Article
Meteorology & Atmospheric Sciences
Qinghua Ding, Axel Schweiger, Ian Baxter
Summary: In recent decades, Arctic climate has undergone significant changes, including pan-Arctic warming and a shift in wind patterns. Previous research suggests that these wind changes can warm the Arctic atmosphere and melt sea ice. However, the complexity of the sea ice response to these wind changes has not been fully considered. In this study, a high-resolution modeling framework is used to examine this idea more rigorously. The results show that the wind changes can effectively capture observed variability in Arctic temperature, sea ice, and radiation balance. Particularly, in the summer of 2020, a similar wind pattern led to the second-lowest sea ice extent since 1979.
JOURNAL OF CLIMATE
(2022)
Article
Environmental Sciences
Lenaig Brun, Ivane Pairaud, Ricardo Silva Jacinto, Pierre Garreau, Bernard Dennielou
Summary: This study presents observations of currents, temperature, and turbidity in the Cassidaigne canyon in the northwestern Mediterranean Sea. The circulation in this area is influenced by upwelling and downwelling-favorable winds, the Northern Current, and the local morphology. The study finds that upwellings occur under different stratification conditions and are triggered by winds stronger than 14 m/s. The mesoscale variability of the Northern Current can lead to cross currents over the canyon. Turbidity currents were also observed, indicating the importance of the canyon's internal hydrodynamics on shelf sedimentary processes.
FRONTIERS IN MARINE SCIENCE
(2023)
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
Environmental Sciences
Lorena Moreira, Anny Cazenave, Anne Barnoud, Jianli Chen
Summary: Satellite altimetry has shown that the rate of sea-level rise varies by region, being influenced mainly by changes in ocean temperature and salinity. Significant correlations between altimetry-based sea-level and modelled fingerprints of water mass redistribution have been detected in certain ocean regions.
Article
Environmental Sciences
Wen Xu, Yeqiang Shu, Dongxiao Wang, Ju Chen, Jinghong Wang, Qiang Xie, Qiang Wang, Danian Liu, Tingting Zu, Yunkai He
Summary: This study reveals the strong intraseasonal variability (ISV) features of the upper-layer current in the northern South China Sea (NSCS) based on four long-time mooring observations and altimeter data. The ISV consists of two dominant periods of 10-65 days and 65-110 days, with spatial differences primarily due to baroclinic and barotropic instabilities. The spatial distribution of upper-layer ISV is closely associated with the mesoscale eddy radius of the NSCS, with the strength of ISV inversely proportional to the eddy radius of 10-65-day ISV and directly proportional to the eddy radius of 65-110-day ISV.
FRONTIERS IN MARINE SCIENCE
(2021)
Article
Geosciences, Multidisciplinary
Wei Gong, Junhui Xing, Qingwei Meng, Lei Xing, Chong Xu, Hao Zhang
Summary: The Solomon Sea Basin is a Cenozoic back-arc spreading basin formed by the convergence system of the Pacific and Indo-Australian plates. Through the analysis of various geological data, the study reveals the structural characteristics of the basin, including an original expansion structure in the central part and a subduction-induced structure along the basin margin. The subduction and slab-pull processes have also resulted in the formation of extensional structure belts along the basin margin.
ACTA GEOLOGICA SINICA-ENGLISH EDITION
(2023)
Article
Environmental Sciences
Yingci Feng, Qunshu Tang, Jian Li, Jie Sun, Wenhuan Zhan
Summary: This study investigates internal solitary waves (ISWs) offshore of Guangdong in the northern South China Sea using high-frequency acoustic backscatter data, XBT profiles, and satellite images. It reveals that ISWs are extensively occurring in shallow waters due to the shallow solar-heated water lying on the bottom cold water in summer. The observed characteristics and dissipation processes of ISWs are consistent with both satellite data and theoretical models.
FRONTIERS IN MARINE SCIENCE
(2021)
Article
Geosciences, Multidisciplinary
Alberto Ribotti, Roberto Sorgente, Federica Pessini, Andrea Cucco, Giovanni Quattrocchi, Mireno Borghini
Summary: Since 2000, hydrological data of the Mediterranean Sea, particularly the western and central sub-basins, have been collected to study the hydrodynamics at coastal and open sea scales. A total of 1468 hydrological casts were conducted in 29 oceanographic cruises, and the data were carefully quality controlled and made available in open-access repositories. The findings of the study include staircase systems in the Tyrrhenian Sea and Algero-Provencal sub-basin, as well as the spreading of the Western Mediterranean Transient.
EARTH SYSTEM SCIENCE DATA
(2022)
Article
Geosciences, Multidisciplinary
Michele Mossa, Elvira Armenio, Mouldi Ben Meftah, Maria Francesca Bruno, Diana De Padova, Francesca De Serio
Summary: The Coastal Engineering Laboratory of DICATECh at the Polytechnic University of Bari in Italy conducts place-based research in the Mar Grande and Mar Piccolo of Taranto, providing data on hydrodynamics and water quality measurements in a complex marine ecosystem. The presence of a naval base, the largest steel mill in Europe, and an oil refinery makes this coastal system highly vulnerable. Two fixed stations have been installed to collect data on various parameters such as wind speed, temperature, salinity, currents, and waves, which are used to deepen understanding of the basin's hydrodynamic structures and characteristics.
EARTH SYSTEM SCIENCE DATA
(2021)
Article
Geography, Physical
MacKenzie E. Jewell, Jennifer K. Hutchings, Cathleen A. Geiger
Summary: Based on satellite thermal infrared imagery from January to April 2000-2020, it is found that synoptic wind patterns from migrating atmospheric highs create leads in the sea ice, leading to zonally asymmetric ice drift across the Pacific Arctic.
Article
Multidisciplinary Sciences
Christian Helanow, Neal R. Iverson, Jacob B. Woodard, Lucas K. Zoet
Summary: In this study, a process-based, three-dimensional model of glacier slip was applied to measured bed topographies, showing that considering actual glacier beds can eliminate or make rate-weakening drag insignificant, thereby unifying process-based models of slip with certain ice-sheet model parameterizations. The computed slip laws have the same form as those observed in experiments with ice dragged over deformable till, possibly pointing to a universal slip law that could simplify and improve estimations of glacier discharges to the oceans.
Article
Multidisciplinary Sciences
Hisatomo Waga, Hajo Eicken, Toru Hirawake, Yasushi Fukamachi
Summary: This study investigated the relationship between spring phytoplankton bloom types and timing of the sea-ice retreat in the changing Arctic. Results classified spring bloom types into under-ice blooms, probable under-ice blooms, and marginal ice zone blooms, showing variation in phytoplankton dynamics across the Pacific Arctic. The findings indicated a shift in phytoplankton bloom types with sea-ice retreat timing, contributing to the detection and monitoring of biophysical responses to changing environments in the Pacific Arctic.
Article
Environmental Sciences
Qian Shi, Guihua Wang
Summary: The study utilizes 17-year satellite data to analyze the quick shifting wind jet events over the South China Sea in summer. The findings reveal that the wind jet undergoes a counter-clockwise rotation from eastward to northward in about 8 days and then back to eastward in roughly 4 days. The entire cycle takes between 4 and 21 days and occurs 2-6 times every summer. Model simulations show that the wind stress curl associated with quick wind shifts deforms the double gyre in the South China Sea, leading to a weakening of the northern gyre and a northwestward movement of the center of the southern gyre. Additionally, the quick shift of the wind jet results in both negative sea surface temperature anomalies in the South China Sea and positive anomalies around the eastward current.
REMOTE SENSING OF ENVIRONMENT
(2022)
Article
Multidisciplinary Sciences
Yeonjung Lim, Seung-Jo Yang, Ilnam Kang, Jang-Cheon Cho
Summary: This article presents a monthly time-series metagenomic dataset of the microbial communities in the East Sea, which can facilitate investigations into the marine microbial ecosystems in this region. The study reveals that the East Sea exhibits different biogeochemical features under seasonal fluctuations.
Article
Meteorology & Atmospheric Sciences
Shasha Shang, Gaofeng Zhu, Jianhui Wei, Yan Li, Kun Zhang, Ruolin Li, Joel Arnault, Zhenyu Zhang, Patrick Laux, Qianya Yang, Ningpeng Dong, Lu Gao, Harald Kunstmann
Summary: Precipitation in the Three-River Headwater region has shown an increasing trend during the cold season from 1961 to 2014, with a dry-to-wet shift around the late 1980s. The increased precipitation is associated with enhanced easterly anomalies over the Tibetan Plateau and southeasterly water vapor transport. Enhanced Walker circulations and changes in sea surface temperature gradients in tropical oceans are contributing factors to the precipitation changes in the region.
JOURNAL OF CLIMATE
(2021)
Article
Multidisciplinary Sciences
Ian Joughin, Daniel Shapero, Ben Smith, Pierre Dutrieux, Mark Barham
Summary: The Pine Island Glacier in Antarctica has shown significant acceleration over the past few decades, making it the largest contributor to sea-level rise in the region. Recent acceleration is attributed to accelerated calving, independent of the processes responsible for past speedups.
Article
Geosciences, Multidisciplinary
M. G. Wearing, L. A. Stevens, P. Dutrieux, J. Kingslake
Summary: Ice-shelf basal channels are formed by concentrated submarine melting, affecting ice-shelf structural integrity. This study examines the viscous ice response to secondary flows induced by gradients in ice thickness, finding that secondary flow can stabilize basal channels in thick ice shelves. Additional research is needed to assess the impact of secondary flow on inferring basal-channel melt rates from satellite observations.
GEOPHYSICAL RESEARCH LETTERS
(2021)
Article
Multidisciplinary Sciences
Seung-Tae Yoon, Won Sang Lee, SungHyun Nam, Choon-Ki Lee, Sukyoung Yun, Karen Heywood, Lars Boehme, Yixi Zheng, Inhee Lee, Yeon Choi, Adrian Jenkins, Emilia Kyung Jin, Robert Larter, Julia Wellner, Pierre Dutrieux, Alexander T. Bradley
Summary: Direct observations from Antarctica's Pine Island Bay region reveal that glacial melt can modify heat transport and ocean processes associated with ice front retreat. The melting of the Pine Island Ice Shelf (PIIS) and its retreat have led to buttressing loss, with the primary factor being the thermocline variability at its front. This study proposes a double-gyre in Pine Island Bay that controls ocean heat input towards PIIS, suggesting the importance of reconfigurations in meltwater-driven gyres associated with moving ice boundaries.
NATURE COMMUNICATIONS
(2022)
Review
Environmental Sciences
Adele Revelard, Joaquin Tintore, Jacques Verron, Pierre Bahurel, John A. Barth, Mathieu Belbeoch, Jerome Benveniste, Pascal Bonnefond, Eric P. Chassignet, Sophie Cravatte, Fraser Davidson, Brad deYoung, Michelle Heupel, Emma Heslop, Cora Hoerstmann, Johannes Karstensen, Pierre Yves Le Traon, Miguel Marques, Craig McLean, Raul Medina, Theresa Paluszkiewicz, Ananda Pascual, Jay Pearlman, George Petihakis, Nadia Pinardi, Sylvie Pouliquen, Ralph Rayner, Iian Shepherd, Janet Sprintall, Toste Tanhua, Pierre Testor, Jukka Seppaelae, John Siddorn, Soeren Thomsen, Luis Valdes, Martin Visbeck, Anya M. Waite, Francisco Werner, John Wilkin, Ben Williams
Summary: Understanding and managing marine ecosystems requires an integrated approach that considers all relevant components and their interactions across different scales. Despite progress, the ocean observing system still faces barriers due to lack of coordination and competition. This article highlights the need for enhanced organizational integration and provides recommendations for breaking down barriers in order to foster a real transformational change in ocean observing.
FRONTIERS IN MARINE SCIENCE
(2022)
Article
Geosciences, Multidisciplinary
Kaitlin A. Naughten, Paul R. Holland, Pierre Dutrieux, Satoshi Kimura, David T. Bett, Adrian Jenkins
Summary: This study suggests that the Amundsen Sea experienced more sustained cool periods in the early twentieth century, but warming has caused an increase in ice shelf melting. The warming is likely driven by anthropogenic greenhouse gas emissions, and future changes in emissions are also likely to affect the region.
GEOPHYSICAL RESEARCH LETTERS
(2022)
Article
Multidisciplinary Sciences
H. W. Yang, T-W Kim, Pierre Dutrieux, A. K. Wahlin, Adrian Jenkins, H. K. Ha, C. S. Kim, K-H Cho, T. Park, S. H. Lee, Y-K Cho
Summary: This study investigates the seasonal variability and local forcing for the currents moving into and out of the Dotson ice shelf cavity using data from three bottom-mounted mooring arrays. It reveals that warm, salty water flows southward along the eastern channel slope, with maximum current velocities. On the other hand, freshened ice shelf meltwater flows northward at intermediate depth above the western slope. The inflow is correlated with local ocean surface stress curl, while the outflow follows the warm influx with a delay of about 2-3 months. Ocean circulation near Dotson Ice Shelf, affected by sea ice distribution and wind, significantly controls the inflow of warm water and subsequent ice shelf melting on seasonal time-scales.
NATURE COMMUNICATIONS
(2022)
Article
Oceanography
S. S. Jacobs, C. F. Giulivi, P. Dutrieux
Summary: A 63-year observational record in the southwest Ross Sea shows a continuous decrease in salinity and a slight warming. The freshening is mainly caused by a growing imbalance in meltwater from thinning ice shelves and increased iceberg calving, rather than sea ice production and stronger winds. The increase in meltwater is positively correlated with global atmospheric CO2 and temperature increases.
JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
(2022)
Article
Oceanography
A. T. Bradley, D. T. Bett, P. Dutrieux, J. De Rydt, P. R. Holland
Summary: The combination of the Pine Island Ice Shelf draft and a seabed ridge beneath it form a topographic barrier, which controls the access of warm water and plays a key role in the basal ablation of the ice shelf. The recent large calving events of the ice shelf could significantly change the cavity geometry and melt rates. Results from high-resolution ocean model simulations suggest that while the melt rates did not respond significantly to recent calving, further calving could increase the melt rates linearly by approximately 10%, providing evidence for the importance of calving in the ice-ocean sensitivity of the West Antarctic Ice Sheet.
JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
(2022)
Article
Oceanography
Peter E. D. Davis, Adrian Jenkins, Keith W. Nicholls, Pierre Dutrieux, Michael Schroder, Markus A. Janout, Hartmut H. Hellmer, Rob Templeton, Stephen McPhail
Summary: The Filchner-Ronne Ice Shelf is the largest ice shelf in the world, playing a crucial role in regulating Antarctica's contribution to global sea level rise. The study shows that the melting of the ice shelf is relatively low due to the presence of cold, high salinity water masses surrounding it. However, a warm water inflow was observed, contributing to the sub-ice cavity dynamics. This research provides valuable insights into the circulation of warm water inflow and its impact on the ice shelf.
JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
(2022)
Article
Geosciences, Multidisciplinary
Alessandro Silvano, Paul R. Holland, Kaitlin A. Naughten, Oana Dragomir, Pierre Dutrieux, Adrian Jenkins, Yidongfang Si, Andrew L. Stewart, Beatriz Pena Molino, Gregor W. Janzing, Tiago S. Dotto, Alberto C. Naveira Garabato
Summary: Warm ocean waters drive rapid ice-shelf melting in the Amundsen Sea. The variability of the undercurrent, which transports warm waters onto the continental shelf, is found to be depth-dependent on decadal time scales. Decadal ocean surface cooling in the tropical Pacific leads to wind anomalies that drive a perturbation of the surface flow and undercurrent, resulting in increased ice-shelf melting.
GEOPHYSICAL RESEARCH LETTERS
(2022)
Article
Geosciences, Multidisciplinary
Felipe Gomez-Valdivia, Paul R. Holland, Antony Siahaan, Pierre Dutrieux, Emma Young
Summary: Using simulations of the United Kingdom Earth System Model, this study analyzes the dynamics of the Ross Gyre (RG) during the historical period of 1850-2014 and under two future climate change scenarios. The results show a relatively stable RG in the model, consistent with observations, but project an expansion towards the Amundsen-Bellingshausen Seas in the 2040s. This expansion leads to enhanced onshore transport of warm Circumpolar Deep Water, increasing local shelf temperatures by up to 1.2 degrees C and independent of future climate change scenarios. The expansion is caused by regional ocean surface stress curl intensification due to anthropogenic sea ice loss. If realized, this warming would greatly impact the stability of the West Antarctic Ice Sheet.
GEOPHYSICAL RESEARCH LETTERS
(2023)
Article
Multidisciplinary Sciences
Benjamin J. Davison, Anna E. Hogg, Richard Rigby, Sanne Veldhuijsen, Jan Melchior van Wessem, Michiel R. van den Broeke, Paul R. Holland, Heather L. Selley, Pierre Dutrieux
Summary: Anomalous precipitation has a significant impact on mass loss from the West Antarctic Ice Sheet. Persistently low snowfall during 2009-2013 increased glacier melt, while extreme precipitation in 2019 and 2020 decreased mass loss. These findings highlight the importance of snowfall variability on short-term sea level contribution from West Antarctica.
NATURE COMMUNICATIONS
(2023)
Article
Geography, Physical
Alexander T. Bradley, Jan De Rydt, David T. Bett, Pierre Dutrieux, Paul R. Holland
Summary: Sea level rise from Pine Island Glacier is influenced by the backstress from its floating extension, the Pine Island Ice Shelf. The retreat of the ice shelf front and subsequent calving may lead to increased ocean melting and thinning of the ice shelf, with potentially detrimental consequences for stability.
ANNALS OF GLACIOLOGY
(2023)
Article
Geography, Physical
Paul R. Holland, Gemma K. O'Connor, Thomas J. Bracegirdle, Pierre Dutrieux, Kaitlin A. Naughten, Eric J. Steig, David P. Schneider, Adrian Jenkins, James A. Smith
Summary: Ocean-driven ice loss from the West Antarctic Ice Sheet is influenced by wind variability in the Amundsen Sea. Historical wind trends driven by greenhouse gases and ozone depletion have played a role in the recent ice loss, while internal climate variability has also had a significant influence. Future projections suggest that emissions mitigation is necessary to minimize ice loss in this region, but internal climate variability remains an unpredictable factor.
Article
Meteorology & Atmospheric Sciences
Sophie Cravatte, Guillaume Serazin, Thierry Penduff, Christophe Menkes
Summary: The study revealed that in the southwestern Pacific, the interannual variability of transports is mainly controlled by chaotic ocean variability, while in the tropical region, the interannual variability of transports and eddy kinetic energy modulation is largely deterministic and influenced by ENSO.