causes and consequences of sea ice melt in three contrasting sea-ice regimes as functions of atmospheric and oceanographic conditions: 1) seasonal sea ice, mostly originating from Russian shelf regions and [...] observed sea ice, ocean, and ecosystem changes in the Central Arctic Ocean during melt season. We will investigate the causes and consequences of differences in sea ice melt in three contrasting sea-ice e [...] ice zone 2) first- and second year sea ice from the central Arctic Ocean, drifting along the transpolar drift system, and 3) multi-year ice in the “last ice area” north of Greenland. The overall objective

the AWI’s Data Assimilation group. I’m interested in using data assimilation to study the global air-sea flux of CO 2 . Maya Dalby (Postdoc) I studied biology and marine biology and have become a zooplanktologist [...] interactions affect the efficiency of the biological carbon pump and lastly carbon export to the deep sea and sediments. Currently, I investigate how to implement new iron sources and new phytoplankton functional [...] projects. I completed a master's thesis on the effects of eddies on the phytoplankton bloom in the North Atlantic using a simple NPZD (Nutrient-Phytoplankton-Zooplankton-Detritus) model (biogeochemical model)

on particulate organic carbon cycling in the North Sea The collaborative project "Anthropogenic impacts on particulate organic carbon cycling in the North Sea" ( APOC ) is funded by the German Federal Ministry [...] carbon sequestration in the North Sea and how this ecosystem service is affected by global climate change and anthropogenic pressures. The sediment budget of the North Sea is strongly influenced by bo [...] sediments of the Baltic Sea, assess their OC accumulation rate and OC storage capacity, parameterise OC sedimentation and remineralisation and extrapolate the rates in the Baltic Sea. Funding Bundesamt für

national project Mak-Pak, where macroalgae suitable for processing and native to the North Atlantic and the North Sea were screened, and the growth and ingredients yield optimised. The Mak-Pak2 project

the focus of the section lies in the pelagic and benthic communities of the North Sea, with comparisons to other shelf sea systems. Given the large temporal and spatial spectra we work on a range of [...] Short Profile Coastal seas are highly variable environments, with variation on all time scales from seconds to decades, and spatial scales from mm to km. Organisms living in such zones should be adapted [...] large variation, but potentially not to the changes that are currently taking place in our coastal seas. Thus, coastal organisms represent the ideal case to contrast the effects of natural and non-natural

mesocosm experiments with North Sea plankton to understand how global change impacts planktonic food webs on different organisational levels (individual, population, and community) North Sea plankton Asterionellopsis [...] interactions, and are characterized by strong spatio-temporal dynamics. The characterization of Shelf Sea food webs is our central aim. By using field and experimental approaches, we address the effects of

MAT252 Sercon-2020 δ 30 Si δ 18 O (diatoms, radiolarians, sponge ferrules) Reconstruction of polar sea surface salinity changes and meltwater events (δ 18 O) Efficiency of the biological pump (δ 30 Si) [...] measurement of stable carbon isotopes of dissolved inorganic carbon (DIC) in waters from the polar seas is routinely carried out in our laboratories. This parameter is being determined via a GasBench Plus [...] supply of nutrient silicon and its use in polar and subpolar ocean regions (e.g. Southern Ocean, North Pacific) can be reconstructed on geological time scales. For the measurements, pure diatom-, radiolarian-

students (Master Studenten) Marie-Luise Schneider (active), University Oldenburg Soundscapes of the North Sea: Acoustic fauna identification using Hydrophones and Baited Remote Underwater Videos Ricarda Wesener [...] humpback whale populations in the eastern Weddell Sea in 2011 and 2012 Ramona Mattmüller (2019), Master Uni Bremen Marine mammal acoustic presence in relation to sea ice concentrations off Tasiilaq, East Greenland [...] monitoring for marine mammal research and mitigation. I supervise the maintenance of the Weddell Sea’s HAFOS (Hybrid Antarctic Float Observing System) long-term marine observatory including the PALAOA

Debusschere, E. (2024): Revised clusters of annotated unknown sounds in the Belgian part of the North sea. Frontiers in Remote Sensing, 5, 1384562. DOI: doi.org/10.3389/frsen.2024.1384562 Parcerisas [...] in the Weddell Sea. Endangered Species Research, 30:239-253. DOI: doi.org/10.3354/esr00739 . 2015 Menze S, Zitterbart D , Van Opzeeland IC, Boebel O (2016). The influence of sea ice, wind speed [...] Van Opzeeland, I., Eriksson B.K. (2025): The biological soundscape of temperate reefs in the Wadden sea. Sci Rep 15, 9216. DOI: doi.org/10.1038/s41598-025-92955-0 Wöhle, S., Thomisch, K., Burkhardt

completing survival training—including a night on the sea ice—we embarked on our mission at Arrival Heights near McMurdo Station. Cutting through 1.7 meters of sea ice revealed a fascinating underwater ecosystem [...] carbon and Silicate cycle of a Changing Antarctic (SPONGESCAN) Cutting entrance and safety holes in the sea ice. (Photo: Erik Wurtz) Heated tent over the dive hole. (Photo: Erik Wurtz) Lander system above the [...] prevent the system from the destructive long-term impact of saltwater, cold temperatures, storms, sea-ice and icebergs for almost 6 years. Meanwhile some steel components were more or less gone due to