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Geophysical controls on metabolic cycling in three Patagonian fjords Prog. Oceanogr. (IF 4.416) Pub Date : 2022-08-10 Joseph R. Crosswell, Francisco Bravo, Iván Pérez-Santos, Geoffrey Carlin, Nagur Cherukuru, Cassie Schwanger, Rob Gregor, Andrew D.L. Steven
Biogeochemical cycling in fjords underpins crucial environmental and economic functions including carbon sequestration and food security, and a fundamental understanding of the controls on these cycles is essential for sustainable management of fjords that are facing increasing climate and anthropogenic stressors. However, the interaction of external forcing and local geomorphology in fjords leads
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Sclerochronological records of environmental variability and bivalve growth in the Pacific Arctic Prog. Oceanogr. (IF 4.416) Pub Date : 2022-08-02 David J. Reynolds, Vanessa R. von Biela, Kenneth H. Dunton, David C. Douglas, Bryan A. Black
The Pacific Arctic region has experienced, and is projected to continue experiencing, rapid climate change. Large uncertainties exist in our understanding of the impact these physical changes have on the region’s ecology. This is, in part, due to the lack of long-term data. Here we investigate bivalve mollusc growth increment width chronologies (sclerochronologies) to develop a long-term biological
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Copepod community structure in the transition region of the North Pacific Ocean: Water mixing as a key driver of secondary production enhancement in subarctic and subtropical waters Prog. Oceanogr. (IF 4.416) Pub Date : 2022-08-06 Hiroomi Miyamoto, Kazutaka Takahashi, Hiroshi Kuroda, Tsuyoshi Watanabe, Yukiko Taniuchi, Akira Kuwata, Hiromi Kasai, Shigeho Kakehi, Taiki Fuji, Satoshi Suyama, Kazuaki Tadokoro
The North Pacific Ocean subtropical–subarctic gyre transition region is recognized as an important small pelagic fish nursery and feeding ground. To clarify the lower trophic level variability of the transition region pelagic ecosystem, we investigated the large-scale variation in copepod communities in relation to the oceanographic environment. We net sampled zooplankton in the upper 150 m from the
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Incoherent signatures of internal tides in the Tokara Strait modulated by the Kuroshio Prog. Oceanogr. (IF 4.416) Pub Date : 2022-07-29 Juntian Chen, Xiao-Hua Zhu, Min Wang, Hua Zheng, Ruixiang Zhao, Hirohiko Nakamura, Toru Yamashiro
Internal tides are ubiquitously generated from disturbances between barotropic tides and bottom topography in stratified oceans. Incoherence is routinely considered as non-stationary phase discrepancy between internal and astronomical tides. Internal tides, especially incoherent constituents, contribute substantial energy to dissipation and turbulent mixing. Using ∼8-month near-full-depth moored current
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Bottom-up processes drive reproductive success of Japanese anchovy in an oligotrophic sea: A case study in the central Seto Inland Sea, Japan Prog. Oceanogr. (IF 4.416) Pub Date : 2022-07-16 Michio Yoneda, Tatsunori Fujita, Masayuki Yamamoto, Kazuaki Tadokoro, Yuji Okazaki, Masahiro Nakamura, Masanori Takahashi, Naoaki Kono, Tadashi Matsubara, Katsuyuki Abo, Guo Xinyu, Naoki Yoshie
Anthropogenic and/or climate-driven changes in zooplankton dynamics may serve as a bottom-up regulator of productivity of small pelagic fish. In the central Seto Inland Sea of Japan, the abundance of the recruit fish of Japanese anchovy (Engraulis japonicus) has markedly declined in the last decade under oligotrophication. However, the link between the reproductive success of anchovy and environmental
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Long-term hydrographic changes in the Gulf of California and ecological impacts: A crack in the World’s Aquarium? Prog. Oceanogr. (IF 4.416) Pub Date : 2022-07-14 William Gilly, Unai Markaida, Patrick Daniel, Tim Frawley, Carlos Robinson, Jaime Gómez-Gutiérrez, Dylan Hyun, Jacob Soliman, Puneeta Pandey, Lorenzo Rosenzweig
Although the Gulf of California is widely recognized as a region of high productivity and biodiversity, recent oceanographic and ecological changes have had a significant impact on its overall health. We review the relevant history of the economically important fishery based on large Humboldt (jumbo flying) squid (Dosidicus gigas) (>50 cm mantle-length and 10 kg body weight) that existed in the Guaymas
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Does predation control the diapausing stock of Calanus finmarchicus in the Gulf of Maine? Prog. Oceanogr. (IF 4.416) Pub Date : 2022-07-19 P.H. Wiebe, M.F. Baumgartner, N.J. Copley, G.L. Lawson, C. Davis, R. Ji, C.H. Greene
The variability of zooplankton populations is controlled by external and internal forcing, with the former being principally large-scale changes in circulation, and the latter being driven by in situ growth, competition, and predation. Assessing the relative importance of these forcings is challenging and requires analyses of multifaceted observational data. As part of the U.S. GLOBEC Georges Bank
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Projecting environmental and krill fishery impacts on the Antarctic Peninsula food web in 2100 Prog. Oceanogr. (IF 4.416) Pub Date : 2022-07-19 G. Testa, S. Neira, R. Giesecke, A. Piñones
The Antarctic Peninsula ecosystem is extremely sensitive to climatic variability and other anthropogenic perturbances ascribed to biomass extraction by fisheries. An Ecopath with Ecosim model calibrated for the 1996–2012 period was projected into the future (2100) under three different climate projections for environmental variables (sea ice extent, open water area and chlorophyll-a concentration)
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Modelling the distribution of vulnerable skate from fisheries dependent data using imperfect detection Prog. Oceanogr. (IF 4.416) Pub Date : 2022-07-16 Amaëlle Bisch, Sophie A.M. Elliott, Alexandre Carpentier, Anthony Acou
Little is still known about the biology and ecology of many elasmobranchs which often inhibits species specific management measures from being implemented. The primary aim of this study was to improve the knowledge on the distribution and habitat use of the threatened and data deficient shagreen ray, Leucoraja fullonica, using fisheries dependent data. To model its distribution, we used Bayesian hierarchical
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Coupling oceanic mesoscale events with catches of the Pacific sardine (Sardinops sagax) in the Gulf of California Prog. Oceanogr. (IF 4.416) Pub Date : 2022-07-16 Edgardo B. Farach-Espinoza, Juana López-Martínez, Ricardo García-Morales, Manuel O. Nevárez-Martínez, Sofía Ortega-García, Daniel B. Lluch-Cota
Adult fish abundance depends on survival of early life stages, which are susceptible -among other factors- to environmental variability. Ocean mesoscale events (i.e. eddies, costal upwelling, thermal fronts, cold filaments) can be mechanisms of enrichment, concentration, retention and dispersal in marine environments with effects on survival of marine species early life stages. The Pacific sardine
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Distribution of phycotoxins in Última Esperanza Province during the PROFAN expedition 2019 Prog. Oceanogr. (IF 4.416) Pub Date : 2022-07-08 Kristof Möller, Marco Pinto-Torres, Jorge I. Mardones, Bernd Krock
Harmful Algae Blooms pose an increasing threat to the public health and economic stability of Southern Chile, particularly to the aquaculture industries. This fieldwork performed during the PROFAN expedition from 12th to 22nd November 2019 extends the knowledge on the distribution of marine toxin-producing species in the difficult to access Última Esperanza Province in the Magallanes Region. Paralytic
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Incoherence of the M2 and K1 internal tides radiated from the Luzon Strait under the influence of looping and leaping Kuroshio Prog. Oceanogr. (IF 4.416) Pub Date : 2022-07-08 Anzhou Cao, Zheng Guo, Shuya Wang, Xinyu Guo, Jinbao Song
The Kuroshio in different paths is considered to have different impacts on the generation, propagation and energetics of internal tides (ITs) originated from the Luzon Strait (LS). However, its influence on the incoherence of ITs remains unknown. Based on a regional model simultaneously simulating ITs and background circulations, this study examines the incoherence of the M2 and K1 ITs radiated from
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Size-fractioned zooplankton biomass in the Barents Sea: Spatial patterns and temporal variations during three decades of warming and strong fluctuations of the capelin stock (1989–2020) Prog. Oceanogr. (IF 4.416) Pub Date : 2022-07-12 Hein Rune Skjoldal, Elena Eriksen, Harald Gjøsæter
Zooplankton biomass has been monitored on joint Norwegian-Russian surveys in late summer and autumn since the 1980s. We report here on zooplankton biomass in three size fractions (<1, 1–2, and > 2 mm in screen mesh opening) obtained with WP-2 plankton net (180 μm mesh size) hauled vertically over the water column from near bottom to the surface for the period 1989–2020. The number of samples (stations)
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Spatial variation of bottom mixed layer in the South China Sea and a potential mechanism Prog. Oceanogr. (IF 4.416) Pub Date : 2022-07-11 Jianing Li, Qingxuan Yang, Hui Sun, Wei Zhao, Jiwei Tian
Based on 201 full depth profiles of temperature-salinity and velocity, we investigated the thickness, stratification and spatial variation of the bottom mixed layer in the South China Sea. The mean values of thickness and stratification N2 of the bottom mixed layer are about 154 m and 6.2 × 10-7 s−2, respectively, which is five times thicker and 100 times less stratified than the upper mixed layer
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Dissolved organic carbon and nitrogen cycling along the west Antarctic Peninsula during summer Prog. Oceanogr. (IF 4.416) Pub Date : 2022-07-09 Ribanna Dittrich, Sian F. Henley, Hugh W. Ducklow, Michael P. Meredith
The cycling of dissolved organic matter in the productive west Antarctic Peninsula (WAP) region is not well understood. For this study, dissolved organic carbon (DOC) and nitrogen (DON) concentrations and other biogeochemical measurements were collected along the WAP shelf during austral summer 2017. Concentrations of both DOC and DON in the upper ocean were lower than in lower latitudes (38.13–48
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Air-sea interaction processes during hurricane Sandy: Coupled WRF-FVCOM model simulations Prog. Oceanogr. (IF 4.416) Pub Date : 2022-07-09 Siqi Li, Changsheng Chen
A fully-coupled atmospheric-ocean model was developed by coupling WRF (Weather Research and Forecasting Model) with FVCOM (the unstructured-grid, Finite-Volume Community Ocean Model) through the Earth System Model Framework (ESMF). The coupled WRF-FVCOM is configured with either hydrostatic or non-hydrostatic oceanic dynamics and can run with wave-current interactions. We applied this model to simulate
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Distribution and abundance of leptocephali in the western South Pacific region during two large-scale sampling surveys Prog. Oceanogr. (IF 4.416) Pub Date : 2022-07-08 Michael J. Miller, Madoka Shimizu, Jun Aoyama, Shun Watanabe, Mari Kuroki, Eric Feunteun, Takatoshi Higuchi, Aya Takeuchi, Yu-San Han, Pierre Sasal, Christine Dupuy, Donald Jellyman, Robert Schabetsberger, Shingo Kimura, Noritaka Mochioka, Tsuguo Otake, Katsumi Tsukamoto
Although juvenile anguillid eels live in freshwater/estuarine habitats, and marine eels live in diverse ocean environments ranging from shallow-to-deep continental shelf areas and around islands to deep-benthic habitats and deeper meso- and bathy- pelagic zones, the larvae (leptocephali) of all species mix together in the ocean surface layer. All types of eel habitats are present in the western South
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Persistent zooplankton bioregions reflect long-term consistency of community composition and oceanographic drivers in the NE Pacific Prog. Oceanogr. (IF 4.416) Pub Date : 2022-06-30 Patrick R. Pata, Moira Galbraith, Kelly Young, Andrew R. Margolin, R. Ian Perry, Brian P.V. Hunt
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Recent nutrient enrichment and high biological productivity in the Labrador Sea is tied to enhanced winter convection Prog. Oceanogr. (IF 4.416) Pub Date : 2022-06-22 Jan-Erik Tesdal, Hugh W. Ducklow, Joaquim I. Goes, Igor Yashayaev
The Labrador Sea is known for strong surface heat losses and deep ocean ventilation in the wintertime as well as high biological productivity and carbon export associated with extensive spring blooms. Using satellite-derived estimates of chlorophyll-a and net primary productivity, this study documents that the Labrador Sea has recently become more productive, evident in the form of more intense and
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Recruitment variability of fish stocks in the Barents Sea: Spatial and temporal variation in 0-group fish length of six commercial species during recent decades of warming (1980–2017) Prog. Oceanogr. (IF 4.416) Pub Date : 2022-06-16 Hein Rune Skjoldal, Elena Eriksen, Harald Gjøsæter, Øystein Skagseth, Dmitry Prozorkevich, Vidar S. Lien
Young-of-the-year (0-group) fish in the Barents Sea have been investigated in an annual joint Norwegian-Russian pelagic trawl survey in autumn, using a standardized procedure since 1980. We use a conceptual framework of ‘upstream’ spawning areas and ‘downstream’ nursery areas, recorded as 0-group distribution in the Barents Sea, to address spatial (geographical) and temporal (1980–2017) variation in
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Biological dipole mode indices: New parameters to characterize the physical and biological processes of the Indian Ocean Dipole event Prog. Oceanogr. (IF 4.416) Pub Date : 2022-06-21 Wei Shi, Menghua Wang
The Indian Ocean Dipole (IOD) is a basin-wide ocean–atmosphere phenomenon that has profound impacts on the global climate, land, and ocean. The Dipole Mode Index (DMI), which is defined as the difference of the sea surface temperature (SST) anomaly in the east IOD zone and the west IOD zone has long been used to characterize and quantify the strength of IOD events. In this study, we propose biological
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Rapid vulnerability assessment of Pacific sardine (Sardinops sagax) fisheries facing climate change in Mexico Prog. Oceanogr. (IF 4.416) Pub Date : 2022-06-13 Miguel Ángel Ojeda-Ruiz, David Petatán-Ramírez, Triana Guerrero-Izquierdo, Christian Salvadeo
The Pacific sardine fishery is the most important in terms of catch volume in Mexico. Due to their trophic position, small pelagic fishes respond rapidly and abruptly to ocean climate variability at interannual (ENSO) and decadal time scales (PDO), which is why their response to climate change is expected. The present study applied the Rapid Vulnerability Assessment (RVA) designed for Natural Protected
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The 2015 exceptional swell in the Southern Pacific: Generation, advection, forecast and implied extremes Prog. Oceanogr. (IF 4.416) Pub Date : 2022-06-16 L. Cavaleri, A. Benetazzo, L. Bertotti, J.-R. Bidlot, A. Pomaro, J. Portilla-Yandun
A very severe storm in the Antarctic belt is analysed that sent a very large swell throughout the South-Pacific Ocean. The reasons for the storm were a deep depression passing over an anomalous warm sea area, with consequent increased intensity, more active wind input, gustiness, with also dynamical generation. Wind and wave model results are verified with scatterometer and altimeter data. We follow
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Acoustic detection of the Greenland shark (Somniosus microcephalus) using multifrequency split beam echosounder in Svalbard waters Prog. Oceanogr. (IF 4.416) Pub Date : 2022-06-15 Egil Ona, Julius Nielsen
The conservation status of the long-lived Greenland shark (Somniosus microcephalus) is unknown, and methods for non-invasively estimating local or regional abundances are wanted. Using a multifrequency split beam echosounder during long line fishery for Greenland sharks, we demonstrate how individual sharks can be identified and separated with high accuracy from the acoustic backscattering at three
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Near-inertial waves in an Arctic fjord and their impact on vertical mixing of Atlantic water mass Prog. Oceanogr. (IF 4.416) Pub Date : 2022-06-14 Subeesh M.P., Divya David T., Ravichandran M., Sourav Chatterjee, Ankit Pramanik, M. Nuncio
With increase in the Arctic warming, fjords in the region are undergoing significant decline in sea-ice, increase in glacier retreat, and changes in primary productivity. Warm and saline Atlantic water (AW) advected from the open ocean is attributed as one of the primary reasons for these changes. Vertical mixing of the subsurface AW with the cold surface Arctic water positively feeds many of these
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Warming and marine heatwaves tropicalize rocky reefs communities in the Gulf of California Prog. Oceanogr. (IF 4.416) Pub Date : 2022-06-11 Fabio Favoretto, Carlos Sánchez, Octavio Aburto-Oropeza
Globally, marine communities are experiencing gradual warming and extreme heatwaves causing species to shift in geographic range. As a result, the biological assemblages outside tropical latitudes are being reorganized or “tropicalized” as warm-affinity species become increasingly dominant and cool water species recede, with impacts on our economies, food supply, and health. In the Gulf of California
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A high-resolution time series of particulate matter fatty acids reveals temporal dynamics of the composition and quality available to zooplankton in a temperate coastal ocean Prog. Oceanogr. (IF 4.416) Pub Date : 2022-06-10 Anna K. McLaskey, Ian Forster, Justin Del Bel Belluz, Brian P.V. Hunt
Particulate organic matter (POM) forms the base of the pelagic food web, but is a complex category of material that undergoes substantial changes in quantity and quality across different time scales. As the primary consumers of POM, zooplankton are influenced by these fluctuations, resulting in shifts in the food web pathways that contribute to the production of higher trophic levels. We measured POM
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Oxygen minimum zone copepods in the Arabian Sea and the Bay of Bengal: Their adaptations and status Prog. Oceanogr. (IF 4.416) Pub Date : 2022-06-06 V. Vidhya, R. Jyothibabu, L. Jagadeesan, C. Rashid, K.T. Alok, N. Arunpandi, R. Thirumurugan
The Arabian Sea and the Bay of Bengal are cul-de-sacs of the northern Indian Ocean, and they contain more than half of the world's Oxygen Minimum Zones (OMZs). The current study reviews the vast and advancing literature on the oceanographic settings that lead to distinct OMZs in the Arabian Sea and the Bay of Bengal and links them with the copepods thriving there, their status, and likely adaptations
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Anomalously low diatom fluxes during 2009–2010 at Alfonso Basin, Gulf of California Prog. Oceanogr. (IF 4.416) Pub Date : 2022-06-06 Juan David Acevedo-Acosta, Aída Martínez-López
A long-term information baseline is necessary to identify the seasonal and interannual variability of diatom production driven by environmental dynamics. This motivated our compiling hydrographic data and concurrent diatom fluxes at the Alfonso Basin sub-zone. The diatom data time series spanned from February 2008 to September 2012. These data were analyzed along with primary productivity and chlorophyll-a
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Characterization of intraseasonal fluctuations in the abyssal South China Sea: An insight into the energy pathway Prog. Oceanogr. (IF 4.416) Pub Date : 2022-06-01 Qi Quan, Zhiqiang Liu, Yang Yang, Zhongya Cai, Han Zhang, Xiaohui Liu
Energetics of the abyssal ocean account greatly for the redistribution and dissipation of global oceanic energy. In this study, we characterize the intraseasonal fluctuations in the deep South China Sea (SCS) and evaluate the relevant energy budget using observations and numerical simulations. The results indicate substantial geographical inhomogeneity in the intraseasonal energy reservoir. The high-energy
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Effects of Marine Heatwaves (MHW) and Cold Spells (MCS) on the surface warming of the Mediterranean Sea from 1989 to 2018 Prog. Oceanogr. (IF 4.416) Pub Date : 2022-05-28 Achille Carlo Ciappa
Marine Heatwaves (MHW) and Cold Spells (MCS) in the Mediterranean Sea have been extracted from an SST dataset from which the annual warming trend had been removed. The number of events per year (max 6) and their intensity resulted stable, indicating that the increasing occurrence of actual MHW in the last decades is mainly due to the warming rate. The extent (daily mean around 10% of the basin surface)
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Severe winter conditions improve recruitment success of blue whiting (Micromesistius poutassou), a temperate water fish species, in the NW Mediterranean sea Prog. Oceanogr. (IF 4.416) Pub Date : 2022-05-27 Joan Mir-Arguimbau, M.Mar Flexas, Jordi Salat, Paloma Martín, Marc Balcells, Nuria Raventós, Ana Sabatés
Fish recruitment variability results from a complex mix of biological and physical processes, and their interactions, acting in the early life stages. In this study, we aim to investigate the environmental factors driving the recruitment success of blue whiting (Micromesistius poutassou) in the NW Mediterranean through reconstruction of early life history traits derived from otoliths microstructure
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Temporal variability of satellite chlorophyll-a as an ecological resilience indicator in the central region of the Gulf of California Prog. Oceanogr. (IF 4.416) Pub Date : 2022-05-23 Cristian Hakspiel-Segura, Aída Martínez-López, Juan Antonio Delgado-Contreras, Carlos J. Robinson, Jaime Gómez-Gutiérrez
Multiple publications over the past decades argue that the Gulf of California is a region with high biological diversity and productivity. However, ecosystem resilience to climate disturbances and anthropogenic stressors in the Gulf of California remains poorly explored. One method to assess ecosystem resilience based on ecological indicators is the analysis of continuous records of critical environmental
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New deep-water Bryozoa from the Magellan Seamounts, tropical western Pacific, with a global review of bryozoans associated with ferromanganese crusts Prog. Oceanogr. (IF 4.416) Pub Date : 2022-05-27 Andrei V. Grischenko
The sessile benthic fauna on ferromanganese (Fe-Mn) crusts is poorly known, with many groups of invertebrates still barely examined. Collections made during Yuzhmorgeologiya expeditions on RV Gelendzhik in October 2016 (YMG 6–16) and October 2020 (YMG 6–19) to the Magellan Seamounts, tropical western Pacific, have yielded two new species and a new genus of cheilostome bryozoans. These are Allantocallopora
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Incorporating tides and internal gravity waves within global ocean general circulation models: A review Prog. Oceanogr. (IF 4.416) Pub Date : 2022-05-27 Brian K. Arbic
Until recently, high-resolution global modeling of tides has been done separately from high-resolution global modeling of the atmospherically-forced oceanic general circulation. Here we review the emerging class of high-resolution global models that are simultaneously forced by both atmospheric fields and the astronomical tidal potential. Such models simulate barotropic (surface) tides, internal tides
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Planktonic protist diversity across contrasting Subtropical and Subantarctic waters of the southwest Pacific Prog. Oceanogr. (IF 4.416) Pub Date : 2022-05-25 Andres Gutiérrez-Rodríguez, Adriana Lopes dos Santos, Karl Safi, Ian Probert, Fabrice Not, Denise Fernández, Priscillia Gourvil, Jaret Bilewitch, Debbie Hulston, Matt Pinkerton, Scott D. Nodder
Planktonic protists are an essential component of marine pelagic ecosystems where they mediate important trophic and biogeochemical functions. Although these functions are largely influenced by their taxonomic affiliation, the composition and spatial variability of planktonic protist communities remain poorly characterized in vast areas of the ocean. Here, we investigated the diversity of these communities
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Internal wave breaking near the foot of a steep East-Pacific continental slope Prog. Oceanogr. (IF 4.416) Pub Date : 2022-05-19 Hans van Haren, Gunnar Voet, Matthew H. Alford, Daniel J. Torres
The sloping sides of ocean basins are of particular interest for their potential importance for considerable turbulence generation via internal wave breaking and associated water circulation. The difference with the ocean interior may be manifest in a 10–100 m relatively thin layer above the seafloor. We set up an observational study with high-resolution stand-alone instrumentation attached to a custom-made
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Evaluating the influence of environmental factors on the early life history growth of chub mackerel (Scomber japonicus) using a growth and migration model Prog. Oceanogr. (IF 4.416) Pub Date : 2022-05-22 Chenying Guo, Shin-ichi Ito, Yasuhiro Kamimura, Peng Xiu
Chub mackerel is one of the most important fisheries target species worldwide. These fish have large fluctuations in biomass, the mechanism of which remains unclear. This study developed a bioenergetics individual-based model for chub mackerel distributed in the Northwest Pacific and evaluated the dominant environmental factors that affect their early life history. The parameters in the bioenergetics
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Decline and recovery of pelagic acoustic backscatter following El Niño events in the Gulf of California, Mexico Prog. Oceanogr. (IF 4.416) Pub Date : 2022-05-21 Elan J. Portner, Kelly J. Benoit-Bird, Elliott L. Hazen, Chad M. Waluk, Carlos J. Robinson, Jaime Gómez-Gutiérrez, William F. Gilly
Climatic variability exerts enormous pressures on the structure and function of open ocean ecosystems. Although the responses of primary producers and top predators to these pressures are being increasingly well-documented, little is known about how midtrophic communities respond to oceanographic and climatic variability. We address this knowledge gap through a study of the effects of El Niño Southern
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Deep ocean prokaryotes and fluorescent dissolved organic matter reflect the history of the water masses across the Atlantic Ocean Prog. Oceanogr. (IF 4.416) Pub Date : 2022-05-21 Markel Gómez-Letona, Javier Arístegui, Nauzet Hernández-Hernández, Xosé Antón Álvarez-Salgado, Marta Álvarez, Erick Delgadillo, María Pérez-Lorenzo, Eva Teira, Santiago Hernández-León, Marta Sebastián
Organic matter is known to influence community composition and metabolism of marine prokaryotes. However, few studies have addressed this linkage in the deep ocean. We studied the relationship between fluorescent dissolved organic matter and prokaryotic community composition in meso- and bathypelagic water masses along a surface productivity gradient crossing the subtropical and tropical Atlantic Ocean
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On the north equatorial current spatiotemporal modes and responses in the western boundary currents Prog. Oceanogr. (IF 4.416) Pub Date : 2022-05-20 Junlu Li, Jianping Gan
The North Equatorial Current (NEC) and western boundary currents (WBCs) of the Kuroshio Current (KC) and the Mindanao Current (MC) characterize the circulation pattern and water mass transports in the tropical western North Pacific. We utilized the validated three-dimensional and time-dependent China Sea Multi-scale Ocean Modeling System to investigate the variability of the WBCs and the physical processes
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Global ecological and biogeochemical impacts of pelagic tunicates Prog. Oceanogr. (IF 4.416) Pub Date : 2022-05-19 Jessica Y. Luo, Charles A. Stock, Natasha Henschke, John P. Dunne, Todd D. O'Brien
The pelagic tunicates, gelatinous zooplankton that include salps, doliolids, and appendicularians, are filter feeding grazers thought to produce a significant amount of particulate organic carbon (POC) detritus. However, traditional sampling methods (i.e., nets), have historically underestimated their abundance, yielding an overall underappreciation of their global biomass and contribution to ocean
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Geographic patterns of soft-bottoms benthic communities in Chilean Patagonian fjords (47°S-54°S) - influence of environmental stress on diversity patterns and stable isotope signatures Prog. Oceanogr. (IF 4.416) Pub Date : 2022-05-06 Eduardo Quiroga, Paula Ortiz, Eulogio H. Soto, Nicole Salinas, Nicole Olguín, Chester Sands
The benthic community in the Chilean Patagonia is as rich and highly diverse as the spatial variation of its habitats and food sources. Environmental stress from glacier melt and river discharge are known drivers of benthic community dynamics. Here, we analyze longitudinal patterns of soft-bottom benthic communities across transects of glacier-marine environments and how these habitats may respond
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Annual cycle of phytoplankton, protozoa and diatom species from Scotia Bay (South Orkney Islands, Antarctica): Community structure prior to, during and after an anomalously low sea ice year Prog. Oceanogr. (IF 4.416) Pub Date : 2022-04-28 Noelia L. Trifoglio, Héctor F. Olguín Salinas, Claudio A. Franzosi, Viviana A. Alder
Deepening the knowledge on Antarctic coastal plankton and its links with environmental conditions is essential to understand the role of these organisms in the carbon and energy flow, and to detect and predict impacts of climate change. This study addresses for the first time the seasonal succession (February 2016 to April 2017) of the phytoplanktonic and protozoan communities of Scotia Bay (Laurie
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Winter microalgal communities of the southern Sea of Okhotsk: A comparison of sea ice, coastal, and basinal seawater Prog. Oceanogr. (IF 4.416) Pub Date : 2022-04-28 Dong Yan, Jun Nishioka, Takenobu Toyota, Koji Suzuki
The Sea of Okhotsk is a marginal sea of the western North Pacific Ocean and a key region for the seawater circulation of the North Pacific. In winter, a large amount of sea ice forms over the northern shelf and off the eastern Sakhalin coast. The sea ice is transported to the southern part of the sea by the fresh and cold East Sakhalin Current (ESC). Microalgae are the main players in the primary production
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Synchronized decadal variabilities in the Kuroshio and Kuroshio Extension system Prog. Oceanogr. (IF 4.416) Pub Date : 2022-04-28 Yu-Xiang Qiao, Hirohiko Nakamura, Shinichiro Kako, Ayako Nishina, Tomohiko Tomita
Using satellite altimetry and wind stress data, the spatially coherent decadal variabilities in current intensity and current path during 1993–2018 were investigated for a western boundary current system, namely, the Kuroshio from the east of Luzon Island to the south of Japan and the Kuroshio Extension (KE). Analyses based on Hovmöller diagrams showing decadal variabilities along the entire current
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Seasonality and trend of the global upper-ocean vertical velocity over 1998–2017 Prog. Oceanogr. (IF 4.416) Pub Date : 2022-04-21 Fanglou Liao, Guandong Gao, Peng Zhan, Yan Wang
The ocean vertical circulation has been historically underappreciated compared to the lateral circulation, largely due to the poor availability of the ocean vertical-velocity information. With the advent of high-performance ocean models, especially those constrained by the most available observations, it is now possible and incentive to dig into the vertical branch of ocean circulation. In this study
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Basin-scale distribution of salps and doliolids in the transition region of the North Pacific Ocean in summer: Drivers of bloom occurrence and effect on the pelagic ecosystem Prog. Oceanogr. (IF 4.416) Pub Date : 2022-04-15 Nurul Huda Ahmad Ishak, Kentaro Motoki, Hiroomi Miyamoto, Taiki Fuji, Yukiko Taniuchi, Shigeho Kakehi, Hiroshi Kuroda, Takashi Setou, Kazutaka Takahashi
The large-scale distribution of thaliaceans in relation to environmental variables was investigated over 4500 km in the transition region of the North Pacific (36°N–43.6° N, 141.5° E–164.5° W) in the summer of 2016–2019. Three main patterns occurred in the thaliacean bloom formations with specific and annual variabilities. Thalia democratica, the most dominant thaliacean species in this region, formed
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Variability in structure and carbon content of plankton communities in autumn in the waters south-west of the UK Prog. Oceanogr. (IF 4.416) Pub Date : 2022-04-20 Elisa Capuzzo, Serena Wright, Paul Bouch, Kate Collingridge, Veronique Creach, Sophie Pitois, David Stephens, Jeroen van der Kooij
The size, type and abundance of planktonic organisms influence the efficiency with which carbon is transferred through the lower trophic levels, ultimately affecting dynamics at the higher trophic levels of the marine food web. In temperate shelf sea, such as the waters south-west of the UK, the plankton growing season span from early spring to autumn. While the plankton spring bloom has been extensively
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Greater resilience of reef fish assemblages in a no-take reserve compared to multi-use areas of the Gulf of California Prog. Oceanogr. (IF 4.416) Pub Date : 2022-04-12 Georgina Ramírez-Ortiz, Eduardo F. Balart, Héctor Reyes-Bonilla, Leonardo Huato-Soberanis, Christian Cortés-Fuentes, Fiorenza Micheli
Conservation strategies, such as the establishment of Marine Protected Areas (MPAs), aim to safeguard biodiversity and to promote resilience of ecosystems by increasing their capacity to maintain key functions and processes following disturbance. However, the extent to which ecosystems in MPAs exhibit resilience remains debated. To address this question, we evaluated changes in reef fish species and
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Temporal dynamics of total microbial biomass and particulate detritus at Station ALOHA Prog. Oceanogr. (IF 4.416) Pub Date : 2022-04-16 David M. Karl, Karin M. Björkman, Matthew J. Church, Lance A. Fujieki, Eric M. Grabowski, Ricardo M. Letelier
Particulate adenosine-5′-triphosphate (P-ATP) and particulate carbon (PC) concentrations were measured on approximately monthly intervals throughout the upper water column (0–1000 m) over a 30-yr (1989–2018) period at Station ALOHA to track the seasonal-to-decadal variability in total microbial biomass and the dynamics of living-to-nonliving particulate organic matter pools. On selected cruises, samples
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Seasonal circulation and volume transport of the Bransfield Current Prog. Oceanogr. (IF 4.416) Pub Date : 2022-04-15 Marta Veny, Borja Aguiar-González, Ángeles Marrero-Díaz, Ángel Rodríguez-Santana
We present the first observational-based assessment of the seasonal circulation and volume transport driven by the Bransfield Current (BC), a surface-intensified coastal jet which flows northeastward along the southern slope of the South Shetland Islands (SSI) in the Bransfield Strait (BS). To this aim, we construct a seasonal climatology based on an extensive dataset of direct velocity measurements
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Marine life at Lagrangian fronts Prog. Oceanogr. (IF 4.416) Pub Date : 2022-04-12 S.V. Prants
Many ocean fronts are known to feature enhanced primary and secondary production and elevated biodiversity. The confluence of water masses on strong fronts promotes concentration of plankters (phytoplankton and small zooplankton) contributing to creation of oases in the oceanic desert for marine habitants, from small pelagic fish and turtles to seabirds and apex (top) predators. This article is a concise
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Benthic transition zones in the Atlantic gateway to a changing Arctic ocean Prog. Oceanogr. (IF 4.416) Pub Date : 2022-04-06 Lis L. Jørgensen, Laurene Pecuchet, Randi B. Ingvaldsen, Raul Primicerio
The biogeographic transition from boreal to Arctic marine communities entails a strong taxonomic and functional turnover. Communities living in these areas are being strongly affected by climate warming with rapid reorganizations and change in ecosystem functioning. We assess the megabenthic species composition and functional character in a transition zone around Svalbard. The relationships between
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Carbon remineralization by small mesopelagic and bathypelagic Stomiiforms in the Northeast Atlantic Ocean Prog. Oceanogr. (IF 4.416) Pub Date : 2022-04-06 Airam N. Sarmiento-Lezcano, M. Pilar Olivar, Marian Peña, José M. Landeira, Laia Armengol, Ione Medina-Suárez, Arturo Castellón, Santiago Hernández-León
The organic carbon resulting from photosynthesis in the upper ocean is transferred downward through the passive sinking of organic particles, physical mixing of particulate and dissolved organic carbon as well as active flux transported by zooplanktonic and micronektonic migrants. Several meso- and bathypelagic organisms feed in shallower layers during the nighttime and respire, defecate, excrete and
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Phytoplankton diversity emerging from chromatic adaptation and competition for light Prog. Oceanogr. (IF 4.416) Pub Date : 2022-04-04 Eva Álvarez, Paolo Lazzari, Gianpiero Cossarini
The phytoplankton absorption cross-section is a fundamental quantity in biogeochemical ocean models that alters the underwater spectral light field and the photosynthetic response of phytoplankton. Phytoplankton taxa are characterized by absorption spectra with defined absorption bands in the visible region of the light spectrum that govern the capability of different taxa of phytoplankton to exploit
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Contrasted spatio-temporal changes in the demersal fish assemblages and the dominance of the environment vs fishing pressure, in the Bay of Biscay and Celtic Sea Prog. Oceanogr. (IF 4.416) Pub Date : 2022-04-04 David Eme, Marta M. Rufino, Verena M. Trenkel, Youen Vermard, Pascal Laffargue, Pierre Petitgas, Loïc Pellissier, Camille Albouy
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Long-term monitoring reveals unprecedented stability of a vent mussel assemblage on the Mid-Atlantic Ridge Prog. Oceanogr. (IF 4.416) Pub Date : 2022-04-04 Loïc Van Audenhaege, Marjolaine Matabos, Anik Brind'Amour, Jonathan Drugmand, Agathe Laës-Huon, Pierre-Marie Sarradin, Jozée Sarrazin
Understanding scales and drivers of ecological variability is essential to a full understanding of ecosystem functioning. At remote deep-sea hydrothermal vents, infra-annual dynamics remain poorly described. This study aims to characterise the factors that drive the dynamics of a vent faunal assemblage dominated by Bathymodiolus azoricus mussels from infra-daily to monthly time steps. We analysed a