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Editor's Commentary: Relation Between Variations In The Intensity Of The Zonal Circulation Of The Atmosphere And The Displacements Of The Semi Permanent Centers Of Action, C.-G. Rossby Jan 2020

Editor's Commentary: Relation Between Variations In The Intensity Of The Zonal Circulation Of The Atmosphere And The Displacements Of The Semi Permanent Centers Of Action, C.-G. Rossby

Journal of Marine Research

Rossby waves! Beta-plane! Here Carl-Gustav Rossby, motivated by observations of weather patterns that move upstream relative to the dominant mid-latitude eastward wind flow, formulates a com-pletely novel linearized theory to account for the tendency for large-scale disturbances to move westward and smaller-scale disturbances to move eastward relative to the winds.

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Classic Article: On The Oxidation Of Organic Matter In Marine Sediments By Bacteria, Selman A. Waksman, Margaret Hotchkiss Jan 2020

Classic Article: On The Oxidation Of Organic Matter In Marine Sediments By Bacteria, Selman A. Waksman, Margaret Hotchkiss

Journal of Marine Research

The question as to whether the organic matter in the sea bottom is inert or is available as a nutrient for the bottom fauna and bottom-inhabiting bacteria is a problem of special interest in the cycle of life in the sea. A number of marine animals, making up the benthos or the bottom fauna, must depend upon this organic matter for their nutrition while the sea bottom also harbors an extensive bacterial population which require the energy to be derived from various nutrient elements for cell synthesis and respiration...

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Editor's Commentary: The Influence Of Deposit-Feeding Organisms On Sediment Stability And Community Trophic Structure, Robert C. Aller, David K. Young Jan 2020

Editor's Commentary: The Influence Of Deposit-Feeding Organisms On Sediment Stability And Community Trophic Structure, Robert C. Aller, David K. Young

Journal of Marine Research

This seminal paper by Donald Rhoads and David Young was a highly creative, interdisciplinary break from the standards of the time. It brought a new focus onto how benthic organisms modify sediment properties, potentially mediating interactions with other species, structuring community distributions, and governing coupling between sedimentary deposits and overlying waters...

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Editor's Commentary: Effect Of Coriolis Force On Edge Waves (I) Investigation Of The Normal Modes, Kenneth H. Brink Jan 2020

Editor's Commentary: Effect Of Coriolis Force On Edge Waves (I) Investigation Of The Normal Modes, Kenneth H. Brink

Journal of Marine Research

In the oceanographic literature, there are not too many publications so clearly ahead of their time as is this one. Reid starts out by asking about the effect of Earth’s rotation on edge waves. Edge waves are essentially long gravity waves found over the continental shelf and up onto the beach. They are topographically constrained to propagate strictly alongshore, but in either direction. By the mid-1950s, interest in this was growing as people realized that edge waves are more than a mathematical curiosity. Rotation was expected to be important for long, low frequency (periods of tens of minutes, out to …

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Classic Article: The Influence Of Deposit-Feeding Organisms On Sediment Stability And Community Trophic Structure, Donald C. Rhoads, David K. Young Jan 2020

Classic Article: The Influence Of Deposit-Feeding Organisms On Sediment Stability And Community Trophic Structure, Donald C. Rhoads, David K. Young

Journal of Marine Research

Deposit-feeding and suspension-feeding benthos in Buzzards Bay, Massachusetts, show marked spatial separation; suspension feeders are largely confined to sandy or firm mud bottoms while deposit feeders attain high densities on soft muddy substrata. Food source and bottom stability have been investigated as potential factors effecting this trophic-group separation. Between October 4, 1967 and August 22, 1969, observations were made at 11 stations in Buzzards Bay, Massachusetts, along two widely separated transects over bottoms ranging in texture from silt to fine and medium sand. Water depths at these stations ranged from 3 m to 20 m. Scuba divers made many of …

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Editor's Commentary: On The Mutual Adjustment Of Pressure And Velocity Distributions In Certain Simple Current Systems, C.-G. Rossby Jan 2020

Editor's Commentary: On The Mutual Adjustment Of Pressure And Velocity Distributions In Certain Simple Current Systems, C.-G. Rossby

Journal of Marine Research

These are the original geostrophic adjustment papers. Rossby starts out by asking what,if anything, limits the ability for a flow to be in geostrophic balance (to precisely follow pressure contours on a rotating planet). This topic is now a classroom standard, but we often forget how insightful the original articles are...

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Relation Between Variations In The Intensity Of The Zonal Circulation Of The Atmosphere And The Displacements Of The Semi-Permanent Centers Of Action, C.-G. Rossby Jan 2020

Relation Between Variations In The Intensity Of The Zonal Circulation Of The Atmosphere And The Displacements Of The Semi-Permanent Centers Of Action, C.-G. Rossby

Journal of Marine Research

This paper attempts to interpret, from a single point of view, several at first sight independent phenomena brought into focus through the synoptic investigations carried on at the Massachusetts Institute of Technology during the last few years. Since this interpretation is very largely based on a consideration of the changes in vorticity which must occur in vertical air columns which are displaced from one latitude to another and since such vorticity changes play a fundamental role also in Ekman’s general ocean current theory (Ekman 1932), the results would appear to be of enough interest to physical oceanographers to warrrant their …

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Editor's Commentary: On The Oxidation Of Organic Matter In Marine Sediments By Bacteria, Robert C. Aller, Margaret Hotchkiss Jan 2020

Editor's Commentary: On The Oxidation Of Organic Matter In Marine Sediments By Bacteria, Robert C. Aller, Margaret Hotchkiss

Journal of Marine Research

Selman Waksman is best known for his work on natural antibiotics, for which he originated the term and received a Nobel Prize. However, he and co-workers also extensively investigated soil microbes and their interactions with biogeochemical processes and elemental cycling...

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Import, Export, And Recycling Of Dissolved Nutrients In The Ogeechee River Estuary (Georgia, Usa), William B. Savidge, Kathryn R. Doyle, Brock Woodson Jan 2020

Import, Export, And Recycling Of Dissolved Nutrients In The Ogeechee River Estuary (Georgia, Usa), William B. Savidge, Kathryn R. Doyle, Brock Woodson

Journal of Marine Research

We constructed an empirical mass balance model of nutrient fluxes in the Ogeechee River estuary (Georgia, USA) from eight surveys of seasonal estuarine nutrient concentrations during 2015 and 2016. The model results indicated a net removal of dissolved phosphorus and a net production of dissolved nitrogen (N) within the estuary over an annual cycle. During summer and autumn low flow periods, much of the dissolved N discharged to the ocean seems to be recycled into the estuary in the form of phytoplankton biomass. As a result, the outwelled N is not new nitrogen fueling coastal production but is nitrogen trapped …

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Classic Article: Steady Flow In A Frictionless Homogenous Ocean, N. P. Fofonoff Jan 2020

Classic Article: Steady Flow In A Frictionless Homogenous Ocean, N. P. Fofonoff

Journal of Marine Research

A mathematical model is developed to study the free (frictionless) steady horizontal flow which can occur in a homogeneous ocean of constant depth. The flow satisfies the dynamic constraint that the vertical component of absolute vorticity is constant along a streamline. The conclusion is reached that in an enclosed ocean a free steady circulation cannot have any slow broad eastward currents. The eastward currents must occur as narrow streams of high velocity and high relative vorticity. Intensified currents are present along the eastern and western coasts. The theory which is developed for the homogeneous ocean of constant depth can be …

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Classic Article: Effect Of Coriolis Force On Edge Waves (I) Investigation Of The Normal Modes, Robert O. Reid Jan 2020

Classic Article: Effect Of Coriolis Force On Edge Waves (I) Investigation Of The Normal Modes, Robert O. Reid

Journal of Marine Research

Essentially two classes of free edge waves can exist on a sloping continental shelf in the presence of Coriolis force. For small longshore wave length, fundamental waves of the first class behave like Stokes edge waves. However, for great wave lengths (of several hundred kilometers or more) the characteristics of the first class are significantly altered. In the northern hemisphere the phase speed for waves moving to the right (facing shore from the sea) exceeds the speed for waves which move to the left. Also, the group velocity for a given edge wave mode has a finite upper limit. Waves …

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Editor's Commentary: The Relationship Of Vertical Turbulence And Spring Diatom Flowerings, Peter Franks Jan 2020

Editor's Commentary: The Relationship Of Vertical Turbulence And Spring Diatom Flowerings, Peter Franks

Journal of Marine Research

The dynamics of spring blooms of phytoplankton in temperate waters are usually associated with H.U. Sverdrup’s 1953 “critical depth” model. However, more than a decade earlier, Gordon Riley published a statistical and mechanistic analysis of data he had gathered over two spring “flowerings” on Georges Bank...

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Classic Article: The Relationship Of Vertical Turbulence And Spring Diatom Flowerings, Gordon A. Riley Jan 2020

Classic Article: The Relationship Of Vertical Turbulence And Spring Diatom Flowerings, Gordon A. Riley

Journal of Marine Research

The causes underlying the initiation of the spring diatom flowering have been a subject of vigorous discussion in recent years. With the gradual accumulation of records it has become quite clear that no one factor controls this peculiar phenomenon. The obvious prerequisite, an abundant supply of nutrient salts in the euphotic zone, is generally satisfied during the autumn and early winter, yet a flowering does not in most cases follow immediately. In a few localities, such as Cape Cod Bay and Ipswich Bay (Bigelow 1926), the Woods Hole region (Fish 1925), and Long Island Sound (Riley 1941a), diatom bursts have …

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Metabolic Profiling Reveals Biochemical Pathways Responsible For Eelgrass Response To Elevated Co2 And Temperature, Carmen C. Zayas-Santiago, Albert Rivas-Ubach, Li-Jung Kuo, Nicholas D. Ward, Richard C. Zimmerman Jan 2020

Metabolic Profiling Reveals Biochemical Pathways Responsible For Eelgrass Response To Elevated Co2 And Temperature, Carmen C. Zayas-Santiago, Albert Rivas-Ubach, Li-Jung Kuo, Nicholas D. Ward, Richard C. Zimmerman

OES Faculty Publications

As CO2 levels in Earth’s atmosphere and oceans steadily rise, varying organismal responses may produce ecological losers and winners. Increased ocean CO2 can enhance seagrass productivity and thermal tolerance, providing some compensation for climate warming. However, the metabolic shifts driving the positive response to elevated CO2 by these important ecosystem engineers remain unknown. We analyzed whole-plant performance and metabolic profiles of two geographically distinct eelgrass (Zostera marina L.) populations in response to CO2 enrichment. In addition to enhancing overall plant size, growth and survival, CO2 enrichment increased the abundance of Calvin Cycle and …

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Antioxidant Compounds From Marine Seaweeds And Their Mechanism Of Action, Trishna Debnath, Eun-Kyung Kim, Kwang-Geun Lee, Narayan Chandra Debnath, Ramkumar Mathur Jan 2020

Antioxidant Compounds From Marine Seaweeds And Their Mechanism Of Action, Trishna Debnath, Eun-Kyung Kim, Kwang-Geun Lee, Narayan Chandra Debnath, Ramkumar Mathur

Journal of Marine Research

Investigation of natural products has moved toward marine environments as they are a source of many biologically active agents. The natural antioxidant compounds isolated from seaweeds provide a valuable contribution to the innovation of new drugs for chronic diseases associated with oxidative stress. While the antioxidant activity and nutritional benefits of various seaweed products are well recognized, their proper utilization as antioxidants remains at initial stages that require further investigative studies. This review provides a detailed study of isolated antioxidant compounds from seaweeds and their major mechanism of action by focusing on the reports from 2015 to 2019. The report …

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Effects Of Hard Clam (Mercenaria Mercenaria) Density And Bottom Shear Stress On Cohesive Sediment Erodibility And Implications For Benthic-Pelagic Coupling, Elka T. Porter, Barbara J. Johnson, Lawrence P. Sanford Jan 2020

Effects Of Hard Clam (Mercenaria Mercenaria) Density And Bottom Shear Stress On Cohesive Sediment Erodibility And Implications For Benthic-Pelagic Coupling, Elka T. Porter, Barbara J. Johnson, Lawrence P. Sanford

Journal of Marine Research

The interacting effects of little neck hard clam (Mercenaria mercenaria) density and bottom shear stress on cohesive sediment erodibility were investigated. Short-term stepwise erosion experiments in 30 and 40 cm diameter Gust microcosms over a range of 0.0083 to 0.1932 Pa were performed using sequential 20-minute constant shear stress steps while sampling turbidity regularly. In addition, sediment erodibility was monitored in two one-month long ecosystem experiments with tidal resuspension and 0, 10, and 50 hard clams in 1 m3 shear turbulence resuspension mesocosms (STURM) with an initial stepwise erosion experiment (0.313 to 0.444 Pa). In short-term erosion …

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Editor's Commentary: Steady Flow In A Frictionless Homogenous Ocean, Kenneth H. Brink Jan 2020

Editor's Commentary: Steady Flow In A Frictionless Homogenous Ocean, Kenneth H. Brink

Journal of Marine Research

Before the publication of this article, Stommel (1948) and Munk (1950) published their linear, frictional models of steady wind-driven ocean gyres. The innovative advance they introduced was that their models included western boundary currents (e.g., the Gulf Stream)for the first time. These were really exciting advances. Yet, these models had some dreamlike qualities (to paraphrase Stommel) in that the flow patterns were very smooth, that the intense current always hugged the western boundary, and that the eastward interior flow is broadly distributed across latitudes...

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On The Mutual Adjustment Of Pressure And Velocity Distributions In Certain Simple Current Systems, Ii, C.-G. Rossby Jan 2020

On The Mutual Adjustment Of Pressure And Velocity Distributions In Certain Simple Current Systems, Ii, C.-G. Rossby

Journal of Marine Research

In a previous report (Rossby 1937) the author investigated certain changes in the mass distribution which accompany the slow lateral diffusion of momentum in a straight parallel current in an unlimited ocean of constant depth…

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Science, Diplomacy, And The Red Sea's Unique Coral Reef: It's Time For Action, Karine Kleinhaus, Ali Al-Sawalmih, Daniel J. Barshis, Amatzia Genin, Lola N. Grace, Ove Hoegh-Guldberg, Yossi Loya, Anders Meiborn, Eslam O. Osman, Jean-Daniel Ruch, Yonathan Shaked, Christian R. Voolstra, Assaf Zvuloni, Maoz Fine Jan 2020

Science, Diplomacy, And The Red Sea's Unique Coral Reef: It's Time For Action, Karine Kleinhaus, Ali Al-Sawalmih, Daniel J. Barshis, Amatzia Genin, Lola N. Grace, Ove Hoegh-Guldberg, Yossi Loya, Anders Meiborn, Eslam O. Osman, Jean-Daniel Ruch, Yonathan Shaked, Christian R. Voolstra, Assaf Zvuloni, Maoz Fine

Biological Sciences Faculty Publications

Rapid ocean warming due to climate change poses a serious risk to the survival of coral reefs. It is estimated that 70–90 percent of all reefs will be severely degraded by mid-century even if the 1.5°C goal of the Paris Climate Agreement is achieved. However, one coral reef ecosystem seems to be more resilient to rising sea temperatures than most others. The Red Sea’s reef ecosystem is one of the longest continuous living reefs in the world, and its northernmost portion extends into the Gulf of Aqaba. The scleractinian corals in the Gulf have an unusually high tolerance for the …

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Mdpi Oceans: A New Publication Channel For Open Access Science Focused On The Ocean, Antonio Bode, Fátima Abrantes, Agostinho Antunes, Alvise Benetazzo, Chen-Tung A. Chen, Emmanuel Devred, Martin Gade, Eulàlia Gràcia, Jochen Horstmann, Diego Macías, Joseph M. Maina, Pere Masqué Barri, Nicholas Meskhidze, Luis Somoza Jan 2020

Mdpi Oceans: A New Publication Channel For Open Access Science Focused On The Ocean, Antonio Bode, Fátima Abrantes, Agostinho Antunes, Alvise Benetazzo, Chen-Tung A. Chen, Emmanuel Devred, Martin Gade, Eulàlia Gràcia, Jochen Horstmann, Diego Macías, Joseph M. Maina, Pere Masqué Barri, Nicholas Meskhidze, Luis Somoza

Research outputs 2014 to 2021

The ocean is the most important subsystem of the Earth’s climate system and functions as its heart, regulating the energy distribution of the planet. It has absorbed more than 90% of the energy accumulated since 1971 and about 30% of the emitted anthropogenic carbon dioxide. As a result, water temperature rises and oceans acidify and deoxygenate, which lead to changes in oceanic circulationand biogeochemistry, to rising sea levels, to more extreme weather events, to shifts in the distribution ofspecies and migratory routes, and to loss of species and habitat diversity. Awareness of the importanceof oceans for the sustainability of the …

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Climate Change And Big Business: The Endless Cycle, Angela Steele Dec 2019

Climate Change And Big Business: The Endless Cycle, Angela Steele

Capstone Projects and Master's Theses

Climate change, as it stands, is a large topic. As it relates to business, it grows exponentially, yet relates to every single one of us. Before the nineteenth century, climate cycles were mostly naturally occurring. Unfortunately, in recent years anthropogenic (human) causes have been introduced. The largest problem is carbon dioxide, which is produced from numerous human activities but largely from the burning of fossil fuels, and leads to massive warming effects on our planet. That’s where business comes in: companies, such as those within the agriculture, fossil fuel, and sunscreen industries, seek multi-million dollar profits off of the warming …

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Erratum Jan 2019

Erratum

Journal of Marine Research

Please note the correction to the following article: Bouzaiene, Maher, Milena Menna, Pierre-Marie Poulain, and Dalila Elhmaidi. 2018.“Lagrangian dispersion characteristics in the Western Mediterranean.” Journal of Marine Research 5–6, 139–161. https://doi.org/10.1357/002224018826473290.

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Vortex Competition In Coastal Outflows, Sean Jamshidi, Edward Johnson Jan 2019

Vortex Competition In Coastal Outflows, Sean Jamshidi, Edward Johnson

Journal of Marine Research

Experiments and field observations have shown that there are at least two modes of behavior for river plumes. In many cases, the plume turns to the right (in the Northern Hemisphere) on leaving the river mouth and follows the direction of Kelvin-wave propagation. Alternatively, a “bulge” can form in the plume and a fraction of the outflow volume becomes trapped near the mouth. This paper discusses how bulge formation can be affected by the vorticity profile at the river mouth. Due to the image effect, regions of cyclonic vorticity tend to propagate rightwards, whereas regions of anticyclonic vorticity propagate leftward …

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The Regulation Of Oxygen To Low Concentrations In Marine Oxygen-Minimum Zones, Don E. Canfield, Beate Kraft, Carolin R. Löscher, Richard A. Boyle, Bo Thamdrup, Frank J. Stewart Jan 2019

The Regulation Of Oxygen To Low Concentrations In Marine Oxygen-Minimum Zones, Don E. Canfield, Beate Kraft, Carolin R. Löscher, Richard A. Boyle, Bo Thamdrup, Frank J. Stewart

Journal of Marine Research

The Bay of Bengal hosts persistent, measurable, but sub-micromolar, concentrations of oxygen in its oxygen-minimum zone (OMZ). Such low-oxygen conditions are not necessarily rare in the global ocean and seem also to characterize the OMZ of the Pescadero Basin in the Gulf of California, as well as the outer edges of otherwise anoxic OMZs, such as can be found, for example, in the Eastern Tropical North Pacific. We show here that biological controls on oxygen consumption are required to allow the semistable persistence of low-oxygen conditions in OMZ settings; otherwise, only small changes in physical mixing or rates of primary …

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Advancing Science From Plankton To Whales—Celebrating The Contributions Of James J. Mccarthy, Patricia M. Glibert, Mark A. Altabet, Joseph P. Montoya, Dennis J. Mcgillicuddy Jr. Jan 2019

Advancing Science From Plankton To Whales—Celebrating The Contributions Of James J. Mccarthy, Patricia M. Glibert, Mark A. Altabet, Joseph P. Montoya, Dennis J. Mcgillicuddy Jr.

Journal of Marine Research

Hailing from Sweet Home, Oregon, where his father introduced him to the fascinations of pondwater (McCarthy 2018), Jim McCarthy graduated from Gonzaga University, and in the late 1960s joined the Food Chain Research Group at the Scripps Institution of Oceanography, where he received his doctorate in 1971. The Food Chain Research Group, which was becoming recognized as the premier research group on plankton, was at that time directed by such distinguished scientists as John Strickland and Dick Eppley, among others. The goal of the Food Chain Group was to understand plankton dynamics and trophodynamics, “to a degree that will enable …

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Urea Uptake And Urease Activity In The Chesapeake Bay, Caroline M. Solomon Jan 2019

Urea Uptake And Urease Activity In The Chesapeake Bay, Caroline M. Solomon

Journal of Marine Research

The importance of urea in supplying the nitrogen (N) required by planktonic communities has long been recognized, notably by James J. McCarthy in studies as early as the 1970s. Utilization of urea involves a two-step enzymatic process in phytoplankton, with urea first entering the cell via transport (i.e., urea uptake), followed by the conversion of urea into ammonium by the enzyme urease. This article describes a series of field observations and experiments conducted in the Chesapeake Bay, USA, from 2001 through 2018, aimed at understanding the relationship between urea uptake and urease activity and the role of environmental factors on …

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N-Loss Stoichiometry In A Peru Odz Eddy, Mark A. Altabet, Annie Bourbonnais Jan 2019

N-Loss Stoichiometry In A Peru Odz Eddy, Mark A. Altabet, Annie Bourbonnais

Journal of Marine Research

Assuming heterotrophic denitrification as the dominant microbial process, Richards (1965) formulated a stoichiometry governing nitrogen loss in open-ocean oxygen deficient zones (ODZs). It prescribes the quantitative coupling between the oxidation of organic matter by NO–3 in the absence of O2 and the corresponding production of CO2, N2, and PO–34. Applied globally, this relationship defines key linkages between the C, N, and P cycles. However, the validity of Richards's stoichiometry is challenged by recognition of complex microbial N processing in ODZs including anammox as an important pathway and nitrite reoxidation. Whereas …

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The Wave-Current Interaction In The Coastal Area, Homayoon Komijani, Jaak Monbaliu Jan 2019

The Wave-Current Interaction In The Coastal Area, Homayoon Komijani, Jaak Monbaliu

Journal of Marine Research

In our investigation of the effect of wind-waves on barotropic mean flow in coastal areas, we compare two methods for calculating wave-induced force. The wave field is simulated by the nearshore spectral wave model SWAN. The wave-induced force (calculated using the radiation stress gradient and dissipation methods) and the Stokes drift are integrated in the COHERENS circulation model in the depth-averaged mode. The coupled set is validated using well-known academic test cases of planar beach and single-barred beach. Finally, in a two-dimensional test case based on Belgian coastal waters we compare simulations of mean flow using the two methods of …

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Comparing Apples To Oranges: Perspectives On Satellite-Based Primary Production Estimates Drawn From A Global Biogeochemical Model, Charles A. Stock Jan 2019

Comparing Apples To Oranges: Perspectives On Satellite-Based Primary Production Estimates Drawn From A Global Biogeochemical Model, Charles A. Stock

Journal of Marine Research

Net primary production (NPP) by microscopic phytoplankton underpins nearly all marine life, yet global NPP estimates differ substantially. Among satellite-based estimates, variation has been attributed to differing assumptions about the relationships between photosynthesis and sea surface temperature (SST). Maximum chlorophyll (Chl)–specific rates of carbon fixation in the water column (PBopt) increase monotonically with SST in some satellite algorithms, whereas others peak at intermediate values. Understanding and constraining such relationships is challenged by the many direct and indirect relationships between temperature and phytoplankton. In this article, the emergent PBopt-SST relationship was diagnosed in a …

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Deep Circulation In The Lau Basin And Havre Trough Of The Western South Pacific Ocean From Floats And Hydrography, Elizabeth Simons, Kevin Speer, Andreas M. Thurnherr Jan 2019

Deep Circulation In The Lau Basin And Havre Trough Of The Western South Pacific Ocean From Floats And Hydrography, Elizabeth Simons, Kevin Speer, Andreas M. Thurnherr

Journal of Marine Research

A system of meridional ridges in the western South Pacific Ocean frame the Lau Basin and Havre Trough, and form a barrier to direct communication between the far western South Pacific basins and the interior South Pacific Ocean. The eastern side of this system comprises the Tonga and Kermadec Ridges, the location of the main deep western boundary current entering the Pacific Ocean. Observations from floats released in the Lau Basin as part of the RIDGE2000 program suggested the presence of a western boundary current along the Lau Ridge exiting into the North Fiji Basin. Those observations, together with Argo …

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