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Full-Text Articles in Physical Sciences and Mathematics
A New Ice Core From The Devon Ice Cap Canadian Arctic: Continued Development Of High-Resolution Proxy Records To Evaluate The Regionalization Of Climate In The Circum-Arctic, George A. Zielinski, Cameron Wake
A New Ice Core From The Devon Ice Cap Canadian Arctic: Continued Development Of High-Resolution Proxy Records To Evaluate The Regionalization Of Climate In The Circum-Arctic, George A. Zielinski, Cameron Wake
University of Maine Office of Research Administration: Grant Reports
The primary goal of this project was to collect an ice core from the Summit of the Devon Ice Cap, Devon Island, Canadian Arctic. A 302-m core was collected during the spring of 1998 with additional field work in 1999. Individuals supported by this grant participated in the field work, although the GSC did the actual drilling. Glacier flow models as well as physical characteristics of the ice and d18O records suggest that basal ice recovered is about 86,000 years old. The first 200 meters were collected under dry drilling conditions, whereas the final 52 meters were collected with a …
Examination Of The 500,000-Year Climate Record In Ice At Mt. Moulton, West Antarctica, Gregory A. Zielinski, Paul Andrew Mayewski
Examination Of The 500,000-Year Climate Record In Ice At Mt. Moulton, West Antarctica, Gregory A. Zielinski, Paul Andrew Mayewski
University of Maine Office of Research Administration: Grant Reports
This project was a pilot project to determine if the ice on Mt. Moulton provides a reliable record of past climatic conditions. The area of study is a several hundred-meter section of blue ice (Trench A) that spans the time period from approximately the early Holocene to over 492k years ago. Dating control is obtained through radiometrically-dated tephra layers (i.e., air fall deposits) within the section (Figure 1) originating from the adjacent Mt. Berlin. Fieldwork during the 1999-2000 field season included the trenching of the complete section with electric chain saws mounted on a wheeled frame. Blocks were extracted and …
(Esh) Holocene Climate Variability, Paul Andrew Mayewski, Loreen Meeker
(Esh) Holocene Climate Variability, Paul Andrew Mayewski, Loreen Meeker
University of Maine Office of Research Administration: Grant Reports
With the successful completion of deep drilling at Summit Greenland there is now a well-dated, high resolution, multi-parameter record of climate change (response and forcing) for the Northern Hemisphere that covers the last glacial cycle. This record reveals evidence of rapid and dramatic change in climate. Recent examination of the Holocene portion (last 11,500 years) of the Greenland record has demonstrated that, while relatively stable by comparison with glacial age climate, the Holocene does contain subdued versions of glacial age millennial scale and rapid climate change events. The Holocene is also characterized by significant annual to centennial scale variability plus …
Food Substrates And Digestive Capabilitites Of Marine Deposit Feeders, Lawrence M. Mayer
Food Substrates And Digestive Capabilitites Of Marine Deposit Feeders, Lawrence M. Mayer
University of Maine Office of Research Administration: Grant Reports
Deposit feeders play several important roles in determining whether organic material is demineralized or buried. These animals function to make surfaces available for microbial growth and move particles both horizontally and vertically within the seabed at a pace that far exceeds sedimentation. The central problem in understanding deposit feeders is to identify the materials that they utilize and to determine the sources of those materials. The interdisciplinary approach of this project is to combine a chemical reactor theory of digestion with measurements of the processing of enzymatically available amino acids, focusing on rates of hydrolysis in, and absorption from, the …
Remote Sensing Of The Ne Pacific: Retrospective And Concurrent Time Series Analysis Using Multiple Sensors On Multiple Scales, Andrew C. Thomas
Remote Sensing Of The Ne Pacific: Retrospective And Concurrent Time Series Analysis Using Multiple Sensors On Multiple Scales, Andrew C. Thomas
University of Maine Office of Research Administration: Grant Reports
A significant number of physical and biological variables covary within and between the boundary currents of the subarctic and subtropical gyres in the NE Pacific Ocean. These (summarized in US GLOBEC Reports 17, 11 and 7) include the strength of the transports, surface temperatures, zooplankton biomass and the catch of commercially important fishes. Time scales range from individual events to interdecadal regime shifts. The mechanisms by which these physical and biological fields covary are unknown, but it is postulated that the same mechanisms involved in interannual variability also affect long term climatic variability. Clarification and quantification of the mechanisms governing …