Article
Oceanography
P. Velez-Belchi, V Cainzos, E. Romero, M. Casanova-Masjoan, C. Arumi-Planas, D. Santana-Toscano, A. Gonzalez-Santana, M. D. Perez-Hernandez, A. Hernandez-Guerra
Summary: This study characterizes the Canary intermediate poleward undercurrent (CiPU) in the Canary Current upwelling system, revealing that it flows deeper than other poleward undercurrents in eastern boundary systems and is driven by pressure gradients between Antarctic Intermediate Waters and Mediterranean Outflow waters. The CiPU exhibits high seasonal variability, with maximum strength in autumn and minimum in spring, due to poleward extension of Antarctic Intermediate Waters forced by Ekman pumping in the tropics.
JOURNAL OF PHYSICAL OCEANOGRAPHY
(2021)
Article
Green & Sustainable Science & Technology
David Christie, Simon P. Neill, Peter Arnold
Summary: Waves in coastal areas can be converted into electricity through wave energy converters. However, the lack of knowledge about the regional distribution and variability of wave properties is a challenge for wave energy conversion. In this study, we accurately simulated the wave climate of the Canary Islands using physics-based and non-physics-based approaches. The results showed that the annual mean wave power on the north-western coast of Lanzarote Island was about 25 kW/m. The variability of wave energy resource was relatively low, and the dominance of swell waves reduced the variability when combined with wind energy.
Article
Geochemistry & Geophysics
I Tomasi, M. Massironi, C. M. Meyzen, R. Pozzobon, F. Sauro, L. Penasa, T. Santagata, M. Tonello, G. D. Santana Gomez, J. Martinez-Frias
Summary: The study of the lava tube system in La Corona reveals the significant role of pyroclastic layers in the development of lava tubes. The mechanical strength of the substrate, variations in paleo-surface slope, and lava physical properties also influence erosion. These findings are relevant to the understanding of extra-terrestrial lava tube systems.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2022)
Article
Oceanography
Junlu Li, Jianping Gan
Summary: The study investigates the subsurface circulation system in the western North Pacific and reveals the characteristics and formation mechanism of the Luzon Undercurrent (LUC). The LUC transport shows weak seasonality and strong intra-seasonal variation, and its origin is closely connected with the Deep North Equatorial Current (DNEC) and the South China Sea Intermediate Water. The appearance of the LUC is dynamically linked with the sea surface height gradient and the downward tilting of the zonal isopycnal off the Philippine coast. The core of the LUC shifts from in-shore to off-shore waters spatially.
JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
(2022)
Article
Multidisciplinary Sciences
Kaihe Yamazaki, Shigeru Aoki, Katsuro Katsumata, Daisuke Hirano, Yoshihiro Nakayama
Summary: This study reveals that the movement of the southern boundary (SB) of the Antarctic Circumpolar Current is influenced by the upper overturning circulation. Through a reexamination of hydrographic data, it was found that there is overall warming and a poleward shift of subsurface isotherms of SB.
Article
Environmental Sciences
Maria Couret, Jose M. Landeira, Victor M. Tuset, Airam N. Sarmiento-Lezcano, Pedro Velez-Belchi, Santiago Hernandez-Leon
Summary: Understanding the structure and function of plankton distribution is crucial for comprehending their role in trophic transfer and efficiency. This study investigated the zooplankton distribution, abundance, composition, and size spectra in the Canaries-African Transition Zone (C-ATZ) under different oceanographic conditions. Results showed that during the late winter bloom, influenced by upwelling, chlorophyll a and primary production were higher compared to the stratified season, with steeper size spectra suggesting a more efficient ecosystem structure.
MARINE ENVIRONMENTAL RESEARCH
(2023)
Article
Oceanography
Nan Zang, Janet Sprintall, Remi Ienny, Fan Wang
Summary: The connected western boundary current system in the Arabian Sea plays a crucial role in the exchange of heat, mass, and freshwater. The seasonality of the Somali Current/Undercurrent system is driven by seasonal monsoon winds, with the presence of high salinity water masses affecting the flow dynamics. Salinity dynamics play a fundamental role in the circulation of the Arabian Sea boundary current system, influencing the behavior of both the Somali Current and Undercurrent.
DEEP-SEA RESEARCH PART II-TOPICAL STUDIES IN OCEANOGRAPHY
(2021)
Article
Environmental Sciences
Ying Huang, Linlin Zhang, Fujun Wang, Fan Wang, Dunxin Hu
Summary: The interannual variability of the North Equatorial Current (NEC)/Undercurrent (NEUC) in the northwestern Pacific was investigated using mooring array measurements and satellite altimetry. The study found that the velocity of NEC/NEUC exhibits significant variations on the interannual time scale and is primarily controlled by the westward propagating baroclinic Rossby wave induced by wind stress curl forcing in the central Pacific.
FRONTIERS IN MARINE SCIENCE
(2022)
Article
Oceanography
C. D. Luko, I. C. A. da Silveira, I. T. Simoes-Sousa, J. M. Araujo, A. Tandon
Summary: The southern branch of the South Equatorial Current is the northern limit of the South Atlantic Subtropical Gyre, bifurcating into the Brazil Current and North Brazil Undercurrent when it reaches Brazil. This study shows that the South Equatorial Current arrives at the South Atlantic western boundary as a multi-banded flow with different subsurface cores, influencing the seasonality of the Brazil Current and mesoscale eddies off Brazil.
JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
(2021)
Article
Geosciences, Multidisciplinary
Wen-Hui Chen, Haojia Ren, John C. H. Chiang, You-Lin Wang, Ren-Yi Cai-Li, Yi-Chi Chen, Chuan-Chou Shen, Frederick W. Taylor, Thomas M. DeCarlo, Chau-Ron Wu, Horng-Sheng Mii, Xingchen Tony Wang
Summary: The wind-driven meridional overturning circulation between the tropical and subtropical oceans plays a crucial role in regulating temperature fluctuations on decadal scales in the Pacific Ocean and globally. It has been found that an acceleration of this circulation can lead to a reduction in global surface temperature by increasing heat storage in the ocean. By studying N-15/N-14 ratios recorded in Porites spp. corals in the western tropical South Pacific, researchers have discovered that these ratios are sensitive to water mass exchanges driven by western boundary transport. The observed decline in the N-15/N-14 ratio suggests a strengthening of the South Pacific western boundary current and its potential contribution to the strengthening of the Equatorial Undercurrent.
Article
Geography, Physical
Hartmut Heinrich, Christoph Schmidt, Florian Ziemen, Uwe Mikolajewicz, Christopher-Bastian Roettig
Summary: New IRSL ages of eolianites near Munique (Lanzarote) demonstrate the impact of millennial scale climatic variability on sedimentary dynamics in the Canary Islands during the last glacial cycle. Different depositional types were formed under interstadial and stadial climatic conditions, with sequences of eolian deposits comprising three main types. DepoType 3, rich in dust from African subtropical/tropical Latisols, marks the end of a sequence and was deposited during Heinrich Events under stadial conditions.
QUATERNARY RESEARCH
(2021)
Article
Multidisciplinary Sciences
Zhijie Zhang, Qiang Yang, Trevor S. Fristoe, Wayne Dawson, Franz Essl, Holger Kreft, Bernd Lenzner, Jan Pergl, Petr Pysek, Patrick Weigelt, Marten Winter, Nicol Fuentes, John T. Kartesz, Misako Nishino, Mark van Kleunen
Summary: The introduction of plants outside their native ranges by humans has had significant ecological consequences. This study focuses on intracontinental aliens, which are naturalized plant species that have originated within the same continent. The researchers discovered that these intracontinental aliens account for a small percentage of overall plant species, but constitute a large proportion of naturalized species. The findings also indicate a poleward naturalization trend, primarily driven by larger native species pools in low-latitudes.
Review
Environmental Sciences
J. Mangas, E. Perez-Chacon Espino
Summary: In this study, petrographic analysis was conducted on 50 sandy beach samples from the eastern Canary Islands to determine the composition and origin of the sand grains. The samples contained calcareous bioclasts, lithoclasts, and volcaniclasts, with variations depending on the island's building stages. Calcareous bioclasts were mainly fragments from red coralline algae and molluscs, while lithoclasts were fragments of alkaline rocks from different stages. The intraclasts consisted of fragments from coastal sedimentary rocks. The abundance of these components varied by geographic and geological factors. Overall, the proportions of bioclasts were higher than lithoclasts in La Graciosa, Lanzarote, and Fuerteventura, while volcaniclasts were more abundant in Gran Canaria. Trachytic-phonolitic sand grains were only found in Gran Canaria. Urban and semi-urban beaches had lower percentages of bioclasts compared to natural beaches.
ENVIRONMENTAL EARTH SCIENCES
(2023)
Article
Multidisciplinary Sciences
Victor Garcia-Olivares, Luis A. Rubio-Rodriguez, Adrian Munoz-Barrera, Ana Diaz-de Usera, David Jaspez, Antonio Inigo-Campos, Maria Del Cristo Rodriguez Perez, Antonio Cabrera de Leon, JoseM. Lorenzo-Salazar, Rafaela Gonzalez-Montelongo, Vicente M. Cabrera, Carlos Flores
Summary: The Europeans began conquering the Canary Islands in the early 15th century and the surrender of the aborigines happened in 1496. The conquest and arrival of settlers led to a significant change in the demographic composition of the archipelago. Through analyzing 896 mitogenomes of current inhabitants, it has been found that the genetic footprints of the aboriginal population remain prevalent in the current population, even at higher levels than previously thought. Additionally, the age estimates of autochthonous founder lineages suggest that the aboriginals arrived in the islands at the beginning of the first millennium. It is also revealed that the main recognizable genetic influences from Europe come from Portugal and Galicia.
Article
Engineering, Aerospace
Yijia Zhao, Zhengxian Liu, Luyang Fu, Ming Zhao, Xiaojian Li
Summary: In this study, a multi-component optimization of self-recirculation casing treatment (SRCT) and diffuser for a turbocharger compressor is performed to improve the aerodynamic performances of the compressor. The results show that the efficiency, pressure ratio, choke flow rate, and stable flow range of the compressor are improved through various flow mechanisms.
AEROSPACE SCIENCE AND TECHNOLOGY
(2023)
Review
Oceanography
Cristina Arumi-Planas, Alonso Hernandez-Guerra, Veronica Cainzos, Pedro Velez-Belchi, Riccardo Farneti, Matthew R. Mazloff, Sabine Mecking, Isabella Rosso, Lena M. Schulze Chretien, Kevin G. Speer, Lynne D. Talley
Summary: The study compared meridional circulation and transport at 32 degrees S in the Pacific Ocean in 1992, 2003, 2009, and 2017, finding significant differences in circulation patterns in 2009 compared to other years.
PROGRESS IN OCEANOGRAPHY
(2022)
Article
Environmental Sciences
Veronica Cainzos, Anton Velo, Fiz F. Perez, Alonso Hernandez-Guerra
Summary: The change in anthropogenic CO2 in the Atlantic Ocean is linked to the Atlantic Meridional Overturning Circulation (AMOC). Advection and diffusion play important roles in the transport of CO2, with strong vertical diffusion between the upper and deep layers.
GLOBAL BIOGEOCHEMICAL CYCLES
(2022)
Article
Geosciences, Multidisciplinary
Veronica Cainzos, Alonso Hernandez-Guerra, Riccardo Farneti, M. Dolores Perez-Hernandez, Lynne D. Talley
Summary: The Atlantic meridional overturning circulation (AMOC) is crucial for climate in the Atlantic region as it redistributes mass, heat, and freshwater. Hydrographic sections help monitor its strength at different latitudes, and inverse box models provide estimates of AMOC, heat, and freshwater transports. The study uses hydrographic zonal sections to evaluate the accuracy of different inverse models and finds that using multiple sections over several decades yields more consistent results, reducing the effects of aliasing.
GEOPHYSICAL RESEARCH LETTERS
(2023)
Article
Multidisciplinary Sciences
Mia Cerfonteyn, Rene Groben, Daniel Vaulot, Kristinn Gudmundsson, Pauline Vannier, Maria Dolores Perez-Hernandez, Viggo Por Marteinsson
Summary: Phytoplankton in Iceland's contrasting hydrography showed different community compositions between northern and southern water masses, indicating sensitivity to climate change. Emiliania and Phaeocystis dominated in Atlantic-influenced waters and colder, northern waters respectively. The study provides a valuable dataset for further exploring the diversity and biogeography of marine protists in the North Atlantic through 18S rRNA analysis.
SCIENTIFIC REPORTS
(2023)
Article
Oceanography
Cristina Arumi-Planas, Maria Dolores Perez-Hernandez, Josep L. Pelegri, Pedro Velez-Belchi, Mikhail Emelianov, Veronica Cainzos, Luis Cana, Yvonne L. Firing, Luis Garcia-Weil, Daniel Santana-Toscano, Alonso Hernandez-Guerra
Summary: The South Atlantic Ocean plays a crucial role in the heat exchange of the climate system by hosting the returning flow of the Atlantic Meridional Overturning Circulation (AMOC). Through data analysis from hydrographic cruises, we have identified different water masses and calculated their circulation patterns in the South Atlantic Subtropical gyre. We have also assessed the strength of the AMOC, heat transport, and freshwater flux in this region.
JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
(2023)
Article
Oceanography
M. D. Perez-Hernandez, A. Hernandez-Guerra, L. Cana-Cascallar, C. Arumi-Planas, V. Cainzos, A. J. Gonzalez-Santana, M. A. Gutierrez-Guerra, A. Martinez-Marrero, A. Mosquera Gimenez, C. Presas Navarro, D. Santana-Toscano, P. Velez-Belchi
Summary: For the first time, four dedicated hydrographic cruises were carried out in 2015 around the Canary Islands to determine the seasonality of the flows at the eastern boundary of the North Atlantic Subtropical Gyre. The results show that the Canary Current has a seasonal behavior, flowing on the easternmost position in winter and on the westernmost position in fall. At the Lanzarote Passage, the dominant flow is southward except in fall, where a northward transport is observed.
JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
(2023)
Review
Oceanography
Daniel Santana-Toscano, M. Dolores Perez-Hernandez, Alison M. Macdonald, Cristina Arumi-Planas, Veronica Cainzos, Alonso Hernandez-Guerra
Summary: The A20 line is a hydrographic section that spans the western North Atlantic Subtropical Gyre and encloses the main paths of the Atlantic Meridional Overturning Circulation. Using data from three cruises, the circulation of the western NASG is estimated, with the Gulf Stream as the main poleward path of the AMOC. The Deep Western Boundary Current crosses the section in the opposite direction. The net heat exchange from the ocean to the atmosphere, as well as the freshwater flux, shows interannual variability.
PROGRESS IN OCEANOGRAPHY
(2023)
Article
Meteorology & Atmospheric Sciences
Veronica Cainzos, M. Dolores Perez-Hernandez, Daniel Santana-Toscano, Cristina Arumi-Planas, Alonso Hernandez-Guerra
Summary: The circulation in the Atlantic Ocean is characterized by the complex system of pathways of the Atlantic Meridional Overturning Circulation (AMOC), which changes meridionally due to interaction with nearby water masses. Hydrographic data and inverse methods are used to characterize the currents and quantify their strength, transport, and properties. There have been no significant changes in the transport or properties of the currents over the past few decades. The South Atlantic has a subtropical gyre affected by recirculations, while the North Atlantic transports most of its water northward along the western boundary currents, with deep layers carrying water southward.
Article
Geosciences, Multidisciplinary
X. Flores-Melo, R. Giesecke, I. R. Schloss, M. P. Latorre, X. Durrieu de Madron, F. Bourrin, M. L. Spinelli, C. Menniti, H. E. Gonzales, E. Menschel, J. Martin
Summary: This study presents an evaluation of the downward fluxes and composition of particulate matter in the Beagle Channel. The results show that the fluxes and composition of particulate matter differ between the western and eastern parts of the channel, with the former influenced by glacial and organic material, and the latter dominated by river inputs and phytoplankton blooms. This research contributes to understanding the impact of climate change on the biological carbon pump and land-sea connections in this high-latitude ecosystem.
JOURNAL OF MARINE SYSTEMS
(2024)
Article
Geosciences, Multidisciplinary
Simone M. A. Lira, Ralf Schwamborn, Mauro de Melo Junior, Humberto L. Varona, Syumara Queiroz, Doris Veleda, Alef J. Silva, Sigrid Neumann-Leitao, Moacyr Araujo, Catarina R. Marcolin
Summary: In this study, CTD and ADCP data, as well as zooplankton samples from Fernando de Noronha Archipelago, were used to analyze the relationship between flow, island topography, chlorophyll-a fluorescence, and zooplankton abundance. The study found the presence of island and larval island effects downstream, and an upstream island effect upstream.
JOURNAL OF MARINE SYSTEMS
(2024)
Article
Geosciences, Multidisciplinary
Olga Yu. Evseeva, Alexander G. Dvoretsky
Summary: This study investigated the species composition and spatial distribution of bryozoan diversity in the southern region of Franz Josef Land. A total of 151 bryozoan species were found, including 22 species recorded for the first time in this region. The diversity of bryozoans in this area is influenced by environmental factors such as depth, temperature, and the content of stones and shells.
JOURNAL OF MARINE SYSTEMS
(2024)
Article
Geosciences, Multidisciplinary
Emma F. Young, Sally E. Thorpe, Angelika H. H. Renner, Eugene J. Murphy
Summary: Antarctic krill is a key species in the Southern Ocean and also the target of a commercial fishery. This study focuses on understanding the physical and behavioral drivers of krill movement and retention in the South Orkney Islands region through a regional modeling approach. The results suggest that oceanic transport and retention of krill are influenced by oceanographic variability and krill behavior.
JOURNAL OF MARINE SYSTEMS
(2024)
Article
Geosciences, Multidisciplinary
Viviane David, Anne Mouget, Pierre Thiriet, Corentin Minart, Yannick Perrot, Loic Le Goff, Olivier Bianchimani, Solene Basthard-Bogain, Tristan Estaque, Justine Richaume, Jean-Francois Sys, Adrien Cheminee, Eric Feunteun, Anthony Acou, Patrice Brehmer
Summary: Scientists combined split-beam and multibeam echosounders to detect and classify different fish species, and found that acoustic data significantly improved the accuracy of species classification. These acoustic methods have important implications for marine management and decision-making.
JOURNAL OF MARINE SYSTEMS
(2024)
Article
Geosciences, Multidisciplinary
Jia-Hui Xie, Xue-Lin Shao, Kai Ma, Li Gao
Summary: Chaetomorpha linum can store a large amount of phosphorus and utilize it for growth when phosphate is abundant, and it can produce alkaline phosphatase and release mobile phosphorus from sediments when phosphate is deficient. The sources of phosphorus supporting the blooms of C. linum vary seasonally in Swan Lagoon.
JOURNAL OF MARINE SYSTEMS
(2024)
Article
Geosciences, Multidisciplinary
A. A. Kubryakov, A. I. Mizyuk, S. V. Stanichny
Summary: This article investigates the evolution of the Sevastopol eddies using altimetry measurements and a high-resolution Nemo numerical model. The eddies can reside in the Black Sea for >3-6 months, impacting cross-shelf exchange and nutrient fluxes. The stationarity of the eddies is mainly due to the continental slope acting as a barrier, preventing cyclonic propagation.
JOURNAL OF MARINE SYSTEMS
(2024)
Article
Geosciences, Multidisciplinary
Qingyuan Yang, Guoping Zhu
Summary: This study investigated the feeding habits of the spiny icefish in the Bransfield Strait and used biochemical tracers to demonstrate the variability in its diet, which is influenced by the availability of krill and the dynamic hydrography. The results highlight the potential of biochemical tracers in reflecting changes in prey's diet in a highly dynamic environment.
JOURNAL OF MARINE SYSTEMS
(2024)
Article
Geosciences, Multidisciplinary
Andreana Cadaillon, Clara M. Iachetti, Ricardo Giesecke, Valeska Vasquez Lepio, Andrea Malits, Irene R. Schloss
Summary: A joint Chilean-Argentinian research cruise in the Beagle Channel revealed spatial and temporal heterogeneity of plankton abundance and composition. Plankton assemblages varied with bathymetry, water temperature, and nutrient availability. The easternmost sector of the channel had the highest total cell abundances and a diverse mix of small and large diatoms.
JOURNAL OF MARINE SYSTEMS
(2024)
Article
Geosciences, Multidisciplinary
Barbara P. Paiva, Carlos A. F. Schettini, Eduardo Siegle
Summary: The Sao Francisco River is an important river in Brazil, crossing the semi-arid region. A series of dams have been built along the river for hydropower, changing the flow significantly. A hydrodynamic model was used to simulate the effects of flow changes on saline intrusion in the estuary. The simulations showed an increase in mixing and decrease in river contribution after the dams were built. The results can be used by management agencies to improve water quality for human consumption.
JOURNAL OF MARINE SYSTEMS
(2024)
Article
Geosciences, Multidisciplinary
Xu Dong, Di Qi, Baohong Chen, Yingxu Wu, Xinqing Zheng, Hui Lin
Summary: Seasonal-scale local forcings reduce coastal pH and aragonite saturation state. The dynamics of carbonate system parameters were investigated in a coral habitat influenced by seasonal current patterns. Both Oaragonite and pH showed seasonal variations, controlled by dissolved inorganic carbon (DIC) and temperature. Ocean acidification scenarios projected a decrease in Oaragonite amplitude and an increase in hydrogen ion concentration ([H+]) amplitude.
JOURNAL OF MARINE SYSTEMS
(2024)
Article
Geosciences, Multidisciplinary
Roman Cieslinski, Izabela Chlost, Michal Szydlowski
Summary: The Vistula Lagoon, one of the two lagoons on the Polish coast, is economically and environmentally significant. This study aims to calculate the water balance of the lagoon before and after the construction of a canal through the Vistula Spit. The construction of the new connection may impact the lagoon's water balance and its biotic and abiotic environment. Data on precipitation, evaporation, inflow from the catchment, and inflow/outflow through the Strait of Baltiysk were collected for mathematical modeling. The study suggests that the construction of the new canal will not significantly alter the lagoon's water balance but may cause environmental problems.
JOURNAL OF MARINE SYSTEMS
(2024)
Article
Geosciences, Multidisciplinary
F. P. Brandini, A. M. Silver, A. Gangopadhyay
Summary: We demonstrate that wind-driven Ekman transport enhances the advection and mixing of cells, leading to the transport of colder water from the Surface Antarctic Waters to the warmer waters of the northern Polar Front belt. This mechanism provides cells with a favorable temperature environment, allowing for specific species and community growth rates to develop blooms under non-light limiting macronutrients and iron conditions. Our findings have important implications for increased productivity in a future warming climate.
JOURNAL OF MARINE SYSTEMS
(2024)
Article
Geosciences, Multidisciplinary
John E. Garzon-Cardona, Ana M. Martinez, Boris P. Koch, Bernd Krock, Elbio D. Palma, Xianyu Kong, Ruben J. Lara
Summary: This study aimed to gain a better understanding of the role of dissolved organic matter (DOM) in the biogeochemistry of the Southern Patagonian shelf. The results showed that terrigenous input is the main source of ammonium and refractory carbon in the region, while the Antarctic Circumpolar Current contributes autochthonous DOM. Additionally, regeneration processes of nitrogen-rich water were found in the Tierra del Fuego Waters and Grande Bay regions.
JOURNAL OF MARINE SYSTEMS
(2024)
Article
Geosciences, Multidisciplinary
Manoranjan Mishra, Tamoghna Acharyya, Bijay Halder, Celso Augusto Guimara Santos, Richarde Marques da Silva, Nihar Ranjan Rout, Debdeep Bhattacharyya
Summary: This study comprehensively analyzes the impacts of Tropical Cyclone Yaas on the mangrove forest in Bhitarkanika National Park, revealing significant ecosystem loss and changes in vegetation vigor and soil conditions, particularly an increase in salinity.
JOURNAL OF MARINE SYSTEMS
(2024)