Search Results for Tag: ice
Did you know it was the “Day of the Cryosphere” at the Warsaw climate talks COP 19 in Warsaw yesterday? If not, you might be forgiven. I haven’t seen it making the headlines in the mainstream media. That is a pity, given that what climate change is doing to our ice, snow and permafrost has repercussions for the whole planet.
DateNovember 18, 2013 | 3:35 pm
TagsAntarctic, Arctic, black carbon, Climate Change College, COP 19, cryosphere, Emissions, Himalayas, ice, permafrost, sea ice, snow, Third Pole, Warsaw
Melting permafrost eroding Siberian coasts
Rising summer temperatures and dwindling Arctic sea ice are eroding the cliffs of Eastern Siberia at an increasing pace. Scientists from AWI, the German Alfred Wegener Institute and the Helmholtz Centre for Polar and Marine Research have been evaluating data and aerial photographs of the coastal regions from the last 40 years. As the sea ice recedes more and more from year to year, the cliffs are being undermined by waves. At the same time, the land surface is beginning to sink.
The research documents warming summers. While the temperatures during the period looked at were higher than zero degrees Celsius on an average of 110 days per year, the scientists counted a total of 127 days in the years 2010 and 2011. In 2012, the number of days with temperatures above freezing increased to 134.The number of summer days on which the sea ice in the southern Laptew Sea vanishes completely is also on the increase. “During the past two decades, there were, on average, fewer than 80 ice-free days in this region per year. During the past three years, however, we counted 96 ice-free days on average. Thus, the waves can nibble at the permafrost coasts for approximately two more weeks each year,“ says AWI permafrost researcher Paul Overduin.
Not only a problem in Siberia
Sea ice plays an important role in protecting coasts from waves. When this barrier is not there, the waves dig deep and erode land away. I saw the results of this first-hand during a trip to Barrow, Alaska, in 2008. I visited sites at Point Barrow, the northernmost point of the United States, where villages had been washed into the sea. On a trip to Greenland in 2009, I was amazed to see buildings being artificially cooled to avoid them sinking into the ground as warming temperatures melt the permafrost.
In the area of Siberia investigated by the German scientists, high cliffs protect the coastline. As the permafrost melts above and waves cut in from below, the cliffs are undermined and break off.
The erosion does not only have an impact on land. It also washes material into the sea, changing the quality of the water. Depending on the kind of erosion and the particular structure of the coast, between 88 and 800 tons of plant-, animal, and microorganism-based carbon are currently washed into the sea per year and kilometer of coastline – materials which were previously sealed in the permafrost, according to the AWI researchers. Once in the water, carbon may turn into carbon dioxide and, as a result, contribute to the acidification of the oceans.
The studies were conducted as part of the PROGRESS project which is funded by the German Federal Ministry of Education and Research. PROGRESS is the acronym for Potsdamer Forschungs- und Technologieverbund für Naturgefahren, Klimawandel und Nachhaltigkeit (Potsdam Research Cluster for Georisk Analysis, Environmental Change and Sustainability).
DateOctober 31, 2013 | 1:46 pm
“Poles apart” on the Arctic?
Intrigued by a tweet from the British Guardian, “Arctic melt means more pirate chases, say Polish climate hosts”, I clicked on to the website of the organisers of this year’s UN climate talks, to be held in the Polish capital Warsaw next month. Alas, the blog where the offending entry had been posted has been temporarily closed, leaving only this message:
“For the time being we decided to take some time away from our blog. Our idea was to focus attention on important issues that need good solutions and spark discussions on those. We did not foresee that some readers would take the presented texts literally as the official Polish position. Notwithstanding we would like to express regret as some of you found the text to be inappropriate. We acknowledge these criticisms. It was certainly not our aim to offend anybody. We will take due care that all new articles and posts on this website are written in a clear and sensitive manner so as to avoid misunderstandings. Stay tuned for more ideas.”
Unbelievable. The people responsible for the COP19 website have not felt obliged to write carefully up to now? People have been able to put their own “non-official” views on there? Well, the aim of “sparking discussions” has certainly been achieved, if not in the way the conference organisers intended. I will have to refer you to the Guardian if your curiosity is aroused as to what was actually on the blog before it was closed. Let it suffice here to quote the possibility mentioned there of “chasing the pirates, terrorists and ecologists that will come to hang around…” in the developing Arctic. No wonder Greenpeace and WWF amongst others called for the post to be removed. “Pirates, terrorists and ecologists”?
Poland’s hosting of the conference is in itself controversial, given that the country receives almost all its electricity from coal. The conference partners listed on the website include PGE, the Polish Energy Group which runs several coal power plants in the country, including the largest coal-fuelled thermal power plant in Europe, Belchatow.
Poland, you will have to smarten up your act and drastically improve your communications in the run-up to a key conference that should pave the way for emissions reductions in the interest of the Arctic and the rest of the planet. Assuming you are taking this issue seriously?
DateOctober 11, 2013 | 9:55 am
Greenpeace Arctic Protest in Germany
Greenpeace campaigners were on the streets around the world on Saturday October 5th, protesting against the arrest of the Arctic Sunrise crew by the Russian coastguard. For a short summary of the background, see “Greenpeace holds rallies...” on our DW environment page.
I paid a visit to the stand set up in our local shopping centre, Bad Godesberg, to see what was happening. Greenpeace Bonn were working hard to persuade shoppers on a drizzly October morning to sign the online protest against the arrests. It was interesting to see a mix of younger and more experienced campaigners outside the town theatre. There was also quite a wide age range amongst the passers-by who stopped to find out what was happening or even sign the online petition to have the Arctic Sunrise crew freed.
The controversy has certainly brought a lot of attention to the Arctic. I have the feeling there is a growing awareness here of the whole issue surrounding climate change, melting Arctic ice, and the difficulties involved in the economic development of such an ecologically sensitive area. Still, most people do not realise how relevant the “distant” Arctic is to all of us, given the role it plays in influencing climate change as a whole, our weather patterns and, of course, with the huge Greenland ice sheet, global sea levels.
DateOctober 7, 2013 | 11:29 am
Ice Blog back online!
Apologies for the absence of icy news on the blog over the past three months. I was collecting new stories and pictures of glacier development in the Swiss Alps during a hiking holiday and unfortunately slipped on some ice. It has taken me three months to recover, but before that I did take plenty of pictures, some of which will be appearing on the blog at some point in the next few weeks. I first visited that particular area in 1984, so have photos as well as memories of the glaciers as they looked then, and now. A comparison shows major changes. Many areas which were then iced over are now completely ice free.
In the meantime, of course, there has been no shortage of news and stories in the world at large relating to the polar regions and climate, including the annual sea-ice minimum measurements and the IPCC report.
As for the sea-ice measurements, the scientists from Germany’s Alfred Wegener Institute say the fact that the sea ice covered a bigger area than last year does not mean the ice pack is recovering. Its extent is still very low compared to the long-term average, and is in line with an overall trend towards less of the stable, thicker multi-year ice. A new study published this week suggests the Arctic will be ice-free in summer within 25 years. See this summary and context from the Climate News Network: Ocean damage is worse than thought.
The IPCC report includes a lot more data on developments at the poles, which was lacking in the last report. Ice melt from the Greenland and Antarctic ice sheets are shown to be playing a much greater role in increasing sea levels than previously thought. There’s a brief summarizing article on the DW environment page.
More on the “state of the ice” in the coming week. Please look out for regular posts from your Ice Blogger again from now on. It’s great to be back in action.
DateOctober 4, 2013 | 11:04 am