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Articles 1 - 22 of 22
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An Optical Model For Heat And Salt Budget Estimation For Shallow Seas, Hari Warrior, Kendall L. Carder
An Optical Model For Heat And Salt Budget Estimation For Shallow Seas, Hari Warrior, Kendall L. Carder
Marine Science Faculty Publications
The effects of the underwater light field on heat-budget calculations for shallow waters are developed and applied for the region of Bahamas. Most of the general circulation models use a simplified heat budget scheme based on Jerlov water types, and do not account for optical bottom effects. by optical bottom effect, we mean the bottom absorption and reflection of the short-wave radiation, which in turn affects the thermal stratification and heat exchange with the atmosphere. In this paper, this optical bottom effect is added to a 3D turbulence model (a 1D model called GOTM is coupled to a 3D model …
A High Resolution Satellite-Only Grace-Based Mean Dynamic Topography Of The South Atlantic Ocean, Marcio L. Vianna, Viviane V. Menezes, D. Chambers
A High Resolution Satellite-Only Grace-Based Mean Dynamic Topography Of The South Atlantic Ocean, Marcio L. Vianna, Viviane V. Menezes, D. Chambers
Marine Science Faculty Publications
A new filtering method based on Singular Spectrum Analysis has been devised to extract high resolution (0.25° × 0.25° grid) satellite-only Mean Dynamic Ocean Topography(MDT) constructed by differencing of the GGM02 GRACE Gravity Model from the GSFCMSS00 Mean Sea Surface. This data-adaptive interpolation-type filter is adequate for the finite domain MDT processing since it minimizes smoothing and does not lose boundary points. It is applied to the computation of two new MDTs and MDT-derived mean geostrophic circulation maps of the South Atlantic region from 15°N to 50°S. Advantages of these new maps are clarified when contrasted with the Rio-2005, Chambers-Zlotnicki-2004 …
Reconstructing Twentieth-Century Sea Surface Temperature Variability In The Southwest Pacific: A Replication Study Using Multiple Coral Sr/Ca Records From New Caledonia, Kristine L. Delong, Terrence M. Quinn, Frederick W. Taylor
Reconstructing Twentieth-Century Sea Surface Temperature Variability In The Southwest Pacific: A Replication Study Using Multiple Coral Sr/Ca Records From New Caledonia, Kristine L. Delong, Terrence M. Quinn, Frederick W. Taylor
Marine Science Faculty Publications
Coral‐based climate reconstructions typically have not used multiple cores from a region to capture and replicate a climate signal largely because of concerns of coral conservation, analytical expense, and time constraints. Coral Sr/Ca reproducibility through the twentieth century was investigated using three intracolony and three intercolony coral records from the reefs offshore of Amédée Island, New Caledonia. Different sampling resolutions were examined in coral Sr/Ca (fortnightly and monthly) and δ18O (fortnightly, monthly, and seasonally) as well as similar scale subsampling of the daily in situ sea surface temperature (SST) record. The mean coral Sr/Ca, δ18O, and …
Evidence Of Compromised Blood-Spinal Cord Barrier In Early And Late Symptomatic Sod1 Mice Modeling Als, Svitlana N. Garbuzova-Davis, Samuel Saporta, Edward M. Haller, Irina Kolomey, Steven P. Bennett, Huntington Potter, Paul R. Sanberg
Evidence Of Compromised Blood-Spinal Cord Barrier In Early And Late Symptomatic Sod1 Mice Modeling Als, Svitlana N. Garbuzova-Davis, Samuel Saporta, Edward M. Haller, Irina Kolomey, Steven P. Bennett, Huntington Potter, Paul R. Sanberg
Integrative Biology Faculty and Staff Publications
Background: The blood-brain barrier (BBB), blood-spinal cord barrier (BSCB), and blood-cerebrospinal fluid barrier (BCSFB) control cerebral/spinal cord homeostasis by selective transport of molecules and cells from the systemic compartment. In the spinal cord and brain of both ALS patients and animal models, infiltration of T-cell lymphocytes, monocyte-derived macrophages and dendritic cells, and IgG deposits have been observed that may have a critical role in motor neuron damage. Additionally, increased levels of albumin and IgG have been found in the cerebrospinal fluid in ALS patients. These findings suggest altered barrier permeability in ALS. Recently, we showed disruption of the BBB and …
An Evaluation Of Movement Patterns And Effects Of Habitat Patch Size On The Demography Of The Florida Mouse (Podomys Floridanus), Irmgard Lukanik
An Evaluation Of Movement Patterns And Effects Of Habitat Patch Size On The Demography Of The Florida Mouse (Podomys Floridanus), Irmgard Lukanik
USF Tampa Graduate Theses and Dissertations
Habitat degradation by humans has been the main reason for the decline in numbers of P. floridanus, the only mammal indigenous to the state of Florida, in the past century. The mouse inhabits what remains of scrub and sandhill associations, which are characterized by patches of sandy soils within a more mesic landscape. It has long been accepted that small populations are more prone to decline and extinction than are larger ones as a result of environmental fluctuations. I hypothesized that the demography of a population of P. floridanus would be affected by a restriction in numbers through habitat …
Upper Ocean Response Of The Mesoamerican Barrier Reef System To Hurricane Mitch And Coastal Freshwater Inputs: A Study Using Sea-Viewing Wide Field-Of-View Sensor (Seawifs) Ocean Color Data And A Nested-Grid Ocean Circulation Model, Jinyu Sheng, Liang Wang, Serge Andrefouet, Chuanmin Hu, Bruce G. Hatcher, Frank E. Muller-Karger, Bjoern Kjerfve, William D. Heyman, Bo Yang
Upper Ocean Response Of The Mesoamerican Barrier Reef System To Hurricane Mitch And Coastal Freshwater Inputs: A Study Using Sea-Viewing Wide Field-Of-View Sensor (Seawifs) Ocean Color Data And A Nested-Grid Ocean Circulation Model, Jinyu Sheng, Liang Wang, Serge Andrefouet, Chuanmin Hu, Bruce G. Hatcher, Frank E. Muller-Karger, Bjoern Kjerfve, William D. Heyman, Bo Yang
Marine Science Faculty Publications
The passage of category‐5 Hurricane Mitch through the Mesoamerican Barrier Reef System (MBRS) in October 1998 was an extreme event with the potential to create unusual patterns of reef connectivity. The impact of this hurricane on the upper ocean of the MBRS is investigated using a triply nested grid ocean circulation modeling system. The model results are validated with contemporaneous ocean color data from the Sea‐viewing Wide Field‐of‐view Sensor (SeaWiFS) satellite and oceanographic measurements in the MBRS. The nested grid system is forced by 6‐hourly National Centers for Environmental Prediction/National Center for Atmospheric Research (NCEP/NCAR) winds for the first 294 …
Ocean Currents And Sea Surface Heights Estimated Across The West Florida Shelf, Yonggang Liu, Robert H. Weisberg
Ocean Currents And Sea Surface Heights Estimated Across The West Florida Shelf, Yonggang Liu, Robert H. Weisberg
Marine Science Faculty Publications
The across-shelf structures of the ocean circulation and the associated sea surface height (SSH) variability are examined on the west Florida shelf (WFS) for the 3-yr interval from September 1998 to December 2001. Five sets of characteristic circulation patterns are extracted from 2-day, low-pass-filtered data using the self-organizing map: extreme upwelling and downwelling structures with strong currents, asymmetric upwelling and downwelling structures with moderate currents, and a set of transitional structures with weak currents. The temporal variations of these structures are coherent with the local winds on synoptic weather time scales. On seasonal time scales they are related to both …
Bathymetric Alterations Due To Urbanization And Their Effects On Residual Salinity, Flow Field And Transport Time For Tampa Bay, Florida, Amanda J. Linville
Bathymetric Alterations Due To Urbanization And Their Effects On Residual Salinity, Flow Field And Transport Time For Tampa Bay, Florida, Amanda J. Linville
USF Tampa Graduate Theses and Dissertations
Growth and development over the past one hundred years has resulted in the construction of causeways and navigational channels in Tampa Bay. Urbanization has lead to bathymetric alterations of the bay, and thus has effectively changed the residual salinity, flow fields, and transport time in Tampa Bay. In this study a numerical ocean model of Tampa Bay was first used to simulate the circulation for 2001-2003 using present day bathymetry. Then, an identical simulation was performed using the bathymetry generated from 1879 depth soundings. The residual (30-day time average) circulation fields and salinity, along with transport times was intercompared for …
Particulate Organic Carbon Fluxes Along Upwelling-Dominated Continental Margins: Rates And Mechanisms, Robert C. Thunell, Claudia Benitez-Nelson, Ramon Varela, Yrene Astor, Frank E. Muller-Karger
Particulate Organic Carbon Fluxes Along Upwelling-Dominated Continental Margins: Rates And Mechanisms, Robert C. Thunell, Claudia Benitez-Nelson, Ramon Varela, Yrene Astor, Frank E. Muller-Karger
Marine Science Faculty Publications
Time series sediment trap samples were used to examine the rates and mechanisms of particulate organic carbon (POC) flux at three continental margin locations, Santa Barbara Basin, Cariaco Basin, and Guaymas Basin, marked by seasonal upwelling and high primary production. The mean POC flux in Santa Barbara Basin (0.096 g m−2 d−1) is nearly twice that of Cariaco Basin and 4 times higher than that in Guaymas Basin, with all three sites having POC fluxes significantly higher than the open ocean average (0.007 g m−2 d−1). In Cariaco Basin, the only site with available …
Community Composition Of Crustaceans And Gastropods On Caulerpa Prolifera, Halodule Wrightii And Thalassia Testudinum, Jennifer A. Gibson
Community Composition Of Crustaceans And Gastropods On Caulerpa Prolifera, Halodule Wrightii And Thalassia Testudinum, Jennifer A. Gibson
USF Tampa Graduate Theses and Dissertations
No abstract provided.
Euphotic Zone Depth: Its Derivation And Implication To Ocean-Color Remote Sensing, Zhongping Lee, Alan Weidemann, John Kindle, Robert Arnone, Kendall L. Carder, Curtiss Davis
Euphotic Zone Depth: Its Derivation And Implication To Ocean-Color Remote Sensing, Zhongping Lee, Alan Weidemann, John Kindle, Robert Arnone, Kendall L. Carder, Curtiss Davis
Marine Science Faculty Publications
Euphotic zone depth, z1%, reflects the depth where photosynthetic available radiation (PAR) is 1% of its surface value. The value of z1% is a measure of water clarity, which is an important parameter regarding ecosystems. Based on the Case‐1 water assumption, z1% can be estimated empirically from the remotely derived concentration of chlorophyll‐a ([Chl]), commonly retrieved by employing band ratios of remote sensing reflectance (Rrs). Recently, a model based on water's inherent optical properties (IOPs) has been developed to describe the vertical attenuation of visible solar radiation. Since IOPs can be near‐analytically calculated …
Multivariate Reconstruction Of Missing Data In Sea Surface Temperature, Chlorophyll, And Wind Satellite Fields, Aida Alvera-Azcarate, Alexander Barth, J. M. Beckers, Robert H. Weisberg
Multivariate Reconstruction Of Missing Data In Sea Surface Temperature, Chlorophyll, And Wind Satellite Fields, Aida Alvera-Azcarate, Alexander Barth, J. M. Beckers, Robert H. Weisberg
Marine Science Faculty Publications
An empirical orthogonal function–based technique called Data Interpolating Empirical Orthogonal Functions (DINEOF) is used in a multivariate approach to reconstruct missing data. Sea surface temperature (SST), chlorophyll a concentration, and QuikSCAT winds are used to assess the benefit of a multivariate reconstruction. In particular, the combination of SST plus chlorophyll, SST plus lagged SST plus chlorophyll, and SST plus lagged winds have been studied. To assess the quality of the reconstructions, the reconstructed SST and winds have been compared to in situ data. The combination of SST plus chlorophyll, as well as SST plus lagged SST plus chlorophyll, significantly improves …
Developing Standards For Dissolved Iron In Seawater, Kenneth Johnson, Virginia Elrod, Steve Fitzwater, Joshua Plant, Edward Boyle, Bridget Bergquist, Kristen N. Buck
Developing Standards For Dissolved Iron In Seawater, Kenneth Johnson, Virginia Elrod, Steve Fitzwater, Joshua Plant, Edward Boyle, Bridget Bergquist, Kristen N. Buck
Marine Science Faculty Publications
In nearly a dozen open‐ocean fertilization experiments conducted by more than 100 researchers from nearly 20 countries, adding iron at the sea surface has led to distinct increases in photosynthesis rates and biomass. These experiments confirmed the hypothesis proposed by the late John Martin [Martin, 1990] that dissolved iron concentration is a key variable that controls phytoplankton processes in ocean surface waters However, the measurement of dissolved iron concentration in seawater remains a difficult task [Bruland and Rue, 2001] with significant interlaboratory differences apparent at times. The availability of a seawater reference solution with well‐known dissolved …
Effects Of Ice Melting On Grace Observations Of Ocean Mass Trends, Don P. Chambers, Mark E. Tamisiea, R Steven Nerem, John C. Ries
Effects Of Ice Melting On Grace Observations Of Ocean Mass Trends, Don P. Chambers, Mark E. Tamisiea, R Steven Nerem, John C. Ries
Marine Science Faculty Publications
The Gravity Recovery and Climate Experiment (GRACE) was designed to measure variations in the Earth's gravity field from space at monthly intervals. Researchers have used these data to measure changes in water mass over various regions, including the global oceans and continental ice sheets covering Greenland and Antarctica. However, GRACE data must be smoothed in these analyses and the effects of geocenter motions are not included. In this study, we examine what effect each of these has in the computation of ocean mass trends using a simulation of ice melting on Greenland, Antarctica, and mountain glaciers. We find that the …
Satellite-Derived Surface Current Divergence In Relation To Tropical Atlantic Sst And Wind, Robert W. Helber, Robert H. Weisberg, Fabrice Bonjean, Eric S. Johnson, Gary S. Lagerloef
Satellite-Derived Surface Current Divergence In Relation To Tropical Atlantic Sst And Wind, Robert W. Helber, Robert H. Weisberg, Fabrice Bonjean, Eric S. Johnson, Gary S. Lagerloef
Marine Science Faculty Publications
The relationships between tropical Atlantic Ocean surface currents and horizontal (mass) divergence, sea surface temperature (SST), and winds on monthly-to-annual time scales are described for the time period from 1993 through 2003. Surface horizontal mass divergence (upwelling) is calculated using surface currents estimated from satellite sea surface height, surface vector wind, and SST data with a quasi-linear, steady-state model. Geostrophic and Ekman dynamical contributions are considered. The satellite-derived surface currents match climatological drifter and ship-drift currents well, and divergence patterns are consistent with the annual north–south movement of the intertropical convergence zone (ITCZ) and equatorial cold tongue evolution. While the …
Progressive Dolomitization Of Florida Limestone Recorded By Alkaline Earth Element Concentrations In Saline, Geothermal, Submarine Springs, Johan Schijf, Robert H. Byrne
Progressive Dolomitization Of Florida Limestone Recorded By Alkaline Earth Element Concentrations In Saline, Geothermal, Submarine Springs, Johan Schijf, Robert H. Byrne
Marine Science Faculty Publications
Studies in the late 1970s revealed that the effluents of saline, geothermal, submarine springs on the West Florida Shelf have compositions nearly identical to seawater, except for distinct Ca enrichments and Mg depletions, probably resulting from dolomitization. During annual visits between 1996 and 2003 we collected high‐purity effluents from four submarine springs and from Warm Mineral Springs (WMS), which is located on land. Filtered effluents were analyzed for major ions and for Sr and Ba. These analyses confirm the seawater‐like composition of the effluents as well as the Ca enrichment and Mg depletion. The alkaline earth elements Sr and Ba, …
Ontogenetic Change In Novel Functions: Waterfall Climbing In Adult Hawaiian Gobiid Fishes, R Blob, K M. Wright, M Becker, T Maie, T J. Iverson, M L. Julius, H L. Schoenfuss
Ontogenetic Change In Novel Functions: Waterfall Climbing In Adult Hawaiian Gobiid Fishes, R Blob, K M. Wright, M Becker, T Maie, T J. Iverson, M L. Julius, H L. Schoenfuss
Academic Services Faculty and Staff Publications
Juveniles from three species of Hawaiian gobiid fishes climb waterfalls as part of an amphidromous life cycle, allowing them to re-penetrate adult upstream habitats after being swept out to the ocean upon hatching. The importance of climbing for juvenile stream gobies is well established, but adult fish in upstream island habitats also face potential downstream displacement by periodic disturbances. Thus, retention of climbing ability could be advantageous for adult stream gobies. Climbing performance might be expected to decline among adults, however, due to the tendency for mass-specific muscular power production to decrease with body size, and a lack of positively …
Comment On “Modern-Age Buildup Of Co2 And Its Effects On Seawater Acidity And Salinity” By Hugo A. Loáiciga, Ken Caldeira, David Archer, James P. Barry, Richard G. Bellerby, Peter G. Brewer, Long Cao, Andrew G. Dickson, Scott C. Doney, Harry Elderfield, Victoria J. Fabry, Richard A. Feely, Jean-Pierre Gattuso, Peter M. Haugan, Ove Hoegh-Guldberg, Atul K. Jain, Joan A. Kleypas, Chris Langdon, James C. Orr, Andy Ridgwell, Christopher L. Sabine, Brad A. Seibel, Yoshihisa Shirayama, Carol Turley, Andrew J. Watson, Richard E. Zeebe
Comment On “Modern-Age Buildup Of Co2 And Its Effects On Seawater Acidity And Salinity” By Hugo A. Loáiciga, Ken Caldeira, David Archer, James P. Barry, Richard G. Bellerby, Peter G. Brewer, Long Cao, Andrew G. Dickson, Scott C. Doney, Harry Elderfield, Victoria J. Fabry, Richard A. Feely, Jean-Pierre Gattuso, Peter M. Haugan, Ove Hoegh-Guldberg, Atul K. Jain, Joan A. Kleypas, Chris Langdon, James C. Orr, Andy Ridgwell, Christopher L. Sabine, Brad A. Seibel, Yoshihisa Shirayama, Carol Turley, Andrew J. Watson, Richard E. Zeebe
Marine Science Faculty Publications
No abstract provided.
Exploring The Vast Diversity Of Marine Viruses, Mya Breitbart, Luke Thompson, Curtis Suttle, Matthew Sullivan
Exploring The Vast Diversity Of Marine Viruses, Mya Breitbart, Luke Thompson, Curtis Suttle, Matthew Sullivan
Marine Science Faculty Publications
No abstract provided.
Long-Term And Storm-Related Shoreline Change Trends In The Florida Gulf Islands National Seashore, Cheryl J. Hapke, Mark Christiano
Long-Term And Storm-Related Shoreline Change Trends In The Florida Gulf Islands National Seashore, Cheryl J. Hapke, Mark Christiano
Marine Science Faculty Publications
Coastal erosion on Northern Gulf of Mexico barrier islands is an ongoing issue that was exacerbated by the storm seasons of 2004 and 2005 when several hurricanes made landfall in the Gulf of Mexico. Two units of the Gulf Islands National Seashore (GUIS), located on Santa Rosa Island, a barrier island off the Panhandle coast of Florida, were highly impacted during the hurricanes of 2004 (Ivan) and 2005 (Cindy, Dennis, Katrina and Rita). In addition to the loss of or damage to natural and cultural resources within the park, damage to park infrastructure, including park access roads and utilities, occurred …
Orbital And Atmospheric Forcing Of Western Antarctic Peninsula Climate In The Holocene: The Tex86 Paleotemperature Record Of Palmer Deep, Amelia E. Shevenell, A. E. Ingalls, E. W. Domack
Orbital And Atmospheric Forcing Of Western Antarctic Peninsula Climate In The Holocene: The Tex86 Paleotemperature Record Of Palmer Deep, Amelia E. Shevenell, A. E. Ingalls, E. W. Domack
Marine Science Faculty Publications
A detailed TEX86 sea surface temperature record is presented from a well-dated hemipelagic sedimentary sequence drilled in Palmer Deep, on the western Antarctic Peninsula continental margin (ODP Hole 1098B; 1010 m). To test the regional utility of the TEX86 proxy, surface sediment samples with paired CTD casts were acquired and results show the promise of TEX86 in this region. Down core TEX86-derived temperatures at Site 1098 range between 0 and 6°C during the Holocene (0-12 ky). A long-term Holocene cooling of ~3°C is suggested and is punctuated by millennial scale temperature variability. The TEX86 …
National Assessment Of Shoreline Change, Part 4: Historical Coastal Cliff Retreat Along The California Coast, Cheryl J. Hapke, David Reid
National Assessment Of Shoreline Change, Part 4: Historical Coastal Cliff Retreat Along The California Coast, Cheryl J. Hapke, David Reid
Marine Science Faculty Publications
Coastal cliff retreat, the landward migration of the cliff face, is a chronic problem along many rocky coastlines in the United States. As coastal populations continue to grow and community infrastructures are threatened by erosion, there is increased demand for accurate information regarding trends and rates of coastal cliff retreat. There is also a need for a comprehensive analysis of cliff retreat that is consistent from one coastal region to another. To meet these national needs, the U.S. Geological Survey is conducting an analysis of historical coastal cliff retreat along open-ocean rocky coastlines of the conterminous United States and parts …