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2017

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The Potential Of Atmospheric Air Cold Plasma For Control Of Bacterial Contaminants Relevant To Cereal Grain Production, Agata Los, Dana Ziuzina, Daniela Boehm, Patrick J. Cullen, Paula Bourke Jan 2017

The Potential Of Atmospheric Air Cold Plasma For Control Of Bacterial Contaminants Relevant To Cereal Grain Production, Agata Los, Dana Ziuzina, Daniela Boehm, Patrick J. Cullen, Paula Bourke

Articles

The aim of this work was to investigate the efficacy of dielectric barrier discharge atmospheric cold plasma (DBD ACP) against bacteria associated with grains quality and safety. ACP inactivation efficacy was tested against biofilms formed by different strains of E. coli, Bacillus and Lactobacillus in grain model media and against B. atrophaeus endospores either in grain media or attached on abiotic surfaces. Effects were dependent on bacterial strain, media composition and mode of ACP exposure. ACP treatment for 5min reduced E. coli spp., B. subtilis and Lactobacillus spp. biofilms by >3 log10, whereas insignificant reductions were achieved for B. atrophaeus. …

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Facilitating Smart Haccp Strategies With Process Analytical Technology, Fintan Moran, Carl Sullivan, Kevin Keener, Patrick J. Cullen Jan 2017

Facilitating Smart Haccp Strategies With Process Analytical Technology, Fintan Moran, Carl Sullivan, Kevin Keener, Patrick J. Cullen

Articles

The critical feature to any food management system, be it safety or quality focused, is timely and accurate product and process data. The HACCP framework is one of a systematic preventive approach that addresses hazards as a means of prevention rather than finished product inspection. The PAT initiative is a framework which also aims to change product assurance from end-product testing to preventive control through timely measurements of critical product and process parameters. The continued emergence of sensitive yet affordable sensors capable of direct measurement of biological, chemical and physical risks associated with foods during production, processing or over their …

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Coral Larvae For Restoration And Research: A Large-Scale Method For Rearing Acropora Millepora Larvae, Inducing Settlement, And Establishing Symbiosis, F. Joseph Pollock, Sefano M. Katz, Jeroen A.J.M. Van De Water, Sarah W. Davies, Margaux Hein, Gergely Torda, Mikhail V. Matz, Victor H. Beltran, Patrick Buerger, Eneour Puill-Stephan, David Abrego, David G. Bourne, Bette L. Willis Jan 2017

Coral Larvae For Restoration And Research: A Large-Scale Method For Rearing Acropora Millepora Larvae, Inducing Settlement, And Establishing Symbiosis, F. Joseph Pollock, Sefano M. Katz, Jeroen A.J.M. Van De Water, Sarah W. Davies, Margaux Hein, Gergely Torda, Mikhail V. Matz, Victor H. Beltran, Patrick Buerger, Eneour Puill-Stephan, David Abrego, David G. Bourne, Bette L. Willis

All Works

© 2017 Pollock et al. Here we describe an efficient and effective technique for rearing sexually-derived coral propagules from spawning through larval settlement and symbiont uptake with minimal impact on natural coral populations. We sought to maximize larval survival while minimizing expense and daily husbandry maintenance by experimentally determining optimized conditions and protocols for gamete fertilization, larval cultivation, induction of larval settlement by crustose coralline algae, and inoculation of newly settled juveniles with their dinoflagellate symbiont Symbiodinium. Larval rearing densities at or below 0.2 larvae mL-1 were found to maximize larval survival and settlement success in culture tanks while minimizing …

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Threshold Concepts And Core Competences In The Library And Information Science (Lis) Domain: Methodologies For Discovery, Virginia Tucker Jan 2017

Threshold Concepts And Core Competences In The Library And Information Science (Lis) Domain: Methodologies For Discovery, Virginia Tucker

Faculty Publications

Researchers have used a variety of methodologies for investigating threshold concepts, and this paper considers these approaches for library and information science (LIS) domains. The focus is on specific benefits of constructivist grounded theory for eliciting evidence of core knowledge, and elements of research design for this purpose are discussed, including the importance of collecting experiences from the learners themselves as well as effective protocols for data gathering and analysis through the use of active tasks and semi-structured interviews. The discussion extends to implications of the research design for how it may be applied to thematic analysis more broadly and …

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A Qualitative Exploration Of Children’S Experiences Of Role-Play In Two Pack-Away Early Childhood Settings., Zenna Mary Kingdon Jan 2017

A Qualitative Exploration Of Children’S Experiences Of Role-Play In Two Pack-Away Early Childhood Settings., Zenna Mary Kingdon

Plymouth Institute of Education Theses

In this thesis, I explored children’s experiences of role-play in relation to notions of self. The research took place in two pack-away settings in the Private, Voluntary and Independent (PVI) sector of Early Childhood Education and Care (ECEC). The experiences of eight children, aged between three-year-three months and four-years one month, were investigated over a period of seven months. I used an adaptation of The Mosaic Approach (Clark and Moss 2001) combined with a reflective lenses approach (Brookfield 1995) to create a three-dimensional view of the children’s experiences. The children and I used a range of tools to gather data …

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Social Resilience In Cornish Fishing Communities, Huw Thomas Jan 2017

Social Resilience In Cornish Fishing Communities, Huw Thomas

School of Geography, Earth and Environmental Sciences Theses

Rural Cornish coastal fishing communities express, and have expressed, varying degrees of ability to develop and retain social resilience capacity, or the ability to withstand ‘shock’ over both ‘fast’ and ‘slow’ onset events in social, political, economic and natural domain terms (Wilson, 2012a). Endogenous and exogenous influences may include natural changes in resources and resource dependency resulting in the loss or depletion of community livelihoods associated with a decline in fishing activities (Brookfield, 2005; Marshall, 2007a), issues of tourism driven change and notions of ‘community’. Four capitals are initially conceptually considered, those of natural, political, social and economic capitals driving …

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Organophosphate Ester Flame Retardants And Plasticizers In Ocean Sediments From The North Pacific To The Arctic Ocean, Yuxin Ma, Zhiyong Xie, Rainer Lohmann, Wenying Mi, Guoping Gao Jan 2017

Organophosphate Ester Flame Retardants And Plasticizers In Ocean Sediments From The North Pacific To The Arctic Ocean, Yuxin Ma, Zhiyong Xie, Rainer Lohmann, Wenying Mi, Guoping Gao

Graduate School of Oceanography Faculty Publications

The occurence of organophosphate ester (OPE) flame retardants and plasticizers in surface sediment from the North Pacific to Arctic Ocean was observed for the first time during the fourth National Arctic Research Expedition of China in the summer of 2010. The samples were analyzed for three halogenated OPEs [tris(2-chloroethyl) phosphate (TCEP), tris(1-chloro-2-propyl) phosphate (TCPP), and tris(dichloroisopropyl) phosphate], three alkylated OPEs [triisobutyl phosphate (TiBP), tri-n-butyl phosphate, and tripentyl phosphate], and triphenyl phosphate. Σ7OPEs (total concentration of the observed OPEs) was in the range of 159–4658 pg/g of dry weight. Halogenated OPEs were generally more abundant than the …

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Vertical Profiles, Sources And Transport Of Pfass In The Arctic Ocean, Leo W. Y. Yeung, Clifton Dassuncao, Scott Mabury, Elsie M. Sunderland, Xianming Zhang, Rainer Lohmann Jan 2017

Vertical Profiles, Sources And Transport Of Pfass In The Arctic Ocean, Leo W. Y. Yeung, Clifton Dassuncao, Scott Mabury, Elsie M. Sunderland, Xianming Zhang, Rainer Lohmann

Graduate School of Oceanography Faculty Publications

The relative importance of atmospheric versus oceanic transport for poly- and perfluorinated alkyl substances (PFASs) reaching the Arctic Ocean is not well understood. Vertical profiles from the Central Arctic Ocean and shelf water, snow and meltwater samples were collected in 2012; 13 PFASs (C6-C12 PFCAs; C6, 8, 10 PFSAs; MeFOSAA and EtFOSAA, and FOSA) were routinely detected (range: <5 – 343 pg/L). PFASs were only detectable above 150 m depth in the polar mixed layer (PML) and halocline. Enhanced concentrations were observed in snow and meltpond samples, implying atmospheric deposition as an important source of PFASs. Model results suggested atmospheric inputs to account for 34-59% (~11-19 pg/L) of PFASs. Model results suggested atmospheric inputs to account for 34-59% (~11-19 pg/L) of measured PFOA concentrations in the PML (mean 32±15 pg/L). Modeled surface and halocline measurements for PFOS based on North Atlantic inflow (11-36 pg/L) agreed with measurements (mean, 17, range <5-41 pg/L). Modeled deep water concentrations below 200 m (5-15 pg/L) were slightly higher than measurements (<5 pg/L), suggesting the lower bound of PFAS emissions estimates from wastewater and rivers may provide the best estimate of inputs to the Arctic. Despite low concentrations in deep water, this reservoir is expected to contain most of the PFOS mass in the Arctic (63-180 Mg) and projected to continue increasing to 2038.

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North Atlantic Deep Water Formation Inhibits High Arctic Contamination By Continental Perfluorooctane Sulfonate Discharges, Xianming Zhang, Yanxu Zhang, Clifton Dassuncao, Rainer Lohmann, Elsie M. Sunderland Jan 2017

North Atlantic Deep Water Formation Inhibits High Arctic Contamination By Continental Perfluorooctane Sulfonate Discharges, Xianming Zhang, Yanxu Zhang, Clifton Dassuncao, Rainer Lohmann, Elsie M. Sunderland

Graduate School of Oceanography Faculty Publications

Perfluorooctane sulfonate (PFOS) is an aliphatic fluorinated compound with eight carbon atoms that is extremely persistent in the environment and can adversely affect human and ecological health. The stability, low reactivity, and high water solubility of PFOS combined with the North American phase-out in production around the year 2000, make it a potentially useful new tracer for ocean circulation. Here we characterize processes affecting the lifetime and accumulation of PFOS in the North Atlantic Ocean and transport to sensitive Arctic regions by developing a 3-D simulation within the MITgcm. The model captures variability in measurements across biogeographical provinces (R2 …

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The Adolescent Substance Use Risk Continuum: A Cultural, Strengths-Based Approach To Case Conceptualization, Alexis Miller, Jennifer M. Cook Jan 2017

The Adolescent Substance Use Risk Continuum: A Cultural, Strengths-Based Approach To Case Conceptualization, Alexis Miller, Jennifer M. Cook

College of Education Faculty Research and Publications

Many theories are used to conceptualize adolescent substance use, yet none adequately assist mental health professionals in assessing adolescents’ strengths and risk factors while incorporating cultural factors. The authors reviewed common adolescent substance abuse theories and their strengths and limitations, and offer a new model to conceptualize adolescent substance use: The Adolescent Substance Use Risk Continuum. We posit that this strengths-based continuum enables clinicians to decrease stigma and offer hope to adolescents and their caregivers, as it integrates relevant factors to strengthen families and minimize risk. This model is a tool for counselors to use as they conceptualize client cases, …

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Copper And Zinc Speciation In The Tamar Estuary, Holly Beverley Clare Pearson Jan 2017

Copper And Zinc Speciation In The Tamar Estuary, Holly Beverley Clare Pearson

School of Geography, Earth and Environmental Sciences Theses

The chemical speciation of trace metals controls their potential bioavailability and therefore toxicity to exposed organisms. Despite previous studies demonstrating the ameliorative effects of dissolved organic carbon (DOC) on metal toxicity, the effectiveness of ligands from varying sources and of potentially variable composition in controlling speciation has not been studied in detail in estuarine waters. In addition, the effect of DOC on radionuclide contaminants in combination with trace metals has not been investigated in any waters. This is of particular interest in the estuarine environment, where both anthropogenic and natural ligands, and contaminants that pose a potential threat to ecosystem …

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The Seasonal Cycling And Physico-Chemical Speciation Of Iron On The Celtic And Hebridean Shelf Seas, Antony James Birchill Jan 2017

The Seasonal Cycling And Physico-Chemical Speciation Of Iron On The Celtic And Hebridean Shelf Seas, Antony James Birchill

School of Geography, Earth and Environmental Sciences Theses

Shelf seas represent an important source of iron (Fe) to the open ocean. Additionally, shelf seas are highly productive environments which contribute to atmospheric carbon dioxide drawdown and support large fisheries. The work presented in this thesis describes the seasonal cycle of Fe in the Celtic and Hebridean Shelf Seas, and determines the physico-chemical speciation of Fe supplied from oxic margins. The results from repeated field surveys of the central Celtic Sea showed a nutrient type seasonal cycling of dissolved Fe (< 0.2 µm; dFe), which is surprising in a particle rich shelf system, suggesting a balance of scavenging and remineralisation processes. Coincident drawdown of dFe and nitrate (NO3-) was observed during the phytoplankton spring bloom. During the bloom, preferential drawdown of soluble Fe (< 0.02 µm; sFe) over colloidal Fe (0.02-0.2 µm; cFe) indicated greater bioavailability of the soluble fraction. Throughout summer stratification, it is known that NO3- is drawn down to < 0.02 µM in surface waters. This study revealed that both dFe and labile particulate Fe (LpFe) were also seasonally drawn down to < 0.2 nM. Consequently, it is hypothesised that the availability of Fe seasonally co-limits primary production in this region. At depth both dFe and NO3- concentrations increased from spring to autumn, indicating that remineralisation is an important process governing the seasonal cycling of dFe in the central Celtic Sea. In spring, summer and autumn, distinctive intermediate nepheloid layers (INL) were observed emanating from the Celtic Sea shelf slope. The INLs were associated with elevated concentrations of dFe (up to 3.25 ± 0.16 nM) and particulate Fe (up to 315 ± 1.8 nM) indicating that they are a persistent conduit for the supply of Fe to the open ocean. Typically > 15% of particulate Fe was labile and 60-90% of dFe was in the colloidal fraction. Despite being < 50 km from the 200 m isobath, the concentration of dFe was < 0.1 nM in surface waters at several stations. Broadly, the concentration of nutrients in surface waters described an oligotrophic environment where co-limitation between multiple nutrients, including Fe, appears likely. Over the Hebridean shelf break, residual surface NO3- concentrations (5.27 ± 0.79 µM) and very low concentrations of dFe (0.09 ± 0.04 nM) were observed during autumn, implying seasonal Fe limitation. The dFe:NO3- ratio observed is attributed to sub-optimal vertical supply of Fe relative to NO3- from sub-surface waters. In contrast to the shelf break, surface water in coastal regions contained elevated dFe concentrations (1.73 ± 1.16 nM) alongside low NO3-. Seasonal Fe limitation is known to occur in the Irminger and Iceland Basins; therefore, the Hebridean shelf break likely represents the eastern extent of sub-Arctic Atlantic seasonal Fe limitation, thus indicating that the associated weakening of the biological carbon pump exists over a wider region of the sub-Arctic Atlantic than previously recognised. These key findings demonstrate that the availability of Fe to phytoplankton may seasonally reach limiting levels in temperate shelf waters and that oxic margins persistently supply Fe dominated by colloidal and particulate fractions to the ocean.

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Nanoporous Calcium Carbonate-Based Substrates For The Controlled Delivery Of Functional Materials, Charlotte Luanne Victoria Levy Jan 2017

Nanoporous Calcium Carbonate-Based Substrates For The Controlled Delivery Of Functional Materials, Charlotte Luanne Victoria Levy

School of Geography, Earth and Environmental Sciences Theses

The overall aim of this project was to study `functionalised' calcium carbonates (FCCs) for use as a carrier for the controlled release of `actives,' by permeation and diffusion, and is being proposed as an environmentally friendly and non-toxic pharmaceutical excipient, nutraceutical, and flavour carrier. The delivery of a drug to its target site in the appropriate amount and time-frame in order for it to have a controlled release effect whilst achieving the maximum therapeutic effect remains a topic of design and development for novel drug delivery systems. FCCs encompass a family of new pharmaceutical excipients in which the conditions of …

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Criminal Law In The 21st Century, Lord Leveson Jan 2017

Criminal Law In The 21st Century, Lord Leveson

The Plymouth Law and Criminal Justice Review

No abstract provided.

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Advances In The Application Of Amino Acid Nitrogen Isotopic Analysis In Ecological And Biogeochemical Studies, Naohiko Ohkouchi, Yoshito Chikaraishi, Hilary Close, Brian Fry, Thomas Larsen, Daniel J. Madigan, Matthew D. Mccarthy, Kelton Mcmahon, Toshi Nagata, Yuichi I. Naito, Nanako O. Ogawa, Brian N. Popp, Shawn Steffan, Yoshinori Takano, Ichiro Tayasu, Alex S. J. Wyatt, Yasuhiko T. Yamaguchi, Yusuke Yokoyama Jan 2017

Advances In The Application Of Amino Acid Nitrogen Isotopic Analysis In Ecological And Biogeochemical Studies, Naohiko Ohkouchi, Yoshito Chikaraishi, Hilary Close, Brian Fry, Thomas Larsen, Daniel J. Madigan, Matthew D. Mccarthy, Kelton Mcmahon, Toshi Nagata, Yuichi I. Naito, Nanako O. Ogawa, Brian N. Popp, Shawn Steffan, Yoshinori Takano, Ichiro Tayasu, Alex S. J. Wyatt, Yasuhiko T. Yamaguchi, Yusuke Yokoyama

Graduate School of Oceanography Faculty Publications

Compound-specific isotopic analysis of amino acids (CSIA-AA) has emerged in the last decade as a powerful approach for tracing the origins and fate of nitrogen in ecological and biogeochemical studies. This approach is based on the empirical observation that source amino acids (SAAs) (i.e., phenylalanine), fractionate 15N very little (< 0.5‰) during trophic transfer, whereas trophic AAs (TAAs) (i.e., glutamic acid), are greatly (∼6–8‰) enriched in 15N during each trophic step. The differential fractionation of these two AA groups can provide a valuable estimate of consumer trophic position that is internally indexed to the baseline δ15N value of the integrated food web. In this paper, we critically review the analytical methods for …

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Exploration Of The Southern California Borderland, Marie-Helene Cormier, Katherine L. C. Bell, Stephanie M. Sharuga, Chris Castillo, James Conrad, Diva Amon, Mark Legg, Michael L. Brennan, Kelsey Barnhill, Lawrence L. Lovell, Ashley Marrazino, Simon L. Klemperer, Renato Kane Jan 2017

Exploration Of The Southern California Borderland, Marie-Helene Cormier, Katherine L. C. Bell, Stephanie M. Sharuga, Chris Castillo, James Conrad, Diva Amon, Mark Legg, Michael L. Brennan, Kelsey Barnhill, Lawrence L. Lovell, Ashley Marrazino, Simon L. Klemperer, Renato Kane

Graduate School of Oceanography Faculty Publications

E/V Nautilus cruise NA075 returned to the Southern California Continental Borderland, an area that remains largely unexplored. Part of the broader North America-Pacific plate boundary, this region extends ~300 km west of the San Andreas Fault and displays an unusually rugged physiography. During the cruise, the multibeam sonar mapped ~5,200 km2 of seafloor, and ROVs Hercules and Argus were deployed for 16 dives to explore geological and biological targets (Figure 1) and collect samples.

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Nautilus Sample 2016: New Techniques And Partnerships, Nicole Raineault, Jeffrey Marlow, Meredith Everett, Peter Etnoyer, Marie-Helene Cormier, Vanessa Knutson, Gonzalo Giribet Jan 2017

Nautilus Sample 2016: New Techniques And Partnerships, Nicole Raineault, Jeffrey Marlow, Meredith Everett, Peter Etnoyer, Marie-Helene Cormier, Vanessa Knutson, Gonzalo Giribet

Graduate School of Oceanography Faculty Publications

In 2016, E/V Nautilus and the ROV Hercules collected 549 geological, biological, and water samples (2,022 subsamples) to characterize several US West Coast national marine sanctuaries, the Cascadia margin, and offshore southern California. Most samples are archived at partnering repositories: geological samples to the Marine Geological Samples Lab at the University of Rhode Island and biological samples to Harvard University’s Museum of Comparative Zoology. The national marine sanctuary samples were split between these repositories and the California Academy of Sciences. During this field season, we experimented with new sampling methods to improve exploration efficiency and robustness.

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Global Analysis Of Depletion And Recovery Of Seabed Biota After Bottom Trawling Disturbance, Jan Geert Hiddink, Simon Jennings, Marija Sciberras, Claire L. Szostek, Kathryn M. Hughes, Nick Ellis, Adriaan D. Rijnsdorp, Robert A. Mcconnaughey, Tessa Mazor, Ray Hilborn, Jeremy S. Collie, C. Roland Pitcher, Ricardo O. Amoroso, Ana M. Parma, Petri Surronen, Michel J. Kaiser Jan 2017

Global Analysis Of Depletion And Recovery Of Seabed Biota After Bottom Trawling Disturbance, Jan Geert Hiddink, Simon Jennings, Marija Sciberras, Claire L. Szostek, Kathryn M. Hughes, Nick Ellis, Adriaan D. Rijnsdorp, Robert A. Mcconnaughey, Tessa Mazor, Ray Hilborn, Jeremy S. Collie, C. Roland Pitcher, Ricardo O. Amoroso, Ana M. Parma, Petri Surronen, Michel J. Kaiser

Graduate School of Oceanography Faculty Publications

Bottom trawling is the most widespread human activity affecting seabed habitats. Here, we collate all available data for experimental and comparative studies of trawling impacts on whole communities of seabed macroinvertebrates on sedimentary habitats and develop widely applicable methods to estimate depletion and recovery rates of biota after trawling. Depletion of biota and trawl penetration into the seabed are highly correlated. Otter trawls caused the least depletion, removing 6% of biota per pass and penetrating the seabed on average down to 2.4 cm, whereas hydraulic dredges caused the most depletion, removing 41% of biota and penetrating the seabed on average …

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Numerical Investigation Of The Arctic Ice–Ocean Boundary Layer And Implications For Air–Sea Gas Fluxes, Arash Bigdeli, Brice Loose, An T. Nguyen, Sylvia T. Cole Jan 2017

Numerical Investigation Of The Arctic Ice–Ocean Boundary Layer And Implications For Air–Sea Gas Fluxes, Arash Bigdeli, Brice Loose, An T. Nguyen, Sylvia T. Cole

Graduate School of Oceanography Faculty Publications

In ice-covered regions it is challenging to determine constituent budgets – for heat and momentum, but also for biologically and climatically active gases like carbon dioxide and methane. The harsh environment and relative data scarcity make it difficult to characterize even the physical properties of the ocean surface. Here, we sought to evaluate if numerical model output helps us to better estimate the physical forcing that drives the air–sea gas exchange rate (k) in sea ice zones. We used the budget of radioactive 222Rn in the mixed layer to illustrate the effect that sea ice forcing has …

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The Florence Statement On Triclosan And Triclocarban, Rolf U. Halden, Avery E. Lindeman, Allison E. Aiello, David Andrews, William A. Arnold, Patricia Fair, Rebecca E. Fuoco, Laura A. Geer, Paula I. Johnson, Rainer Lohmann, Kristopher Mcneill, Victoria P. Sacks, Ted Schettler, Roland Weber, R. Thomas Zoeller, Arlene Blum Jan 2017

The Florence Statement On Triclosan And Triclocarban, Rolf U. Halden, Avery E. Lindeman, Allison E. Aiello, David Andrews, William A. Arnold, Patricia Fair, Rebecca E. Fuoco, Laura A. Geer, Paula I. Johnson, Rainer Lohmann, Kristopher Mcneill, Victoria P. Sacks, Ted Schettler, Roland Weber, R. Thomas Zoeller, Arlene Blum

Graduate School of Oceanography Faculty Publications

The Florence Statement on Triclosan and Triclocarban documents a consensus of more than 200 scientists and medical professionals on the hazards of and lack of demonstrated benefit from common uses of triclosan and triclocarban. These chemicals may be used in thousands of personal care and consumer products as well as in building materials. Based on extensive peer-reviewed research, this statement concludes that triclosan and triclocarban are environmentally persistent endocrine disruptors that bioaccumulate in and are toxic to aquatic and other organisms. Evidence of other hazards to humans and ecosystems from triclosan and triclocarban is presented along with recommendations intended to …

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How Well Does Wind Speed Predict Air‐Sea Gas Transfer In The Sea Ice Zone? A Synthesis Of Radon Deficit Profiles In The Upper Water Column Of The Arctic Ocean, Brice Loose, Roger P. Kelly, A. Bigdeli, W. Williams, M. Rutgers Van Der Loeff, S. B. Moran Jan 2017

How Well Does Wind Speed Predict Air‐Sea Gas Transfer In The Sea Ice Zone? A Synthesis Of Radon Deficit Profiles In The Upper Water Column Of The Arctic Ocean, Brice Loose, Roger P. Kelly, A. Bigdeli, W. Williams, M. Rutgers Van Der Loeff, S. B. Moran

Graduate School of Oceanography Faculty Publications

We present 34 profiles of radon‐deficit from the ice‐ocean boundary layer of the Beaufort Sea. Including these 34, there are presently 58 published radon‐deficit estimates of air‐sea gas transfer velocity (k) in the Arctic Ocean; 52 of these estimates were derived from water covered by 10% sea ice or more. The average value of k collected since 2011 is 4.0 ± 1.2 m d−1. This exceeds the quadratic wind speed prediction of weighted kws = 2.85 m d−1 with mean‐weighted wind speed of 6.4 m s−1. We show how ice cover changes …

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A Global Biogeographic Classification Of The Mesopelagic Zone, Tracey T. Sutton, Malcolm R. Clark, Daniel C. Dunn, Patrick N. Halpin, Alex D. Rogers, John Guinotte, Steven J. Bograd, Martin V. Angel, Jose Angel Alvarez Perez, Karen F. Wishner, Richard L. Haedrich, Dhugal J. Lindsay, Jeffrey C. Drazen, Alexander Vereshchaka, Uwe Piatkowski, Telmo Morato, Katarzyna Błachowiak-Samołyk, Bruce H. Robinson, Kristina M. Gjerde, Annelies Pierrot-Bults, Patricio Bernal, Gabriel Reygondeau, Mikko Heino Jan 2017

A Global Biogeographic Classification Of The Mesopelagic Zone, Tracey T. Sutton, Malcolm R. Clark, Daniel C. Dunn, Patrick N. Halpin, Alex D. Rogers, John Guinotte, Steven J. Bograd, Martin V. Angel, Jose Angel Alvarez Perez, Karen F. Wishner, Richard L. Haedrich, Dhugal J. Lindsay, Jeffrey C. Drazen, Alexander Vereshchaka, Uwe Piatkowski, Telmo Morato, Katarzyna Błachowiak-Samołyk, Bruce H. Robinson, Kristina M. Gjerde, Annelies Pierrot-Bults, Patricio Bernal, Gabriel Reygondeau, Mikko Heino

Graduate School of Oceanography Faculty Publications

We have developed a global biogeographic classification of the mesopelagic zone to reflect the regional scales over which the ocean interior varies in terms of biodiversity and function. An integrated approach was necessary, as global gaps in information and variable sampling methods preclude strictly statistical approaches. A panel combining expertise in oceanography, geospatial mapping, and deep-sea biology convened to collate expert opinion on the distributional patterns of pelagic fauna relative to environmental proxies (temperature, salinity, and dissolved oxygen at mesopelagic depths). An iterative Delphi Method integrating additional biological and physical data was used to classify biogeographic ecoregions and to identify …

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Obtaining Phytoplankton Diversity From Ocean Color: A Scientific Roadmap For Future Development, Astrid Bracher, Heather A. Bouman, Robert J.W. Brewin, Annick Bricaud, Vanda Brotas, Aurea M. Ciotti, Lesley Clementson, Emmanuel Devred, Annalisa Di Cicco, Stephanie Dutkiewicz, Nick J. Hardman-Mountford, Anna E. Hickman, Martin Hieronymi, Takafumi Hirata, Svetlana N. Losa, Colleen B. Mouw, Emanuele Organelli, Dionysios E. Raitsos, Julia Uitz, Meike Vogt, Aleksandra Wolanin Jan 2017

Obtaining Phytoplankton Diversity From Ocean Color: A Scientific Roadmap For Future Development, Astrid Bracher, Heather A. Bouman, Robert J.W. Brewin, Annick Bricaud, Vanda Brotas, Aurea M. Ciotti, Lesley Clementson, Emmanuel Devred, Annalisa Di Cicco, Stephanie Dutkiewicz, Nick J. Hardman-Mountford, Anna E. Hickman, Martin Hieronymi, Takafumi Hirata, Svetlana N. Losa, Colleen B. Mouw, Emanuele Organelli, Dionysios E. Raitsos, Julia Uitz, Meike Vogt, Aleksandra Wolanin

Graduate School of Oceanography Faculty Publications

To improve our understanding of the role of phytoplankton for marine ecosystems and global biogeochemical cycles, information on the global distribution of major phytoplankton groups is essential. Although algorithms have been developed to assess phytoplankton diversity from space for over two decades, so far the application of these data sets has been limited. This scientific roadmap identifies user needs, summarizes the current state of the art, and pinpoints major gaps in long-term objectives to deliver space-derived phytoplankton diversity data that meets the user requirements. These major gaps in using ocean color to estimate phytoplankton community structure were identified as: (a) …

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Global Evaluation Of Particulate Organic Carbon Flux Parameterizations And Implications For Atmospheric Pco2, Lucas Gloege, Galen A. Mckinley, Colleen B. Mouw, Audrey B. Ciochetto Jan 2017

Global Evaluation Of Particulate Organic Carbon Flux Parameterizations And Implications For Atmospheric Pco2, Lucas Gloege, Galen A. Mckinley, Colleen B. Mouw, Audrey B. Ciochetto

Graduate School of Oceanography Faculty Publications

The shunt of photosynthetically derived particulate organic carbon (POC) from the euphotic zone and deep remineralization comprises the basic mechanism of the “biological carbon pump.” POC raining through the “twilight zone” (euphotic depth to 1 km) and “midnight zone” (1 km to 4 km) is remineralized back to inorganic form through respiration. Accurately modeling POC flux is critical for understanding the “biological pump” and its impacts on air‐sea CO2 exchange and, ultimately, long‐term ocean carbon sequestration. Yet commonly used parameterizations have not been tested quantitatively against global data sets using identical modeling frameworks. Here we use a single one‐dimensional …

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Quantification Of Rotavirus Diarrheal Risk Due To Hydroclimatic Extremes Over South Asia: Prospects Of Satellite‐Based Observations In Detecting Outbreaks, M. Alfi Hasan, Colleen B. Mouw, Antarpreet Jutla, Ali S. Akanda Jan 2017

Quantification Of Rotavirus Diarrheal Risk Due To Hydroclimatic Extremes Over South Asia: Prospects Of Satellite‐Based Observations In Detecting Outbreaks, M. Alfi Hasan, Colleen B. Mouw, Antarpreet Jutla, Ali S. Akanda

Graduate School of Oceanography Faculty Publications

Rotavirus is the most common cause of diarrheal disease among children under 5. Especially in South Asia, rotavirus remains the leading cause of mortality in children due to diarrhea. As climatic extremes and safe water availability significantly influence diarrheal disease impacts in human populations, hydroclimatic information can be a potential tool for disease preparedness. In this study, we conducted a multivariate temporal and spatial assessment of 34 climate indices calculated from ground and satellite Earth observations to examine the role of temperature and rainfall extremes on the seasonality of rotavirus transmission in Bangladesh. We extracted rainfall data from the Global …

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A Consumer's Guide To Satellite Remote Sensing Of Multiple Phytoplankton Groups In The Global Ocean, Colleen B. Mouw, Nick J. Hardman-Mountford, Séverine Alvain, Astrid Bracher, Robert J.W. Brewin, Annick Bricaud, Aurea M. Ciotti, Emmanuel Devred, Amane Fujiwara, Takafumi Hirata, Toru Hirawake, Tihomir S. Kostadinov, Shovonlal Roy, Julia Uitz Jan 2017

A Consumer's Guide To Satellite Remote Sensing Of Multiple Phytoplankton Groups In The Global Ocean, Colleen B. Mouw, Nick J. Hardman-Mountford, Séverine Alvain, Astrid Bracher, Robert J.W. Brewin, Annick Bricaud, Aurea M. Ciotti, Emmanuel Devred, Amane Fujiwara, Takafumi Hirata, Toru Hirawake, Tihomir S. Kostadinov, Shovonlal Roy, Julia Uitz

Graduate School of Oceanography Faculty Publications

Phytoplankton are composed of diverse taxonomical groups, which are manifested as distinct morphology, size, and pigment composition. These characteristics, modulated by their physiological state, impact their light absorption and scattering, allowing them to be detected with ocean color satellite radiometry. There is a growing volume of literature describing satellite algorithms to retrieve information on phytoplankton composition in the ocean. This synthesis provides a review of current methods and a simplified comparison of approaches. The aim is to provide an easily comprehensible resource for non-algorithm developers, who desire to use these products, thereby raising the level of awareness and use of …

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Satellite Observation Of Particulate Organic Carbon Dynamics On The Louisiana Continental Shelf, Chengfeng Le, John C. Lehrter, Chuanmin Hu, Hugh Macintyre, Marcus W. Beck Jan 2017

Satellite Observation Of Particulate Organic Carbon Dynamics On The Louisiana Continental Shelf, Chengfeng Le, John C. Lehrter, Chuanmin Hu, Hugh Macintyre, Marcus W. Beck

Marine Science Faculty Publications

Particulate organic carbon (POC) plays an important role in coastal carbon cycling and the formation of hypoxia. Yet, coastal POC dynamics are often poorly understood due to a lack of long-term POC observations and the complexity of coastal hydrodynamic and biogeochemical processes that influence POC sources and sinks. Using field observations and satellite ocean color products, we developed a new multiple regression algorithm to estimate POC on the Louisiana Continental Shelf (LCS) from satellite observations. The algorithm had reliable performance with mean relative error (MRE) of ∼40% and root mean square error (RMSE) of ∼50% for MODIS and SeaWiFS images …

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Land Adjacency Effects On Modis Aqua Top-Of-Atmosphere Radiance In The Shortwave Infrared: Statistical Assessment And Correction, Lian Feng, Chuanmin Hu Jan 2017

Land Adjacency Effects On Modis Aqua Top-Of-Atmosphere Radiance In The Shortwave Infrared: Statistical Assessment And Correction, Lian Feng, Chuanmin Hu

Marine Science Faculty Publications

Satellite measurements of coastal or inland waters near land/water interfaces suffer from land adjacency effects (LAEs), particularly in the short-wave infrared (SWIR) wavelengths. Here a statistical method was developed to quantify the LAEs as the ratio of top-of-atmosphere (TOA) total radiance (Lt, W m−2 µm−1 sr−1) between near-shore pixels and LAE-free offshore pixels (>12 pixels away from land). The calculations were conducted using MODIS Aqua images between 2003 and 2012 over the Madagascar Island, with results showing the dependency of LAEs on different environmental and observational factors. The LAEs decrease dramatically with increasing …

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The Italian Enlightenment And The American Revolution: Cesare Beccaria's Forgotten Influence On American Law, John Bessler Jan 2017

The Italian Enlightenment And The American Revolution: Cesare Beccaria's Forgotten Influence On American Law, John Bessler

All Faculty Scholarship

The influence of the Italian Enlightenment—the Illuminismo—on the American Revolution has long been neglected. While historians regularly acknowledge the influence of European thinkers such as William Blackstone, John Locke and Montesquieu, Cesare Beccaria’s contributions to the origins and development of American law have largely been forgotten by twenty-first century Americans. In fact, Beccaria’s book, Dei delitti e delle pene (1764), translated into English as On Crimes and Punishments (1767), significantly shaped the views of American revolutionaries and lawmakers. The first four U.S. Presidents—George Washington, John Adams, Thomas Jefferson and James Madison—were inspired by Beccaria’s treatise and, in some cases, read …

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Solomonic Judgments And The International Court Of Justice, Nienke Grossman Jan 2017

Solomonic Judgments And The International Court Of Justice, Nienke Grossman

All Faculty Scholarship

This chapter, in a forthcoming book on legitimacy and international courts, analyzes the impact of Solomonic or "split the baby" judgments on the normative and sociological legitimacy of the International Court of Justice.

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