ArcticOcean Tiny gypsum crystals can make phytoplankton so heavy that they rapidly sink, hereby transporting large quantities of carbon to the ocean’s depths. Experts from the Alfred Wegener Institute [...] Institute recently observed this phenomenon for the first time in the Arctic. As a result of this massive algal transport, in the future large amounts of nutrients could be lost from the surface waters.
were included that take a special look at the oceans and oceanic regions. Carbon dioxide is one of the main driving forces of climate change, also in the oceans. About Hans-Otto Pörtner Marine biologist Prof [...] which was released in March 2014. For the chapter six “Ocean systems” he summarized the effects climate change has on life in the oceans. The ocean - A changing ecosystem Warming, acidification, lack of [...] marine dwellers is ocean acidification. What effect does this have on organisms? In the process of ocean acidification carbon dioxide accumulates in seawater and enters the bodies of ocean dwellers. There
moderately rough arctic sea ice and take ridge height and distribution into account. They are well proven for applications in simulations of flow situations in the northern polar ocean. To prove if they [...] leads and polynias For the energy and moisture exchange between the atmosphere and the ice covered ocean, leads and polynias play an important role. This is documented by many modelling studies, but only [...] sea ice have a significant effect on the energy exchange between the atmosphere and the ice covered ocean. Uncertainties in the representation of sea ice albedo contribute considerably to the differences
at the ArcticOcean A lead in the sea ice of Amundsen Gulf Arctic marshlands In the Arctic Refuelling Team of NETCARE 2015 Flying halfway around the globe: measuring sea-ice thickness in the Arctic Anyone [...] strait from the ArcticOcean to the northern Atlantic. The motor of this ice transport is the transpolar drift, a major current that pushes ice from the Russian marginal seas of the ArcticOcean over the North [...] process constantly produces new sea ice in the Laptev Sea, which then finds its way to the ArcticOcean. The Arctic ice machine only shuts down in May, when even northeast Siberia grows warmer - and starts
at the ArcticOcean A lead in the sea ice of Amundsen Gulf Arctic marshlands In the Arctic Refuelling Team of NETCARE 2015 Flying halfway around the globe: measuring sea-ice thickness in the Arctic Anyone [...] Meereis Melt ponds on arctic sea ice Arctic: Ice or water? Aerial photo of Arctic sea ice in the record year 2012 Research vessel Polarstern during an ice station in the Arctic Ozean An iceberg drifts [...] Snow-covered Arctic sea ice New ice is forming Watch out for crevasses! Arctic sea ice First stage of arctic sea ice View onto a glacier’s calving front on the Norwegian island of Spitsbergen Arctic sea ice
Report on Ocean Acidification Summary of the current knowledge on ocean acidification Changes of the sea water chemistry This dataset has both historic and forecasted model-based changes in the ocean's carbonate [...] increase, the amount of CO2 that is absorbed by the ocean increases as well. This increase of CO2 in the ocean upsets the carbonate chemistry of the ocean and causes the waters to become more corrosive. The [...] (SOS)® The question of how the ocean ecosystem as a whole will react to ocean acidification can therefore not be answered conclusively. Does the current CBD report on ocean acidification reveal further gaps
Interview: Ocean Acidification and Fish Swimming in acidifying waters Scientists suspect that the ocean acidification is primarily endangering calcareous organisms such as corals and mussels. But what [...] about the fish having to swim in an ocean which is becoming increasingly acidic? Researchers are currently addressing this question in the national research program on ocean acidification, BIOACID II. Dr Felix [...] small extent by the current ocean acidification. In the interview, the physiologist explains why fish are also reacting sensitively to the reduction of the pH value of the oceans and how he is examining this
objects are fish. For his doctorate, he is researching into how warming and acidification of the oceans impact Arctic and Antarctic fish species. His special interest is focused on the fish brain. Australian [...] Schmidt now wishes to investigate whether fish in the polar regions react in a similar manner to ocean acidification with the assistance of NMR which is known as an MRT in hospitals. The NMR system in [...] where the next test subject is already waiting for Matthias Schmidt. (Kristina Bär) Links to AWI ocean acidification research Integrative Ecophysiology NMR Scientific Project BIOACID Marine Biogeosciences
lives in the temperate zones, but is transported to the Arctic with the North Atlantic Current. Calanus glacialis A species that lives primarily in Arctic shelf areas. Calanus hyperboreus A giant among copepods [...] snack – they are an important element of the food webs of the Arctic. Indirect consequences According to the experiments, therefore, ocean acidification alone presumably cannot have much impact on copepods [...] earlier in spring – that means at a time when the copepods are still dormant in the depths of the ArcticOcean. Barbara Niehoff’s next research questions are, therefore: What do copepods eat if their favourite