Search Results for Tag: research
Will Antarctic share Arctic’s fate?
While the Arctic is melting twice as fast as the rest of the planet, and protests continue against the race for oil at huge risk to the sensitive environment, the icy regions around the south pole were long considered immune to climate change. But melting glaciers on the Antarctic Peninsula in recent years sparked doubts in the scientific community about just how stable the western region of Antarctica really is. Earlier this year, I wrote an article on the irreversible melt of the Pine Island glacier on western Antarctica. The huge iceberg that broke off last November has been in the news again, heading for the open sea.
Only the huge icy vastness of Eastern Antarctica still appeared to be safe from the perils of a warming climate. Now experts from Germany’s Potsdam Institute for Climate Impact Research (PIK) have published findings indicating that this too might no longer be the case. In a study published in “Nature Climate Change“, they write that the melting of just a small volume of ice on the East Antarctic coast could ultimately trigger a discharge of ice into the ocean which would result in unstoppable sea-level rise. They are talking about tomorrow or the next decade. Still, the prospect of more irreversible thawing in the Antarctic is a very worrying one.
“Previously, only the West Antarctic was thought to be unstable. Now we know that the eastern region, which is ten times bigger, could also be at risk”, says Anders Levermann, co-author of the study. The findings are based on computer simulations which make use of new, improved data from the ground beneath the ice sheet.PIK scientist Levermann was one of the lead authors of the sea-level section in the latest IPCC report.
“The Wilkes Basin in East Antarctic is like a bottle that is tilted”, says Matthias Mengel, lead author of the new study.”If you take out the cork, the contents will spill out”. At the moment, the “cork” is formed by a rim of ice at the coast. If that were to melt, the huge quantities of ice it holds back could shift and flow into the ocean, raising sea levels by three to four meters. Although air temperatures over Antarctica are still very low, warmer ocean currents could cause the ice along the coast to melt.
So far, there are no signs of warmer water of this sort heading for the Wilkes Basin. Some simulations suggest though that the conditions necessary for the “cork” to melt could arise within the next 200 years. Even then, the scientists say it would take around 2000 years for sea level to rise by one meter.
According to the simulations, it would take 5,000 to 10,000 years for all the ice in the affected region to melt completely. “But once this has started, the discharge will continue non-stop until the whole basin is empty”, says Mengel. “This is the basic problem here. By continuing to emit more and more greenhouse gases, we could well be triggering reactions today that we will not be able to stop in the future. ” Indeed.
The IPCC report predicts a global sea-level rise of up to 16 centimeters this century. As this could already have devastating impacts on many coastal areas around the globe, any additional factor is of key importance to the calculations. “We have presumably overestimated the stability of East Antarctica”, says Levermann. Even the slightest further increase in sea level could aggravate flooding risks for coastal cities like New York, Tokyo or Mumbai.
At the moment, the largest contribution to Antarctic ice loss and rising sea levels comes from the Pine-Island glacier in West Antarctica. As I mentioned at the start, a huge iceberg, which broke off from the glacier last year, is currently floating into the open waters of the Southern Ocean. French glaciologist Gael Durand from Grenoble University told me in an interview the huge glacier had already reached a point where its continued melting is irreversible, regardless of air temperature or ocean conditions.
DateMay 5, 2014 | 2:51 pm
Why high suicide rates in Arctic Russia?
Back at DW headquarters in Bonn after returning from Arctic Frontiers in Tromso at the weekend, I am sorting out notes and interviews with a wide range of experts on Arctic issues from all over the world.
One interview I would like to share with you here on the Ice Blog is a talk I had with Dr Yuri Sumarokov from the Northern State Medical University in Archangelsk in north-west Russia. It is the northernmost medical school in Russia and has a special focus on research into Arctic medicine and issues affecting the health of people in the Arctic.
People in the Arctic regions of Russia have a much higher suicide rate than in other parts of the country. The rate is higher again amongst indigenous people. Sumarakov, himself a medical doctor, shared some insights into the ongoing research with me. The topic is not new and certainly not limited to Russia. It seems though to be a topic that is not talked about enough, especially amongst politicians – and in the media. So let’s make a start. Please have a listen. There is plenty of food for thought and I for one feel motivated to find out a little more:
DateJanuary 28, 2014 | 1:47 pm
Kids, POPS and Arctic Science
Norway, believe it or not, is having problems recruiting scientists and qualified personnel for the Arctic. The generous education system attracts plenty of foreign students, it seems. But there is a lack of Norwegian PhD students. Not that the country doesn’t welcome foreign students, but understandably they would like to have people who stay on in the Norwegian Arctic as well as those who take their qualifications back home to wherever. For that reason, the Arctic Frontiers conference and APECS, the Association of Polar Early Career Scientists decided to “start them young” and invited pupils from two local schools to an Arctic science workshop in the planetarium of the Tromso Science Centre, the country’s northernmost. As I arrived, I found myself overtaken by youngsters rushing down to have a look at the gadgetry and a hands-on shot at scientific experiments. This is the kind of place that interests young people in the workings of nature and technology.
Kirsten and Ida talked to me (in English, great language skills) about their project. They had made a poster of the type displayed at scientific conferences. Their subject: Persistant Organic Pollutants, POPs. They told me the increasing concentration of these up here in the remote Arctic environment is something that worries them.
The posters are entered in a competion, with awards and attendance at next year’s big Arctic conference event awaiting the winners. The girls were reserving judgement about whether Arctic science would be their future careers. But they were willing to give it due consideration and looking forward to the “science show” at the planetarium. Let’s see which pupils turn up here again next year!
Centre Director Tove Marienborg demonstrates the energy involved in using the “Spark” or kick-sled.
DateJanuary 24, 2014 | 12:20 pm
Rovaniemi: Finland and the Arctic
Rovaniemi is where I would like to have spent the last few days. From Dec. 2nd to 4th, the first of a series of Arctic conferences was held there, organized by the city of Rovaniemi and the Arctic Centre of the University of Lapland.
Rovaniemi, a Finnish town right on the edge of the Arctic circle, is known to “Arctic buffs” because of the “Rovaniemi Process”, a Finnish initiative for Arctic environmental co-operation, which ultimately led to the adoption of the “Arctic Environmental Protection Strategy”, signed in Rovaniemi in 1991. This in turn played an important role in the establishment of the Arctic Council
In the spirit of that “Rovaniemi Process”, the city and the University’s Arctic Centre decided to organize a series of conferences, this being the first one. Finland, like all the northern states, is trying to assert its position in the region against the background of climate change and growing international interest.
Earlier this year, I received a copy of a very useful booklet produced by the Arctic Centre of the University of Lapland. It’s entitled “The Arctic Calls. Finland, the European Union and the Arctic Region“. The authors are Markku Heikkilä and Marjo Laukkanen, both based at the Arctic Centre. Its aim is to “put a human face on the Arctic Region”, and it does that very well, looking across the whole region. President Sauli Niinistö wrote the foreword to the publication. He mentions Finland’s initiative to establish an EU Arctic Information Centre in Rovaniemi, which I am following with interest.
The European Union Arctic Information Centre (EUAIC) initiative is an international network of 19 leading Arctic research and outreach institutions from the various European Union Members States, and the EEA countries. It was started in 2009 as a professional network of European institutions aiming to provide information, outreach and insight into Arctic issues. The network’s objective is to provide the European Union, its citizens, institutions, companies and member states with a reliable source of information on what is happening in and concerning the Arctic. The EUAIC initiative network aims to “facilitate two-way communication between experts, decision makers, stakeholders and the public”, according to its website.
The initiative is organized as a network, making use of existing expertise and the infrastructures of its members. Its headquarters are located at the Arctic Centre in Rovaniemi. Currently there are nineteen partners. The European Commission selected the consortium to carry out a key one million euro project to produce a “Strategic Environmental Impact Assessment of development of the Arctic”. The project should be completed in 2014 and should make for interesting reading.
Bearing all this in mind, it’s worth keeping an eye on what comes out of the Rovaniemi conference. And I’d recommend the publication, “The Arctic Calls”, ISBN 978-952-281-065-6. It has interesting interview, maps, photos and insight. You can also get it from the Arctic Centre or download an online version.
Let me just finish by quoting from the final pages:
“The images of icebergs drifting out to sea have turned from symbols of freshness to symbols of disappearance. They have become images of a unique world that is undergoing drastic change and is about to lose many of its characteristics.” How right you are.
DateDecember 5, 2013 | 3:19 pm
Polar regions hit by ocean acidification
Did you notice much about the problem of CO2 in the oceans in the (already minimal in most places) coverage of the Warsaw climate conference? A summary of the report published recently by the International Programme on the State of the Oceans (IPSO) was presented at the meeting to draw attention to the dangers posed by acidification for ecosystems, humankind and, in form of a feedback effect, for the climate warming which is causing it in the first place. If that sounds complicated, but intriguing enough to warrant further interest, you might want to listen to an interview I recorded this week with Alex Rogers. He is a Professor of Conservation Biology at the Dept. of Zoology and a Fellow of Somerville College, University of Oxford. Amongst his many other titles, he’s the Scientific Director of IPSO. He told me it was a “fascinating coincidence” that the report was published just after the latest IPCC report, which noted, amongst other things, that atmospheric temperatures hadn’t risen as much over the last ten years or so as had been expected. One main reason suggested is that the excess heat is being taken up by the ocean, especially the deep ocean. And that fits perfectly with the findings of the big ocean survey and collation of data, says Prof. Rogers.
I also talked to Ulf Riebesell from the Helmholtz Institute for Ocean Research in Kiel, Germany, a lead author of the report and the scientist who has been in charge of the in situ acidification experiments in the Arctic .You might also enjoy in my report from that venture.
That interview is in German, so I’m not putting it up here, but the content will be flowing into an article for the DW website very soon. Meanwhile, here’s Professor Rogers:
DateNovember 29, 2013 | 1:30 pm