Unveiling pelagic-benthic coupling associated with the biological carbon pump in the Fram Strait (Arctic Ocean) by Simon Ramondenc, Damien Eveillard, Katja Metfies, Morten H. Iversen, Eva-Maria Nöthig, Dieter Piepenburg, Christiane Hasemann, Thomas Soltwedel

“…Chaetoceros socialis, sea-ice diatoms, Radiolaria, and Chaetognatha are critical components of vertical carbon flux to 200 m depth. …”
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Rapid and synchronous response of outlet glaciers to ocean warming on the Barents Sea coast, Novaya Zemlya by Rachel Carr, Zoe Murphy, Peter Nienow, Livia Jakob, Noel Gourmelen

“…We document a marked shift to warmer air and ocean temperatures, and reduced sea ice concentrations from 2005 onwards. Although we identify ocean warming as the primary trigger for glacier retreat, we suggest that multi-year thinning, driven by the shift towards warmer air temperatures since 2005, pre-conditioned Novaya Zemlya's glaciers to retreat. …”
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Stratigraphy and paleontology (plant and arthropod fossils) from the Late Neogene Niguanak site, Arctic Slope, Northern Alaska by L. David Carter, Donna Christensen, David M. Hopkins, John V. Matthews, Robert E. Nelson, Lynn E. Ovenden, Natalia Rybczynski, Tamara L. Fletcher

“…We describe the site stratigraphy and discuss the macrofossils and pollen recovered from the sediments, their paleoecological implications, and their significance for paleoclimate and sea ice. Mean annual temperatures were found to be 12.7°C warmer than current, with a pattern of much warmer winters, and less difference in summer warming as observed at other Pliocene Arctic sites. …”
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Dominant inflation of the Arctic Ocean’s Beaufort Gyre in a warming climate by Qiang Wang, Qi Shu, Shizhu Wang, Xinyue Li, Sergey Danilov, Fangli Qiao, Zhenya Song, Fan Wang, Thomas Jung

“…The inflation is driven by increased surface freshwater fluxes and intensified surface stress from wind strengthening and sea ice decline. Current climate models tend to underestimate this inflation, which could be alleviated by high-resolution ocean models and improved atmospheric circulation simulations. …”
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Lateral flexure of Erebus Ice Tongue due to ocean current forcing and fast ice coupling by Rodrigo Gomez-Fell, Wolfgang Rack, Oliver J. Marsh, Heather Purdie

“…An analytical model tuned to observations suggests that even without sea ice for stabilisation, the lateral bending stresses induced by the ocean are insufficient to cause calving without additional amplifying factors.…”
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Oriented ice eddy detection network based on the Sentinel-1 dual-polarization data by Jinqun Wu, Jinqun Wu, Yiqin Zheng, Tingting Wang, Chunyong Ma, Chunyong Ma, Ge Chen, Ge Chen

“…In the Marginal Ice Zones (MIZs), ice eddies contribute to the accelerated melting of surface sea ice by facilitating vertical heat transfer, which influences the evolution of the marginal ice zone and plays an indirect role in regulating global climate. …”
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Antarctic ice-shelf meltwater outflows in satellite radar imagery: ground-truthing and basal channel observations by Jakob Stanley Hamann, Thomas Arney, James David Kirkham, Paul Wachter, Karsten Gohl

“…The resulting smooth water surfaces were observed adjacent to the surface expression of deep basal channels, documented in a helicopter survey along part of the Bellingshausen Sea ice edge. We present high-temporal resolution satellite radar as a tool for identifying meltwater release from beneath ice shelves, capable of all-weather, day-and-night imaging.…”
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Rapid Emulation of Spatially Resolved Temperature Response to Effective Radiative Forcing by Christopher B. Womack, Paolo Giani, Sebastian D. Eastham, Noelle E. Selin

“…These errors are likely driven by state‐dependent climate feedbacks, such as the non‐linear effects of Arctic sea ice melt. We additionally show an illustrative example of our emulator for policy evaluation and impact analysis, emulating spatially resolved temperature change for a 1,000 member scenario ensemble in less than a second.…”
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Loss of pelagic fish and zooplankton density associated with subglacial upwelling in high Arctic estuaries may be mitigated by benthic habitat expansion following tidewater glacier... by Victor Gonzalez Triginer, Arunima Sen, Maxime Geoffroy, Børge Damsgård

“…In shallow fjords and areas with hard bottom substrate, it is expected that sea-ice and glacial retreat will promote macroalgal settlement, and we suggest that macroalgal expansion may compensate the loss of tidewater glacier-associated density of fish and zooplankton by the increase of benthic-driven density. …”
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Oceanic evasion fuels Arctic summertime rebound of atmospheric mercury and drives transport to Arctic terrestrial ecosystems by Shaojian Huang, Tengfei Yuan, Zhengcheng Song, Ruirong Chang, Dong Peng, Peng Zhang, Ling Li, Peipei Wu, Guiyao Zhou, Fange Yue, Zhouqing Xie, Feiyue Wang, Yanxu Zhang

“…Here, we use an integrated atmosphere–land–sea-ice–ocean model to simulate Hg cycling in the Arctic comprehensively. …”
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Long-term variability and trends in the Agulhas Leakage and its impacts on the global overturning by H. Großelindemann, H. Großelindemann, F. S. Castruccio, G. Danabasoglu, A. Biastoch, A. Biastoch

“…This study uses a set of high-resolution preindustrial control, historical and transient simulations with the Community Earth System Model (CESM) with a nominal horizontal resolution of 0.1° for the ocean and sea ice and 0.25° for the atmosphere and land. At these resolutions, the model represents the necessary scales to investigate Agulhas Leakage transport variability and its relation to the AMOC. …”
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Fingerprints of surface flows on solid substrates ablated by phase change: from laboratory experiments to planetary landscapes by Carpy, Sabrina, Berhanu, Michael, Chaigne, Martin, Courrech du Pont, Sylvain

“…In this case, the fluid mechanics associated with such phase changes play a key role in the evolution of terrestrial and planetary landscapes, observed by probes orbiting planets and moons. On Earth, sea ice, glaciers and karst plateaus extend over meters or kilometers. …”
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A numerical sensitivity study on the snow-darkening effect by black carbon deposition over the Arctic in spring by Z. Zhang, Z. Zhang, L. Zhou, L. Zhou, L. Zhou, M. Zhang, M. Zhang

“…<p>The rapid warming of the Arctic, driven by glacial and sea ice melt, poses significant challenges to Earth's climate, ecosystems, and economy. …”
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Metagenome-assembled-genomes recovered from the Arctic drift expedition MOSAiC by William Boulton, Asaf Salamov, Igor V. Grigoriev, Sara Calhoun, Kurt LaButti, Robert Riley, Kerrie Barry, Allison A. Fong, Clara J. M. Hoppe, Katja Metfies, Kersten Oetjen, Sarah Lena Eggers, Oliver Müller, Jessie Gardner, Mats A. Granskog, Anders Torstensson, Marc Oggier, Aud Larsen, Gunnar Bratbak, Andrew Toseland, Richard M. Leggett, Vincent Moulton, Thomas Mock

“…The metagenomic samples are from the surface ocean, chlorophyll maximum, mesopelagic and bathypelagic, within leads and under-ice ocean, as well as melt ponds, ice ridges, and first- and second-year sea ice. This set of MAGs can be used to benchmark microbial biodiversity in the Central Arctic Ocean, compare individual strains across space and time, and to study changes in Arctic microbial communities from the winter to summer, at a genomic level.…”
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The Modular and Integrated Data Assimilation System at Environment and Climate Change Canada (MIDAS v3.9.1) by M. Buehner, J.-F. Caron, E. Lapalme, A. Caya, P. Du, Y. Rochon, S. Skachko, M. Bani Shahabadi, S. Heilliette, M. Deshaies-Jacques, W. Chang, M. Sitwell

“…The software is designed to be sufficiently general to enable other DA applications, including atmospheric constituents (e.g. ozone), sea ice, and sea surface temperature. In addition to describing the current MIDAS applications, a sample of the results from these systems is presented to demonstrate their performance in comparison with either systems from before the switch to using MIDAS software or similar systems at other numerical weather prediction (NWP) centres. …”
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Precession modulates the poleward expansion of atmospheric circulation to the Arctic Ocean by Yi Zhong, Zhengyao Lu, Stefanie Kaboth-Bahr, Jimin Yu, Keiji Horikawa, Mark J. Dekkers, Juan C. Larrasoaña, Peter D. Clift, Michael E. Weber, Flor Vermassen, Sev Kender, Chijun Sun, Hu Yang, Xianfeng Wang, Camilla S. Andresen, Yanguang Liu, Haiwei Zhang, Zhengyang Dai, Lu Niu, Jingyu Zhang, Xuguang Feng, Debo Zhao, Wenyue Xia, Sheng Yang, Hai Li, Qingsong Liu

“…Our findings suggest that projections of a northward shift of the NPSG in response to future global warming will lead to wetter conditions in the Arctic Ocean and enhanced sea-ice loss.…”
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Rift propagation signals the last act of the Thwaites Eastern Ice Shelf despite low basal melt rates by Christian T. Wild, Samuel B. Kachuck, Adrian Luckman, Karen E. Alley, Meghan A. Sharp, Haylee Smith, Scott W. Tyler, Christopher Kratt, Tiago S. Dotto, Daniel Price, Keith W. Nicholls, Suzanne L. Bevan, Gabriela Collao-Barrios, Atsuhiro Muto, Martin Truffer, Ted A. Scambos, Karen J. Heywood, Erin C. Pettit, the TARSAN team

“…The increase in longitudinal strain rates near the grounding zone has led to full-thickness rifts and melange-filled gaps since 2020. A recent sea-ice break out has accelerated retreat at the western calving front, effectively separating the ice shelf from what remained of its northwestern pinning point. …”
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Overview: quasi-Lagrangian observations of Arctic air mass transformations – introduction and initial results of the HALO–(𝒜 𝒞)³ aircraft campaign by M. Wendisch, S. Crewell, A. Ehrlich, A. Herber, B. Kirbus, C. Lüpkes, M. Mech, S. J. Abel, E. F. Akansu, F. Ament, C. Aubry, C. Aubry, S. Becker, S. Borrmann, S. Borrmann, H. Bozem, M. Brückner, H.-C. Clemen, S. Dahlke, G. Dekoutsidis, J. Delanoë, E. De La Torre Castro, E. De La Torre Castro, E. De La Torre Castro, H. Dorff, R. Dupuy, O. Eppers, F. Ewald, G. George, G. George, I. V. Gorodetskaya, S. Grawe, S. Groß, J. Hartmann, S. Henning, L. Hirsch, E. Jäkel, P. Joppe, P. Joppe, O. Jourdan, Z. Jurányi, M. Karalis, M. Kellermann, M. Klingebiel, M. Lonardi, M. Lonardi, J. Lucke, J. Lucke, A. E. Luebke, M. Maahn, N. Maherndl, M. Maturilli, B. Mayer, J. Mayer, S. Mertes, J. Michaelis, J. Michaelis, M. Michalkov, G. Mioche, M. Moser, M. Moser, H. Müller, R. Neggers, D. Ori, D. Paul, F. M. Paulus, C. Pilz, F. Pithan, M. Pöhlker, M. Pöhlker, V. Pörtge, M. Ringel, N. Risse, G. C. Roberts, S. Rosenburg, J. Röttenbacher, J. Rückert, M. Schäfer, J. Schaefer, V. Schemann, I. Schirmacher, J. Schmidt, S. Schmidt, J. Schneider, S. Schnitt, A. Schwarz, H. Siebert, H. Sodemann, H. Sodemann, T. Sperzel, T. Sperzel, G. Spreen, B. Stevens, F. Stratmann, G. Svensson, C. Tatzelt, T. Tuch, T. Vihma, C. Voigt, C. Voigt, L. Volkmer, A. Walbröl, A. Weber, B. Wehner, B. Wetzel, M. Wirth, T. Zinner

“…Observations were made over areas of open ocean, the marginal sea ice zone, and the central Arctic sea ice. Two low-flying and one long-range, high-altitude research aircraft were flown in colocated formation whenever possible. …”
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Multiple eco-regions contribute to the seasonal cycle of Antarctic aerosol size distributions by J. Brean, D. C. S. Beddows, E. Asmi, A. Virkkula, A. Virkkula, L. L. J. Quéléver, M. Sipilä, F. Van Den Heuvel, T. Lachlan-Cope, A. Jones, M. Frey, A. Lupi, J. Park, Y. J. Yoon, R. Weller, G. L. Marincovich, G. L. Marincovich, G. C. Mulena, G. C. Mulena, R. M. Harrison, R. M. Harrison, M. Dall'Osto

“…“Nucleation” and “bursting” PNSDs occur 28 %–48 % of the time between sites, most commonly at the coastal sites of Marambio and King Sejong where air masses mostly come from the west and travel over extensive regions of sea ice, marginal ice and open ocean and likely arise from new particle formation. …”
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Chaotic oceanic excitation of low-frequency polar motion variability by L. Börger, M. Schindelegger, M. Zhao, R. M. Ponte, A. Löcher, B. Uebbing, J.-M. Molines, T. Penduff

“…To examine whether such random mass redistributions effectively excite polar motion, we compute monthly OAM anomalies from a 50-member ensemble of eddy-permitting global ocean/sea ice simulations that sample intrinsic variability through a perturbation approach on model initial conditions. …”
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