS) of the Antarctic Geological Drilling Program (ANDRILL) [NSF-ANT10-43740]
The PI proposes to utilize computer models used by hydrogeologists to establish the fate and transport of contamination and determine the extent of drilling fluid contamination in the ANDRILL SMS ...


18. Thermochronologic and modelling test for a Mesozoic West Antarctic Plateau [NSF-ANT07-39781]
This project studies formation of the TransAntarctic Mountains (TAM) through numerical modeling based on cooling histories of apatite mineral grains. The TAM are the highest and longest rift-related ...


19. Collaborative Research: Hunting in Darkness: Behavioral and Energetic Strategies of Weddell Seals in Winter [NSF-ANT07-39390]
Intellectual merit: Weddell seals (Leptonychotes weddellii) locate and capture sparsely distributed and mobile prey under shore-fast ice throughout the year, including the austral winter when ambient ...


20. Collaborative Research: Multispecies, Multiscale Investigations of Longterm Changes in Penguin and Seabird Populations on the Antarctic Peninsula [NSF-ANT07-39515]
This five-year project seeks to characterize decadal scale changes in penguin and seabird populations on the Antarctic Peninsula, and to identify the factors driving these long-term changes. Two interconnected ...


21. Collaborative Research: Weddell seals as autonomous sensors of the winter oceanography of the Ross Sea [0838937]
Marine mammals of the Southern Ocean have evolved diverse life history patterns and foraging strategies to accommodate extreme fluctuations in the physical and biological environment. In light of ...


22. Collaborative Research; IPY: Ocean-Ice Interaction in the Amundsen Sea sector of West Antarctica [NSF-ANT07-32804]
The Office of Polar Programs, Antarctic Integrated and System Science Program has made this award to support an interdisciplinary study of the effects of the ocean on the stability of glacial ice ...


23. Mount Erebus Volcano Observatory: Operations, Science and Outreach (MEVO-OSO) [NSF-ANT11-42083]
Intellectual Merit: Mt. Erebus is one of only a handful of volcanoes worldwide that have lava lakes with readily observable and nearly continuous Strombolian explosive activity. Erebus is also unique ...


24. Collaborative Research: Weddell seals as autonomous sensors of the winter oceanography of the Ross Sea [NSF-ANT08-38892]
Marine mammals of the Southern Ocean have evolved diverse life history patterns and foraging strategies to accommodate extreme fluctuations in the physical and biological environment. In light of ...


25. Real-Time Characterization of Adelie Penguin Foraging Environment Using an Autonomous Underwater Vehicle [NSF-ANT10-19838]
The Antarctic Peninsula is among the most rapidly warming regions on earth. Increased heat from the Antarctic Circumpolar Current has elevated the temperature of the 300 m of shelf water below the ...


26. Microtubule Function, Protein Folding, and Embryogenesis in Antarctic Fishes: An Integrative Approach [NSF-ANT09-44517]
Since the advent of Antarctic continental glaciation, the opening of the Drake Passage between South America and the Antarctic Peninsula, and the onset of cooling of the Southern Ocean ~40-25 million ...


27. The Cellular Stress Response in Cold-adapted Organisms: Building Novel Mechanistic Links between Heat Stress, Cell Cycle Arrest and Apoptosis in Antarctic Fishes. [NSF-ANT09-44743]
The research will investigate a novel mechanism by which cold-adapted fishes of the Southern Ocean sense and respond to elevated temperatures. It is hypothesized that sub-lethal heat stress may induce ...


28. Collaborative Research in IPY: Abrupt Environmental Change in the Larsen Ice Shelf System, a Multidisciplinary Approach - Marine and Quaternary Geosciences [NSF-ANT07-32625]
This award supports a research cruise to perform geologic studies in the area under and surrounding the former Larsen B ice shelf, on the Antarctic Peninsula. The ice shelf's disintegration in 2002 ...


29. Collaborative Research: Biogeochemistry of Cyanobactrial Mats and Hyporheic Zone Microbes in McMurdo Dry Valley Glacial Meltwater Streams [NSF-ANT07-39648]
The glacial streams of the McMurdo Dry Valleys have extensive cyanobacterial mats that are a probable source of fixed C and N to the Valleys. The research will examine the interplay between the microbial ...


30. Collaborative Research: Geochemistry and Microbiology of the Extreme Aquatic Environment in Lake Vida, East Antarctica [NSF-ANT07-39681]
Lake Vida is the largest lake of the McMurdo Dry Valleys, with an approximately 20 m ice cover overlaying a brine of unknown depth with at least 7 times seawater salinity and temperatures below -10 ...


31. Collaborative Research: Geochemistry and Microbiology of the Extreme Aquatic Environment in Lake Vida, East Antarctica [NSF-ANT07-39698]
Lake Vida is the largest lake of the McMurdo Dry Valleys, with an approximately 20 m ice cover overlaying a brine of unknown depth with at least 7 times seawater salinity and temperatures below -10 ...


32. Photoheterotrophic Microbes in the West Antarctic Peninsula Marine Ecosystem [NSF-ANT08-38830]
Light quality and availability are likely to change in polar ecosystems as ice coverage and thickness decrease. How microbes adjust to these and other changes will have huge impacts on the polar marine ...


33. A Broadband Seismic Experiment to Image the Lithosphere Beneath the Gamburtsev Mountains and Surrounding Areas, East Antarctica [NSF-ANT05-37371]
This award supports a seismological study of the Gamburtsev Subglacial Mountains (GSM), a Texas-sized mountain range buried beneath the ice sheets of East Antarctica. The project will perform a passive ...


34. Acoustic Assessment of Southern Ocean Salps and Their Ecosystem Impact [NSF-ANT09-44042]
The importance of gelatinous zooplankton in marine systems worldwide is increasing. In Southern Ocean, increasing salp densities could have a detrimental effect on higher predators, including penguins, ...


35. Application of Detrital Zircon Isotope Characteristics and Sandstone Analysis of Beacon Strata to the Tectonic Evolution of the Antarctic Sector of Gondwana [NSF-ANT09-44532]
Intellectual Merit: The goal of this project is to address relationships between foreland basins and their tectonic settings by combining detrital zircon isotope characteristics and sedimentological ...


36. Linkages among Mitochondrial Form, Function and Thermal Tolerance of Antarctic Notothenioid Fishes [NSF-ANT11-42720]
Antarctic notothenioid fishes have evolved in the Southern Ocean for 10-14 MY under an unusual set of circumstances. Their characteristics include the complete absence of the circulating oxygen-binding ...


37. Genomic Approaches to Resolving Phylogenies of Antarctic Notothenioid Fishes [NSF-ANT08-39007]
The teleost fish fauna in the waters surrounding Antarctica are completely dominated by a single clade of closely related species, the Notothenioidei. This clade offers an unprecedented opportunity ...


38. Linkages among Mitochondrial Form, Function and Thermal Tolerance of Antarctic Notothenioid Fishes [NSF-ANT07-41301]
Antarctic notothenioid fishes have evolved in the Southern Ocean for 10-14 MY under an unusual set of circumstances. Their characteristics include the complete absence of the circulating oxygen-binding ...


39. Modeling and Synthesis Study of a Natural Iron Fertilization Site in the Southern Drake Passage [NSF-ANT09-48357]
The ocean plays a critical role in sequestering CO2 by exporting fixed carbon to the deep ocean through the biological pump. There is a pressing need to understand the systematics of carbon export ...


40. The Role of Snow Patches on the Spatial Distribution of Soil Microbial Communities and Biogeochemical Cycling in the Antarctic Dry Valleys [NSF-ANT08-38850]
Two models have been proposed to describe controls over microbial biogeography. One model proposes that microbes are ubiquitously distributed across the global environment, and that environmental ...


41. Seasonal Evolution of Chemical and Biological Variability in the Ross Sea [NSF-ANT08-38948]
Abstract This award is funded under the American Recovery and Reinvestment Act of 2009 (Public Law 111-5). The Ross Sea is a highly productive area within the Southern Ocean, but it experiences ...


42. The Chemical Ecology of Shallow-water Marine Macroalgae and Invertebrates on the Antarctic Peninsula [NSF-ANT08-38773]
The near shore environments of the western Antarctic Peninsula (WAP) harbor extremely high densities of mesograzers (small invertebrate predators approximately 1-25 mm in length) such as benthic amphipods, ...


43. The Chemical Ecology of Shallow-water Marine Macroalgae and Invertebrates on the Antarctic Peninsula [NSF-ANT08-38776]
The near shore environments of the western Antarctic Peninsula (WAP) harbor extremely high densities of mesograzers (small invertebrate predators approximately 1-25 mm in length) such as benthic amphipods, ...


44. Weddell seals as autonomous sensors of the winter oceanography of the Ross Sea [NSF-ANT08-38911]
Marine mammals of the Southern Ocean have evolved diverse life history patterns and foraging strategies to accommodate extreme fluctuations in the physical and biological environment. In light of ...


45. Alternative Nutritional Strategies in Antarctic Protists [NSF-ANT08-38955]
This award is funded under the American Recovery and Reinvestment Act of 2009 (Public Law 111-5). Most organisms meet their carbon and energy needs using photosynthesis (phototrophy) or ingestion/assimilation ...


46. Metabolic Activities and Gene Expression of Marine Psychrophiles in Cold Ice [NSF-ANT07-39783]
The mechanisms enabling bacteria to be metabolically active at very low temperatures are of considerable importance to polar microbial ecology, astrobiology, climate and cryopreservation. This research ...


47. Thermoregulation in Free-Living Antarctic Seals: The Missing Link in Effective Ecological Modeling [NSF-ANT10-43779]
Despite being an essential physiological component of homeotherm life in polar regions, little is known about the energetic requirements for thermoregulation in either air or water for high- latitude ...


48. Mount Erebus Volcano Observatory III (MEVO III): Conduit Processes and Surveillance [NSF-ANT08-38817]
This award is funded under the American Recovery and Reinvestment Act of 2009 (Public Law 111-5). Mount Erebus is Antarctica's most active volcano that has been in a persistent state of activity for ...


49. The Sea Ice System in Antarctic Summer, Oden Southern Ocean Expedition (OSO 2010-11) [NSF-ANT08-39053]
Several aspect of the seasonal melting and reformation cycle of Antarctic sea ice appear to be divergent from those occurring in the Arctic. This is most clearly demonstrated by the dramatic diminishing ...


50. A Comparison of Conjugate Auroral Electojet Indices [NSF-ANT10-43621]
The auroral electrojet index (AE) is used as an indicator of geomagnetic activity at high latitudes representing the strength of auroral electrojet currents in the Northern polar ionosphere. A similar ...


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