-
Seabird assemblages are linked to the major western boundary current off eastern Australia Prog. Oceanogr. (IF 4.1) Pub Date : 2024-03-04 Nicholas W. Daudt, Eric J. Woehler, Matthew R. Schofield, Robert O. Smith, Leandro Bugoni, William J. Rayment
Identifying species assemblages helps understand the relationship between organisms and their environment. Assemblages can be used to predict biological changes caused by environmental perturbations, and are thus essential surrogates to monitor biodiversity. In this study, to identify and describe seabird assemblages, we used 15 at-sea ship-based survey data sets collected over 37°of latitude off eastern
-
Consumer isoscapes reveal heterogeneous food webs in deep-sea submarine canyons and adjacent slopes Prog. Oceanogr. (IF 4.1) Pub Date : 2024-02-28 Amanda W.J. Demopoulos, Brian J. Smith, Jill R. Bourque, Jason D. Chaytor, Jennifer McClain-Counts, Nancy Prouty, Steve W. Ross, Sandra Brooke, Gerard Duineveld, Furu Mienis
The deep sea is the largest biome on earth, but one of the least studied despite its critical role in global carbon cycling and climate buffering. Deep-sea organisms largely rely on particulate organic matter from the surface ocean for energy – these organisms in turn play critical roles in energy transport, transformation, storage, and sequestration of carbon. Within the deep sea, submarine canyons
-
Towards eDNA informed biodiversity studies – Comparing water derived molecular taxa with traditional survey methods Prog. Oceanogr. (IF 4.1) Pub Date : 2024-02-27 Jon-Ivar Westgaard, Kim Præbel, Per Arneberg, Brian P. Ulaski, Randi Ingvaldsen, Owen S. Wangensteen, Torild Johansen
Managing natural resources in a sustainable manner requires understanding the complexity of ecosystems and the species that are associated with the different parts of the ecosystem. Much of this knowledge is derived from traditional sampling methods (e.g., different types of trawls). The analysis of environmental DNA (eDNA) can provide increased knowledge, complementary to the traditional methods.
-
Offshore high chlorophyll eddies: Separating upwelling from nearshore migration from ocean color remote sensing Prog. Oceanogr. (IF 4.1) Pub Date : 2024-02-27 Qing Zhu, Zhongping Lee
Offshore eddies are often associated with high amounts of phytoplankton (represented by the chlorophyll-a concentration (Chla)), or, phytoplankton blooms, which can be detected from ocean color satellites. The phytoplankton “blooms” in these eddies are commonly explained as a result of enhanced nutrients - local growth - brought up from deeper waters by these eddies, although potentially they could
-
Subsurface eddies east of the Philippines: Geographic characteristics, vertical structures, volume and thermohaline transport Prog. Oceanogr. (IF 4.1) Pub Date : 2024-02-23 Linlin Zhang, Weiqi Song, Yuchao Hui, Zhenxiao Wang, Dunxin Hu
Energetic subsurface eddies (SSEs) play a significant role in regulating the subthermocline circulation east of the Philippines. However, due to the paucity of targeted observations, they remain largely unexplored. By analyzing the outputs from an eddy-resolving ocean general circulation model (OGCM), this study investigated the statistics of SSEs east of the Philippines, including their geographic
-
Subsurface evolution of three types of surface marine heatwaves over the East Sea (Japan Sea) Prog. Oceanogr. (IF 4.1) Pub Date : 2024-02-20 J.S. Saranya, SungHyun Nam
Extremely high seawater temperatures (beyond the 90th percentile threshold) are a key characteristic of marine heatwaves (MHWs), which adversely affect human and marine ecosystems. It is important to characterize the MHWs in the East Sea (Japan Sea), a semi-enclosed deep basin connected to the outside seas/ocean by shallow and narrow straits, where the most rapid upper ocean warming has been reported
-
The California current system off Baja California Sur Prog. Oceanogr. (IF 4.1) Pub Date : 2024-02-20 Brandon López-Aviles, Emilio Beier, Rodrigo Duran, José Gómez-Valdés, Rubén Castro, Laura Sánchez-Velasco
Based on hydrographic data from two cruises (June 2010 and May 2012) off Baja California Sur, Mexico, historical measurements from the World Ocean Database 2018, California Cooperative Oceanic Fisheries Investigations, and Investigaciones Mexicanas de la Corriente de California cruise programs, as well as satellite images and data from the Global Reanalysis, this study describes the California Current
-
Biotic transformation of methylmercury at the onset of the Arctic spring bloom Prog. Oceanogr. (IF 4.1) Pub Date : 2024-02-18 Stephen G. Kohler, Lars-Eric Heimbürger-Boavida, Philipp Assmy, Oliver Müller, Stefan Thiele, Maria G. Digernes, Kuria Ndungu, Murat V. Ardelan
[Display omitted]
-
Semidiurnal Internal Tides in a Shelf Sea South of Japan: Characteristics, Energetics, and Temporal variations Prog. Oceanogr. (IF 4.1) Pub Date : 2024-02-17 Shuya Wang, Xinyu Guo, Akihiko Morimoto, Anzhou Cao, Eisuke Tsutsumi, Yasumasa Miyazawa, Sergey M. Varlamov
Tidal mixing in a shelf sea south of Japan (Bungo Channel) plays an important role in modulating the water exchange between the Seto Inland Sea and Pacific Ocean. In this study, based on moored observations and model results from the Japan Coastal Ocean Predictability Experiment—Tides (JCOPE-T), the generation, propagation, and dissipation of semidiurnal internal tides in the Bungo Channel are investigated
-
Analysis of vortex merging from a rotating tank laboratory experiment Prog. Oceanogr. (IF 4.1) Pub Date : 2024-02-16 Minghan Fu, Guoqing Han, Xiaojie Lu, Wenjin Sun, Joel Sommeria, Alexandre Stegner, Rui M.A. Caldeira, Changming Dong
Oceanic vortex merging is an important physical process for the vortex evolution and its impact on marine environment. However, limitation of the in-situ oceanic observational data of vortex merging inhabits its better understanding. This study investigates the interactions between non-ideal vortices in a four-vortex flow field in a rotating tank. We examine the merging stages of anticyclonic vortices
-
Microeukaryotes have unexpected importance in cold seep food webs through predation and parasitism Prog. Oceanogr. (IF 4.1) Pub Date : 2024-02-13 Longzhao Li, Feng Zhao, Sabine Filker, Weiyue Liu, Rongjie Zhao, Yuanyuan Wan, Kuidong Xu
[Display omitted]
-
-
Improving coral monitoring by reducing variability and bias in cover estimates from seabed images Prog. Oceanogr. (IF 4.1) Pub Date : 2024-02-06 Emma J. Curtis, Jennifer M. Durden, Brian J. Bett, Veerle A.I. Huvenne, Nils Piechaud, Jenny Walker, James Albrecht, Miquel Massot-Campos, Takaki Yamada, Adrian Bodenmann, Jose Cappelletto, James A. Strong, Blair Thornton
Seabed cover of organisms is an established metric for assessing the status of many vulnerable marine ecosystems. When deriving cover estimates from seafloor imagery, a source of uncertainty in capturing the true distribution of organisms is introduced by the inherent variability and bias of the annotation method used to extract ecological data. We investigated variability and bias in two common annotation
-
A review of the Indian Ocean carbon dynamics, acidity, and productivity in a changing environment Prog. Oceanogr. (IF 4.1) Pub Date : 2024-01-29 Jayashree Ghosh, Kunal Chakraborty, Vinu Valsala, Trishneeta Bhattacharya, Prasanna Kanti Ghoshal
The Indian Ocean dynamics is governed by the seasonal reversal of monsoon winds and the associated ocean currents. The relatively deep thermocline along the equator due to a lack of steady easterlies, low-latitude connection to the neighbouring Pacific, and a lack of northward heat export due to the position of the Asian continent are important factors in regulating the ocean state. These features
-
Modular ocean trace elements sampling for the international GEOTRACES studies – Evidence from analysis of dissolved Fe and Pb Prog. Oceanogr. (IF 4.1) Pub Date : 2024-02-03 J. Zhang, Z.T. Ni, J.L. Ren, F. Yu, X.Y. Diao, Y. Wang, S.J. Zhang, H. Su, S.L. Cong, Z.J. Lu, S. Jiang, J. Ou, Y. Chen, Q. Wang, Z.B. Zhang, J.T. Ai, C.B. Wang, Z.D. Tao
A new modular system was reported in this paper for the purpose of sampling and processing of trace elements in the open ocean. The idea of designing is based on the concept of assembly and combination, which is so called “Modular Ocean Trace Elements Sampling” (MOTES). In application, the system is tested during a cruise in the Subtropical Pacific Ocean between 140° E to 142° E, and between 6° N and
-
Atlantic versus Mediterranean deep scattering layers around the Iberian peninsula Prog. Oceanogr. (IF 4.1) Pub Date : 2024-01-29 Marian Peña
Deep scattering layers (DSLs) play an important role in pelagic food webs, and are inhabited by the world’s most abundant invertebrates. Recent research has begun to reveal latitudinal, longitudinal and bathymetric patterns that overturn the original belief in homogeneous horizontal layers. The Strait of Gibraltar represents one of the most important oceanic gateways in the world and is a key place
-
Characteristics of mesoscale eddies and their evolution in the north Indian ocean Prog. Oceanogr. (IF 4.1) Pub Date : 2024-02-02 Shiva Shankar Manche, Rabindra K. Nayak, Rajesh Sikhakolli, Rajashree V. Bothale, Prakash Chauhan
Mesoscale eddies are ubiquitous in the oceans and play a significant role in setting the turbulence, transporting momentum, heat, salinity, and nutrients from their formation site to the place of dissipation, and controlling biogeochemical processes and air-sea exchanges. Using satellite-measured daily sea level anomaly from 1993 to 2021, we studied statistical characteristics of mesoscale eddies in
-
How membrane fatty acids influence sardine size across diverse marine environments Prog. Oceanogr. (IF 4.1) Pub Date : 2024-02-01 Margaux Mathieu-Resuge, Pablo Brosset, Fany Sardenne, Philippe Soudant, Fabienne Le Grand, Quentin Schull, Christophe Lebigre
Differences in diet quality and quantity may influence trophodynamic processes in small pelagic fish. Yet, we currently lack direct and comprehensive information on how large-scale areas differ in dietary resources and the degree to which these differences influence fish physiological performances (i.e., growth), ultimately influencing entire fish stocks. Fatty acid composition is one of the bioindicator
-
The effects of seasonal wind regimes on the evolution of hypoxia in Chesapeake Bay: Results from a terrestrial-estuarine-ocean biogeochemical modeling system Prog. Oceanogr. (IF 4.1) Pub Date : 2024-01-24 Youchang Zheng, Jingwen Huang, Yang Feng, Huijie Xue, Xiaohui Xie, Hanqin Tian, Yuanzhi Yao, Lin Luo, Xianghui Guo, Yonglin Liu
In this study, a terrestrial-estuarine-ocean biogeochemical modeling system (DLEM-ChesROMS-ECB) was used to investigate the impact of prevailing spring-to-summer winds on hypoxia in Chesapeake Bay. The modeling system was run continuously from 1985 to 2005 under realistic wind conditions. Correlation analysis based on the 21-year simulation results revealed that the durations of spring northeasterly
-
Estimating spatial variability of baseline isoscapes from fish isotopic signatures at the community level Prog. Oceanogr. (IF 4.1) Pub Date : 2024-01-22 J.J. Ortiz, I. Preciado, M. Hidalgo, J.M. González-Irusta, I.M. Rabanal, L. López-López
One of the main limitations in the application of stable isotopes to marine trophic ecology is obtaining a reliable baseline upon which to calculate isotopic enrichment. Isotopic baselines are variable in space and time, influenced by several environmental factors such as terrestrial runoff, oceanic currents or primary production, and thus, investigating their patterns of variability is essential to
-
Spatial and temporal variations in the micronutrient Fe across the Peruvian shelf from 1984-2017 Prog. Oceanogr. (IF 4.1) Pub Date : 2024-01-17 Yuanyuan Gu, Mark James Hopwood, Martha Gledhill, Insa Rapp, Kathrin Wuttig, Eric Pieter Achterberg
High dissolved iron (dFe) concentrations of the order of 10-100 nmol L-1 are a feature of waters influenced by sedimentary inputs in oxygen minimum zones (OMZ). However, the temporal development of dFe concentrations is poorly defined due to a general reliance on snapshot cross-shelf sections to study marine trace metal dynamics. Multiple cruise campaigns since the 1980s have investigated Fe dynamics
-
A time-average ocean: Thermal wind and flow spirals Prog. Oceanogr. (IF 4.1) Pub Date : 2024-01-15 Carl Wunsch
Using a 26-year average of a dynamically consistent ECCO state-estimate, an effort is made to find a few simple descriptive, but quantitative, patterns of properties of the ocean circulation that are near-globally applicable outside the Arctic regions. The conceptual assumption is made that such an average is physically meaningful. Even with a 26-year average, complex spatial variations in the flow
-
Hydrography of the Southern Ocean fronts – The zooplankton link: A detailed study in the Indian Ocean sector Prog. Oceanogr. (IF 4.1) Pub Date : 2024-01-14 V. Venkataramana, R.K. Mishra, N. Anilkumar, Melena A. Soares, P. Sabu, A. Sarkar
Despite its importance, zooplankton diversity, biomass and abundance are still poorly known in the remote Indian sector of the Southern Ocean (SO). Therefore, systematic observations of zooplankton and hydrography have been made in the Indian sector of the SO, with a focus on Copepoda. We collected the data along 57° E transect during austral summer and examined various oceanographic locations in the
-
-
Geographical patterns of mesozooplankton functional diversity in the northwestern Pacific Prog. Oceanogr. (IF 4.1) Pub Date : 2024-01-07 Ruping Ge, Hongju Chen, Tianying Chen, Yu Zang, Weimin Wang, Yunyun Zhuang, Guangxing Liu
To better understand how communities response to environmental change and how biodiversity affects ecosystem function, it is essential to quantify the functional diversity of communities. However, the current understanding of zooplankton functional traits and functional diversity in the northwestern Pacific (NWP) is inadequate. In this study, we analyzed the latitudinal changes in functional traits
-
Anchovy (Engraulis ringens) and Pacific sardine (Sardinops sagax) variability changes in northern Chile associated with the environment and inter species synchronicity: GARCH model with exogenous variable and hybrid Bayesian deep learning estimation approach Prog. Oceanogr. (IF 4.1) Pub Date : 2024-01-04 Francisco Plaza-Vega, Héctor Araya
Small pelagic fish species, such as anchovy (Engraulis ringens) and Pacific sardine (Sardinops sagax), play a crucial role in marine ecosystems worldwide as they serve as an important food source for higher-order predators, such as seabirds, marine mammals, and larger fish species; also from their high productivity in terms of fishery landings, they help with maintaining food security. However, small
-
A review of the oceanographic structure and biological productivity in the southern Okhotsk Sea Prog. Oceanogr. (IF 4.1) Pub Date : 2023-12-22 Rodrigo Mundo, Tetsuya Matsunaka, Takuya Nakanowatari, Yukiko Taniuchi, Mutsuo Inoue, Hiromi Kasai, Kaisei Mashita, Hayata Mitsunushi, Seiya Nagao
The southern Okhotsk Sea is one of the best fishing grounds in Japan, and the biogeochemistry, primary productivity, and physical aspects of this region have been heavily researched. However, a comprehensive review of the literature has not been written since that by doctor Takatoshi Takizawa more than 40 years ago (1982). This review actualizes the share–ground knowledge of the influence of oceanographic
-
Spatial variation in the optical and molecular properties of dissolved organic matter in the Yellow Sea and East China Sea Prog. Oceanogr. (IF 4.1) Pub Date : 2023-12-20 Xuan Ji, Ming-Liang Zhao, Jing Zhang, Gui-Peng Yang
-
Investigation of hydrothermal activity in the South West Indian ridge region using Ra isotopes and 227Ac as tracers Prog. Oceanogr. (IF 4.1) Pub Date : 2023-12-19 Morgane Léon, Pieter van Beek, Virginie Sanial, Corentin Baudet, Matthew A. Charette, Marc Souhaut, Frédéric Vivier, Elodie Kestenare, Catherine Jeandel, Hélène Planquette
Hydrothermal vents have been shown to be important vectors for various chemical elements into the ocean. However, both the intensity of the chemical fluxes associated with these systems and the fate of the chemical elements along the plume are still largely overlooked. At two stations located above the South West Indian Ridge (SWIR), we investigate the distributions of the Ra quartet (223Ra, 224Ra
-
Understanding seasonal variability of mesozooplankton biomass in the upwelling system of central-southern Chile: A modelling approach Prog. Oceanogr. (IF 4.1) Pub Date : 2023-12-16 Ana Venegas, Pierre-Amaël Auger, Ruben Escribano, Carolina Parada
Understanding the mechanisms that influence variability in zooplankton biomass in eastern boundary upwelling systems (EBUS) is a critical step in estimating secondary production in the ocean, particularly in the context of biogeochemical modelling and assessing ecosystem productivity. In this study, we utilised a physical-biogeochemical hindcast simulation (2002–2008) to investigate the sources of
-
Observational energy transfers of a spiral cold filament within an anticyclonic eddy Prog. Oceanogr. (IF 4.1) Pub Date : 2023-12-02 Chunhua Qiu, Zihao Yang, Ming Feng, Jun Yang, Tom P. Rippeth, Xiaodong Shang, Zhenyu Sun, Chunsheng Jing, Dongxiao Wang
The ocean surface mixed layer represents a critical interface linking the ocean and atmosphere. The physical processes determining the surface mixed layer properties and mediate atmosphere–ocean exchange. Submesoscale processes play a key role in cross-scale oceanic energy transformation and the determination of surface mixed-layer properties, including the enhancement of vertical nutrient transport
-
Sources, Transport, and accumulation of Mercury in the northwestern Mediterranean margin sediments during the Industrial Era and influence of turbiditic events Prog. Oceanogr. (IF 4.1) Pub Date : 2023-12-01 Daniel Cossa, Roselyne Buscail, Bernard Dennielou, Olivier Radakovitch, Pere Puig, Alexis Khripounoff, Bernard Boutier, Serge Berné
Sources and pathways of the Hg accumulated in the sediments of the Gulf of Lion (GoL) and its adjacent marine areas (Northwestern Mediterranean) have been explored using sediment grab samples, sediment cores, and sediment trap samples. The main source of Hg along this margin is the Rhône River, whose suspended sediments settle mainly in the prodelta area but also along the mid-shelf, then reaching
-
Observations of near-inertial internal wave amplification and enhanced mixing after surface reflection Prog. Oceanogr. (IF 4.1) Pub Date : 2023-11-24 Kun Liu, Xu Chen, Peng Zhan, Lianglong Da, Hui Wang, Wuhong Guo, Jingyi Liu, Lei Chen, Bing Liu, Guandong Gao, Deyan Tian
The overreflection process of near-inertial internal waves (NIWs) has been theoretically predicted for several decades; however, to the best of our knowledge, this phenomenon has never been comprehensively investigated in real ocean scenarios. Based on the buoy observations collected several days after the passage of Typhoon Lekima in the Yellow Sea, a NIW surface overreflection event is clearly captured
-
Spring phytoplankton bloom phenology during recent climate warming on the Bering Sea shelf Prog. Oceanogr. (IF 4.1) Pub Date : 2023-11-22 Jens M. Nielsen, Michael F. Sigler, Lisa B. Eisner, Jordan T. Watson, Lauren A. Rogers, Shaun W. Bell, Noel Pelland, Calvin W. Mordy, Wei Cheng, Kirill Kivva, Sage Osborne, Phyllis Stabeno
High-latitude ecosystems commonly experience large phytoplankton blooms in spring, which provide basal resources for a range of grazers including zooplankton, benthic consumers and fishes. Variation of the timing and intensity of the spring phytoplankton bloom influences the degree of spatial and temporal overlap with consuming organisms. In the Bering Sea, blooms occur in association with ice retreat
-
From winter to late summer in the northwestern Barents Sea shelf: Impacts of seasonal progression of sea ice and upper ocean on nutrient and phytoplankton dynamics Prog. Oceanogr. (IF 4.1) Pub Date : 2023-11-22 Zoe Koenig, Morven Muilwijk, Håkon Sandven, Øyvind Lundesgaard, Philipp Assmy, Sigrid Lind, Karen M. Assmann, Melissa Chierici, Agneta Fransson, Sebastian Gerland, Elizabeth Jones, Angelika H.H. Renner, Mats A. Granskog
Strong seasonality is a key feature of high-latitude systems like the Barents Sea. While the interannual variability and long-term changes of the Barents Sea are well-documented, the seasonal progression of the physical and biological systems is less known, mainly due to poor accessibility of the seasonally ice-covered area in winter and spring. Here, we use an extensive set of physical and biological
-
Dynamics of Atmospheric-Driven Surface Currents on The Gulf of Cadiz Continental Shelf and its link with The Strait of Gibraltar and The Western Alboran Sea Prog. Oceanogr. (IF 4.1) Pub Date : 2023-11-22 S. Sirviente, M. Bolado-Penagos, J.J. Gomiz-Pascual, J. Romero-Cózar, A. Vázquez, M Bruno
Several studies about the coastal circulation over the continental shelf of the Gulf of Cadiz have been published in the last twenty years. One of the most studied features in these papers are the so-called Coastal Counter Currents (CCCs) which are located roughly between the 100 m isobath and the coastline and are directed westwards. Despite the considerable number of articles devoted to the analysis
-
Interannual differences in sea ice regime in the north-western Barents Sea cause major changes in summer pelagic production and export mechanisms Prog. Oceanogr. (IF 4.1) Pub Date : 2023-11-22 Martí Amargant-Arumí, Oliver Müller, Yasemin V. Bodur, Iliana-V. Ntinou, Tobias Vonnahme, Philipp Assmy, Doreen Kohlbach, Melissa Chierici, Elizabeth Jones, Lasse M. Olsen, Tatiana M. Tsagaraki, Marit Reigstad, Gunnar Bratbak, Rolf Gradinger
-
Assessing net primary production in the northwestern Barents Sea using in situ, remote sensing and modelling approaches Prog. Oceanogr. (IF 4.1) Pub Date : 2023-11-18 Laura Castro de la Guardia, Tania Hernández Fariñas, Christian Marchese, Martí Amargant-Arumí, Paul G. Myers, Simon Bélanger, Philipp Assmy, Rolf Gradinger, Pedro Duarte
The northwestern Barents Sea (NW-BS) is a highly productive region within the transitional zones of an Atlantic to Arctic-dominated marine ecosystem. The steep latitudinal gradients in sea ice concentration, Atlantic and Arctic Water, offer an opportunity to test hypotheses on physical drivers of spatial and temporal variability of net primary production (NPP). However, quantifying NPP in such a large
-
Gelatinous zooplankton off the Northeast Greenland coast Prog. Oceanogr. (IF 4.1) Pub Date : 2023-11-17 Karol Mazanowski, Maciej K. Mańko, Eva F. Møller, Agata Weydmann-Zwolicka
Gelatinous zooplankton are useful indicators of climate-driven shifts in the ocean; hence our study goal was to determine their diversity and distribution in the poorly investigated area of the Northeast Greenland shelf and adjacent waters. Zooplankton samples were collected vertically using a MultiNet in August and September 2017, at 9 stations along two transects: northern and southern. Eleven taxa
-
Seasonal and regional variability of model-based zooplankton biomass in the Salish Sea and evaluation against observations Prog. Oceanogr. (IF 4.1) Pub Date : 2023-11-11 Karyn D. Suchy, Elise Olson, Susan E. Allen, Moira Galbraith, BethElLee Herrmann, Julie E. Keister, R. Ian Perry, Akash R. Sastri, Kelly Young
We used a three-dimensional coupled biophysical model to examine zooplankton dynamics in the Salish Sea, NE Pacific. First, we evaluated the two zooplankton classes of the SalishSeaCast model using a transboundary zooplankton dataset comprised of observation data from the Canadian and United States waters of the Salish Sea from 2015 to 2019. Model zooplankton classes correspond to micro- and meso-zooplankton
-
Assessment of oceanographic conditions during the North Atlantic EXport processes in the ocean from RemoTe sensing (EXPORTS) field campaign Prog. Oceanogr. (IF 4.1) Pub Date : 2023-11-11 Leah Johnson, David A. Siegel, Andrew F. Thompson, Erik Fields, Zachary K. Erickson, Ivona Cetinic, Craig M. Lee, Eric A. D'Asaro, Norman B. Nelson, Melissa M. Omand, Michaela Sten, Shawnee Traylor, David P. Nicholson, Jason R. Graff, Deborah K. Steinberg, Heidi M. Sosik, Ken O. Buesseler, Mark A. Brzezinski, Inia Soto Ramos, Filipa Carvalho, Stephanie A. Henson
This manuscript presents an overview of NASA’s EXport Processes in the Ocean from Remote Sensing 2021 Field Campaign in the North Atlantic (EXPORTS NA) and provides quantitative and dynamical descriptions of the physical processes modulating water transformations during the study. A major programmatic goal was to conduct the sampling in a Lagrangian mode so that ocean ecological and biogeochemical
-
Connecting Subtropical Salinity Maxima to Tropical Salinity Minima: Synchronization between Ocean Dynamics and the Water Cycle Prog. Oceanogr. (IF 4.1) Pub Date : 2023-11-10 Lisan Yu
Recent satellite observations reveal that the annual cycles of tropical sea surface salinity (SSS) minimum (Smin) and subtropical SSS maximum (Smax) are phased locked, with the former leading the latter by six months. The evidence suggests an interconnected nature between the salinity extrema, motivating an investigation into the underlying mechanisms. It is found that the poleward Ekman transport
-
The Pacific water flow branches in the eastern Chukchi Sea Prog. Oceanogr. (IF 4.1) Pub Date : 2023-11-10 Robert S. Pickart, Peigen Lin, Frank Bahr, Leah T. McRaven, Jie Huang, Astrid Pacini, Kevin R. Arrigo, Carin J. Ashjian, Catherine Berchok, Mark F. Baumgartner, Kyoung-Ho Cho, Lee W. Cooper, Seth L. Danielson, Douglas Dasher, Amane Fuiwara, Jeanette Gann, Jacqueline M. Grebmeier, Jianfeng He, Toru Hirawake, Motoyo Itoh, Sarah Zimmermann
The flow of Pacific-origin water across the Chukchi Sea shelf impacts the regional ecosystem in profound ways, yet the two current branches on the eastern shelf that carry the water from Bering Strait to Barrow Canyon – the Alaskan Coastal Current (ACC) and Central Channel (CC) Branch – have not been clearly distinguished or quantified. In this study we use an extensive collection of repeat hydrographic
-
Acoustic backscattering at a tidal intrusion front Prog. Oceanogr. (IF 4.1) Pub Date : 2023-11-08 Christopher Bassett, Andone C. Lavery, David Ralston, W. Rockwell Geyer, Joseph T. Jurisa, Jim Thomson, David A. Honegger, Alexandra Simpson, Malcom E. Scully, Merrick C. Haller
Strong spatial gradients and rapidly evolving, three-dimensional structure make estuarine fronts difficult to sample. Echosounders can be used near fronts to provide nearly synoptic images of water column processes and, with sufficient bandwidth, can provide quantitative information about dynamical variables derived from forward and inverse methods using acoustic backscattering measurements. This manuscript
-
Variation of amino acid in the sinking particulates in the northeastern Arabian Sea and the northern Bay of Bengal Prog. Oceanogr. (IF 4.1) Pub Date : 2023-11-07 Apsara P Vijayan, Siby Kurian, Duphrin Joseph, Megha Dixon, Harshada Kankonkar, Rakhee Khandeparker, Supriya Karapurkar, Anand Methar
Sediment traps are widely used to get insight into how particulate matter forms and settles in the water column. Earlier studies in the Northern Indian Ocean have shown that the sinking flux depends mainly on surface primary production and varies seasonally and inter-annually. In the case of the Bay of Bengal, river runoff plays a significant role in the sinking flux. As a part of the SIBER-INDIA program
-
Regional to global assessments of ocean transparency dynamics from 1997 to 2019 Prog. Oceanogr. (IF 4.1) Pub Date : 2023-11-03 Junting Guo, Zihan Zhao, Ruichen Cao, Xianqing Lv
Water transparency, often quantified using the Secchi disk depth (Zsd), is a key parameter for assessing the water quality and ecological health in marine environments. However, a limited understanding of global Zsd dynamics over the past two decades exists. To assess the variations of ocean transparency over multiple timescales, the Ocean Colour Climate Change Initiative (OC-CCI) datasets are used
-
Steric heights of submesoscale processes and internal gravity waves in the subtropical northwestern Pacific and northern South China Sea as revealed by moored observations Prog. Oceanogr. (IF 4.1) Pub Date : 2023-11-04 Mingfang Miao, Zhiwei Zhang, Jinchao Zhang, Yue Wang, Wei Zhao, Jiwei Tian
The Surface Water and Ocean Topography (SWOT) altimeter mission provides a good opportunity to globally detect submesoscale processes (submesoscales) from high-resolution sea surface height (SSH) measurements. However, in addition to the balanced mesoscale eddies and submesoscales, the measured SSH also contains signals of unbalanced internal gravity waves (IGWs) including internal tides (ITs) and
-
Hydrography, inorganic nutrients and chlorophyll a linked to sea ice cover in the Atlantic Water inflow region north of Svalbard Prog. Oceanogr. (IF 4.1) Pub Date : 2023-11-04 Angelika H.H. Renner, Allison Bailey, Marit Reigstad, Arild Sundfjord, Melissa Chierici, Elizabeth M. Jones
Changes in the inflow of Atlantic Water (AW) and its properties to the Arctic Ocean bring more warm water, contribute to sea ice decline, promote borealisation of marine ecosystems, and affect biological and particularly primary productivity in the Eurasian Arctic Ocean. One of the two branches of AW inflow follows the shelf break north of Svalbard, where it dominates oceanographic conditions, bringing
-
Diffusive and advective cross-frontal fluxes of inorganic nutrients and dissolved inorganic carbon in the Barents Sea in autumn Prog. Oceanogr. (IF 4.1) Pub Date : 2023-11-04 Zoe Koenig, Ilker Fer, Melissa Chierici, Agneta Fransson, Elizabeth Jones, Eivind H. Kolås
The Atlantic Water, entering the Arctic through the Barents Sea and Fram Strait, is the main source of nutrients in the Arctic Ocean. The Barents Sea is divided by the Polar Front into an Atlantic-dominated domain in the south, and an Arctic-dominated domain in the north. The Polar Front is a thermohaline structure, which is topographically-steered at sub-surface, and influenced by the seasonal sea
-
Stressors of primary productivity in the north Indian ocean revealed by satellite, reanalysis and CMIP6 data Prog. Oceanogr. (IF 4.1) Pub Date : 2023-11-04 N. Sunanda, J. Kuttippurath, A. Chakraborty, R. Peter
-
A local eddy viscosity parameterization for wind-driven estuarine exchange flow, Part II: Entrainment Prog. Oceanogr. (IF 4.1) Pub Date : 2023-11-04 N. Berkay Basdurak, Hans Burchard, Henk M. Schuttelaars
Structure and intensity of estuarine exchange flow depend significantly on the eddy viscosity Av profile which is dynamically linked to various forces (e.g., gravitational, tidal, wind-driven). The impact of winds on the exchange flow is complex due to its direct (local and remote changes in shear and density stratification) and indirect (modifications to Av profiles) contributions. This study aims
-
Environmental controls on macrozooplankton and fish distributions over diurnal to seasonal time scales in the northern Barents Sea Prog. Oceanogr. (IF 4.1) Pub Date : 2023-11-03 Heather Cannaby, Randi B. Ingvaldsen, Øyvind Lundesgaard, Angelika H.H. Renner, Georg Skaret, Serdar S. Sakinan, Terje Hovland, Melissa Chierici, Harald Gjøsæter
We present acoustic observations obtained by bottom mounted echosounders at two locations in the northern Barents Sea and a third on the northern continental slope of the Barents Sea. Data collected over a period of approximately two years reveal significant variability in the density and depth distribution of pelagic macrozooplankton and fish. Variability over diurnal to seasonal timescales is related
-
Geographic, seasonal and ontogenetic variations of δ15N and δ13C of Japanese sardine explained by baseline variations and diverse fish movements Prog. Oceanogr. (IF 4.1) Pub Date : 2023-11-02 Tatsuya Sakamoto, Taketoshi Kodama, Sachiko Horii, Kazutaka Takahashi, Atsushi Tawa, Yosuke Tanaka, Seiji Ohshmio
Understanding and predicting variability in the stable isotope ratios of nitrogen and carbon (δ15N and δ13C, respectively) of small pelagic fish is crucial to enable isotopic studies of a variety of marine predators that feed on them. However, because the isotope ratios reflect plastic feeding habits and fish migration in addition to baseline variation, their predictions require a mechanistic understanding
-
Unravelling mechanisms behind population dynamics, biological traits and latitudinal distribution in two benthic ecosystem engineers: A modelling approach Prog. Oceanogr. (IF 4.1) Pub Date : 2023-10-28 Lola De Cubber, Sébastien Lefebvre, Théo Lancelot, Daniel Schaffer Ferreira Jorge, Sylvie Marylène Gaudron
-
Circumpolar distributions of age and anthropogenic CO2 content of Antarctic Bottom Water revealed by chlorofluorocarbon and sulfur hexafluoride Prog. Oceanogr. (IF 4.1) Pub Date : 2023-10-30 Yoshihiko Ohashi, Michiyo Yamamoto-Kawai, Kazuya Kusahara, Ken'ichi Sasaki, Kay I. Ohshima
Antarctic Bottom Water (AABW) sequesters anthropogenic CO2 (Cant) over the long-term and impacts the global carbon cycle. In this study, data of chlorofluorocarbon and sulfur hexafluoride observed from 2005 to 2020 in the Southern Ocean (SO) were used to investigate the age and Cant content of AABW. In the coastal regions of the Cosmonaut, Cooperation, D’Urville, and Somov Seas and near the Pacific-Antarctic
-
Community assembly and network stability of picoeukaryotic plankton communities in the northeast Indian Ocean Prog. Oceanogr. (IF 4.1) Pub Date : 2023-10-29 Zhuo Chen, Ting Gu, Jun Sun
Picoeukaryotic plankton played as key components of marine microbial communities, and participate in the marine food webs, especially the carbon cycling. Despite their importance, little is known about the mechanisms of assembly and network stability of picoeukaryotic plankton in the ocean along vertical gradients. Here, we obtained new dataset on the dynamics of picoeukaryotic plankton communities
-
Seasonal upwelling influence on trophic indices of mesozooplankton in a coastal food web estimated from δ15N in amino acids Prog. Oceanogr. (IF 4.1) Pub Date : 2023-10-20 R. García-Seoane, I.G. Viana, A. Bode
Mesozooplankton communities in upwelling ecosystems are known to be influenced by seasonal upwelling enhancing primary productivity. However, the extent to which changes in trophic dynamics of mesozooplankton are driven by variations in the baseline of nitrogen or in the trophic position (TP) is poorly understood. We used nitrogen stable isotopes (δ15N) in bulk and in specific amino acids (CSIA-AA)
-
Vertical changes in zooplankton abundance, biomass, and community structure at seven stations down to 3000 m in neighboring waters of Japan during the summer: Insights from ZooScan imaging analysis Prog. Oceanogr. (IF 4.1) Pub Date : 2023-10-23 Kunito Yamamae, Yasuhide Nakamura, Kohei Matsuno, Atsushi Yamaguchi
The imaging device ZooScan is used to examine net-collected zooplankton samples. ZooScan has been applied to regional and seasonal changes in the zooplankton community, but it has rarely been used to characterize vertical changes, especially down to the deep sea. In this study, we report a ZooScan analysis of vertically stratified zooplankton samples collected by collected by Vertical Multiple Plankton
-
Top-down control over dissolved organic carbon in the bottom water of the Weddell Sea and its implication for the continental shelf pump Prog. Oceanogr. (IF 4.1) Pub Date : 2023-10-20 Ziming Fang, Kun Zhang, Weifeng Yang, Min Chen, Aron Stubbins, Huina Hu
Dense water out of the Antarctic shelves is expected to drive the transport of carbon into the deep Southern Ocean via the formation of Antarctic Bottom Water. However, bottom water formation’s capacity to sequester carbon into the deep ocean is poorly constrained. Here, dissolved organic carbon (DOC), dissolved black carbon (DBC), and particulate organic carbon (POC) were examined to reveal the influence
-
A biophysical model of Calanus hyperboreus in the Gulf of St. Lawrence: Interannual variability in phenology and circulation drive the timing and location of right whale foraging habitat in spring and early summer Prog. Oceanogr. (IF 4.1) Pub Date : 2023-10-20 Nicolas Le Corre, Catherine E. Brennan, Joël Chassé, Catherine L. Johnson, Diane Lavoie, Jean-Philippe Paquin, Nancy Soontiens, Stéphane Plourde
Since 2015, North Atlantic right whale (NARW) occurrences have considerably increased in the Gulf of St. Lawrence (GSL), likely driven by a decrease in the availability of their historically preferred prey, the lipid-rich Calanus spp. (Copepoda), in their traditional foraging habitats. In the southern GSL (sGSL) where most NARW sightings occurred in recent years, the large bodied and lipid-rich Calanus