Oceanography and Atmospheric Sciences and Meteorology Commons^™

Onset And Persistence Of Biogenic Meromixis In A Filling Pit Lake-A Limnological Perspective , Oscar Flite

All Dissertations

Open pit mining usually results in a void that, over time, fills with water and becomes a pit lake. The goal for pit lakes is to create sustainable systems that positively contribute to local and regional watersheds. One long-standing hypothesis for attaining the goal of sustainability has been to create and maintain meromictic lakes (lakes that do not completely mix on a yearly cycle). It is believed that meromixis minimizes atmospheric oxygen exposure to pit walls and concomitant acid generation and minimizes reentrainment of metals to the upper waters during seasonal mixes. This seems to be a reasonable goal but …

The Effect Of Water Droplet Oscillations On The Scavenging Efficiency Of Micron Sized Particles, Raymond Mcdonnell

All Theses

It has been hypothesized that drop oscillations and vortex shedding within the droplet wake affect the scavenging efficiency, E, of particles. However, no conclusive results have been presented on the effect these phenomena might have on particle scavenging. To address this need, experiments were conducted using oscillating water drops and water drops damped by the addition of glycerol. The scavenging efficiencies were measured for millimeter-sized droplets scavenging micron-sized particles. These results show that E is increased by drop oscillations where the particle diameter is large, but E is decreased by these oscillations when the particle diameter is small.

Fate Of Fish Production In A Seasonally Flooded Saltmarsh, Philip W. Stevens, Clay L. Montague, Kenneth J. Sulak

United States Geological Survey: Staff Publications

Although saltmarshes are thought to enhance the productivity of open estuarine water, the mechanism by which energy transfer occurs has been debated for decades. One possible mechanism is the transfer of saltmarsh production to estuarine waters by vagile fishes and invertebrates. Monthly estimates of fish standing stock, net fish ingress, and predation were used to develop a bio-mass budget to estimates annual production of fishes and the relative yield to predatory fish, birds, and direct migration to the estuary. Annual production of saltmarsh fishes was estimated to 31.0 gm^-2 saltmarsh, which falls within the range of previously reported values …

Evaluation Of Habitat Enhancement Structure Use By Spotted Bass, Stanley L. Proboszcz, Christopher S. Guy

The Prairie Naturalist

Habitat enhancement is a common and effective method used to positively influence fish populations. However, there is a paucity of speciesspecific evaluations of stream habitat enhancement structures for warmwater fishes. We evaluated use of half-log, rootwad enhancement structure, and simulated undercut bank (LUNKERS) by adult and juvenile spotted bass (Micropterus punctulatus) in natural and experimental streams. Enhancement structures were installed in Otter Creek, Kansas. Adult spotted bass use of natural and enhancement structure was documented weekly during summer and fall of 2001 and 2002 with radiotelemetry. Mean total length (TL) of adult fish was 292 mm (SE = …

Inside Unlv, Diane Russell, Cate Weeks, Shane Bevell, Mamie Peers, Lori Bachand

Inside UNLV

No abstract provided.

Lsuhsc Facilities Biweekly Update: December 2006, Lsuhsc Property And Facilities Management

LSUHSC Facilities Biweekly Updates: 2006

LSUHSC Facilities Biweekly Updates from December 8 and 22, 2006.

These updates describe damage and a timeline of repairs at the LSU Health Sciences Center - New Orleans campus due to Hurricane Katrina which made landfall August 29, 2005.

Lsuhsc Facilities Daily Update: December 2006, Lsuhsc Property And Facilities Management

LSUHSC Facilities Daily Updates: 2006

LSUHSC Dailly Facilities Updates from December 2006.

These updates describe damage and a timeline of repairs at the LSU Health Sciences Center - New Orleans campus due to Hurricane Katrina which made landfall August 29, 2005.

Law Of The Sea Cruise To Map The Western Insular Margin And 2500-M Isobath Of Guam And The Northern Mariana Islands. Cruise Report, James V. Gardner

Center for Coastal and Ocean Mapping

U.S. Law of the Sea cruise to map the western insular margin and 2500-m isobath of Guam and the Northern Mariana Islands

CRUISE BD06-1

October 13, to November 12, 2006

Naha, Okinawa, Japan to Apra Harbor, Guam

Acoustic Scattering From Mud Volcanoes And Carbonate Mounts, Charles W. Holland, Thomas C. Weber, Giuseppe Etiope

Center for Coastal and Ocean Mapping

Submarine mud volcanoes occur in many parts of the world’s oceans and form an aperture for gas and fluidized mud emission from within the earth’s crust. Their characteristics are of considerable interest to the geology, geophysics, geochemistry, and underwater acoustics communities. For the latter, mud volcanoes are of interest in part because they pose a potential source of clutter for active sonar. Close-range (single-interaction) scattering measurements from a mud volcano in the Straits of Sicily show scattering10–15dB above the background. Three hypotheses were examined concerning the scattering mechanism: (1) gas entrained in sediment at/near mud volcano, (2) gas bubbles and/or …

Detecting Compaction Disequilibrium With Anisotropy Of Magnetic Susceptibility, Kurt Schwehr, Lisa Tauxe, Neal Driscoll, Homa Lee

Center for Coastal and Ocean Mapping

In clay-rich sediment, microstructures and macrostructures influence how sediments deform when under stress. When lithology is fairly constant, anisotropy of magnetic susceptibility (AMS) can be a simple technique for measuring the relative consolidation state of sediment, which reflects the sediment burial history. AMS can reveal areas of high water content and apparent overconsolidation associated with unconformities where sediment overburden has been removed. Many other methods for testing consolidation and water content are destructive and invasive, whereas AMS provides a nondestructive means to focus on areas for additional geotechnical study. In zones where the magnetic minerals are undergoing diagenesis, AMS should …

Stratospheric Variability And Trends In Models Used For The Ipcc Ar4, P. M. De F. Forster, Eugene Cordero

Faculty Publications, Meteorology and Climate Science

Atmosphere and ocean general circulation model (AOGCM) experiments for the Intergovernmental Panel on Climate Change Fourth Assessment Report (AR4) are analyzed to better understand model variability and assess the importance of various forcing mechanisms on stratospheric trends during the 20th century. While models represent the climatology of the stratosphere reasonably well in comparison with NCEP reanalysis, there are biases and large variability among models. In general, AOGCMs are cooler than NCEP throughout the stratosphere, with the largest differences in the tropics. Around half the AOGCMs have a top level beneath ~2 hPa and show a significant cold bias in their …

Mercury Exchange Between The Atmosphere And Low Mercury Containing Substrates, Mae Sexauer Gustin, Mark Engle, Jody Ericksen, Seth N. Lyman, Jelena Stamenkovic, Mei Xin

USU Uintah Basin Faculty Publications

Mercury is emitted to the air from Hg-enriched and low Hg-containing (natural background) substrates. Emitted Hg can be geogenic, or can be derived from the re-emission of Hg that was previously deposited to the soil from the atmosphere. Atmospheric Hg can be derived from natural and/or anthropogenic sources and can be deposited by wet or dry processes. It is important to understand the relative magnitude of emission, deposition, and re-emission of Hg associated with terrestrial ecosystems with natural background soil Hg concentrations because these landscapes cover large terrestrial surface areas. This information is also important for developing biogeochemical mass balances, …

Validity, Identification, And Distribution Of The Roundscale Spearfish, Tetrapturus Georgii (Teleostei: Istiophoridae): Morphological And Molecular Evidence, Mahmood S. Shivji, Jennifer E. Magnussen, Lawrence R. Beerkircher, George Hinteregger, Dennis W. Lee, Joseph E. Serafy, Eric D. Prince

Marine & Environmental Sciences Faculty Articles

The roundscale spearfish, Tetrapturus georgii Lowe, 1840, is known only from four specimens from the Mediterranean and eastern North Atlantic. Additional specimens have not been identified since 1961, making the validity and distribution of this species unclear. Analysis of 16 billfish specimens from the western North Atlantic on the basis of scale morphology, anus position, and mitochondrial DNA confirms the validity of this species and extends its distribution. Mid-lateral scales are soft, notably rounded anteriorly, and bear 2–3 points distinct from those of the sympatric longbill spearfish (Tetrapturus pfluegeri Robins and de Sylva, 1963) and white marlin (Tetrapturus …

Climate Change And Adaptation In South West Western Australia, State Greenhouse Action Committee, Luke Morgan

Bulletins 4000 -

Phase One of Action 5.5, State Greenhouse Strateg.

A report to the Western Australian Government and Australian Greenhouse Office

Community, industry and government views on past and future climate change for South West Western Australia

Inside Unlv, Cate Weeks, Brenda Griego, David Ashley, Mamie Peers, Shane Bevell, Gian Galassi

Inside UNLV

No abstract provided.

Lsuhsc Facilities Biweekly Update: November 2006, Lsuhsc Property And Facilities Management

LSUHSC Facilities Biweekly Updates: 2006

LSUHSC Facilities Biweekly Updates from November 10 and 28, 2006.

These updates describe damage and a timeline of repairs at the LSU Health Sciences Center - New Orleans campus due to Hurricane Katrina which made landfall August 29, 2005.

Lsuhsc-New Orleans Dental School Campus: Timelines And Conditions That Impacted Recovery, Matt Gedge

LSUHSC Hurricane Katrina Archive: Reports & Presentations

"LSUHSC-New Orleans Dental School Campus: Timelines and Conditions That Impacted Recovery" is a 10-page document created by Matt Gedge (Director of Special Projects 1985-2020) on November 2, 2006.

This comprehensive and detailed report offers a bulleted timeline of damage and repairs (both completed and in progress) to the LSU Health Dental School - New Orleans campus from August 29, 2005 to November 2006. It also includes a timeline and generalized description of the immediate effect of Hurricane Katrina on the city, and the flood resulting from the failure of the federal levee system protecting Greater New Orleans.

Lsuhsc Facilities Daily Update: November 2006, Lsuhsc Property And Facilities Management

LSUHSC Facilities Daily Updates: 2006

LSUHSC Dailly Facilities Updates from November 2006.

These updates describe damage and a timeline of repairs at the LSU Health Sciences Center - New Orleans campus due to Hurricane Katrina which made landfall August 29, 2005.

Assessment Of Temperature, Trace Species, And Ozone In Chemistry-Climate Model Simulations Of The Recent Past, V. Eyring, N. Butchart, D. W. Waugh, H. Akiyoshi, J. Austin, S. Bekki, G. E. Bodeker, B. A. Boville, C. Brühl, M. P. Chipperfield, E. Cordero, M. Dameris, M. Deushi, V. E. Fioletov, S. M. Frith, R. R. Garcia, A. Gettelman, M. A. Giorgetta, V. Grewe, L. Jourdain, D. E. Kinnison, E. Mancini, E. Manzini, M. Marchand, D. R. Marsh, T. Nagashima, P. A. Newman, J. E. Nielsen, S. Pawson, G. Pitari, D. A. Plummer, E. Rozanov, M. Schraner, T. G. Shepherd, K. Shibata, R. S. Stolarski, H. Struthers, W. Tian, M. Yoshiki

Faculty Publications, Meteorology and Climate Science

[1] Simulations of the stratosphere from thirteen coupled chemistry-climate models (CCMs) are evaluated to provide guidance for the interpretation of ozone predictions made by the same CCMs. The focus of the evaluation is on how well the fields and processes that are important for determining the ozone distribution are represented in the simulations of the recent past. The core period of the evaluation is from 1980 to 1999 but long-term trends are compared for an extended period (1960–2004). Comparisons of polar high-latitude temperatures show that most CCMs have only small biases in the Northern Hemisphere in winter and spring, but …

A Process For Producing Ice Coverage Marine Information Objects (Mios) In Iho S-57 Format, George Dias, David F. Coleman, Ahmed El-Rabbany, Benson Agi, Lee Alexander

Center for Coastal and Ocean Mapping

While global warming may be opening up more Arctic waters in the summer, ice still infests key shipping lanes in the northern hemisphere during the winter months. To safely navigate these areas, mariners rely on daily ice coverage charts produced by national governmental agencies. Ice charts are primarily issued in paper format or as a fax. However, there is increased interest to ice coverage information on vessel navigation systems such as an Electronic Chart and Display Information Systems (ECDIS). However, to do so, the ice information must be provided as a separate layer of information to the Electronic Navigational Chart …

Exchange Hydrodynamics Between A Subestuary And Its Adjacent Estuary, Diego A. Narváez

OES Theses and Dissertations

Four oceanographic surveys and two periods of moored data were analyzed to describe the subtidal exchange hydrodynamics between a subestuary (Nansemond River) and its adjacent estuary (James River) in the lower Chesapeake Bay. The surveys were carried out during two semidiurnal periods (~25 hrs), which included two spring and two neap tides. Velocity profiles and hydrographic data were recorded over an area ~4 km long and ~1 km wide allowing a spatial resolution rarely obtained with observational data. The results obtained in the surveys were extended with instruments deployed at the entrance to the subestuary during winter and summer time …

Characterization Of Β-Lactam Resistant Pandemic Serotypes Of Vibrio Cholerae Isolated From Ships' Ballast Tanks And Coastal Waters, Amanda Lynn Goodrich

OES Theses and Dissertations

Vibrio cholerae serotypes 01 and 0139 are responsible for world-wide epidemics of cholera. These pandemic causing strains must possess genes that encode for the cholera toxin (CTX) and toxin co-regulated pili (TCP) in order to infect their hosts. In this study, 284 isolates of Vibrio cholerae from ballast and coastal waters were serotyped, with 11 % testing positive for serotype 01 and 21 % testing positive for serotype 0139. PCR assays were used to detect the presence of ctxA and tcpA genes in all positive isolates, none of which contained ctxA while 2% of the isolates contained tcpA. The 01 …

Fall 2006, Nsu Oceanographic Center

Currents

No abstract provided.

Lsuhsc Facilities Biweekly Update: October 2006, Lsuhsc Property And Facilities Management

LSUHSC Facilities Biweekly Updates: 2006

LSUHSC Facilities Biweekly Updates from October 17 and 27, 2006.

These updates describe damage and a timeline of repairs at the LSU Health Sciences Center - New Orleans campus due to Hurricane Katrina which made landfall August 29, 2005.

Lsuhsc Facilities Daily Update: October 2006, Lsuhsc Property And Facilities Management

LSUHSC Facilities Daily Updates: 2006

LSUHSC Dailly Facilities Updates from October 2006.

These updates describe damage and a timeline of repairs at the LSU Health Sciences Center - New Orleans campus due to Hurricane Katrina which made landfall August 29, 2005.

Changing Course: Katrina, Lsuhsc-No Library, And New Orleans, Jennifer K. Lloyd Mlis, Ahip

LSUHSC Hurricane Katrina Archive: Reports & Presentations

"Changing Course: Katrina, LSUHSC-NO Library, and New Orleans" is a PowerPoint presentation of 35 slides created and presented by Jennifer K. Lloyd (LSU Health - New Orleans librarian 1995-Present) to the South Central Chapter of the Medical Librarian Association Annual Conference held October 20-24, 2006 in College Station, TX.

This presentation includes timelines, staffing details and locations, and collection inventories relating to the closure, relocation, and reopening of the libraries serving LSU Health Sciences Center's two campuses that were impacted by Hurricane Katrina.

Oregon Ballast Water Task Force Report On Ballast Water Management In Oregon, Christina Simkanin, Mark Sytsma

Center for Lakes and Reservoirs Publications and Presentations

This report provides information and analysis on the current ballast water regulations at international, federal, regional and state levels; ballast water discharge trends in Oregon; the shipping industry’s compliance with Oregon law; and current and emerging issues affecting Oregon’s ballast water legislation. The report also provides recommendations for strengthening Oregon’s management of shipping-related pathways of invasive species introduction.

Morphological And Phylogenetic Description Of An Unusual Amphidinium (Dinophyceae) Species, Tyler Cyronak, Isaac R. Santos

Marine & Environmental Sciences Faculty Proceedings, Presentations, Speeches, Lectures

Amphidinium carterae, an important harmful algal species that produces powerful antifungal and hemolytic compounds (amphidinols) and cytotoxic macrolides (amphidinolides) is ubiquitous in coastal waters. Samples from coral rubble contained an unusual and previously unreported Amphidinium (D2) with a circular outline. Genetic analysis of clone D2 of this species, involving the sequencing of large subunit (LSU) rDNA, revealed a relationship between Amphidinium sp. D2 and both A. carterae and A. massartii. However, morphological and genetic differences suggest that Amphidinium sp. D2 is not conspecific with A. carterae or A. massartii. Further studies to describe this species are presently …

Documenting Decadal Spatial Changes In Seagrass And Acropora Palmata Cover By Aerial Photography Analysis In Vieques, Puerto Rico: 1937-2000, Luz Raquel Hernandez-Cruz, Samuel J. Purkis, Bernhard Riegl

Marine & Environmental Sciences Faculty Articles

Aerial photographs from 1937–2000 of Bahía Salina del Sur on vieques, Puerto Rico were analyzed to detect and describe spatial changes in the areal cover of sea-grass beds in Bahía Salina del Sur. The images were pre-processed to minimize noise and unsupervised classification was used to detect areas colonized by seagrass. The number of individual seagrass patches, direction, and characteristic of growth were quantified and described. Seagrass coverage increased by 85.8% over the 64-yr period and this increase was best described by a 2nd order polynomial function (r² = 0.91). Between 1937 and 2000, the spatial expression of the …

Optical Image Blending For Underwater Mosaics, Fan Gu, Yuri Rzhanov

Center for Coastal and Ocean Mapping

Typical problems for creation of consistent underwater mosaic are misalignment and inhomogeneous illumination of the image frames, which causes visible seams and consequently complicates post-processing of the mosaics such as object recognition and shape extraction. Two recently developed image blending methods were explored in the literature: "gradient domain stitching" and "graph-cut" method, and they allow for improvement of illumination inconsistency and "ghosting" effects, respectively. However, due to the specifics of underwater imagery, these two methods cannot be used within a straightforward manner. In this paper, a new improved blending algorithm is proposed based on these two methods. By comparing with …