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Articles 31 - 37 of 37
Full-Text Articles in Physical Sciences and Mathematics
Mass Balance And Accumulation Rate Along Us Itase Routes, Gordon Hamilton
Mass Balance And Accumulation Rate Along Us Itase Routes, Gordon Hamilton
University of Maine Office of Research Administration: Grant Reports
The primary research activities in this project involved our participation in the four US ITASE field seasons (1999-2003). As part of the field program we collected ~5,500 km of continuous, precise GPS data along the traverse route. These geodetic data are used by ourselves and several other US ITASE investigators. We also installed 15 new mass balance (coffee can) stations in rarely visited regions of West and East Antarctica. Several shallow firn cores were collected to study local variability in snow accumulation around deeper 200-year ice core sites. As part of our collaboration with NASA, we performed detailed 3-dimensional mapping …
A Science Management Office For The U. S. Component Of The International Trans Antarctic Expedition (Us Itase Smo)Ûa Collaborative Pgrm Of Research From S. Pole To N. Victoria Land, Paul A. Mayewski, Gordon S. Hamilton
A Science Management Office For The U. S. Component Of The International Trans Antarctic Expedition (Us Itase Smo)Ûa Collaborative Pgrm Of Research From S. Pole To N. Victoria Land, Paul A. Mayewski, Gordon S. Hamilton
University of Maine Office of Research Administration: Grant Reports
This award supports a science management office for a pilot ice-core drilling and analysis program to test the feasibility of obtaining well-dated, high-resolution isotope and chemistry records from East Antarctica. Shallow ice cores will be obtained from two locations: 1) ~100 km from South Pole towards the Pole of Inaccessibility, as an extension of the Byrd Station-to-South Pole ITASE traverse [International Trans Antarctic Scientific Expedition]; 2) at Taylor Dome, near the original deep coring site, and (3) possibly at AGO 3 and AGO 4 as part of a logistics traverse to these sites. All of the cores collected will be …
Hydrodynamic Regulation Of Reproduction In Fucoid Algae: A Regional Model And Consequences For Population Structure, Susan H. Brawley
Hydrodynamic Regulation Of Reproduction In Fucoid Algae: A Regional Model And Consequences For Population Structure, Susan H. Brawley
University of Maine Office of Research Administration: Grant Reports
Fucoid algae dominate most rocky shores across the north Atlantic and contribute substantially to structuring of the coastal ecosystem. Reproduction in fucoid algae is sensitive to hydrodynamic conditions, resulting in high fertilization success because gamete release occurs only under calm conditions. These findings have important implications for asynchrony in gamete release between populations and the scale of population isolation. This study will 1) test a nascent model describing when successful fucoid reproduction can occur, 2) determine whether hybridization between Fucus vesiculosus and other fucoid algae occurs when gamete release is delayed by turbulent conditions, and 3) analyze whether genetic differentiation …
Collaborative Research: Incorporation Of Sensors Into Autonomous Gliders For 4-D Measurement Of Bio-Optical And Chemical Parameters, Mary Jane Perry
Collaborative Research: Incorporation Of Sensors Into Autonomous Gliders For 4-D Measurement Of Bio-Optical And Chemical Parameters, Mary Jane Perry
University of Maine Office of Research Administration: Grant Reports
This research project is conducted under the auspices of the National Oceanographic Partnership Program (NOPP). Partners include the Univ. of Maine, Univ. of Washington, several commercial instrument manufacturers, and two local government agencies. The project addresses an ocean sciences requirement for new ocean observational capabilities for continuous, high-resolution measurements of oceanic processes that include characterization of distributions, mechanisms, and rates of processes involving chemical and biological variables together with physical variables in the ocean. The overall objective is to add new capabilities to a small (1.8 m, 52 kg) autonomous underwater glider that moves horizontally and vertically using variable buoyancy …
Collaborative Research: Functional And Genomic Analysis Of Polysymbiosis In The Wood-Boring Bivalve Lyrodus Pedicellatus, Daniel L. Distel
Collaborative Research: Functional And Genomic Analysis Of Polysymbiosis In The Wood-Boring Bivalve Lyrodus Pedicellatus, Daniel L. Distel
University of Maine Office of Research Administration: Grant Reports
Each day massive quantities of wood and woody plant materials enter the oceans, providing resources upon which a large variety of marine organisms depend. However, the biological communities supported by marine wood are only poorly understood. Globally, the most important consumers of marine wood are wood-boring bivalves of the family Teredinidae (shipworms, primarily found above 150 m) and Pholadidae (subfamily Xylophagainae, primarily found in the deep sea, 150-8000 m). These clams depend on intracellular endosymbiotic bacteria (endocytobionts) to help them consume a substrate (lignocellulose) that cannot be utilized by most other animals. Two functions have been proposed for symbionts of …
Hands-On Oceanography. Settling Of Particles In Aquatic Environments Low Reynolds Numbers, Emmanuel Boss, Lee Karp-Boss, Peter A. Jumars
Hands-On Oceanography. Settling Of Particles In Aquatic Environments Low Reynolds Numbers, Emmanuel Boss, Lee Karp-Boss, Peter A. Jumars
Marine Sciences Faculty Scholarship
The purpose of this activity is to familiarize students with how a particle’s size, shape and orientation affects its settling at low Reynolds numbers. This activity can also be used to teach statistical skills (e.g., replication of measurements, propagation of error, type I vs. type II regressions).
Potential Of Argo Drifters For Estimating Biological Production Within The Water Column, Seung Hyun Son, Emmanuel Boss, Jae Hoon Noh
Potential Of Argo Drifters For Estimating Biological Production Within The Water Column, Seung Hyun Son, Emmanuel Boss, Jae Hoon Noh
Marine Sciences Faculty Scholarship
Argo drifters provide information of the vertical structure in the water column and have a potential for the improvement of understanding phytoplankton primary production and biogeochemical cycles in combination with ocean color satellite data, which can obtain the horizontal distribution of phytoplankton biomass in the surface layer. Our examples show that using Argo drifters with satellite-measured horizontal distribution of phytoplankton biomass at the sea surface allow an improved understanding of the development of the spring bloom. The other possible uses of Argo drifter are discussed.