Article
Environmental Sciences
Evgeniy Yakushev, Anna Gebruk, Alexander Osadchiev, Svetlana Pakhomova, Amy Lusher, Anfisa Berezina, Bert van Bavel, Elena Vorozheikina, Denis Chernykh, Glafira Kolbasova, Ilia Razgon, Igor Semiletov
Summary: Plastic pollution is recognized as a global threat to marine ecosystems, habitats, and wildlife, with remote locations such as the Arctic Ocean being impacted. This study analyzes microplastic distribution in the Eurasian Arctic through water samples, identifying two major sources of pollution: Atlantic surface water and discharge plumes of the Great Siberian Rivers.
COMMUNICATIONS EARTH & ENVIRONMENT
(2021)
Article
Geochemistry & Geophysics
A. J. Dickson, M. Davies, A. S. Cohen, M. -l. Bagard
Summary: During the early Paleogene, the closure of seaways that connected the Arctic Ocean to the global ocean resulted in severe hydrographic restriction. New osmium isotope data from organic-rich sediments in the central Arctic Ocean during the Early-Middle Eocene show that the isotopic composition of osmium in Arctic seawater began to differ from that of the global ocean after the Eocene Thermal Maximum 2 hyperthermal event, likely due to the gradual closure of seaways connecting the two oceans.
GEOCHEMICAL PERSPECTIVES LETTERS
(2022)
Article
Environmental Sciences
Yan Lin, Minggang Cai, Min Chen, Peng Huang, Ruibo Lei, Meng Chen, Dawei Gui, Hongwei Ke
Summary: Polycyclic aromatic hydrocarbons (PAHs) in the Arctic Ocean primarily enter through local sources (such as river input and ice melting) rather than long-range transport, as revealed by this study. The study highlights the importance of Eurasian local inputs in supplying PAHs to the Arctic Ocean.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Review
Oceanography
Jeffrey S. Grabon, John M. Toole, An T. Nguyen, Richard A. Krishfield
Summary: The study analyzed the properties and circulation changes of the Atlantic Water (AW) Layer in the Arctic Subpolar gyre for the period 2004-2017. A surge of AW was observed two years into the state estimate, leading to alterations in circulation patterns. The analysis also revealed a new quasi-steady AW circulation from 2010 onwards.
PROGRESS IN OCEANOGRAPHY
(2021)
Article
Meteorology & Atmospheric Sciences
Shuoyi Ding, Bingyi Wu, Wen Chen
Summary: This study explores the dominant characteristics of interannual variations in autumn Arctic sea ice concentration and the impacts of September-October mean sea ice anomalies in the East Siberian-Chukchi-Beaufort Seas on winter Eurasian climate variability. The results show that decreased sea ice concentration in this region leads to tropospheric warming and positive geopotential height anomalies, affecting atmospheric circulation patterns and temperatures over Eurasia in the winter months.
JOURNAL OF CLIMATE
(2021)
Article
Oceanography
Annie Foppert, Stephen R. Rintoul, Sarah G. Purkey, Nathalie Zilberman, Taiyo Kobayashi, Jean-Baptiste Sallee, Esmee M. van Wijk, Luke O. Wallace
Summary: This study highlights the significance of Antarctic Bottom Water (AABW) in the climate system and the new perspective provided by the Deep Argo floats array for observing and studying this water mass. The research reveals the significant spatiotemporal variability in the properties of AABW, which plays a crucial role in climate change.
JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
(2021)
Article
Oceanography
Salar Karam, Celine Heuze, Vasco Mueller, Yixi Zheng
Summary: Based on hydrographic profiles in the Arctic Ocean, it is found that Canada Basin Deep Water (CBDW), which is relatively warm and salty, flows intermittently into the Amundsen Basin along the Gakkel Ridge. The driving mechanisms for CBDW inflow into the Amundsen Basin remain unclear, but density-driven overflows and pressure gradient across the Lomonosov Ridge are suggested to be unlikely drivers. Furthermore, multiple deep eddies containing CBDW are discovered in the Amundsen Basin, indicating the efficient trapping and transport of CBDW over long distances.
JOURNAL OF PHYSICAL OCEANOGRAPHY
(2023)
Article
Multidisciplinary Sciences
Alexander Osadchiev, Roman Sedakov, Dmitry Frey, Alexandra Gordey, Vladimir Rogozhin, Zinaida Zabudkina, Eduard Spivak, Ekaterina Kuskova, Andrey Sazhin, Igor Semiletov
Summary: The Kara Sea receives a significant amount of freshwater discharge from the Ob and Yenisei rivers, contributing to the freshwater balance of the Arctic Ocean. In this study, it was found that late autumn convection reduces friction between the freshwater plume and the ocean, allowing it to form a buoyancy-driven coastal current below sea ice. This current transports a large volume of freshwater to the Laptev Sea during the winter months.
SCIENTIFIC REPORTS
(2023)
Article
Meteorology & Atmospheric Sciences
Anais Bretones, Kerim H. Nisancioglu, Mari F. Jensen, Ailin Brakstad, Shuting Yang
Summary: While the retreat of Arctic sea ice has become widespread, the potential weakening of the Atlantic meridional overturning circulation (AMOC) in response to global warming is still being debated. A long simulation study using the EC-Earth-Parallel Ice Sheet Model (PISM) climate model investigated the link between changes in Arctic sea ice cover and AMOC strength. The results showed that as the winter sea ice edge retreated, the Arctic meridional overturning circulation (ArMOC) strengthened, but the mixing in the Labrador and Greenland Seas reduced, causing a weakening of the AMOC. The location of deep-water formation was found to play a decisive role in the structure and strength of the ArMOC.
JOURNAL OF CLIMATE
(2022)
Article
Geography, Physical
Linsen Dong, Leonid Polyak, Xiaotong Xiao, Stefanie Brachfeld, Yanguang Liu, Xuefa Shi, Xisheng Fang, Yazhi Bai, Aimei Zhu, Chaoxin Li, Song Zhao, Dong Wu, Chunjuan Wang
Summary: This study investigates sediment cores in the Arctic Ocean to understand the changes in circulation and deposition during glacial and interglacial periods. The results show that the sediment characteristics vary between different glaciation periods, indicating different impacts on the Arctic Ocean including ice-sheet sizes and oceanic circulation.
GLOBAL AND PLANETARY CHANGE
(2022)
Article
Environmental Sciences
Chaofeng Wang, Xiaoyu Wang, Zhiqiang Xu, Qiang Hao, Yuan Zhao, Wuchang Zhang, Tian Xiao
Summary: Information on variations in tintinnid community structure in different water masses in the Arctic Basin is limited. A study conducted in summer 2020 investigated tintinnid diversity and vertical distribution in the Arctic Ocean. The results showed that each water mass had a unique tintinnid community structure, with certain species potentially serving as indicators of specific water masses. It was also found that the occurrence of North Pacific tintinnid in the Pacific Summer Water may be attributed to increased Pacific Inflow Water. Further research is needed to understand the lasting period of this species and its ability to establish a local population under rapid Arctic warming.
FRONTIERS IN MARINE SCIENCE
(2022)
Article
Geosciences, Multidisciplinary
A. Solodoch, A. L. Stewart, A. McC. Hogg, A. K. Morrison, A. E. Kiss, A. F. Thompson, S. G. Purkey, L. Cimoli
Summary: This study uses a global high-resolution ocean/sea-ice simulation and passive tracer deployments to examine the export pathways of Antarctic Bottom Water (AABW). The results show that AABW from different source regions are blended during their export, with Weddell Sea- and Prydz Bay-sourced AABW mainly exported to the Atlantic and Indian Oceans, while Ross Sea- and Adelie Land-sourced AABW mainly exported to the Pacific Ocean. This has important implications for the three-dimensional structure of the global overturning circulation.
GEOPHYSICAL RESEARCH LETTERS
(2022)
Article
Multidisciplinary Sciences
Seung-Kyu Kim, Ji-Su Kim, So-Young Kim, Nan-Seon Song, Hyoung Sul La, Eun Jin Yang
Summary: In order to explain the unexpectedly low plastic loads at the ocean's surface, unidentified sinks for plastic waste must be located. This study examines the microplastic budget in the western Arctic Ocean and finds that Arctic sediments function as important sinks for missing microplastics. The study also suggests that the slower increase in plastic burial compared to plastic production indicates more pollution in the Arctic in the future.
Article
Geology
Yuxin Zhou, Jerry McManus
Summary: This paper investigates in detail a layer of red sediments deposited along the northwestern Atlantic Ocean 125,000 years ago. It finds that this deposit was a glacial outburst event similar to the one that occurred 8,200 years ago. The freshwater discharge associated with this event may explain several global abrupt changes, including a reduction in North Atlantic Deep Water and the resurgence of Antarctic Bottom Water. The study suggests that the mechanism behind this event is a significant part of the deglacial sequence.
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)
Review
Environmental Sciences
Martin Jakobsson, Larry A. Mayer
Summary: The interaction between the ocean, cryosphere, and seafloor is vital for understanding processes such as deep ocean mixing, glacier dynamics, and sea-level rise. However, there is a critical knowledge gap in accurately mapping the seafloor in Polar regions, which needs to be addressed to improve predictions and understanding of these processes.
FRONTIERS IN MARINE SCIENCE
(2022)
Article
Geochemistry & Geophysics
Gabriel West, Andreas Nilsson, Alexis Geels, Martin Jakobsson, Matthias Moros, Francesco Muschitiello, Christof Pearce, Ian Snowball, Matt O'Regan
Summary: This study investigates the behavior of the geomagnetic field in polar regions during the late Holocene period. By analyzing well-dated sediment cores from the Chukchi Sea, Arctic Ocean, the authors provide valuable insights into the changes in the geomagnetic field in the Arctic over the past few thousand years.
GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS
(2022)
Article
Geosciences, Multidisciplinary
E. Chuvilin, B. Bukhanov, A. Yurchenko, D. Davletshina, N. Shakhova, E. Spivak, V Rusakov, O. Dudarev, N. Khaustova, A. Tikhonova, O. Gustafsson, T. Tesi, J. Martens, M. Jakobsson, M. Spasennykh, I Semiletov
Summary: This article mainly introduces the degradation of subsea permafrost in the Arctic shelf and its impact on methane release, discusses new knowledge about the release of CH4 from the East Siberian Arctic Shelf (ESAS), and points out that there are still knowledge gaps in many aspects of the ESAS that need further research.
MARINE AND PETROLEUM GEOLOGY
(2022)
Article
Geography, Physical
Anne Jennings, Brendan Reilly, John Andrews, Kelly Hogan, Maureen Walczak, Martin Jakobsson, Joseph Stoner, Alan Mix, Keith W. Nicholls, Matt O'Regan, Maarten A. Prins, Simon R. Troelstra
Summary: Based on sediment cores and geophysical data, this study presents the characteristics of sub and pro ice shelf environments in NW Greenland. The research reconstructs the glacial and oceanographic history over the last 11,000 years and uses the modern ice shelf sediment facies to infer the past presence of ice shelves in northern Nares Strait.
QUATERNARY SCIENCE REVIEWS
(2022)
Article
Multidisciplinary Sciences
Henning Akesson, Mathieu Morlighem, Johan Nilsson, Christian Stranne, Martin Jakobsson
Summary: This study suggests that the Petermann Ice Shelf in northwest Greenland is unlikely to recover once a future breakup occurs. Even if the ocean cools, ice discharge from the glacier may still increase. This implies that continued ocean warming could lead to high discharge from polar ice sheets.
NATURE COMMUNICATIONS
(2022)
Article
Geosciences, Multidisciplinary
Amy Hsieh, Shahin E. Dashtgard, Pei-Ling Wang, Chorng-Shern Horng, Chih-Chieh Su, Andrew T. Lin, Romain Vaucher, Ludvig Lowemark
Summary: The Taiwan Western Foreland Basin was traditionally believed to have received sediment mainly from Eurasia until the late Pliocene-early Pleistocene. However, new research indicates that major sediment contributions from Taiwan occurred much earlier, and were closely related to the uplift and initial emergence of the Taiwan orogen. This study demonstrates that the Taiwan orogen became a significant source of sediment to the Western Foreland Basin during the Miocene-Pliocene transition, about two million years earlier than previously recognized.
Article
Environmental Sciences
Tsai-Wen Lin, Stefanie Kaboth-Bahr, Andre Bahr, Kweku Afrifa Yamoah, Chih-Chieh Su, Liang-Chi Wang, Pei-Ling Wang, Ludvig Loewemark
Summary: Human activities have caused significant changes in sedimentation processes and vegetation cover in lake catchments. However, the time needed for anthropogenically disturbed areas to return to their natural state through environmental protection programs is still uncertain. This study focuses on the Cueifong Lake catchment in Taiwan and uses a multi-proxy approach to investigate major environmental disturbances such as logging and forest fires. The results suggest that it may take more than 50 years for the sedimentary regime to fully recover from logging activities, while the vegetation composition may shift irreversibly towards an algae-dominant environment.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Geosciences, Multidisciplinary
Amy I. I. Hsieh, Romain Vaucher, Ludvig Lowemark, Shahin E. Dashtgard, Chorng-Shern Horng, Andrew T. T. Lin, Christian Zeeden
Summary: This study evaluates how the evolving Taiwan orogen influences the preservation of astronomical climate forcing in the shallow-marine sedimentary strata of the Taiwan Western Foreland Basin. The findings show that long-term astronomical cycles were poorly preserved during the early stages of increased East Asian Summer Monsoon due to wave reworking. However, from 5.4 to 3.15 Ma, the development of the basin and the protection provided by Taiwan enhanced the preservation of astronomical climate variability.
PALEOCEANOGRAPHY AND PALEOCLIMATOLOGY
(2023)
Article
Geology
Romain Vaucher, Antoine Dillinger, Amy I. Hsieh, Wen-Rong Chi, Ludvig Lowemark, Shahin E. Dashtgard
Summary: This paper reports on the sedimentary succession of the Pleistocene Cholan Formation in Taiwan, which provides insights into the deposition processes of storm-flood delta successions. The study reveals the occurrence of tropical cyclone beds and post-depositional deformation features, and highlights the differences in sedimentary structures compared to other storm-flood delta successions.
DEPOSITIONAL RECORD
(2023)
Article
Geosciences, Multidisciplinary
Sergey Nikiforov, Roman Ananiev, Martin Jakobsson, Evgeny Moroz, Sergey Sokolov, Nikolay Sorokhtin, Nikolay Dmitrevsky, Elena Sukhikh, Igor Chickiryov, Yulia Zarayskaya, Anatoly Razumovskiy, Igor Semiletov
Summary: Based on data acquired during cruises of the RV Akademik Nikolaj Strakhov in 2018-2021, the distribution of submarine glacial landforms in the central part of the Pechora shelf area is revealed. The extent of the ice sheet during the Last Glacial Maximum (LGM) is proposed based on moraines and the distribution of glacial lineations. The mapped glacial landforms indicate the presence of an ice sheet in the area, while the Pechora basin was characterized by a cryogenic subaerial landscape.
Article
Environmental Sciences
Henrieka Detlef, Matt O'Regan, Christian Stranne, Mads Mork Jensen, Marianne Glasius, Thomas M. M. Cronin, Martin Jakobsson, Christof Pearce
Summary: According to climate models, the Lincoln Sea will be the last refuge of perennial Arctic sea-ice in a warming climate, but recent observations show concerns about its long-term stability. A study using marine proxy evidence reveals that perennial sea-ice disappeared in the southern Lincoln Sea during the Early Holocene, suggesting a widespread shift to seasonal sea-ice in the Arctic Ocean. The findings indicate that even if global temperature rise is limited to 2 degrees C compared to pre-industrial levels, the southern Lincoln Sea is likely to transition to seasonal sea-ice due to anthropogenic warming.
COMMUNICATIONS EARTH & ENVIRONMENT
(2023)
Article
Geosciences, Multidisciplinary
J. Muchowski, L. Arneborg, L. Umlauf, P. Holtermann, E. Eisbrenner, C. Humborg, M. Jakobsson, C. Stranne
Summary: Diapycnal mixing affects the vertical transport rates of salt, heat, and other dissolved substances, which are crucial for the overturning circulation and ecosystem functioning in marine systems. This study investigates the overall impact of non-tidal flow over multiple small-scale bathymetric features on a strongly-stratified density interface in a coastal region. The findings highlight the importance of rough small-scale bathymetric features for the vertical transport of salt in coastal areas.
GEOPHYSICAL RESEARCH LETTERS
(2023)
Article
Geography, Physical
Johan Nilsson, Eef van Dongen, Martin Jakobsson, Matt O'Regan, Christian Stranne
Summary: Using a conceptual model, this study investigates the impact of hydraulically controlled exchange flows in silled fjords on the relationship between glacier melt and the features of warm intermediate Atlantic Water (AW) outside the fjords. It is found that changes in the AW interface height, temperature, and glacially modified water production can force an exchange flow into the hydraulic regime. In this regime, heat transport across the sill becomes a limiting factor for basal melt and reduces its sensitivity to changes in AW temperature. The model results are compared with observations from glaciers in northern Greenland.
Article
Environmental Sciences
Christian Stranne, Matt O'Regan, Wei-Li Hong, Volker Bruchert, Marcelo Ketzer, Brett F. Thornton, Martin Jakobsson
Summary: Continental margin sediments contain large amounts of methane stored as gas hydrate. Ocean warming may release substantial amounts of methane, and the process of anaerobic oxidation of methane is often neglected in current projections. A study using a coupled model suggests that for high seafloor warming rates, the efficiency of anaerobic oxidation of methane is low, and it has a minimal mitigating effect on seafloor methane emissions.
COMMUNICATIONS EARTH & ENVIRONMENT
(2022)
Article
Meteorology & Atmospheric Sciences
Jaclyn Clement Kinney, Karen M. Assmann, Wieslaw Maslowski, Goran Bjork, Martin Jakobsson, Sara Jutterstrom, Younjoo J. Lee, Robert Osinski, Igor Semiletov, Adam Ulfsbo, Irene Wahlstrom, Leif G. Anderson
Summary: Substantial amounts of nutrients and carbon enter the Arctic Ocean from the Pacific Ocean through the Bering Strait, distributed over three main pathways. The circulation and transport of water masses in the Chukchi Sea and Herald Canyon have significant impacts on nutrient concentrations. Numerical modelling and data analysis are used to study the flow patterns and nutrient fluxes in this region. The findings highlight the importance of long-term monitoring to understand the temporal variability and potential trends.
Article
Oceanography
Pernille Tonnesen, Shane Gero
Summary: Studying the behavior of deep-sea animals is challenging, but animal-borne camera tags may help understand predator-prey interactions. Research showed that camera-associated white light may affect foraging behavior, but has minimal long-term fitness impact on sperm whales. However, this impact should be considered and monitored for longer camera tag deployments.
DEEP-SEA RESEARCH PART I-OCEANOGRAPHIC RESEARCH PAPERS
(2024)
Article
Oceanography
Sarah N. de Mendonca, Anna Metaxas
Summary: Ecological processes impact spatial patterns in abundance and distribution of megafauna. This study used spatial statistics to identify significant megafaunal patterns in the Laurentian Channel Marine Protected Area. The patterns varied among taxa and were related to geological factors. The study highlights the importance of considering fine-scale patterns and provides insights for ecological research, monitoring, and conservation in deep-sea ecosystems.
DEEP-SEA RESEARCH PART I-OCEANOGRAPHIC RESEARCH PAPERS
(2024)
