Article
Oceanography
A. Klocker, A. C. Naveira Garabato, F. Roquet, C. de Lavergne, S. R. Rintoul
Summary: The formation of the Southern Ocean's internal pycnocline is closely related to sea ice-ocean interactions, with strong salinity-based stratification created at the base of the winter mixed layer due to persistent sea-ice melt. These highly stratified sheets then descend into the ocean interior at fronts of the Antarctic Circumpolar Current and connect seamlessly to the internal pycnocline in areas further north. These findings highlight the important role of localized sea ice-ocean interactions in shaping the vertical structure of the Southern Ocean.
JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
(2023)
Article
Geosciences, Multidisciplinary
Wenli Zhong, Sylvia T. Cole, Jinlun Zhang, Ruibo Lei, Michael Steele
Summary: The ocean-to-ice heat flux in the Beaufort Gyre region of the Arctic Ocean has increased during winter due to thinner and less compact sea ice, leading to enhanced ice growth and stronger vertical convection and subsurface heat entrainment. The contribution of Ekman upwelling to the heat flux changes was found to be secondary.
GEOPHYSICAL RESEARCH LETTERS
(2022)
Article
Oceanography
Samuel Brenner, Luc Rainville, Jim Thomson, Sylvia Cole, Craig Lee
Summary: Understanding and predicting sea ice dynamics and ice-ocean feedback processes require accurate descriptions of momentum fluxes across the ice-ocean interface. By using observations from moorings in the Beaufort Sea and a force-balance approach, drag coefficient values over an annual cycle and a range of ice conditions were determined, with reasonable prediction capabilities when ice geometry is known.
JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
(2021)
Article
Environmental Sciences
Zhang Yi-Ming, Song Mi-Rong, Dong Chang-Ming, Liu Ji-Ping
Summary: The study compares the performance of Maximum Entropy Production (MEP) algorithm with Bulk Flux (BF) algorithm in simulating seasonal variations of heat fluxes over Arctic sea ice, showing significant differences, especially in summer sensible heat flux. The MEP produces weak cooling effect on the ice surface in summer, while the BF generates a warming effect, leading to reduced seasonal cycle of Arctic sea ice mass flux.
ADVANCES IN CLIMATE CHANGE RESEARCH
(2021)
Article
Oceanography
Laura Crews, Craig M. Lee, Luc Rainville, Jim Thomson
Summary: In seasonally ice-free parts of the Arctic Ocean, the onset of freeze up is characterized by heat loss from the upper ocean to the atmosphere. This study shows that horizontal advection of sea ice meltwater accelerates freeze up in areas distant from the ice edge, promoting earlier ice formation.
JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
(2022)
Article
Oceanography
Lu Zhou, Celine Heuze, Martin Mohrmann
Summary: Sea ice production within open-ocean polynyas is a major source of dense water and plays a key role in the global overturning circulation. This study explores the sea ice energy budget and estimates the sea ice production in two open-ocean polynyas in the Weddell Sea. It finds a strong correlation between ice production and skin temperature and wind speed, highlighting the need for better monitoring of these factors at high latitudes.
JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
(2023)
Article
Geography, Physical
Na Li, Ruibo Lei, Petra Heil, Bin Cheng, Minghu Ding, Zhongxiang Tian, Bingrui Li
Summary: This study investigates the mass balance of snow and landfast ice (LFI) in Prydz Bay using observations from sea ice mass balance buoys. The results show that the annual maximum ice thickness and snow depth were 1.59+/-0.17 m and 0.11-0.76 m, respectively. It is argued that an increased understanding of snow processes, local atmospheric and oceanic conditions, as well as coastal morphology and bathymetry, is required to improve the Antarctic LFI modeling.
Article
Geosciences, Multidisciplinary
Elena Savidge, Tasha Snow, Matthew R. Siegfried
Summary: In this study, a multi-decadal record of polynya area at Pine Island Glacier (PIG) was generated using satellite imagery. The results showed significant interannual variability in polynya area, with the largest polynya occurring at the western edge of PIG just before a large iceberg calved. This suggests that polynya size and position may influence iceberg calving.
GEOPHYSICAL RESEARCH LETTERS
(2023)
Article
Meteorology & Atmospheric Sciences
M. Gryschka, V. M. Gryanik, C. Luepkes, Z. Mostafa, M. Suehring, B. Witha, S. Raasch
Summary: Sea ice leads are important in energy exchange between the ocean and atmosphere in polar regions and need to be considered in weather and climate models. The lead-averaged surface heat flux depends not only on meteorological parameters but also on lead width. However, there have been limited studies on the dependency of surface heat flux on lead width.
JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
(2023)
Article
Environmental Sciences
Jinsong Lin, Yanfeng Wang, Haidong Pan, Zexun Wei, Tengfei Xu
Summary: Air-sea heat flux is crucial for ocean circulation, weather, and climate. Satellite remote sensing, particularly the Cyclone Global Navigation Satellite System (CYGNSS), is used to estimate turbulent heat fluxes. High uncertainty is found near the equator in the western Pacific Ocean, Arabian Sea, Bay of Bengal, and Gulf of Guinea.
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
Multidisciplinary Sciences
M. Mar Flexas, Andrew F. Thompson, Michael P. Schodlok, Hong Zhang, Kevin Speer
Summary: The observed acceleration of ice shelf basal melt rates throughout West Antarctica could destabilize continental ice sheets and markedly increase global sea level. Explanations for decadal-scale melt intensification have focused on processes local to shelf seas surrounding the ice shelves. A suite of process-based model experiments, guided by CMIP6 forcing scenarios, show that freshwater forcing from the Antarctic Peninsula, propagated between marginal seas by a coastal boundary current, causes enhanced melting throughout West Antarctica.
Article
Environmental Sciences
Zhangxian Ouyang, Yun Li, Di Qi, Wenli Zhong, Akihiko Murata, Shigeto Nishino, Yingxu Wu, Meibing Jin, David Kirchman, Liqi Chen, Wei-Jun Cai
Summary: The Arctic Ocean has undergone a transition from perennial ice coverage to seasonal ice-free conditions in recent decades. This change has led to significant alterations in the carbon cycle and biogeochemical processes in the region. The study found that summer CO2 uptake increased in the Chukchi Sea due to a longer ice-free period, larger open areas, and increased primary production. However, no significant increase in CO2 uptake was observed in the Canada Basin and the Beaufort Sea. This discrepancy can be attributed to sea ice variations and other environmental factors that influence the air-sea pCO(2) gradient.
GLOBAL BIOGEOCHEMICAL CYCLES
(2022)
Article
Environmental Sciences
Christopher Barrell, Ian A. Renfrew, John C. King, Steven J. Abel, Andrew D. Elvidge
Summary: In winter over the subpolar North Atlantic Ocean, the strongest heat exchange between the ocean and the air occurs near the sea-ice edge. The retreat of Arctic sea ice is changing the distribution of heat exchange, affecting the formation of dense waters and the Atlantic Meridional Overturning Circulation. Climate model simulations show that future projections indicate a reduction in winter sea ice and air-sea heat fluxes, particularly in certain regions of the North Atlantic, with more severe impacts under high emissions scenarios.
Article
Environmental Sciences
Simon Pendleton, Alan Condron, Jeffrey Donnelly
Summary: In this study, a numerical model was used to investigate if the Intra-Allerod Cold Period was triggered by the drainage of Glacial Lake Iroquois, and it was found that although Hudson Valley floods occurred close to the beginning of the cold period, they were unlikely the sole cause. This result has implications for re-evaluating the relationship between meltwater flood events and periods of climatic cooling, particularly in terms of flood input location, volume, frequency, and duration.
COMMUNICATIONS EARTH & ENVIRONMENT
(2021)
Article
Oceanography
M. Dolores Perez-Hernandez, Robert S. Pickart, Daniel J. Torres, Frank Bahr, Arild Sundfjord, Randi Ingvaldsen, Angelika H. H. Renner, Agnieska Beszczynska-Moller, Wilken-Jon von Appen, Vladimir Pavlov
JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
(2019)
Article
Oceanography
Sebastian Menze, Randi B. Ingvaldsen, Peter Haugan, Ilker Fer, Arild Sundfjord, Agnieszka Beszczynska-Moeller, Stig Falk-Petersen
JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
(2019)
Article
Oceanography
Martin Arntsen, Arild Sundfjord, Ragnheid Skogseth, Malgorzata Blaszczyk, Agnieszka Prominska
JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
(2019)
Article
Geosciences, Multidisciplinary
I Wiedmann, E. Ceballos-Romero, M. Villa-Alfageme, A. H. H. Renner, C. Dybwad, H. van der Jagt, C. Svensen, P. Assmy, J. M. Wiktor, A. Tatarek, M. Rozanska-Pluta, M. H. Iversen
GEOPHYSICAL RESEARCH LETTERS
(2020)
Article
Oceanography
Pedro Duarte, Arild Sundfjord, Amelie Meyer, Stephen R. Hudson, Gunnar Spreen, Lars H. Smedsrud
JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
(2020)
Article
Multidisciplinary Sciences
Alexandra N. Stocker, Angelika H. H. Renner, Maaike Knol-Kauffman
SCIENTIFIC REPORTS
(2020)
Article
Environmental Sciences
Elizabeth M. Jones, Angelika H. H. Renner, Melissa Chierici, Ingrid Wiedmann, Helene Hodal Lodemel, Martin Biuw
ELEMENTA-SCIENCE OF THE ANTHROPOCENE
(2020)
Article
Oceanography
Oyvind Lundesgaard, Arild Sundfjord, Angelika H. H. Renner
Summary: This study examines the evolution of sea ice concentration along the continental margin north of Svalbard between 2012 and 2019, finding that interannual variability in sea ice concentration is primarily driven by large-scale ice drift rather than abnormal upper ocean heat content. The research also suggests that the southern continental slope of the Eurasian Basin serves as an important melting area for sea ice advected from the north.
JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
(2021)
Article
Oceanography
Zoe Koenig, Amelie Meyer, Christine Provost, Nathalie Sennechael, Arild Sundfjord, Jean-Claude Gascard
Summary: This study investigates the circulation and properties of the Atlantic Water near the Yermak Plateau, revealing the impact of anomalous southerly winds on its temperature and salinity. A glider deployed in the region sampled different branches of the Atlantic Water and observed cooling and freshening effects caused by cold and fresh waters from the shelf.
JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
(2022)
Review
Ecology
Sturla F. Kvamsdal, Dorothy Dankel, Nils-Arne Ekerhovd, Alf Hakon Hoel, Angelika H. H. Renner, Anne Britt Sando, Stein Ivar Steinshamn
Summary: Many areas in the Arctic are vulnerable to the impacts of climate change, affecting physical, biological, economic, and social aspects. A multidisciplinary approach is needed to comprehensively understand these effects and explore new questions and issues related to climate change in the region.
Article
Meteorology & Atmospheric Sciences
Oyvind Lundesgaard, Arild Sundfjord, Sigrid Lind, Frank Nilsen, Angelika H. H. Renner
Summary: The northern Barents Sea is a cold Arctic shelf sea that has undergone significant warming and sea ice loss. Observational records show that warmer and saltier waters from the Atlantic play a major role in driving the ocean variability in the region. Seasonal cycles of ocean temperature are driven by southward inflow through cross-shelf troughs. Atmospheric pressure gradient influences subtidal current variability. Sea ice imports have a lasting impact on the upper ocean, affecting salinity and stratification.
Article
Geosciences, Multidisciplinary
Pedro Duarte, Philipp Assmy, Karley Campbell, Arild Sundfjord
Summary: Different sea ice models use unique approaches in computing nutrient diffusion between the ocean and the ice bottom, which is usually separate from the calculation of turbulent heat flux. This study argues that the transfer of nutrients from the ocean to sea ice should be as consistent as possible with heat transfer, as both fluxes respond to varying forcing in a similar manner. The simulation results support the hypothesis that considering turbulent nutrient exchanges between the ocean and sea ice can significantly enhance ice algal production and biomass, emphasizing the importance of properly representing these exchanges in biogeochemical models.
GEOSCIENTIFIC MODEL DEVELOPMENT
(2022)
Article
Environmental Sciences
Anne Britt Sando, Geir Odd Johansen, Asgeir Aglen, Jan Erik Stiansen, Angelika H. H. Renner
FRONTIERS IN MARINE SCIENCE
(2020)
Article
Environmental Sciences
Haakon Hop, Philipp Assmy, Anette Wold, Arild Sundfjord, Malin Daase, Pedro Duarte, Slawomir Kwasniewski, Marta Gluchowska, Jozef M. Wiktor, Agnieszka Tatarek, Jozef Wiktor, Svein Kristiansen, Agneta Fransson, Melissa Chierici, Mikko Vihtakari
FRONTIERS IN MARINE SCIENCE
(2019)