Polar cod fulfil a key role in the Arctic food web, as they are a major source of food for seals, whales and seabirds alike. But the polar cod themselves might soon be the hungry ones. Under the ice of the central Arctic, the juvenile fish are indirectly but heavily dependent on ice algae. As a result, retreating sea ice could have far-reaching impacts on the food web. Though researchers have long since suspected this relation existed, an international team of researchers led by the Alfred Wegener Institute (AWI), Helmholtz Centre for Polar and Marine Research, have now successfully confirmed it.
Stronger winds, increased warming, ocean acidification and declining sea ice have been identified as major threats to some of the keystone members of the Southern Ocean community – phytoplankton. A recent review, published in Frontiers in Marine Science, predicts the likely impact of climate change on phytoplankton across various regions in the Southern Ocean.
The Arctic Institute (TAI) is a renowned non-profit US organization that covers very complex and diverse Arctic policy and security. It also acts as an information platform on Arctic issues. To this end, it has set up a broad and large network of researchers and other experts on various Arctic topics. However, since the inauguration of the new US administration under President Trump, this network has experienced a surge of data disappearance on US Arctic policy and climate issues and it all points to the US administration as the culprit. Victoria Herrmann, president and managing director of the TAI, has now published an open letter in the British newspaper The Guardian.
As climate change continues to impact the Antarctic, glacier melt and permafrost thaw are likely to make more liquid water available to soil and aquatic ecosystems in the McMurdo Dry Valleys, potentially providing a more nutrient-rich environment for life, according to a Dartmouth study recently published in Antarctic Science.
The Arctic Council was established by Arctic nations as forum to discuss and decide Arctic issues which overlap national boundaries. The chairmanship rotates every two years and now, it is Finland’s turn to chair the council. At the next council meeting in Fairbanks, it will take over the Arctic council as well as the climate leadership from the currently presiding United States.
In 2012, news about the record low of Arctic sea ice minimum extent went around the world. Now, the Arctic sea ice maximum extent also has reached an all-time record low according to the data presented by the US National Snow and Ice Data Center in Boulder, Colorado. A mere 14.4 million square kilometers of the Arctic Ocean were covered by ice.
The continuous daylight conditions of summer in Antarctica are known to interfere with physiological functions such as sleep patterns and the release of melatonin, a hormone associated with circadian rhythms and sleep. Now, a study offers new information about why people in this region sleep poorly, and suggests that social behavior may also play a role. The study, published ahead of print in the Journal of Applied Physiology, was chosen as an APSselect article for March.
Being a young guillemot chick is quite hard. Growing up on a small ledge on high cliffs in the Arctic, surrounded by thousands of birds, being prey for gulls, foxes and even polar bears is quite stressful. But even worse, the little ones have to jump down into the water before their wings can support them for flight. This behavior has puzzled scientists for a long time. Now, an answer may have been found.
Travel to Antarctica is hip: You can go by yacht. You can come and go in a single day. You can even book a fly-around for New Year's Eve. And now you can stay in a five-star hotel with bespoke furnishings and its own fleet of aircraft. The guest ledger includes such names as Prince Harry and Bear Grylls.
The Arctic is a relentless and harsh wilderness and travelling in this region requires a lot of skill, equipment and knowledge. But even the most skillful hunters and Arctic residents might come into a situation, in which the difference between life and death depends on sheer luck. Three hunters from Hall Beach, Nunavut, just experienced such a situation and were rescued only by chance by Canadian military forces.