Mixing By Shear Instability At High Reynolds Number,
2010
Old Dominion University
Mixing By Shear Instability At High Reynolds Number, W. R. Geyer, A. C. Lavery, M. E. Scully, J. H. Trowbridge
CCPO Publications
Shear instability is the dominant mechanism for converting fluid motion to mixing in the stratified ocean and atmosphere. The transition to turbulence has been well characterized in laboratory settings and numerical simulations at moderate Reynolds number-it involves "rolling up", i.e., overturning of the density structure within the cores of the instabilities. In contrast, measurements in an energetic estuarine shear zone reveal that the mixing induced by shear instability at high Reynolds number does not primarily occur by overturning in the cores; rather it results from secondary shear instabilities within the zones of intensified shear separating the cores. This regime ...
Paleo-Environmental Changes In The Uvs Nuur Basin (Northwest-Mongolia),
2010
National University of Mongolia
Paleo-Environmental Changes In The Uvs Nuur Basin (Northwest-Mongolia), Michael Walther
Erforschung biologischer Ressourcen der Mongolei / Exploration into the Biological Resources of Mongolia, ISSN 0440-1298
Geomorphological, geochemical, sedimentological and palynological results are presented against the background of palaeoclimatic changes during the past 15,000 years, yielding a chrono-, bio- and morphostratigraphical model of landscape evolution in the region of northern Central Asia. Holocene and Late-Glacial climatic fluctuations there are shown to correlate well with conditions in central Europe. Particular attention is given to the importance of the palaeoclimatic interpretation of lake Basin sediments when reconstructing the palaeoenvironment.
Development In The Gulf Of Maine: Avoiding Geohazards And Embracing Opportunities,
2010
University of Maine
Development In The Gulf Of Maine: Avoiding Geohazards And Embracing Opportunities, Laura L. Brothers, Joseph T. Kelley, Melissa Landon Maynard, Daniel F. Belknap, Stephen M. Dickson
Maine Policy Review
Mapping for marine-spatial planning is crucial if Maine is to safely develop its offshore resources, especially wind and tidal energy. The authors focus on shallow natural gas (methane) deposits, an important and widespread geohazard in Maine’s seafloor. They describe the origin, occurrence, and identification of natural gas in Maine’s seafloor; explain the hazards associated with these deposits and how to map them; and discuss what Maine can learn from European nations that have already developed their offshore wind resources. Because the U.S. gives states a central role in coastal management, Maine has the chance to ...
Evidence For Recent Population Bottlenecks In Northern Spotted
Owls (Strix Occidentalis Caurina),
2010
Colorado State University - Fort Collins
Evidence For Recent Population Bottlenecks In Northern Spotted Owls (Strix Occidentalis Caurina), W. Chris Funk, Eric D. Forsman, Matthew Johnson, Thomas D. Mullins, Susan M. Haig
USGS Staff -- Published Research
The northern spotted owl (Strix occidentalis caurina) is one of the most controversial threatened subspecies ever listed under the US Endangered Species Act. Despite protection of its remaining forest habitat, recent field studies show continued declines of northern spotted owls. One potential threat to northern spotted owls which has not yet been shown is loss of genetic variation from population bottlenecks. Bottlenecks can increase the probability of mating among related individuals, potentially causing inbreeding depression, and can decrease adaptive potential. Here we report evidence for recent bottlenecks in northern spotted owls using a large genetic dataset (352 individuals and 10 ...
2010 Hampton Roads Station Tide Prediction Calendars,
2010
Virginia Institute of Marine Science
2010 Hampton Roads Station Tide Prediction Calendars, Virginia Institute Of Marine Science, David A. Evans
Miscellaneous
These calendars are produced monthly using David Evans' Tidecal.
Calibration Of The Umass Advanced Multi-Frequency Radar,
2010
University of Massachusetts Amherst
Calibration Of The Umass Advanced Multi-Frequency Radar, Matthew Mclinden
Masters Theses 1911 - February 2014
The Advanced Multi-Frequency Radar is a three-frequency system designed and built by the University of Massachusetts Microwave Remote Sensing Lab (MIRSL). The radar has three frequencies, Ku-band (13.4 GHz), Ka-band (35.6 GHz), and W-band (94.92GHz). The additional information gained from additional frequencies allows the system to be sensitive to a wide range of atmospheric and precipitation particle sizes, while increasing the ability to derive particle microphysics from radar retrievals.
This thesis details the calibration of data from the Canadian CloudSat/CALIPSO Validation Project (C3VP) held during January 2007 in Ontario, Canada. The calibration used internal calibration path ...
Developing Performance Indicators To Evaluate The Management Effectiveness Of The Massachusetts Ocean Management Plan,
2010
University of Massachusetts Boston
Developing Performance Indicators To Evaluate The Management Effectiveness Of The Massachusetts Ocean Management Plan, Jack Wiggin, Dan Hellin, Kristin Uiterwyk, Robert E. Bowen, Prassede Vella, John Weber, Stephanie Moura, Nicholas Napoli, Kim Starbuck, Howard Krum
Urban Harbors Institute Publications
In June 2009, the Massachusetts Executive Office of Energy and Environmental Affairs (EEA) released its draft Massachusetts Ocean Management Plan (draft plan) for public comment. The plan is required by the Oceans Act of 2008 to, among other things, be adaptive to evolving knowledge and understanding of the ocean environment. The plan’s Science Framework establishes a blueprint for future research and data acquisition and ensuring that the plan evolves and its management measures adapt to this new and enhanced information. As stated in Chapter 5 of the draft plan, an important part of the science framework is the development ...
2010 Gloucester Point Station Tide Prediction Calendars,
2010
Virginia Institute of Marine Science
2010 Gloucester Point Station Tide Prediction Calendars, Virginia Institute Of Marine Science, David A. Evans
Miscellaneous
These calendars are produced monthly using David Evans' Tidecal.
Oceanography Center Course Catalog 2010-2011,
2010
Nova Southeastern University
Oceanography Center Course Catalog 2010-2011, Nova Southeastern University
Halmos College of Natural Sciences and Oceanography Course Catalogs
No abstract provided.
Consistency Of Projected Drought Over The Sahel With Changes In The Monsoon Circulation And Extremes In A Regional Climate Model Projections,
2010
Cheikh Anta Diop University
Consistency Of Projected Drought Over The Sahel With Changes In The Monsoon Circulation And Extremes In A Regional Climate Model Projections, M. B. Sylla, A. T. Gaye, G. S. Jenkins, Jeremy S. Pal, F. Giorgi
Environmental Science & Civil Engineering Faculty Works
As a step toward an increased understanding of climate change over West Africa, in this paper we analyze the relationship between rainfall changes and monsoon dynamics in high-resolution regional climate model experiments performed using the Regional Climate Model (RegCM3). Multidecadal simulations are carried out for present-day and future climate conditions under increased greenhouse gas forcing driven by the global climate model European Center/Hamburg 5 (ECHAM5). Compared to the present day, the future scenario simulation produces drier conditions over the Sahel and wetter conditions over orographic areas. The Sahel drying is accompanied by a weaker monsoon flow, a southward migration ...
Tributary Contribution To The Spring River, Ar As Determined By Water Quality Analyses,
2010
Arkansas State University
Tributary Contribution To The Spring River, Ar As Determined By Water Quality Analyses, T. R. Brueggen, C. B. Dowling, Jennifer L. Bouldin
Journal of the Arkansas Academy of Science
Tributaries often play an important role in the chemical properties, productivity and species diversity in a river channel. The objective of this study was to analyze the effect of tributaries on the water quality of the Spring River, AR. The Spring River has an approximate length of 92 km and has been divided into four zones according to the water source(s) that feed that segment of river. In this study approximately 30 km of the upstream river segment were sampled, which included nine tributaries contributing to the main river channel and incorporated the upper three previously defined zones. Samples ...
Graduate Certificates In Coastal Studies And Marine And Coastal Climate Change,
2010
Nova Southeastern University
Graduate Certificates In Coastal Studies And Marine And Coastal Climate Change, Nova Southeastern University
Halmos College of Natural Sciences and Oceanography Course Catalogs
No abstract provided.
Fall 2010,
2010
Nova Southeastern University
Winter 2010,
2010
Nova Southeastern University
Seasonal And Salinity Effects On The Distribution Of Higher Filamentous Marine Fungi At Rookery Bay, Fl.,
2010
Nova Southeastern University
Seasonal And Salinity Effects On The Distribution Of Higher Filamentous Marine Fungi At Rookery Bay, Fl., Julia Ossler
HCNSO Student Theses and Dissertations
More than 500 species of higher marine fungi in over 300 genera have been described. Many marine fungi are highly specialized for marine environments relative to their terrestrial counterparts, having appendaged ascospores and conidia to aid in buoyancy, entrapment, and adherence to substrates. They have been reported to inhabit a wide variety of substrates including decaying wood, leaves, calcareous and chitinous substrates, seaweeds, and seagrasses. Most early studies on marine fungi were carried out in temperate regions. Investigations have now shifted to tropical locations in order to better evaluate the abundance and diversity of marine fungi on a global basis ...
Development And Application Of A
Pollen-Based Paleohydrologic
Reconstruction From The Lower Roanoke River Basin, North Carolina, Usa,
2010
US Geological Survey
Development And Application Of A Pollen-Based Paleohydrologic Reconstruction From The Lower Roanoke River Basin, North Carolina, Usa, Debra Willard, Christopher Bernhardt, Roger Brown, Bryan Landacre, Philip A. Townsend
USGS Staff -- Published Research
We used pollen assemblages to reconstruct late-Holocene paleohydrologic patterns in floodplain deposits from the lower Roanoke River basin (North Carolina, southeastern USA). Using 120 surface samples from 38 transects, we documented statistical relationships between pollen assemblages, vegetation, and landforms. Backswamp pollen assemblages (long hydroperiods) are dominated by Nyssa (tupelo) and Taxodium (cypress) and have high pollen concentrations. Sediments from elevated levees and seasonally flooded forests (shorter hydroperiods) are characterized by dominant Pinus (pine) pollen, variable abundance of hardwood taxa, and low pollen concentrations. We apply the calibration data set to interpret past vegetation and paleohydrology. Pollen from a radiocarbon-dated sediment ...
Marine Benthic Habitat Mapping Of Muir Inlet, Glacier Bay National Park And Preserve, Alaska With An Evaluation Of The Coastal And Marine Ecological Classification Standard Iii,
2010
Northern Illinois University
Marine Benthic Habitat Mapping Of Muir Inlet, Glacier Bay National Park And Preserve, Alaska With An Evaluation Of The Coastal And Marine Ecological Classification Standard Iii, Luke D. Mitchell, Guy R. Cochrane, Lisa Etherington, Ross D. Powell, Larry A. Mayer
Center for Coastal and Ocean Mapping
Seafloor geology and potential benthic habitats were mapped in Muir Inlet, Glacier Bay National Park and Preserve, Alaska, using multibeam sonar, ground-truth information, and geological interpretations. Muir Inlet is a recently deglaciated fjord that is under the influence of glacial and paraglacial marine processes. High glacially derived sediment and meltwater fluxes, slope instabilities, and variable bathymetry result in a highly dynamic estuarine environment and benthic ecosystem. We characterize the fjord seafloor and potential benthic habitats using the Coastal and Marine Ecological Classification Standard (CMECS) recently developed by the National Oceanic and Atmospheric Administration (NOAA) and NatureServe. Substrates within Muir Inlet ...
Blue Carbon: The Role Of Healthy Oceans In Binding Carbon,
2010
UNEP/GRID-Arendal, Norway
Blue Carbon: The Role Of Healthy Oceans In Binding Carbon, Christian Nellemann, Emily Corcoran, Carlos M. Duarte, Cassandra De Young, Luciano E. Fonseca, Gabriel Grimsdith
Center for Coastal and Ocean Mapping
No abstract provided.
The Impact Of Hydrological And Climatic Variations On The Oxygen-18 Content Of Atmospheric Co2,
2010
University of Colorado, Boulder
The Impact Of Hydrological And Climatic Variations On The Oxygen-18 Content Of Atmospheric Co2, Nikolaus Howard Buenning
Atmospheric & Oceanic Sciences Graduate Theses & Dissertations
The 18O composition of atmospheric CO2 is a potentially valuable tracer of global interactions between the hydrologic and carbon cycles. The observed 18O composition of atmospheric CO2 (hereafter ∂Ca, where d =(R/Rstandard-1) ~ 1000 and R is the molar ratio of heavy to light isotopes) does not show a clear long-term trend, though almost all monitoring stations observed an impressive decrease in ∂Ca from 1992 to 1998. The cause(s) of this and other interannual ∂Ca variations are still relatively unknown, and this work aims to better understand the driving mechanisms that caused the observed interannual ∂Ca variations.
Observed ...
Combined Effects Of Heat Waves And Droughts On Avian Communities Across The Conterminous United States,
2010
University of Wisconsin-Madison
Combined Effects Of Heat Waves And Droughts On Avian Communities Across The Conterminous United States, Thomas P. Albright, Anna M. Pidgeon, Chadwick D. Rittenhouse, Murray K. Clayton, Brian D. Wardlow, Curtis H. Flather, Patrick D. Culbert, Volker C. Radeloff
Drought Mitigation Center Faculty Publications
Increasing surface temperatures and climatic variability associated with global climate change are expected to produce more frequent and intense heat waves and droughts in many parts of the world. Our goal was to elucidate the fundamental, but poorly understood, effects of these extreme weather events on avian communities across the conterminous United States. Specifically, we explored: (1) the effects of timing and duration of heat and drought events, (2) the effects of jointly occurring drought and heat waves relative to these events occurring in isolation, and (3) how effects vary among functional groups related to nest location and migratory habit ...
