... proposed a decade ago. Here, we report in situ observations of coarse aerosol production (particle diameter 0.5–20.0 µm) dominated by sea salt from blowing snow above sea ice during winter/spring in the Central Arctic during the MOSAiC (Multidisciplinary drifting Observatory for the Study of Arctic Climate...

...Jessica A. Mirrielees; Rachel M. Kirpes; Emily J. Costa; Grace C. E. Porter; Benjamin J. Murray; Nurun N. Lata; Vanessa Boschi; Swarup China; Amanda M. Grannas; Andrew P. Ault; Patricia A. Matrai; Kerri A. Pratt The rapidly warming Arctic has transitioned to thinner sea ice which fractures...

.... Waller; Joana R. Xavier; Irina Zhulay; Hanieh Saaedi Interest in the deep Arctic Ocean is rapidly increasing from governments, policy makers, industry, researchers, and conservation groups, accentuated by the growing accessibility of this remote region by surface vessel traffic. In this review, our goal...

...Gina Jozef; John J. Cassano; Amy Solomon; Janet Intrieri; Gijs de Boer Observations from the Multidisciplinary drifting Observatory for the Study of Arctic Climate (MOSAiC) were used to evaluate the Coupled Arctic Forecast System (CAFS) model’s ability to simulate the atmospheric boundary layer...

...; Jessica A. Mirrielees; Hailey E. Kempf; Andrew P. Ault; Kerri A. Pratt; Martin Gysel-Beer; Silvia Henning; Christian Tatzelt; Julia Schmale The Arctic is sensitive to cloud radiative forcing. Due to the limited number of aerosols present throughout much of the year, cloud formation is susceptible...

...Günther Heinemann; Lukas Schefczyk; Rolf Zentek Low-level jets (LLJs) are studied for the period of the ship-based experiment MOSAiC 2019/2020 using the regional climate model Consortium for Small-scale Model—Climate Limited area Mode (CCLM). The model domain covers the whole Arctic with 14 km...

...Antoine Haddon; Patrick Farnole; Adam H. Monahan; Tessa Sou; Nadja Steiner The future of Arctic sea ice algae is examined using a regional ocean and sea ice biogeochemical model, with a simulation from 1980 to 2085, considering a future scenario with strong warming. To analyze the impacts...

...Christian Pilz; John J. Cassano; Gijs de Boer; Benjamin Kirbus; Michael Lonardi; Mira Pöhlker; Matthew D. Shupe; Holger Siebert; Manfred Wendisch; Birgit Wehner Low-level clouds in the Arctic affect the surface energy budget and vertical transport of heat and moisture. The limited availability...

... of phytoplankton and copepods across a large portion of the western Arctic. The bulk lipid profiles of copepod assemblages were determined largely by their taxonomic composition, but specific fatty acid groups (e.g., omega-6 and saturated fatty acids) exhibited strong correlations with water properties (e.g., pH...

...Linda Thielke; Gunnar Spreen; Marcus Huntemann; Dmitrii Murashkin Observations of sea ice surface temperature provide crucial information for studying Arctic climate, particularly during winter. We examined 1 m resolution surface temperature maps from 35 helicopter flights between October 2, 2019...

.../ . Sea ice Arctic Melt ponds Snow In the published article, we detected a unit error in the reported pond volume estimates in the text and in Figure 9b. Errors: The amount of pond water drained from one of these large ponds was approximately 14,200 m 3 ; its area decreased from...

...Anne Sledd; Matthew D. Shupe; Amy Solomon; Christopher J. Cox; Donald Perovich; Ruibo Lei During the Arctic winter, the conductive heat flux through the sea ice and snow balances the radiative and turbulent heat fluxes at the surface. Snow on sea ice is a thermal insulator that reduces...

...Moein Mellat; Camilla F. Brunello; Martin Werner; Dorothea Bauch; Ellen Damm; Michael Angelopoulos; Daiki Nomura; Jeffrey M. Welker; Martin Schneebeli; Mats A. Granskog; Maria Hoerhold; Amy R. Macfarlane; Stefanie Arndt; Hanno Meyer The Arctic Ocean is an exceptional environment where hydrosphere...

...Kyle Dilliplaine; Gwenn Hennon Anthropogenic climate change is reducing ice and snow thickness in the Arctic. The loss of summer sea ice has led to increased access to Arctic waters and the development of marine resources, which raises the risk of oil spills. Thinning ice and snow also increases...

...Janna E. Rückert; Philip Rostosky; Marcus Huntemann; David Clemens-Sewall; Kerstin Ebell; Lars Kaleschke; Juha Lemmetyinen; Amy R. Macfarlane; Reza Naderpour; Julienne Stroeve; Andreas Walbröl; Gunnar Spreen Warm air intrusions over Arctic sea ice can change the snow and ice surface conditions...

... has weakened, and water chemistry and ecosystem components have changed, the latter in a direction often described as “Atlantification” or “borealisation,” with a less “Arctic” appearance. Temporal and spatial changes in the Barents Sea have a wider relevance, both in the context of large-scale...

... the composition of marine snow (particles and aggregates >500 µm) and its coexistence with zooplankton change with depth layer, level of zooplankton dominance, chlorophyll fluorescence, and turbidity across the coastal–offshore gradients of hydrographically different Arctic fjords. The distribution...

... Near-surface mercury and ozone depletion events occur in the lowest part of the atmosphere during Arctic spring. Mercury depletion is the first step in a process that transforms long-lived elemental mercury to more reactive forms within the Arctic that are deposited to the cryosphere, ocean, and other...

... measurements crucial for understanding of ice mass balance. Here we detail the transects at the Multidisciplinary drifting Observatory for the Study of Arctic Climate (MOSAiC) 2019–2020, which represent the first such measurements collected across an entire season. Compared with similar historical transects...

...Lia Herrmannsdörfer; Malte Müller; Matthew D. Shupe; Philip Rostosky Atmospheric model systems, such as those used for weather forecast and reanalysis production, often have significant and systematic errors in their representation of the Arctic surface energy budget and its components. The newly...