Cruise report
Microbes in Arctic sea ice: who are they and what are they doing?
The Arctic sea ice with melt ponds. Photo: Pauline Snoeijs Leijonmalm Sampling large amounts of water in and beneath the sea ice. Photo: Pauline Snoeijs Leijonmalm Very little is known about the microbial communities ...
Cruise report
Piston coring in the central Arctic with icebreaker Oden
... and why has Arctic sea ice cover varied in the recent geologic past? In the project Palaeoceanography of the Arctic – Water Masses, Sea Ice, and Sediments (PAWS), we utilise the new sea ice proxy IP25, a biomarker from ice algae, together ...
Cruise report
Population dynamics of Arctic foxes at Karrak Lake
Ear-tagged Arctic fox on a windy day in June 2011. Photo: Gustaf Samelius This study examines various aspects of the population dynamics of arctic foxes and how they vary with fluctuations in lemming abundance – the main food of arctic foxes in ...
Cruise report
Mapping of permafrost in northern Lapland using ground penetrating radar
... taking notes near the radar equipment. Photo: Kilian Krüger How does the extent of the permafrost affect groundwater flow paths at different times of the year? The ground in the Arctic is largely frozen year round, so the groundwater ...
Cruise report
Antarctic stations: between whaling, science, and geopolitics – the LASHIPA 8 expedition
Abandoned research station, Deception Island – a source of historical knowledge about the conditions of Antarctic research. Photo: Dag Avango ...
Cruise report
MARA: moveable atmospheric radar for Antarctica
Satheesan Karathazhiyath prepares a payload for a balloon flight for studies of atmospheric parameters in the troposphere ...
Cruise report
Prospecting camps for mineral resources and Arctic politics: the LASHIPA 9 expedition
Mining pick at the former entrance of an asbestos mine, Recherchefjorden. Photo: Pia Leminen The objective of the expedition was to ...
Cruise report
The retreat of the West Antarctic Ice Sheet since the Last Glacial Maximum
... Ross Sea on the way towards Pine Island Bay. Photo: Martin Jakobsson This project addresses the following questions: What was the timing of the West Antarctic ice sheet’s (WAIS) retreat since the Last Glacial Maximum (LGM), 20,000 years ago, ...
Cruise report
Why measure cosmic radiation with a three-tonne block of ice on an icebreaker?
... installed on Oden. Inside is thethree tonne ice block and neutrino detectors. Photo: Allan Hallgren Researchers at the geographic South Pole have built IceCube, the world’s largest neutrino observatory. One reason to search for ...
Cruise report
Organism adaptations to extreme Antarctic waters
A copepod (about 1 mm long) with bright red photoprotective pigmentation (carotenoids). Photo: Hans Berggren The ozone hole above Antarctica has increased considerably during the last ...
Cruise report
Winter sea ice: The missing link in the biogeochemical cycle of organo-halogens in polar areas
Polarstern in Antarctic darkness. Photo: Stefan Hendricks This project aims to understand how changes in global climate will affect the processes determining halocarbon production and cycling in polar areas and interactions at the snow-sea ...
Cruise report
Interrelated biogeochemical cycles of halocarbons and mercury
Katarina Abrahamsson sampling for halocarbons at an ice station. Anna Wåhlin This project aims to determine the importance ...
Cruise report
Physical oceanography
... measurements. Photo: Anna Wåhlin The glaciers emptying into the Amundsen Sea in West Antarctica have displayed accelerated thinning in recent decades. There are clear signs that this is caused by increased ocean-induced melting, related to ...
Cruise report
Implications of increasing CO2
Sea-ice and snow sampling. Photo: Agneta Fransson What is the effect of sea ice and glacial meltwater on the CO2 exchange and calcium carbonate saturation state (i.e., Ω)? We ...
Cruise report
Health assessment of Antarctic seals
Weddell seal basking in the sun. Photo: Karin Hårding We have investigated the health status of three endemic seal species, i.e., the Ross, Weddell, and crabeater seals. Our main interest was ...
Cruise report
Mapping the Amundsen Sea polynya microbiome: patchiness and role in carbon processing
Peng Yi and Keliang Shi were landed on the sea ice for collection of snow samples. Photo: Patricia L. Yager Our aim on this expedition was to use iodine isotopes (129I and 127I) and species in the water and air of ...
Cruise report
Mapping the Amundsen Sea polynya microbiome: patchiness and role in carbon processing
... image of DNA-stained Southern Ocean bacteria. Photo: Inga Richert We are part of the Amundsen Sea Polynya International Research Expedition (ASPIRE) project, which aims to investigate climate controls of carbon fluxes in one of the ...
Cruise report
Climate change and predatory invasion of the Antarctic marine environment
The invasive predatory King Crab (Lithodidae) on the slope near the Antarctic Peninsula, captured by the SeaBed camera. Global climate ...
Cruise report
Investigating the source of iron and other trace nutrients in the Amundsen Sea Polynya
Nathaniel B. Palmer docked on ice during a short break from sampling in the Amundsen Sea. Photo: Julie Dinasquet The ...
Cruise report
The frozen Garden of Eden: on the hunt for Eocene mammals
... mammals of the southern hemisphere evolve and spread? The record of Antarctic mammals and other terrestrial vertebrates is still very poor. New specimens of mammals, other vertebrates, and fossil plants would give a more precise picture ...