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Oceanography and Atmospheric Sciences and Meteorology
University of Maine Office of Research Administration: Grant Reports
- Keyword
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- Biological Oceanography (2)
- Climate Change (2)
- Antarctic Glaciology (1)
- Aqueous solutions (1)
- Bacteria (1)
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- Biological oceanography (1)
- Bolling warming (1)
- Bradyrhizobium japonicum (1)
- Carbon monoxide (1)
- Climatology (1)
- Deep-Ocean Sensors (1)
- Geophysics (1)
- Glacial meltwater pulses (1)
- Laurentide Ice Sheet (1)
- Marine geology (1)
- Marine science (1)
- Mycobacterium smegmatis (1)
- Ocean chemistry (1)
- Ocean climate (1)
- Phytoplankton (1)
- Qdots (1)
- Sea-level changes (1)
Articles 1 - 10 of 10
Full-Text Articles in Physical Sciences and Mathematics
U.S.-Korea Cooperative Research: Carbon Monoxide As A Substrate For Microbial Maintenance, Gary M. King
U.S.-Korea Cooperative Research: Carbon Monoxide As A Substrate For Microbial Maintenance, Gary M. King
University of Maine Office of Research Administration: Grant Reports
Bacteria play an important role in the global budget of carbon monoxide (CO). Largely unknown bacterial populations in soils and the water column of aquatic systems oxidize hundreds of teragrams per year, or about 10%-20% of the estimated annual flux to the atmosphere. In spite of their biogeochemical significance, relatively little is known about the identity of CO-oxidizing populations active in situ, their phylogenic and physiological diversity or the importance of CO as substrate for their basic metabolic needs. of CO oxidizers. It is clear that CO at high concentrations (> 1000 ppm) can serve as a sole source of …
Sger: Is Bolling Warming Recorded By The Southeastern Margin Of The Laurentide Ice Sheet?, Harold W. Borns Jr., Brenda Hall
Sger: Is Bolling Warming Recorded By The Southeastern Margin Of The Laurentide Ice Sheet?, Harold W. Borns Jr., Brenda Hall
University of Maine Office of Research Administration: Grant Reports
This award, under the auspices of the Small Grants for Exploratory Research (SGER) program, uses funds to increase the chronologic control for the southeastern margin of the Laurentide Ice Sheet (LIS). Ultimately, the researchers want to explore whether they are able to document the response of the ice sheet to major shifts in atmospheric temperature and assess the ability of the ice sheet to produce large volumes of meltwater.
The effect of prominent climate events, such as the Bolling warming (13,000 radiocarbon years before present), on the dynamics of the Laurentide Ice Sheet (LIS) remains unknown and yet has important …
Collaborative Proposal: Form And Function Of Phytoplankton In Unsteady, Low Reynolds-Number Flows, Peter Jumars, Lee Karp-Boss
Collaborative Proposal: Form And Function Of Phytoplankton In Unsteady, Low Reynolds-Number Flows, Peter Jumars, Lee Karp-Boss
University of Maine Office of Research Administration: Grant Reports
Small-scale flow dynamics at low Reynolds numbers (Re) are important to phytoplankton cells in delivery of nutrients, sensory detection by and physical encounter with herbivores, accumulation of bacterial populations in the "phycosphere" or region immediately surrounding phytoplankton cells and coagulation of cells themselves as a mechanism terminating blooms. In nature most phytoplankton experience unsteady flows, i.e., velocities near the cells that vary with time due to the intermittency of turbulence and to discontinuous, spatially distributed pumping by herbivores. This unsteadiness has not previously been taken into account in models or measurements with plankton. Moreover, there have been decade- and century- …
Sensors: Collaborative Research: Aloha Mooring Sensor Network And Adaptive Sampling, Emmanuel S. Boss
Sensors: Collaborative Research: Aloha Mooring Sensor Network And Adaptive Sampling, Emmanuel S. Boss
University of Maine Office of Research Administration: Grant Reports
The PIs propose to develop a moored deep-ocean sensor network that will first be installed at the Hawaii Ocean Time-series (HOT)/ALOHA Observatory (AO) and then at other cabled observatory sites as they are implemented. This moored sensor network is based on a profiler that will move between near-surface and fixed abyssal sensors under program control. The PIs feel that this project will demonstrate the scientific potential of combining adaptive sampling methods with a moored series of profiling sensors. The PIs will also develop optimization software tools to maximize overall information return given the constraints of competing scientific objectives, the continually …
Collaborative Research: Late Quaternary History Of Reedy Glacier, Brenda Hall
Collaborative Research: Late Quaternary History Of Reedy Glacier, Brenda Hall
University of Maine Office of Research Administration: Grant Reports
The stability of the marine West Antarctic Ice Sheet (WAIS) remains an important, unresolved problem for predicting future sea level change. Recent studies indicate that the mass balance of the ice sheet today may be negative or positive. The apparent differences may stem in part from short-term fluctuations in flow. By comparison, geologic observations provide evidence of behavior over much longer time scales. Recent work involving glacial-geologic mapping, dating and ice-penetrating radar surveys suggests that deglaciation of both the Ross Sea Embayment and coastal Marie Byrd Land continued into the late Holocene, and leaves open the possibility of ongoing deglaciation …
Collaborative Research: Chronology Of Ice Fluctuations In The South Shetland Islands Since The Last Glacial Maximum, Brenda L. Hall
Collaborative Research: Chronology Of Ice Fluctuations In The South Shetland Islands Since The Last Glacial Maximum, Brenda L. Hall
University of Maine Office of Research Administration: Grant Reports
This award supports a study of the timing of climate changes in the Southern Hemisphere with the goal of reconstructing former ice extent and fluctuations, as well as paleoclimate, along the key latitudinal transect from temperate Tierra del Fuego to the polar Antarctic Peninsula. Samples already in hand will allow the dating of ice fluctuations in the South Shetland Islands (SSI), a critical location where that transect crosses the Antarctic Convergence. Surprisingly little concrete evidence exists concerning former ice extent in the island chain. The results of this study will answer a number of basic questions regarding ice extent and …
Globec Nep: Satellite-Observed Ocean Climate Variability, Andrew C. Thomas
Globec Nep: Satellite-Observed Ocean Climate Variability, Andrew C. Thomas
University of Maine Office of Research Administration: Grant Reports
The PIs will extend in time and expand in scope the satellite data development and satellite-based analyses of ocean climate variability in the Northeast Pacific (NEP), begun during the GLOBEC Pilot Project phase (1997 - 00). The overall scientific problem is to characterize and quantify the dominant modes of variability in the NEP as embodied by satellite measurements of surface transports, temperature and chlorophyll patterns. Our analyses address multiple spatial and temporal scales using merged satellite data products over GLOBEC target study regions in both the California Current (CCS) and the coastal Gulf of Alaska (CGOA).
GLOBEC NEP field studies …
The Lability Of Riverine Particulate Organic Carbon Delivered To The Ocean, Lawrence Mayer
The Lability Of Riverine Particulate Organic Carbon Delivered To The Ocean, Lawrence Mayer
University of Maine Office of Research Administration: Grant Reports
The large annual flux of organic carbon from land to the ocean largely disappears in the sea. Reasons for this loss are not clear. Under this award, the PI will examine abiotic and biotic aspects of the lability to loss of riverine particulate organic matter. Work will focus on the Mississippi, as it demonstrates the clearest loss of particulate organic material of any North American river upon deposition in the ocean. Photochemical experiments will follow up on initial work showing significant dissolution of particulate organic matter subjected to solar levels of radiation. Interactions with metal cycling will be studied, as …
Sger-Exploring The Use Of Quantum Dots To Detect The Physiology Of Intact Phytoplankton Cells By Flow Cytometry, Karen Orcutt
Sger-Exploring The Use Of Quantum Dots To Detect The Physiology Of Intact Phytoplankton Cells By Flow Cytometry, Karen Orcutt
University of Maine Office of Research Administration: Grant Reports
The PIs will to apply the emerging technology of Qdots in biological oceanography, particularly in studying phytoplankton. Qdots have unique fluorescence properties with tremendous potential for probing cell structure and function. They are inorganic fluorophores that can be conjugated to biological materials such as antibodies or DNA for use in cell detection. Molecular conjugates of Qdots offer a wide spectrum of applications such as multi-labeling of proteins and fluorescent in situ hybridization of DNA. The PIs will explore a new approach to an established research topic and venture into the emerging research area of nano-materials.
The novel approach may improve …
Ner: Exploratory Research On Developing A Nanoscale Sensing Device For Measuring The Supply Of Iron To Eukaryotic Phytoplankton In Natural Seawater, Mark L. Wells
University of Maine Office of Research Administration: Grant Reports
The long delay in recognizing the potentially key role of Fe in coastal marine systems has been in large part because of the complexity of microbial:Fe interactions in seawater. There still is no analytical method for determining biologically available Fe for either prokaryotic or eukaryotic phytoplankton. However, there is evidence that Fe availability to eukaryotic phytoplankton can be regulated by additions of the fungal siderophore desferrioxamine B (DFB) to coastal waters. The DFB-Fe complex not only is unavailable for uptake at significant rates, but also outcompetes the natural organic ligand classes in seawater for Fe. Measurement of DFB-Fe concentrations in …