Article
Environmental Sciences
Yunhe Wang, Haibo Bi, Yu Liang
Summary: The study reveals a significant decrease in winter multiyear ice (MYI) export through the Fram Strait (FS) over the past 20 years, with sea ice drift playing a major role in MYI export variability. In the most recent decade, strengthened low pressure in the North Atlantic sector and an eastward shift in the dipole anomaly, combined with weakened cyclonic activity south of the FS, contributed to the reduction in MYI export.
Article
Multidisciplinary Sciences
Lauren E. Kipp, Jerry F. McManus, Markus Kienast
Summary: The export of deep water from the Arctic to the Atlantic contributes to the formation of North Atlantic Deep Water, and researchers have found that a significant amount of Pa-231 missing from central Arctic sediments is likely lost via advection into the Nordic Seas, requiring deep water advection through Fram Strait. This study highlights the importance of understanding the contribution of Arctic waters to North Atlantic deep water formation.
NATURE COMMUNICATIONS
(2021)
Article
Environmental Sciences
Igor E. Kozlov, Oksana A. Atadzhanova
Summary: This study investigates the intensity and characteristics of eddy generation in the marginal ice zone (MIZ) regions of Fram Strait and around Svalbard using SAR data. The results show that submesoscale and small mesoscale eddies dominate, and the size of eddies increases with increasing ice concentration. Most eddies are detected at the ice edge and where the ice concentration is below 20%.
Article
Meteorology & Atmospheric Sciences
Hui Li, Alexey Fedorov, Wei Liu
Summary: This study compares the impacts of Arctic sea ice decline on the Atlantic meridional overturning circulation (AMOC) in two different configurations of the Community Earth System Model. The results show that in the lower-resolution configuration, the AMOC weakens gradually and approaches a new equilibrium, while in the higher-resolution configuration, the AMOC fully recovers after an initial weakening, driven by deep water formation in the Labrador Sea and adjacent regions.
JOURNAL OF CLIMATE
(2021)
Article
Environmental Sciences
Jung Hyun Park, Seong-Joong Kim, Hyung-Gyu Lim, Jong-Seong Kug, Eun Jin Yang, Baek-Min Kim
Summary: In recent decades, the accelerating rate of Arctic warming has increased river discharge into the Arctic Ocean, affecting phytoplankton response. In present-day climate simulations, additional river discharge reduces spring phytoplankton biomass due to increased sea ice concentration. However, in summer, phytoplankton increases due to surplus nitrate and increased vertical mixing caused by reduced summer sea ice melting water. Future climate simulations show similar effects, with major phytoplankton responses shifting from the Eurasian Basin to the Canada Basin and the East-Siberian Sea.
ENVIRONMENTAL RESEARCH LETTERS
(2023)
Article
Engineering, Environmental
Geraint A. Tarling, Jennifer J. Freer, Neil S. Banas, Anna Belcher, Mayleen Blackwell, Claudia Castellani, Kathryn B. Cook, Finlo R. Cottier, Malin Daase, Magnus L. Johnson, Kim S. Last, Penelope K. Lindeque, Daniel J. Mayor, Elaine Mitchell, Helen E. Parry, Douglas C. Speirs, Gabriele Stowasser, Marianne Wootton
Summary: The changing Arctic environment is influencing key zooplankton species such as Calanus finmarchicus, with areas near the ice-edge in the Fram Strait becoming more favorable for their habitat. This increase in suitable habitat is likely due to the long-term retreat of the ice-edge, allowing for earlier and longer phytoplankton blooms and higher temperatures that enhance copepod developmental rates. These changes can have significant implications for community structure and regional food-webs.
Article
Engineering, Environmental
Melanie Bergmann, Steve Allen, Thomas Krumpen, Deonie Allen
Summary: Plastic pollution is widespread, even in remote ecosystems like Arctic sea ice and deep-sea sediments. A pilot study found high concentrations of microplastics in ice algae Melosira arctica and ambient sea water from the Fram Strait. The microplastics could be trapped by the algae and act as a temporary sink and pathway to the deep seafloor.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2023)
Article
Environmental Sciences
Yijun Yang, Chao Min, Hao Luo, Frank Kauker, Robert Ricker, Qinghua Yang
Summary: This study estimates sea ice volume (SIV) flux and its age evolution through the Fram Strait using a parameter-optimized and fully physical ocean-sea ice coupled model and sea ice age observation. The mean annual SIV flux from 1979-2021 is estimated at about 1605 +/- 315 km(3) yr(-1) without a significant trend. The proportions of different age groups in the SIV flux show diverse variations, with second-year and third-year ice significantly increasing and fourth-year and five-year and older ice significantly decreasing in the 2010s compared to the 1980s. The dominant age of annual volume export through the Fram Strait shifts from four-year and five-year and older ice to second-year and third-year ice around 2007/2008. The study highlights the decreasing influence of Fram Strait SIV export on Arctic SIV variability with decreasing sea ice age.
ENVIRONMENTAL RESEARCH LETTERS
(2023)
Review
Geochemistry & Geophysics
Mary-Louise Timmermans, John M. Toole
Summary: The Beaufort Gyre, a wind-driven circulation in the Arctic Ocean, is a key indicator of climate change and may play a role in high-latitude climate control. This review examines the state of knowledge on the Beaufort Gyre, including its driving forces, relationship with sea-ice cover, source waters, circulation, and energetics. Recent years have witnessed significant changes in the Beaufort Gyre system, with increased circulation, heat, and freshwater content accompanying sea-ice losses. The understanding of these changes is evaluated, and updated time series data on heat and freshwater content are provided.
ANNUAL REVIEW OF MARINE SCIENCE
(2023)
Article
Meteorology & Atmospheric Sciences
Yu-Chiao Liang, Young-Oh Kwon, Claude Frankignoul
Summary: This study reveals a close connection between a boreal autumn sea ice dipole in the Arctic Pacific sector and sea ice anomalies in the Barents Sea during the following spring. A prediction model using the Arctic Pacific sea ice dipole with 7-month lead time shows significant prediction skills. The linkage between the two regional sea ice anomalies is suggested to involve positive stratospheric polar cap anomalies and a negative North Atlantic Oscillation-like pattern in midwinter.
JOURNAL OF CLIMATE
(2021)
Article
Oceanography
Haili Li, Changqing Ke, Qinghui Zhu, Xiaoyi Shen
Summary: This study estimates the exported sea ice volume through the Fram Strait from 2011 to 2018 using sea ice thickness, velocity, and concentration data. The analysis shows that sea ice velocity is the main contributor to sea ice export. Atmospheric circulation indices (Arctic Oscillation, North Atlantic Oscillation, and Arctic Dipole) and wind-driven oceanic circulation indices (Ekman transport) also have a certain impact on sea ice volume export. The exported sea ice volume rapidly increases in winter and decreases in spring, with winter export expected to exceed spring export in the future. The sea ice volume export through the zonal gate of the Fram Strait is significantly higher than that through the meridional gate due to the characteristics of higher thickness, velocity, and concentration.
ACTA OCEANOLOGICA SINICA
(2023)
Article
Environmental Sciences
Shizhu Wang, Qiang Wang, Muyin Wang, Gerrit Lohmann, Fangli Qiao
Summary: This study compares the representation of sea surface salinity and liquid freshwater content in Arctic Ocean simulations from CMIP5 and CMIP6 models. The results show no significant improvement in CMIP6 compared to CMIP5, with overestimation of liquid freshwater content being a common bias in CMIP6. The study also investigates projected changes in freshwater content and budget under different socioeconomic scenarios, showing a trend of increased freshwater sources and a shift from a freshwater sink to a source. The findings highlight the ongoing freshening trend in the Arctic Ocean with implications on its physical and biogeochemical environment.
Article
Oceanography
Fabrice Collard, Louis Marie, Frederic Nouguier, Marcel Kleinherenbrink, Frithjof Ehlers, Fabrice Ardhuin
Summary: Wind-generated waves strongly interact with sea ice, impacting air-sea exchanges, operations at sea, and marine life. The dissipation of wave energy and its effect on upper ocean mixing and ice drift are not well understood. Limited in situ observations in the Arctic hinder scientific understanding. Radar and optical remote sensing can be used systematically to investigate wave-ice interactions.
JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
(2022)
Article
Oceanography
Jaclyn Clement Kinney, Marina Frants, Wieslaw Maslowski, Robert Osinski, Nicole Jeffery, Meibing Jin, Younjoo J. Lee
Summary: In July 2011, a massive phytoplankton bloom was observed under the sea ice in the western Chukchi Sea, raising questions about its extent and frequency in the Arctic Ocean. Using a regional Arctic system model, our study shows that under-ice phytoplankton growth is extensive in the western Arctic in summer, and occurs annually but to a lesser extent in the eastern Arctic. We conclude that the high chlorophyll-a concentrations in the eastern Arctic are not developed under the sea ice but formed in open waters upstream and advected beneath the sea ice by ocean currents.
JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
(2023)
Article
Meteorology & Atmospheric Sciences
Yu Liang, Haibo Bi, Ruibo Lei, Timo Vihma, Haijun Huang
Summary: By investigating the patterns of horizontal atmospheric latent energy (LE) transport towards the Arctic, this study identified four primary transport pathways and observed their interannual variability. The results indicate that these pathways are significantly modulated by cyclones, especially the northern Europe and Greenland Sea pathways. The study also provides insights into the relationship between atmospheric LE transport and air temperature, moisture, surface heat flux, and sea ice anomalies over the Arctic Ocean in winter. Through thermodynamic analysis, it argues that the enhanced local atmosphere-ice interactions caused by poleward LE transport contribute to the loss of Arctic sea ice.
JOURNAL OF CLIMATE
(2023)
Article
Microbiology
Cora Hoerstmann, Pier Luigi Buttigieg, Uwe John, Eric J. Raes, Dieter Wolf-Gladrow, Astrid Bracher, Anya M. Waite
Summary: This study investigated microbial diversity and primary productivity in the Atlantic Ocean between 50 degrees south and north, revealing distinct diversity patterns among different provinces. Samplewise productivity-specific length scales were calculated to provide key context for further analysis, linking diversity patterns to oceanographic transport through primary production.
ENVIRONMENTAL MICROBIOLOGY
(2022)
Article
Environmental Sciences
Franziska Pausch, Florian Koch, Christel Hassler, Astrid Bracher, Kai Bischof, Scarlett Trimborn
Summary: This study investigates the responses of Southern Ocean phytoplankton under different climate change scenarios. It finds that under ocean acidification, the numerical dominance of diatoms is reduced in both future mixing scenarios, but their productivity increases.
FRONTIERS IN MARINE SCIENCE
(2022)
Article
Microbiology
Anabel von Jackowski, Kevin W. Becker, Matthias Wietz, Christina Bienhold, Birthe Zancker, Eva-Maria Noethig, Anja Engel
Summary: The seasonal variations in biopolymers, microbial abundance, and microbial composition in the upper 100 meters of the Fram Strait were investigated during summer and fall. The study found a shift in the autotrophic community from picoeukaryotes dominating in summer to an increase of Synechococcus by fall. Additionally, a decline in biopolymers concentrations was observed along with increasing microbial diversity and a community shift towards fewer polymer-degrading genera in fall.
ENVIRONMENTAL MICROBIOLOGY
(2022)
Article
Microbiology
Charles Bachy, Lisa Sudek, Change Jae Choi, Charlotte A. Eckmann, Eva-Maria Noethig, Katja Metfies, Alexandra Z. Worden
Summary: There are critical questions regarding the abundance and export of picophytoplankton in the Arctic. This study analyzes samples from the Fram Strait and reveals the importance of the prasinophyte Micromonas in the Arctic marine ecosystem, despite its small size.
Article
Environmental Sciences
Julia Oelker, Svetlana N. Losa, Andreas Richter, Astrid Bracher
Summary: UV radiation has significant impacts on the biogeochemical cycling in the ocean and the release of trace gases into the atmosphere. However, the current monitoring of UV radiation in the ocean is mostly done indirectly. Researchers have developed a method using the TROPOMI sensor to directly estimate the diffuse attenuation coefficients in different wavelength ranges, providing a new approach for global long-term monitoring.
FRONTIERS IN MARINE SCIENCE
(2022)
Article
Limnology
Simon Ramondenc, Eva-Maria Nothig, Lili Hufnagel, Eduard Bauerfeind, Kathrin Busch, Nadine KnUppel, Angelina Kraft, Franz Schroter, Miriam Seifert, Morten H. Iversen
Summary: The collection of zooplankton swimmers and sinkers in time-series sediment traps provides unique insight into year-round and interannual trends in zooplankton population dynamics. The study investigated zooplankton composition based on swimmers and sinkers collected by sediment traps, displaying seasonal and interannual variations in dominant zooplankton groups.
LIMNOLOGY AND OCEANOGRAPHY
(2023)
Article
Meteorology & Atmospheric Sciences
M. Wendisch, M. Brueckner, S. Crewell, A. Ehrlich, J. Notholt, C. Luepkes, A. Macke, J. P. Burrows, A. Rinke, J. Quaas, M. Maturilli, V. Schemann, M. D. Shupe, E. F. Akansu, C. Barrientos-Velasco, K. Baerfuss, A-M Blechschmidt, K. Block, I. Bougoudis, H. Bozem, C. Boeckmann, A. Bracher, H. Bresson, L. Bretschneider, M. Buschmann, D. G. Chechin, J. Chylik, S. Dahlke, H. Deneke, K. Dethloff, T. Donth, W. Dorn, R. Dupuy, K. Ebell, U. Egerer, R. Engelmann, O. Eppers, R. Gerdes, R. Gierens, I. V. Gorodetskaya, M. Gottschalk, H. Griesche, V. M. Gryanik, D. Handorf, B. Harm-Altstaedter, J. Hartmann, M. Hartmann, B. Heinold, A. Herber, H. Herrmann, G. Heygster, I. Hoeschel, Z. Hofmann, J. Hoelemann, A. Huenerbein, S. Jafariserajehlou, E. Jaekel, C. Jacobi, M. Janout, F. Jansen, O. Jourdan, Z. Juranyi, H. Kalesse-Los, T. Kanzow, R. Kaethner, L. L. Kliesch, M. Klingebiel, E. M. Knudsen, T. Kovacs, W. Koertke, D. Krampe, J. Kretzschmar, D. Kreyling, B. Kulla, D. Kunkel, A. Lampert, M. Lauer, L. Lelli, A. von Lerber, O. Linke, U. Loehnert, M. Lonardi, S. N. Losa, M. Losch, M. Maahn, M. Mech, L. Mei, S. Mertes, E. Metzner, D. Mewes, J. Michaelis, G. Mioche, M. Moser, K. Nakoudi, R. Neggers, R. Neuber, T. Nomokonova, J. Oelker, I. Papakonstantinou-Presvelou, F. Paetzold, V. Pefanis, C. Pohl, M. van Pinxteren, A. Radovan, M. Rhein, M. Rex, A. Richter, N. Risse, C. Ritter, P. Rostosky, V. V. Rozanov, E. Ruiz Donoso, P. Saavedra Garfias, M. Salzmann, J. Schacht, M. Schaefer, J. Schneider, N. Schnierstein, P. Seifert, S. Seo, H. Siebert, M. A. Soppa, G. Spreen, I. S. Stachlewska, J. Stapf, F. Stratmann, I. Tegen, C. Viceto, C. Voigt, M. Vountas, A. Walbroel, M. Walter, B. Wehner, H. Wex, S. Willmes, M. Zanatta, S. Zeppenfeld
Summary: The (AC)(3) project, established in 2016, collected a wealth of data on the physical, chemical, and meteorological properties of the Arctic atmosphere, cryosphere, and upper ocean. Short-term changes and long-term trends in Arctic climate parameters have been identified, such as increased atmospheric moistening, regional storm activities, winter warming in specific regions, and decreasing sea ice thickness and snow depth on sea ice. The project also made advancements in atmospheric-ocean and radiative transfer models, and discovered local marine/biogenic sources for cloud condensation nuclei and ice nucleating particles. Cross-cutting activities are being developed to further synthesize the results and answer key questions.
BULLETIN OF THE AMERICAN METEOROLOGICAL SOCIETY
(2023)
Correction
Multidisciplinary Sciences
Kathrin Busch, Beate M. Slaby, Wolfgang Bach, Antje Boetius, Ina Clefsen, Ana Colaco, Marie Creemers, Javier Cristobo, Luisa Federwisch, Andre Franke, Asimenia Gavriilidou, Andrea Hethke, Ellen Kenchington, Furu Mienis, Sadie Mills, Ana Riesgo, Pilar Rios, Emyr Martyn Roberts, Detmer Sipkema, Lucia Pita, Peter J. Schupp, Joana Xavier, Hans Tore Rapp, Ute Hentschel
NATURE COMMUNICATIONS
(2022)
Article
Meteorology & Atmospheric Sciences
Eva Alvarez, Svetlana N. Losa, Astrid Bracher, Silke Thoms, Christoph Voelker
Summary: This study improves the estimation of the absorption coefficient (aPH(lambda)) of phytoplankton in the global ocean by considering the variability caused by the content of photoprotective carotenoids (PPCs) in the phytoplankton community.
JOURNAL OF ADVANCES IN MODELING EARTH SYSTEMS
(2022)
Article
Environmental Sciences
Xuerong Sun, Robert J. W. Brewin, Shubha Sathyendranath, Giorgio Dall'Olmo, Ruth Airs, Ray Barlow, Astrid Bracher, Vanda Brotas, Malika Kheireddine, Tarron Lamont, Emilio Maranon, Xose Anxelu G. Moran, Dionysios E. Raitsos, Fang Shen, Gavin H. Tilstone
Summary: Understanding the response of phytoplankton to climate change is crucial, and satellite remote sensing of ocean colour is the only means of monitoring phytoplankton at large scales. However, addressing ambiguity in ocean colour signal is necessary for developing algorithms for climate change studies. Enriching ocean colour data with sea surface temperature information can help tackle this issue.
REMOTE SENSING OF ENVIRONMENT
(2023)
Article
Environmental Sciences
Perumthuruthil Suseelan Vishnu, Hongyan Xi, Justin Del Bel Belluz, Midhun Shah Hussain, Astrid Bracher, Maycira Costa
Summary: Monitoring the spatial and seasonal dynamics of phytoplankton functional types in coastal oceans is important for understanding fisheries production, water quality changes, and carbon export. This study used OLCI imagery and CHEMTAX software to characterize the seasonal dynamics of major phytoplankton functional types on the west coast of Canada. The results showed reliable performance for diatoms and raphidophytes, and the best performance for total chlorophyll-a concentration. The study also observed spring and fall diatom blooms and localized summer raphidophyte blooms.
FRONTIERS IN MARINE SCIENCE
(2022)
Article
Multidisciplinary Sciences
Moritz K. Lehmann, Daniela Gurlin, Nima Pahlevan, Krista Alikas, Janet Anstee, Sundarabalan V. Balasubramanian, Claudio C. F. Barbosa, Caren Binding, Astrid Bracher, Mariano Bresciani, Ashley Burtner, Zhigang Cao, Arnold G. Dekker, Courtney Di Vittorio, Nathan Drayson, Reagan M. Errera, Virginia Fernandez, Dariusz Ficek, Cedric G. Fichot, Peter Gege, Claudia Giardino, Anatoly A. Gitelson, Steven R. Greb, Hayden Henderson, Hiroto Higa, Abolfazl Irani Rahaghi, Cedric Jamet, Dalin Jiang, Thomas Jordan, Kersti Kangro, Jeremy A. Kravitz, Arne S. Kristoffersen, Raphael Kudela, Lin Li, Martin Ligi, Hubert Loisel, Steven Lohrenz, Ronghua Ma, Daniel A. Maciel, Tim J. Malthus, Bunkei Matsushita, Mark Matthews, Camille Minaudo, Deepak R. Mishra, Sachidananda Mishra, Tim Moore, Wesley J. Moses, Ha Nguyen, Evlyn M. L. M. Novo, Stefani Novoa, Daniel Odermatt, David M. O'Donnell, Leif G. Olmanson, Michael Ondrusek, Natascha Oppelt, Sylvain Ouillon, Waterloo Pereira Filho, Stefan Plattner, Antonio Ruiz Verdu, Salem I. Salem, John F. Schalles, Stefan G. H. Simis, Eko Siswanto, Brandon Smith, Ian Somlai-Schweiger, Mariana A. Soppa, Evangelos Spyrakos, Elinor Tessin, Hendrik J. van der Woerd, Andrea Vander Woude, Ryan A. Vandermeulen, Vincent Vantrepotte, Marcel R. Wernand, Mortimer Werther, Kyana Young, Linwei Yue
Summary: The development of algorithms for remote sensing of water quality requires a large amount of in situ data to consider the bio-geo-optical diversity of inland and coastal waters. The GLORIA dataset includes 7,572 curated hyperspectral remote sensing reflectance measurements at 1 nm intervals within the 350 to 900 nm wavelength range, contributed by researchers affiliated with 59 institutions worldwide. This dataset provides a comprehensive reference for practitioners planning similar measurements and enables scientific and technological advancement towards operational regional and global water quality monitoring.
Article
Geosciences, Multidisciplinary
Andre Valente, Shubha Sathyendranath, Vanda Brotas, Steve Groom, Michael Grant, Thomas Jackson, Andrei Chuprin, Malcolm Taberner, Ruth Airs, David Antoine, Robert Arnone, William M. Balch, Kathryn Barker, Ray Barlow, Simon Belanger, Jean-Francois Berthon, Yngve Borsheim, Astrid Bracher, Vittorio Brando, Robert J. W. Brewin, Elisabetta Canuti, Francisco P. Chavez, Andres Cianca, Herve Claustre, Lesley Clementson, Richard Crout, Afonso Ferreira, Scott Freeman, Robert Frouin, Carlos Garcia-Soto, Stuart W. Gibb, Ralf Goericke, Richard Gould, Nathalie Guillocheau, Stanford B. Hooker, Chuamin Hu, Mati Kahru, Milton Kampel, Holger Klein, Susanne Kratzer, Raphael Kudela, Jesus Ledesma, Steven Lohrenz, Hubert Loisel, Antonio Mannino, Victor Martinez-Vicente, Patricia Matrai, David McKee, Brian G. Mitchell, Tiffany Moisan, Enrique Montes, Frank Muller-Karger, Aimee Neeley, Michael Novak, Leonie O'Dowd, Michael Ondrusek, Trevor Platt, Alex J. Poulton, Michel Repecaud, Rudiger Roettgers, Thomas Schroeder, Timothy Smyth, Denise Smythe-Wright, Heidi M. Sosik, Crystal Thomas, Rob Thomas, Gavin Tilstone, Andreia Tracana, Michael Twardowski, Vincenzo Vellucci, Kenneth Voss, Jeremy Werdell, Marcel Wernand, Bozena Wojtasiewicz, Simon Wright, Giuseppe Zibordi, Sukru Besiktepe
Summary: This article presents a global in situ data set for validating ocean colour products. The data set includes various observation variables and has undergone homogenization, quality control, and merging processes.
EARTH SYSTEM SCIENCE DATA
(2022)
Proceedings Paper
Geography, Physical
M. A. Soppa, D. A. Dinh, B. Silva, F. Steinmetz, L. Alvarado, A. Bracher
Summary: This work investigates the potential of DESIS hyperspectral data for water color applications and presents a comparison with other sensor data. Examples of mapping water quality parameters in different ecosystems are provided.
1ST DESIS USER WORKSHOP - IMAGING SPECTROMETER SPACE MISSION, CALIBRATION AND VALIDATION, APPLICATIONS, METHODS
(2022)
Article
Ecology
Yanan Zhao, Dennis Booge, Christa A. Marandino, Cathleen Schlundt, Astrid Bracher, Elliot L. Atlas, Jonathan Williams, Hermann W. Bange
Summary: Our understanding of the biogeochemical cycling of dimethyl sulfide (DMS) in the Peruvian upwelling system is still limited. We conducted oceanic and atmospheric measurements of DMS in this region during two shipborne cruises in December 2012 and October 2015. DMS concentrations in surface waters were influenced by nutrient availability, and no elevated concentrations were found in the oxygen minimum zone off Peru. DMS, DMSP, and DMSO may act as radical scavengers, supported by their negative correlations with NVP ratios. Atmospheric DMS concentrations varied significantly but were primarily driven by seawater DMS. The Peruvian upwelling region was identified as a source of atmospheric DMS, but emissions were moderate compared to adjacent regions.
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)
