Thumbnail Icon [Personnel: Last_Name='ARKO', Middle_Name='A.', First_Name='ROBERT']


Refine by Category
 
Refine by Full text

 

438 Titles Match Your Query
Showing 1 through 50 of 438 Next
1. Origin of Persistent Organic Pollutants in the Antarctic Atmosphere, Snow and Marine Food Web [NSF-ANT13-32492]
Many persistent organic pollutants (POPs), though banned in the U.S. since the 1970s, remain in the environment and continue to reach hitherto pristine regions such as the Arctic and Antarctic. The ...


2. Retrospective Analysis of Antarctic Tracking data (RAATD): International Crabeater and Weddell Seal Tracking Data Sets [NSF-ANT13-21782]
Identifying the basic habitat requirements of Antarctic predators is fundamental to understanding how they will respond to the human-induced challenges of commercial fisheries and climate change. ...


3. 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, ...


4. The effects of ocean acidification and rising sea surface temperatures on shallow-water benthic organisms in Antarctica [NSF-ANT10-41022]
The research will investigate the individual and combined effects of rising ocean acidification and sea surface temperatures on shallow-water calcified benthic organisms in western Antarctic Peninsular ...


5. Magnetostratigraphy of Cretaceous Sediments in the James Ross Island Basin, Antarctica [NSF-ANT13-03896]
The PI will collect samples to extend the magneto-stratigraphic record of late Cretaceous sediments of the James Ross Basin, Antarctica. RAPID support will allow him to take advantage of an invitation ...


6. Collaborative Research: Controls over the Spatial Distribution and Activity of Microbial Communities in Antarctic Soils [NSF-ANT09-44556]
Advances in molecular techniques have expanded our understanding of soil microbial communities, and raised important questions about regional and global patterns in microbial diversity. The proposed ...


7. 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 ...


8. ASPIRE: Amundsen Sea Polynya International Research Expedition [NSF-ANT09-44727]
ASPIRE is an NSF-funded project that will examine the ecology of the Amundsen Sea during the Austral summer of 2010. ASPIRE includes an international team of trace metal and carbon chemists, phytoplankton ...


9. Collaborative Research: IPY: POLENET-Antarctica: Investigating Links Between Geodynamics and Ice Sheets [NSF-ANT06-32322]
This project constructs POLENET a network of GPS and seismic stations in West Antarctica to understand how the mass of the West Antarctic ice sheet (WAIS) changes with time. The information is ultimately ...


10. 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 ...


11. Does the Strength of the Carbonate Pump Change with Ocean Stratification and Acidification and How? [NSF-ANT10-40957]
This project will improve the ability to predict the response of the carbonate pump to ocean acidification and stratification through enhanced understanding of the controlling factors of the export ...


12. Environmental Genomics in an Antarctic polychaete [NSF-ANT09-44557]
Genome-enabled biology provides a foundation for understanding the genetic basis of organism-environment interactions. . The research project links gene expression, genome methylation, and metabolic ...


13. Effect of Ocean Acidification on Early Life History Stages of the Antarctic Sea Urchins Sterechinus Neumayeri [NSF-ANT09-44201]
This research examines the effects of ocean acidification on embryos and larvae of a contemporary calcifier in the coastal waters of Antarctica, the sea urchin Sterechinus neumayeri. The effect of ...


14. Exploring A 2 Million + Year Ice Climate Archive-Allan Hills Blue Ice Area (2MBIA) [NSF-ANT08-38849]
This award supports a project to generate an absolute timescale for the Allan Hills Blue Ice Area (BIA), and then to reconstruct details of past climate changes and greenhouse gas concentrations for ...


15. Collaborative Research: Integrative Study of Marine Ice Sheet Stability and Subglacial Life Habitats in West Antarctica - Lake and Ice Stream Subglacial Access Research Drilling (LISSARD) [NSF-ANT08-39142]
The LISSARD project (Lake and Ice Stream Subglacial Access Research Drilling) is one of three research components of the WISSARD integrative initiative (Whillans Ice Stream Subglacial Access Research ...


16. Collaborative Research: EAGER: Evaluating the Larsen Basin's Suitability for Testing the Cretaceous Glaciation Hypothesis [NSF-ANT12-41460]
Intellectual Merit: Recent geochemical, sequence stratigraphic, and integrated investigations of marine strata from several continental margins and ocean basins suggest that ephemeral ice sheets may ...


17. Collaborative Research in IPY: Abrupt Environmental Change in the Larsen Ice Shelf System, a Multidisciplinary Approach - Marine Ecosystems. [NSF-ANT07-32983]
Collaborative Research in IPY: Abrupt Environmental Change in the Larsen Ice Shelf System, a Multidisciplinary Approach - Marine Ecosystems. A profound transformation in ecosystem structure and function ...


18. The Physiological Ecology of Two Antarctic Icons: Emperor Penguins and Leopard Seals [NSF-ANT09-44220]
Emperor penguins (Aptenodytes forsteri) and leopard seals (Hydrurga leptonyx) are iconic, top predators in Antarctica. Understanding their physiological ecology is essential to the assessment of their ...


19. Ecophysiology of DMSP and related compounds and their contributions to carbon and sulfur dynamics in Phaeocystis antarctica [NSF-ANT09-44686]
Spectacular blooms of Phaeocystis antarctica in the Ross Sea, Antarctica are the source of some of the world's highest concentrations of dimethylsulfoniopropionate (DMSP) and its volatile degradation ...


20. Collaborative Research: Polyphase Orogenesis and Crustal Differentiation in West Antarctica [NSF-ANT09-44615]
Intellectual Merit: The northern Ford ranges in Marie Byrd Land, Antarctica, record events and processes that transformed a voluminous succession of Lower Paleozoic turbidites intruded by calc-alkaline ...


21. Microbially Mediated Alteration of Volcanic Glass using McMurdo Extreme Environments as Natural Laboratories [NSF-ANT07-39712]
This project studies the microbial processes that alter volcanic glass, which is critical to understanding the earliest life on earth. To understand the environmental controls on these processes, ...


22. Roles for Dehydration and Photoperiodism in Preparing an Antarctic Insect for the Polar Night [NSF-ANT08-37559]
Polar terrestrial environments are often described as deserts, where water availability is a critical factor limiting the distribution of terrestrial organisms. In such environments, tolerance of ...


23. Collaborative Research: The Biogeochemical Evolution of Dissolved Organic Matter in a Fluvial System on the Cotton Glacier, Antarctica [NSF-ANT08-38970]
Dissolved organic matter (DOM) comprises a significant pool of Earth's organic carbon that dwarfs the amount present in living aquatic organisms. The properties and reactivity of DOM are not well ...


24. Functional Genomics and Physiological Ecology of Seasonal Succession in Antarctic Phytoplankton: Adaptations to Light and Temperature [NSF-ANT10-43532]
The proposed research will investigate the genomic basis of the physiological and ecological transition of Antarctic marine phytoplankton from a cold dark winter to a warmer, brighter spring. During ...


25. Geodynamic Models of Subsidence and Lithospheric Flexure at the ANDRILL Drill Sites: Implications for Cenozoic Tectonics and Ice Sheet History [NSF-ANT10-43700]
Intellectual Merit: This research will place the subsidence history of the southern Victoria Land Basin into a quantitative geodynamic context and will assess the influence of flexure associated with ...


26. 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 ...


27. 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 ...


28. 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 ...


29. 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. ...


30. 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. ...


31. 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 ...


32. 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 ...


33. 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 ...


34. 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 ...


35. 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, ...


36. 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 ...


37. 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 ...


38. Marine Geoscience Data System (MGDS) [OBIS_MGDS]
Seafloor biological specimens taken from NSF Ridge2000 expeditions.


39. 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 ...


40. 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 ...


41. 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 ...


42. 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 ...


43. 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 ...


44. 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 ...


45. 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 ...


46. 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 ...


47. 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 ...


48. 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 ...


49. 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 ...


50. 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 ...


Showing 1 through 50 of 438 Next
Click here for a static view of records.

Link to Web Site