Article
Geosciences, Multidisciplinary
C. Hillaire-Marcel, A. de Vernal, Y. Rong, P. Roberge, T. Song
Summary: Based on the analysis of fish otolith assemblages from surface sediments of the Lomonosov Ridge in the Arctic Ocean, it has been found that low sedimentation rates and the sorting of fine sediments result in the mixing of Holocene populations at the sediment surface. The presence of sedimentary hiatus during the last glacial maximum allows for the presence of Marine Isotope Stage (MIS) 3 or older specimens in the surface sediment. The study also shows that C-14-stratigraphies from underlying sediments reflect the mixing of Holocene and MIS 3 or older populations, which invalidates continuous age-depth inferences based on C-14 ages. Therefore, caution is needed when using C-14 chronologies for paleoceanographic reconstructions in low sediment accumulation rate environments like the central Arctic Ocean.
GEOPHYSICAL RESEARCH LETTERS
(2022)
Article
Environmental Sciences
Gennady Platov, Dina Iakshina, Elena Golubeva
Summary: The characteristics of eddy mass transport in the Arctic shelf seas are estimated based on the parameters of a large-scale flow. Numerical simulation of the Kara Sea is used to obtain the results, which are considered as a statistical sample and analyzed using sensitivity study and clustering methods. Functional dependencies are obtained and used to evaluate the characteristics of eddy mass transport.
Article
Environmental Sciences
Guojing Xing, Wei Shen, Meng Wei, Huan Li, Weizeng Shao
Summary: This study focused on the inter-annual variation in waves and mesoscale eddies in the Arctic Ocean. The waves were simulated using a numerical wave model and validated with long-term wind and sea level data. The results showed that the wave characteristics in the Arctic are changing under global climate change, with the lowest wave heights in summer and highest in winter. The activity of mesoscale eddies was found to be related to wave growth.
Article
Oceanography
Shun Yang, Haibin Song, Bernard Coakley, Kun Zhang
Summary: In recent years, the Arctic Ocean has experienced a significant decrease in sea ice cover, leading to enhanced turbulent mixing and eddy activity. This study uses seismic reflection and current velocity data to identify mesoscale eddies in the ice-free Chukchi Borderlands of the western Arctic Ocean. The findings highlight the enhanced mixing at the edges of these eddies, which can increase the upward heat flux and potentially accelerate the melting of surface sea ice.
JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
(2023)
Article
Multidisciplinary Sciences
Pauline Snoeijs-Leijonmalm, Hauke Flores, Serdar Sakinan, Nicole Hildebrandt, Anders Svenson, Giulia Castellani, Kim Vane, Felix C. Mark, Celine Heuze, Sandra Tippenhauer, Barbara Niehoff, Joakim Hjelm, Jonas Hentati Sundberg, Fokje L. Schaafsma, Ronny Engelmann
Summary: The retreating ice cover of the Central Arctic Ocean has raised concerns about the future fisheries in the region. However, little is known about the presence of harvestable fish stocks in this vast ecosystem. A recent study found a 3170-kilometer-long deep scattering layer (DSL) with zooplankton, small fish, and low abundances of Atlantic cod in the Atlantic water layer of the Eurasian Basin. The potential fish abundance was found to be far below sustainable levels and is expected to remain so due to the low productivity of the Central Arctic Ocean.
Article
Environmental Sciences
L. Oziel, V Schourup-Kristensen, C. Wekerle, J. Hauck
Summary: Nitrate supply in the Central Arctic Ocean is disproportionately contributed by the pan-Arctic continental slope, intensified by lateral eddy transport and upwelling. However, nutrient supply is decreasing in the central basins, indicating that the CAO is still shifting from light to nutrient limitation.
GLOBAL BIOGEOCHEMICAL CYCLES
(2022)
Article
Environmental Sciences
Yujun Liu, Yijun He
Summary: In recent years, the process of Atlantification in the warming Arctic Ocean has received increasing attention. This study focused on the Arctic Atlantic inflow zone (AAZ) and used reanalysis data and in-situ float data to investigate the impact of Arctic strong cyclones (ASCs) on the upper ocean. The findings show that ASCs disrupt the cold halocline layer, facilitate the transport of heat from the deep Atlantic Water, and intensify the intrusion of the Barents Sea Branch, thereby enhancing the process of Atlantification in the Arctic Ocean.
ENVIRONMENTAL RESEARCH LETTERS
(2023)
Article
Geosciences, Multidisciplinary
Mario Hoppmann, Ivan Kuznetsov, Ying-Chih Fang, Benjamin Rabe
Summary: This article presents a unique observational dataset of upper ocean temperature and salinity collected by buoys installed on ice floes in the Arctic. The dataset fills knowledge gaps regarding mesoscale and smaller-scale processes and has the potential to contribute to submesoscale process studies. It is expected to provide significant insights into ocean processes and contribute to the validation of high-resolution numerical simulations.
EARTH SYSTEM SCIENCE DATA
(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)
Article
Oceanography
Yusuke Kawaguchi, Zoe Koenig, Daiki Nomura, Mario Hoppmann, Jun Inoue, Ying-Chih Fang, Kirstin Schulz, Michael Gallagher, Christian Katlein, Marcel Nicolaus, Benjamin Rabe
Summary: This study examines the mixing processes and sea ice drift in the ice-ocean boundary layer (IOBL) near the geographic North Pole. Measurements of ice motion, currents, hydrography, and turbulence were conducted to quantify the transport of momentum, heat, and salt in the IOBL. The study provides important insights into Arctic climate change.
JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
(2022)
Article
Oceanography
Shun Yang, Haibin Song, Bernard Coakley, Kun Zhang, Wenhao Fan
Summary: The Arctic Ocean is known for its mesoscale eddies, and this study provides the first seismic imaging of the water column in the Arctic Ocean. The observed lens-shaped mesoscale eddy exhibited specific features and movement characteristics, such as a rigid core with a rotation period of approximately 26 hours. The seismic observations also revealed submesoscale spiral bands near the boundaries of the eddy.
JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
(2022)
Article
Multidisciplinary Sciences
Fange Yue, Helene Angot, Byron Blomquist, Julia Schmale, Clara J. M. Hoppe, Ruibo Lei, Matthew D. Shupe, Liyang Zhan, Jian Ren, Hailong Liu, Ivo Beck, Dean Howard, Tuija Jokinen, Tiia Laurila, Lauriane Quelever, Matthew Boyer, Tuukka Petaja, Stephen Archer, Ludovic Bariteau, Detlev Helmig, Jacques Hueber, Hans-Werner Jacobi, Kevin Posman, Zhouqing Xie
Summary: Based on observations and modeling, it is found that atmospheric mercury in the Arctic is mainly derived from oceanic evasion, particularly in the Marginal Ice Zone (MIZ). This regional process could be the main cause for the summertime peak in mercury concentrations. With rapid Arctic warming and MIZ expansion, oceanic mercury evasion may become more significant.
NATURE COMMUNICATIONS
(2023)
Article
Multidisciplinary Sciences
Benjamin Heutte, Nora Bergner, Ivo Beck, Helene Angot, Lubna Dada, Lauriane L. J. Quelever, Tiia Laurila, Matthew Boyer, Zoe Brasseur, Kaspar R. Daellenbach, Silvia Henning, Chongai Kuang, Markku Kulmala, Janne Lampilahti, Markus Lampimaeki, Tuukka Petaja, Matthew D. Shupe, Mikko Sipila, Janek Uin, Tuija Jokinen, Julia Schmale
Summary: The Arctic environment is undergoing rapid transformation due to climate change, with aerosols playing a crucial but uncertain role in these changes. However, comprehensive year-round measurements of Arctic aerosol characteristics are limited, hindering the improvement of climate modeling for the future Arctic and global climate.
Article
Oceanography
Colin A. Stedmon, Rainer M. W. Amon, Dorothea Bauch, Astrid Bracher, Rafael Goncalves-Araujo, Mario Hoppmann, Richard Krishfield, Samuel Laney, Benjamin Rabe, Heather Reader, Mats A. Granskog
Summary: This study highlights the potential of dissolved organic matter (DOM) as a tracer in the Arctic Ocean, particularly in the halocline layer. By measuring the fluorescence levels of DOM, distinct contributions from different sources can be distinguished and help evaluate ocean circulation patterns.
JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
(2021)
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)
