is to characterize the key processes that determine the observed sea ice, ocean, and ecosystem changes in the Central Arctic Ocean during meltseason. The process studies and continuous observations of CONTRASTS [...] (Graphic: Alfred-Wegener-Institut) Regime 1: Future Arctic (Photo: Marcel Nicolaus) Regime 2: Present Arctic (Photo: Marcel Nicolaus) Regime 3: Past Arctic (Photo: Marcel Nicolaus) Objectives The overall objective [...] is to characterize the key processes that determine the observed sea ice, ocean, and ecosystem changes in the Central Arctic Ocean during melt season. We will investigate the causes and consequences of

the Arctic lost its white landscape and had a blue, ice-free ocean. Alexander Haumann , ERC Starting Grant VERTEXSO , January 2023 - Dcember 2027. VERTEXSO (VERTical EXchange in the Southern Ocean) studies [...] Artemics (Arctic internal wave energetics and mixing and their interdependence with sea ice in changing climate conditions) aims to elucidate the role of internal gravity waves in the warming Arctic Ocean. We [...] the North Atlantic Ocean but also in remote areas such as the Pacific Ocean and the Antarctic. Heinrich, H.: Origin and consequences of cyclic ice rafting in the northeast Atlantic Ocean during the past 130

result of accelerated climate change, whole sections of coastline rapidly thaw, and erode into the Arctic Ocean. A new study published in the journal Geophysical Research Letters now shows that large amounts [...] of carbon dioxide are potentially being produced along these eroding permafrost coastlines in the Arctic.

of light penetrating into the Arctic Ocean, enhancing sea-ice melt and affecting sea-ice and upper-ocean ecosystems. Radiation fluxes through summer sea ice in the Arctic [...] energy fluxes through Arctic sea ice Arndt and Nicolaus ( 2014, TC; doi:10.5194/tc-8-2219-2014 ) In this study, we quantify solar shortwave fluxes through sea ice for the entire Arctic during all seasons [...] of melt onset and the correct classification of ice types. Radiation fluxes through Arctic sea ice Changes in Arctic sea ice result in increasing light transmittance and absorption Nicolaus et al. ( 2012

key Arctic atmospheric and sea ice variables based on satellite and in-situ data sets (WP1) • Regional feedback mechanisms responsible for Arctic climate change (WP2) • Interaction between Arctic climate [...] routes (WP4) • Impact of Arctic sea ice and cyclones on biodiversity and productivity of the Arctic marine biota (WP5) WP1 will quantify the strength of climatic changes in the Arctic based on unique Russian [...] in-situ and satellite data for sea ice and ocean variables and atmospheric key parameters. WP2 will improve the regional feedbacks between the Arctic atmosphere, ocean, sea ice, and snow in a regional coupled

under the snow and ice cover of the Arctic Ocean. The results of the study now published in the journal Nature Communications show that photosynthesis in the ocean is possible under much lower light conditions [...] low light levels. This is the result of an international study that investigated the development of Arctic microalgae at the end of the polar night. The measurements were carried out as part of the MOSAiC

the establishment of the FRAM (Frontiers in Arctic marine Monitoring) Ocean Observing System improves our monitoring capacities. LTER Observatory HAUSGARTEN Ocean Observing System FRAM [...] Understanding the ocean, and the complex physical, biological, and biogeochemical systems operating within it, is a challenge for the opening decades of the 21st century. The establishment of multidisciplinary [...] multidisciplinary ocean observatories by the Alfred Wegener Institute will help to provide the means to accomplish this goal. Ecological time-series work at the LTER (Long-Term Ecological Research) site HAUSGARTEN

deep Arctic Ocean. Deep-Sea Research I 73(3): 31-45. Freese, D., Schewe, I., Kanzog, C., Soltwedel, T., Klages, M. (2012): Recolonisation of new habitats by meiobenthic organisms in the deep Arctic Ocean: [...] small benthic biota to decreasing food availability, which is a common scenario for the changing Arctic Ocean, we installed cages (2 x 2 m in dimension, 50 cm in height) at the deep seafloor (2500 m water [...] (2009): Response of benthic microbial communities to chitin enrichment: an in-situ study in the deep Arctic Ocean. Polar Biology 32(1): 105-112. Gallucci, F., Fonseca, G., Soltwedel, T. (2008): Effects of megafauna

project is to build an efficient integrated Arctic Observation System (iAOS) by extending, improving and unifying existing systems in the different regions of the Arctic. Contact: T. Soltwedel, C. Hasemann, I [...] European open ocean fixed point observatories and to improve access to these key installations for the broader community. These will provide multidisciplinary observations in all parts of the oceans from the [...] Purser SenseOcean (Marine sensors for the 21st Century) EU funded FP7 project Duration: 01.10.2013 - 30.09.2017 Coordinator: Denise Martin, Natural Environment Research Council, UK SenseOCEAN brings together

increased to 1 km in the whole Arctic Ocean and further refined to subkilometer scales at the MOSAiC sites. The decades-long eddy-resolving model results for the Arctic Ocean and the well-evaluated and documented [...] variability of the Arctic Ocean and the cryosphere on time scales of decades to millennia and to use these results to robustly assess the impact of projected future climate changes on the Arctic. Deniz Aydin [...] Changing Arctic" (EPICA) is a BMBF funded project that will use high-resolution modeling and observations to understand the properties and impacts of (sub)mesoscale eddies in the Arctic Ocean, especially