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Articles 31 - 60 of 216
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Patterns Of Transcript Abundance Of Eukaryotic Biogeochemically-Relevant Genes In The Amazon River Plume, Brian L. Zielinski, Andrew E. Allen, Edward J. Carpenter, Victoria J. Coles, Byron C. Crump, Mary Doherty, Rachel A. Foster, Joaquim I. Goes, Helga R. Gomes, Raleigh R. Hood, John P. Mccrow, Joseph P. Montoya, Ahmed Moustafa, Brandon M. Satinsky, Shalabh Sharma, Christa B. Smith, Patricia L. Yager, John H Paul
Patterns Of Transcript Abundance Of Eukaryotic Biogeochemically-Relevant Genes In The Amazon River Plume, Brian L. Zielinski, Andrew E. Allen, Edward J. Carpenter, Victoria J. Coles, Byron C. Crump, Mary Doherty, Rachel A. Foster, Joaquim I. Goes, Helga R. Gomes, Raleigh R. Hood, John P. Mccrow, Joseph P. Montoya, Ahmed Moustafa, Brandon M. Satinsky, Shalabh Sharma, Christa B. Smith, Patricia L. Yager, John H Paul
Marine Science Faculty Publications
The Amazon River has the largest discharge of all rivers on Earth, and its complex plume system fuels a wide array of biogeochemical processes, across a large area of the western tropical North Atlantic. The plume thus stimulates microbial processes affecting carbon sequestration and nutrient cycles at a global scale. Chromosomal gene expression patterns of the 2.0 to 156 μm size-fraction eukaryotic microbial community were investigated in the Amazon River Plume, generating a robust dataset (more than 100 million mRNA sequences) that depicts the metabolic capabilities and interactions among the eukaryotic microbes. Combining classical oceanographic field measurements with metatranscriptomics yielded …
Evaluating Climatic Response To External Radiative Forcing During The Late Miocene To Early Pliocene: New Perspectives From Eastern Equatorial Pacific (Iodp U1338) And North Atlantic (Odp 982) Locations, Anna J. Drury, Cédric M. John, Amelia E. Shevenell
Evaluating Climatic Response To External Radiative Forcing During The Late Miocene To Early Pliocene: New Perspectives From Eastern Equatorial Pacific (Iodp U1338) And North Atlantic (Odp 982) Locations, Anna J. Drury, Cédric M. John, Amelia E. Shevenell
Marine Science Faculty Publications
Orbital‐scale climate variability during the latest Miocene‐early Pliocene is poorly understood due to a lack of high‐resolution records spanning 8.0–3.5 Ma, which resolve all orbital cycles. Assessing this variability improves understanding of how Earth's system sensitivity to insolation evolves and provides insight into the factors driving the Messinian Salinity Crisis (MSC) and the Late Miocene Carbon Isotope Shift (LMCIS). New high‐resolution benthic foraminiferal Cibicidoides mundulus δ18O and δ13C records from equatorial Pacific International Ocean Drilling Program Site U1338 are correlated to North Atlantic Ocean Drilling Program Site 982 to obtain a global perspective. Four long‐term benthic …
Quantification Of Boat Visitation Rates At Artificial And Natural Reefs In The Eastern Gulf Of Mexico Using Acoustic Recorders, Peter Simard, Kara R. Wall, David A. Mann, Carrie C. Wall, Christopher D. Stallings
Quantification Of Boat Visitation Rates At Artificial And Natural Reefs In The Eastern Gulf Of Mexico Using Acoustic Recorders, Peter Simard, Kara R. Wall, David A. Mann, Carrie C. Wall, Christopher D. Stallings
Marine Science Faculty Publications
Artificial reefs are commonly used as a management tool, in part to provide ecosystem services, including opportunities for recreational fishing and diving. Quantifying the use of artificial reefs by recreational boaters is essential for determining their value as ecosystem services. In this study, four artificial–natural reef pairs in the eastern Gulf of Mexico (off western Florida) were investigated for boat visitation rates using autonomous acoustic recorders. Digital SpectroGram (DSG) recorders were used to collect sound files from April 2013 to March 2015. An automatic detection algorithm was used to identify boat noise in individual files using the harmonic peaks generated …
Recent Change - North Sea, Thomas Wahl
Recent Change - North Sea, Thomas Wahl
Marine Science Faculty Publications
This chapter discusses past and ongoing change in the following physical variables within the North Sea: temperature, salinity and stratification; currents and circulation; mean sea level; and extreme sea levels. Also considered are carbon dioxide; pH and nutrients; oxygen; suspended particulate matter and turbidity; coastal erosion, sedimentation and morphology; and sea ice. The distinctive character of the Wadden Sea is addressed, with a particular focus on nutrients and sediments. This chapter covers the past 200 years and focuses on the historical development of evidence (measurements, process understanding and models), the form, duration and accuracy of the evidence available, and what …
Linking Oceanographic Modeling And Benthic Mapping With Habitat Suitability Models For Pink Shrimp On The West Florida Shelf, Peter J. Rubec, Jesse Lewis, David Reed, Christi Santi, Robert H. Weisberg, Lianyuan Zheng, Chris Jenkins, Charles F. Ashbaugh, Curt Lashley, Salvatore Versaggi
Linking Oceanographic Modeling And Benthic Mapping With Habitat Suitability Models For Pink Shrimp On The West Florida Shelf, Peter J. Rubec, Jesse Lewis, David Reed, Christi Santi, Robert H. Weisberg, Lianyuan Zheng, Chris Jenkins, Charles F. Ashbaugh, Curt Lashley, Salvatore Versaggi
Marine Science Faculty Publications
Research was undertaken to model and map the spatial distributions and abundances of pink shrimp Farfantepenaeus duorarum on the West Florida Shelf (WFS) using habitat suitability modeling (HSM). Data loggers and electronic logbook systems on three shrimp boats were used to gather catch and effort data along with bottom temperature, salinity, and depth data at the fishing locations. Vessel monitoring system (VMS) data supplied by the fishing company helped delineate areas with high fishing activity. For the vessels participating in this study, significantly higher mean catch per unit effort (CPUE) of pink shrimp was realized on the WFS during June–September …
Tracking The Hercules 265 Marine Gas Well Blowout In The Gulf Of Mexico, Isabel C. Romero, Tamay Özgökmen, Susan Snyder, Patrick Schwing, Bryan J. O'Malley, Francisco J. Beron‐Vera, Maria J. Olascoaga, Ping Zhu, Edward Ryan, Shuyi S. Chen, Dana L. Wetzel, David Hollander, Steven Murawski
Tracking The Hercules 265 Marine Gas Well Blowout In The Gulf Of Mexico, Isabel C. Romero, Tamay Özgökmen, Susan Snyder, Patrick Schwing, Bryan J. O'Malley, Francisco J. Beron‐Vera, Maria J. Olascoaga, Ping Zhu, Edward Ryan, Shuyi S. Chen, Dana L. Wetzel, David Hollander, Steven Murawski
Marine Science Faculty Publications
On 23 July 2013, a marine gas rig (Hercules 265) ignited in the northern Gulf of Mexico. The rig burned out of control for 2 days before being extinguished. We conducted a rapid‐response sampling campaign near Hercules 265 after the fire to ascertain if sediments and fishes were polluted above earlier baseline levels. A surface drifter study confirmed that surface ocean water flowed to the southeast of the Hercules site, while the atmospheric plume generated by the blowout was in eastward direction. Sediment cores were collected to the SE of the rig at a distance of ∼0.2, 8, …
Sedimentation Pulse In The Ne Gulf Of Mexico Following The 2010 Dwh Blowout, Gregg R. Brooks, Rebekka A. Larson, Patrick Schwing, Isabel C. Romero, Christopher Moore, Gert-Jan Reichart, Tom Jilbert, Jeff P. Chanton, David W. Hastings, Will A. Overholt, Kala P. Marks, Joel E. Kostka, Charles W. Holmes, David Hollander
Sedimentation Pulse In The Ne Gulf Of Mexico Following The 2010 Dwh Blowout, Gregg R. Brooks, Rebekka A. Larson, Patrick Schwing, Isabel C. Romero, Christopher Moore, Gert-Jan Reichart, Tom Jilbert, Jeff P. Chanton, David W. Hastings, Will A. Overholt, Kala P. Marks, Joel E. Kostka, Charles W. Holmes, David Hollander
Marine Science Faculty Publications
The objective of this study was to investigate the impacts of the Deepwater Horizon (DWH) oil discharge at the seafloor as recorded in bottom sediments of the DeSoto Canyon region in the northeastern Gulf of Mexico. Through a close coupling of sedimentological, geochemical, and biological approaches, multiple independent lines of evidence from 11 sites sampled in November/December 2010 revealed that the upper ~1 cm depth interval is distinct from underlying sediments and results indicate that particles originated at the sea surface. Consistent dissimilarities in grain size over the surficial ~1 cm of sediments correspond to excess 234Th depths, which …
Hydrocarbons In Deep-Sea Sediments Following The 2010 Deepwater Horizon Blowout In The Northeast Gulf Of Mexico, Isabel C. Romero, Patrick Schwing, Gregg R Brooks, Rebekka A Larson, David W. Hastings, Greg Ellis, Ethan Goddard, David Hollander
Hydrocarbons In Deep-Sea Sediments Following The 2010 Deepwater Horizon Blowout In The Northeast Gulf Of Mexico, Isabel C. Romero, Patrick Schwing, Gregg R Brooks, Rebekka A Larson, David W. Hastings, Greg Ellis, Ethan Goddard, David Hollander
Marine Science Faculty Publications
The Deepwater Horizon (DWH) spill released 4.9 million barrels of oil into the Gulf of Mexico (GoM) over 87 days. Sediment and water sampling efforts were concentrated SW of the DWH and in coastal areas. Here we present geochemistry data from sediment cores collected in the aftermath of the DWH event from 1000-1500 m water depth in the DeSoto Canyon, NE of the DWH wellhead. Cores were analyzed at high-resolution (at 2 mm and 5 mm intervals) in order to evaluate the concentration, composition and input of hydrocarbons to the seafloor. Specifically, we analyzed total organic carbon (TOC), aliphatic, polycyclic …
Strategic Assessment Of Fisheries Independent Monitoring Programs In The Gulf Of Mexico, Paul Mark Suprenand, Michael Drexler, David L. Jones, Cameron H. Ainsworth
Strategic Assessment Of Fisheries Independent Monitoring Programs In The Gulf Of Mexico, Paul Mark Suprenand, Michael Drexler, David L. Jones, Cameron H. Ainsworth
Marine Science Faculty Publications
This study evaluates information produced from 14 fisheries independent monitoring programs (FIM) in the Gulf of Mexico. We consider the uniqueness of information from each program and its usefulness in estimating fisheries management indices. Biomass values of 35 functional groups are extracted from an operating model (Ecospace) in such a way as to replicate the patterns of historic FIM samplings. Observation error is added to these data in order to create a set of pseudo data that replicates the type and quality of information obtained from FIM programs. The pseudo data then are put into a separate fishery assessment model …
A Decline In Benthic Foraminifera Following The Deepwater Horizon Event In The Northeastern Gulf Of Mexico, Patrick Schwing, Isabel C. Romero, Gregg R Brooks, David W Hastings, Rebekka A Larson, David Hollander
A Decline In Benthic Foraminifera Following The Deepwater Horizon Event In The Northeastern Gulf Of Mexico, Patrick Schwing, Isabel C. Romero, Gregg R Brooks, David W Hastings, Rebekka A Larson, David Hollander
Marine Science Faculty Publications
Sediment cores were collected from three sites (1000-1200 m water depth) in the northeastern Gulf of Mexico from December 2010 to June 2011 to assess changes in benthic foraminiferal density related to the Deepwater Horizon (DWH) event (April-July 2010, 1500 m water depth). Short-lived radioisotope geochronologies (²¹⁰Pb, ²³⁴Th), organic geochemical assessments, and redox metal concentrations were determined to relate changes in sediment accumulation rate, contamination, and redox conditions with benthic foraminiferal density. Cores collected in December 2010 indicated a decline in density (80-93%). This decline was characterized by a decrease in benthic foraminiferal density and benthic foraminiferal accumulation rate (BFAR) …
Fish Sound Production In The Presence Of Harmful Algal Blooms In The Eastern Gulf Of Mexico, Carrie C. Wall, Chad Lembke, Chuanmin Hu, David A. Mann
Fish Sound Production In The Presence Of Harmful Algal Blooms In The Eastern Gulf Of Mexico, Carrie C. Wall, Chad Lembke, Chuanmin Hu, David A. Mann
Marine Science Faculty Publications
This paper presents the first known research to examine sound production by fishes during harmful algal blooms (HABs). Most fish sound production is species-specific and repetitive, enabling passive acoustic monitoring to identify the distribution and behavior of soniferous species. Autonomous gliders that collect passive acoustic data and environmental data concurrently can be used to establish the oceanographic conditions surrounding sound-producing organisms. Three passive acoustic glider missions were conducted off west-central Florida in October 2011, and September and October 2012. The deployment period for two missions was dictated by the presence of red tide events with the glider path specifically set …
Reef-Scale Thermal Stress Monitoring Of Coral Ecosystems: New 5-Km Global Products From Noaa Coral Reef Watch, Gang Liu, Scott F. Heron, C. Mark Eakin, Frank E. Muller-Karger, María Vega-Rodriguez, Liane S. Guild, Jacqueline L. De La Cour, Erick F. Geiger, William J. Skirving, Timothy F. R. Burgess, Alan E. Strong, Andy Harris, Eileen Maturi, Alexander Ignatov, John Sapper, Jianke Li, Susan Lynds
Reef-Scale Thermal Stress Monitoring Of Coral Ecosystems: New 5-Km Global Products From Noaa Coral Reef Watch, Gang Liu, Scott F. Heron, C. Mark Eakin, Frank E. Muller-Karger, María Vega-Rodriguez, Liane S. Guild, Jacqueline L. De La Cour, Erick F. Geiger, William J. Skirving, Timothy F. R. Burgess, Alan E. Strong, Andy Harris, Eileen Maturi, Alexander Ignatov, John Sapper, Jianke Li, Susan Lynds
Marine Science Faculty Publications
The U.S. National Oceanic and Atmospheric Administration (NOAA) Coral Reef Watch (CRW) program has developed a daily global 5-km product suite based on satellite observations to monitor thermal stress on coral reefs. These products fulfill requests from coral reef managers and researchers for higher resolution products by taking advantage of new satellites, sensors and algorithms. Improvements of the 5-km products over CRW’s heritage global 50-km products are derived from: (1) the higher resolution and greater data density of NOAA’s next-generation operational daily global 5-km geo-polar blended sea surface temperature (SST) analysis; and (2) implementation of a new SST climatology derived …
Stable Isotopes In Fish Eye Lenses As Potential Recorders Of Trophic And Geographic History, Amy A. Wallace, David J. Hollander, Ernst B. Peebles
Stable Isotopes In Fish Eye Lenses As Potential Recorders Of Trophic And Geographic History, Amy A. Wallace, David J. Hollander, Ernst B. Peebles
Marine Science Faculty Publications
We evaluated eye lenses as potential recorders of stable isotope histories in fish because they consist of metabolically inert optical proteins that are deposited in successive, concentric circles (laminae) much like otolith circuli and tree rings. We conducted four different tests on lenses from red snapper, red grouper, gag, and white grunt. The first test was a low-resolution screening of multiple individuals (4–5 radial groups of laminae per lens, all species except white grunt). Along the radial axis, all individuals exhibited substantial isotopic variability. Red snapper individuals separated into two groups based on δ15N and gag separated into …
Assessing Climate Variability Effects On Dengue Incidence In San Juan, Puerto Rico, Pablo Méndez-Lázaro, Frank E. Muller-Karger, Daniel Otis, Matthew J Mccarthy, Marisol Peña-Orellana
Assessing Climate Variability Effects On Dengue Incidence In San Juan, Puerto Rico, Pablo Méndez-Lázaro, Frank E. Muller-Karger, Daniel Otis, Matthew J Mccarthy, Marisol Peña-Orellana
Marine Science Faculty Publications
We test the hypothesis that climate and environmental conditions are becoming favorable for dengue transmission in San Juan, Puerto Rico. Sea Level Pressure (SLP), Mean Sea Level (MSL), Wind, Sea Surface Temperature (SST), Air Surface Temperature (AST), Rainfall, and confirmed dengue cases were analyzed. We evaluated the dengue incidence and environmental data with Principal Component Analysis, Pearson correlation coefficient, Mann-Kendall trend test and logistic regressions. Results indicated that dry days are increasing and wet days are decreasing. MSL is increasing, posing higher risk of dengue as the perimeter of the San Juan Bay estuary expands and shorelines move inland. Warming …
A Record Of Anthropogenic Effects On Sedimentation In The Manatee River, Florida, Patrick Schwing, Ashanti Johnson
A Record Of Anthropogenic Effects On Sedimentation In The Manatee River, Florida, Patrick Schwing, Ashanti Johnson
Marine Science Faculty Publications
Increased sedimentation rates have been attributed to increased anthropogenic activity in watersheds throughout Florida and many parts of the world. The Manatee River, located on the west coast of Florida (USA), like many other coastal watersheds, has experienced depletion in natural resources, increased nutrient loading, and increased pollution. LARs (linear accumulation rates) from watersheds throughout Florida suggest that anthropogenic activity increased bulk sedimentation by as much as 4-fold. The objective of this study was to construct a record of sedimentation and improve upon previous studies by determining individual sedimentary constituent MARs (mass accumulation rates) based on short lived radioisotopes (210Pb …
Silica Cycling In The Ultra-Oligotrophic Eastern Mediterranean Sea, M. D. Krom, N. Kress, Kent A. Fanning Ph.D.
Silica Cycling In The Ultra-Oligotrophic Eastern Mediterranean Sea, M. D. Krom, N. Kress, Kent A. Fanning Ph.D.
Marine Science Faculty Publications
Although silica is a key plant nutrient, there have been few studies aimed at understanding the Si cycle in the eastern Mediterranean Sea (EMS). Here we use a combination of new measurements and literature values to explain the silicic acid distribution across the basin and to calculate a silica budget to identify the key controlling processes. The surface water concentration of ∼1 μM, which is unchanging seasonally across the basin, was due to the inflow of western Mediterranean Sea (WMS) water at the Straits of Sicily. It does not change seasonally because there is only a sparse population of diatoms …
Problems Associated With A Lipofuscin Extraction Method Used To Age Blue Crabs Callinectes Sapidus Cultured In Florida, Usa, Claire E. Crowley, Ryan L. Gandy, Kendra L. Daly, Edward S. Van Vleet
Problems Associated With A Lipofuscin Extraction Method Used To Age Blue Crabs Callinectes Sapidus Cultured In Florida, Usa, Claire E. Crowley, Ryan L. Gandy, Kendra L. Daly, Edward S. Van Vleet
Marine Science Faculty Publications
The blue crab Callinectes sapidus is an ecologically and economically important component of marine and estuarine ecosystems of the western Atlantic and Gulf of Mexico. Current stock assessments lack a clear understanding of the age structure of blue crab populations in Florida (USA). Blue crabs and other crustaceans are especially difficult to age because of the complex nature of their discrete, rather than continuous, growth patterns. Chesapeake Bay researchers developed a method of aging blue crabs by assaying the aging pigment lipofuscin extracted from eyestalk nerve tissue. Here we investigated the usefulness of that method in determining the age of …
Consistency Of The Current Global Ocean Observing Systems From An Argo Perspective, K. Von Schuckmann, J.-B. Sallée, D. Chambers, P.-Y. Le Traon, C. Cabanes, F. Gaillard, S. Speich, M. Hamon
Consistency Of The Current Global Ocean Observing Systems From An Argo Perspective, K. Von Schuckmann, J.-B. Sallée, D. Chambers, P.-Y. Le Traon, C. Cabanes, F. Gaillard, S. Speich, M. Hamon
Marine Science Faculty Publications
Variations in the world's ocean heat storage and its associated volume changes are a key factor to gauge global warming and to assess the earth's energy and sea level budget. Estimating global ocean heat content (GOHC) and global steric sea level (GSSL) with temperature/salinity data from the Argo network reveals a positive change of 0.5 ± 0.1 W m−2 (applied to the surface area of the ocean) and 0.5 ± 0.1 mm year−1 during the years 2005 to 2012, averaged between 60° S and 60° N and the 10–1500 m depth layer. In this study, we present an …
The Gut Of Geographically Disparate Ciona Intestinalis Harbors A Core Microbiota, Larry J. Dishaw, Jaime Flores-Torres, Simon Lax, Kristina Gemayel, Brittany Leigh, Daniela Melillo, M. Gail Mueller, Lenina Natale, Ivana Zucchetti, Rosaria De Santis, Maria Rosaria Pinto, Gary W. Litman, Jack W. Gilbert
The Gut Of Geographically Disparate Ciona Intestinalis Harbors A Core Microbiota, Larry J. Dishaw, Jaime Flores-Torres, Simon Lax, Kristina Gemayel, Brittany Leigh, Daniela Melillo, M. Gail Mueller, Lenina Natale, Ivana Zucchetti, Rosaria De Santis, Maria Rosaria Pinto, Gary W. Litman, Jack W. Gilbert
Marine Science Faculty Publications
It is now widely understood that all animals engage in complex interactions with bacteria (or microbes) throughout their various life stages. This ancient exchange can involve cooperation and has resulted in a wide range of evolved host-microbial interdependencies, including those observed in the gut. Ciona intestinalis, a filter-feeding basal chordate and classic developmental model that can be experimentally manipulated, is being employed to help define these relationships. Ciona larvae are first exposed internally to microbes upon the initiation of feeding in metamorphosed individuals; however, whether or not these microbes subsequently colonize the gut and whether or not Ciona forms …
On The Consistency Of Modis Chlorophyll $A$ Products In The Northern South China Sea, S. L. Shang, Q. Dong, Chuanmin M. Hu, G. Lin, Y. H. Li, S. P. Shang
On The Consistency Of Modis Chlorophyll $A$ Products In The Northern South China Sea, S. L. Shang, Q. Dong, Chuanmin M. Hu, G. Lin, Y. H. Li, S. P. Shang
Marine Science Faculty Publications
Chlorophyll a (Chl) concentrations derived from satellite measurements have been used in oceanographic research, for example to interpret eco-responses to environmental changes on global and regional scales. However, it is unclear how existing Chl products compare with each other in terms of accuracy and consistency in revealing temporal and spatial patterns, especially in the optically complex marginal seas. In this study, we examined three MODIS (Moderate Resolution Imaging Spectroradiometer) Chl data products that have been made available to the community by the US National Aeronautics and Space Administration (NASA) using community-accepted algorithms and default parameterization. These included the products derived …
Rna Viral Metagenome Of Whiteflies Leads To The Discovery And Characterization Of A Whitefly-Transmitted Carlavirus In North America, Karyna Rosario, Heather Capobianco, Terry Fei Fan Ng, Mya Breitbart, Jane E. Polston
Rna Viral Metagenome Of Whiteflies Leads To The Discovery And Characterization Of A Whitefly-Transmitted Carlavirus In North America, Karyna Rosario, Heather Capobianco, Terry Fei Fan Ng, Mya Breitbart, Jane E. Polston
Marine Science Faculty Publications
Whiteflies from the Bemisia tabaci species complex have the ability to transmit a large number of plant viruses and are some of the most detrimental pests in agriculture. Although whiteflies are known to transmit both DNA and RNA viruses, most of the diversity has been recorded for the former, specifically for the Begomovirus genus. This study investigated the total diversity of DNA and RNA viruses found in whiteflies collected from a single site in Florida to evaluate if there are additional, previously undetected viral types within the B. tabaci vector. Metagenomic analysis of viral DNA extracted from the whiteflies only …
Characterizing The Impact And Response Of Deep Sea Benthic Foraminifera To The Deepwater Horizon Event In The Northeastern Gulf Of Mexico, Patrick Schwing, Isabel C. Romero, Gregg Brooks, David W. Hastings, Rebekka Larson, L. M. Reilly, David J. Hollander, Jeff P. Chanton
Characterizing The Impact And Response Of Deep Sea Benthic Foraminifera To The Deepwater Horizon Event In The Northeastern Gulf Of Mexico, Patrick Schwing, Isabel C. Romero, Gregg Brooks, David W. Hastings, Rebekka Larson, L. M. Reilly, David J. Hollander, Jeff P. Chanton
Marine Science Faculty Publications
Sediment cores were collected from the Gulf of Mexico to assess the benthic foraminifera (BF) community structure changes in response to the Deepwater Horizon (DWH) event. Short-lived radioisotope geochronologies (210Pb and 234Th), organic geochemical toxicity assessments, and redox metal concentrations were determined to relate changes in sedimentation rate, toxicity levels, and redox conditions with BF abundance. Records from December 2010 document a community-wide decrease in abundance in the upper 10 mm relative to the down-core mean. There is also depletion in the δ13C and Δ14C records of BF calcite (relative to down-core values) that is synchronous with the timing of …
Deglacial Abrupt Climate Change In The Atlantic Warm Pool: A Gulf Of Mexico Perspective, Carlie Williams, Benjamin P. Flower, David W. Hastings, Thomas P. Guilderson, Kelly A. Quinn, Ethan A. Goddard
Deglacial Abrupt Climate Change In The Atlantic Warm Pool: A Gulf Of Mexico Perspective, Carlie Williams, Benjamin P. Flower, David W. Hastings, Thomas P. Guilderson, Kelly A. Quinn, Ethan A. Goddard
Marine Science Faculty Publications
During the last deglaciation, Greenland ice core and North Atlantic sediment records exhibit multiple abrupt climate events including the Younger Dryas cold episode (12.9-11.7 ka). However, evidence for the presence of the Younger Dryas in the Gulf of Mexico (GOM) and the relationship between GOM sea surface temperature (SST) and high-latitude climate change is less clear. We present new Mg/Ca-SST records from two varieties of the planktonic foraminifer Globigerinoides ruber (white and pink) to assess northern GOM SST history from approximately 18.4-10.8 ka. Thirty-five accelerator mass spectrometry (AMS) C-14 dates from Orca Basin core MD02-2550 provide excellent age control and …
Ocean Mass From Grace And Glacial Isostatic Adjustment, D. Chambers, John Wahr, Mark E. Tamisea, R Steven Nerem
Ocean Mass From Grace And Glacial Isostatic Adjustment, D. Chambers, John Wahr, Mark E. Tamisea, R Steven Nerem
Marine Science Faculty Publications
We examine geoid rates and ocean mass corrections from two published global glacial isostatic adjustment (GIA) models, both of which have been used in previous studies to estimate ocean mass trends from Gravity Recovery and Climate Experiment (GRACE) satellite gravity data. These two models are different implementations of the same ice loading history and use similar mantle viscosity profiles. The model results are compared with each other and with geoid rates determined from GRACE during August 2002 to November 2009. When averaged over the global ocean, the two models have rates that differ by nearly 1 mm yr−1 of …
Time Series Of Bio-Optical Properties In A Subtropical Gyre: Implications For The Evaluation Of Interannual Trends Of Biogeochemical Properties, Zhongping Lee, Shaoling Shang, Chuanmin Hu, Marlon Lewis, Robert Arnone, Yonghong Li, Bertrand Lubac
Time Series Of Bio-Optical Properties In A Subtropical Gyre: Implications For The Evaluation Of Interannual Trends Of Biogeochemical Properties, Zhongping Lee, Shaoling Shang, Chuanmin Hu, Marlon Lewis, Robert Arnone, Yonghong Li, Bertrand Lubac
Marine Science Faculty Publications
With a validated Quasi‐Analytical Algorithm, an 11 year (1998–2008) monthly time series of the primary optical properties of waters in the center of the South Pacific gyre was developed from Sea‐viewing Wide Field‐of‐view Sensor (SeaWiFS) and Moderate Resolution Imaging Spectroradiometer (MODIS). Also derived are chlorophyll a (Chl a) concentrations with the operational empirical algorithms for SeaWiFS and MODIS. The optical properties include the absorption coefficient (at 443 nm) of phytoplankton (aph) and that of the combination of detritus and gelbstoff (adg). From these time series, we further derived their annual background (summer low) …
A Global Evaluation Of Ocean Bottom Pressure From Grace, Omct, And Steric-Corrected Altimetry, D. Chambers, Josh K. Willis
A Global Evaluation Of Ocean Bottom Pressure From Grace, Omct, And Steric-Corrected Altimetry, D. Chambers, Josh K. Willis
Marine Science Faculty Publications
Ocean bottom pressure (OBP) from the Gravity Recovery and Climate Experiment (GRACE) and the Ocean Model for Circulation and Tides (OMCT) are compared globally with OBP computed from altimetry corrected for steric variations from Argo floats from January 2005 to December 2007. Two methods of smoothing the GRACE data are examined. The first uses a standard Gaussian smoother with a radius of 300 km. The second method projects those smoothed maps onto empirical orthogonal functions derived from OMCT in a least squares estimation in order to produce maps that better agree with the physical processes embodied by the model. These …
On The Recurrent Ulva Prolifera Blooms In The Yellow Sea And East China Sea, Chuanmin Hu, Daqiu Li, Changsheng Chen, Jianzhong Ge, Frank E. Muller-Karger, Junpeng Liu, Feng Yu, Ming-Xia He
On The Recurrent Ulva Prolifera Blooms In The Yellow Sea And East China Sea, Chuanmin Hu, Daqiu Li, Changsheng Chen, Jianzhong Ge, Frank E. Muller-Karger, Junpeng Liu, Feng Yu, Ming-Xia He
Marine Science Faculty Publications
A massive bloom of the green macroalgae Ulva prolifera (previously known as Enteromorpha prolifera) occurred in June 2008 in the Yellow Sea (YS), resulting in perhaps the largest “green tide” event in history. Using a novel index (Floating Algae Index) and multiresolution remote sensing data from MODIS and Landsat, we show that U. prolifera patches appeared nearly every year between April and July 2000–2009 in the YS and/or East China Sea (ECS), which all originated from the nearshore Subei Bank. A finite volume numerical circulation model, driven by realistic forcing and boundary conditions, confirmed this finding. Analysis of meteorological/environmental …
Moderate Resolution Imaging Spectroradiometer (Modis) Observations Of Cyanobacteria Blooms In Taihu Lake, China, Chuanmin Hu, Zhongping Lee, Ronghua Ma, Kun Yu, Daqiu Li, Shaoling Shang
Moderate Resolution Imaging Spectroradiometer (Modis) Observations Of Cyanobacteria Blooms In Taihu Lake, China, Chuanmin Hu, Zhongping Lee, Ronghua Ma, Kun Yu, Daqiu Li, Shaoling Shang
Marine Science Faculty Publications
A novel approach was used with data from the Moderate Resolution Imaging Spectroradiometer (MODIS) to characterize the intense blooms of cyanobacteria (primarily Microcystis aeruginosa) in Taihu Lake, China's third largest freshwater lake. The approach involves first deriving a floating algae index (FAI) based on the medium‐resolution (250 and 500 m) MODIS reflectance data at 645, 859, and 1240 nm after correction of the ozone/gaseous absorption and Rayleigh scattering effects and then objectively determining the FAI threshold value (−0.004) to separate the bloom and nonbloom waters. By definition, the term “bloom” or “floating algae” refers to bloom where cyanobacteria form …
Hydrological And Oceanic Effects On Polar Motion From Grace And Models, Shaunggen Jin, Don Chambers, Byron D. Tapley
Hydrological And Oceanic Effects On Polar Motion From Grace And Models, Shaunggen Jin, Don Chambers, Byron D. Tapley
Marine Science Faculty Publications
Terrestrial water storage (TWS) and ocean bottom pressure (OBP) are major contributors to the observed polar motion excitations, second only to atmospheric mass movement. However, quantitative assessment of the hydrological and oceanic effects on polar motion remains unclear because of the lack of global observations. In this paper, hydrological and oceanic mass excitations to polar motion are investigated using monthly TWS and OBP derived from the Gravity Recovery and Climate Experiment (GRACE) for January 2003 until December 2008. The results from this analysis are compared with hydrological model excitations from the European Center for Medium-Range Weather Forecasts (ECMWF) and oceanic …
West Florida Shelf: A Natural Laboratory For The Study Of Ocean Acidification, Pamela Hallock, Lisa L. Robbins, Rebekka Larson, Tanya Beck, Patrick Schwing, Michael Martínez-Colón, Brad Gooch
West Florida Shelf: A Natural Laboratory For The Study Of Ocean Acidification, Pamela Hallock, Lisa L. Robbins, Rebekka Larson, Tanya Beck, Patrick Schwing, Michael Martínez-Colón, Brad Gooch
Marine Science Faculty Publications
Declining oceanic pH and carbonate-ion concentrations are well-known consequences of increased atmospheric and surface-ocean partial pressure of carbon dioxide (pCO2). The possible subject of shifts in seawater carbonate chemistry on biocalcification and survival rates of marine organisms provides questions amenable to both experimental and field study (Kleypas and Langdon, 2006). To date, limited quantitative data exist with which to formalize and test hypotheses regarding such impacts, particularly in continental-shelf settings. The continental shelves of Florida provide an ideal natural laboratory in which to test latitudinal (and temperature and depth) shifts in habitat ranges of calcifying organisms. Both the …