Tag Archives: Germany

Satellite mapping shows ice caps’ faster melt rate

Scientists have been able to measure more accurately than ever the thickness of the world’s major ice caps – revealing that melting is causing the loss of 500 cubic kms of ice annually. LONDON, 1 September, 2014 − German researchers have established the height of the Greenland and Antarctic ice caps with greater precision than ever before. And the new maps they have produced show that the ice is melting at an unprecedented rate. The maps, produced with a satellite-mounted instrument, have elevation accuracies to within a few metres. Since Greenland’s ice cap is more than 2,000 metres thick on average, and the Antarctic bedrock supports 61% of the planet’s fresh water, this means that scientists can make more accurate assessments of annual melting. Dr Veit Helm and other glaciologists at the Alfred Wegener Institute’s Helmholtz Centre for Polar and Marine Research in Bremerhaven, Germany, report in the journal The Cryosphere that, between them, the two ice sheets are now losing ice at the unprecedented rate of 500 cubic kilometres a year.

Big picture

The measurements used to make the maps were taken by an instrument aboard the European Space Agency’s orbiting satellite CryoSat-2. The satellite gets closer to the poles − to 88° latitude − than any previous mission and traverses almost 16 million sq km of ice, adding an area of ice the size of Spain to the big picture of change and loss in the frozen world. CryoSat-2’s radar altimeter transmitted 7.5 million measurements of Greenland and 61 million of Antarctica during 2012, enabling glaciologists to work with a set of consistent measurements from a single instrument. Over a three-year period, the researchers collected 200 million measurements in Antarctica and more than 14 million in Greenland. They were able to study how the ice sheets changed by comparing the data with measurements made by NASA’s ICESat mission.

More complex

Greenland’s volume of ice is being reduced at the rate of 375 cubic km a year. In Antarctica, the picture is more complex as the West Antarctic ice sheet is losing ice rapidly, but is growing in volume in East Antarctica. Overall, the southern continent − 98% of which is covered with ice and snow − is losing 125 cubic km a year. These are the highest rates observed since researchers started making satellite observations 20 years ago. “Since 2009, the volume loss in Greenland has increased by a factor of about two, and the West Antarctic ice sheet by a factor of three,” said Angelika Humbert, one of the report’s authors. − Climate News Network

Scientists have been able to measure more accurately than ever the thickness of the world’s major ice caps – revealing that melting is causing the loss of 500 cubic kms of ice annually. LONDON, 1 September, 2014 − German researchers have established the height of the Greenland and Antarctic ice caps with greater precision than ever before. And the new maps they have produced show that the ice is melting at an unprecedented rate. The maps, produced with a satellite-mounted instrument, have elevation accuracies to within a few metres. Since Greenland’s ice cap is more than 2,000 metres thick on average, and the Antarctic bedrock supports 61% of the planet’s fresh water, this means that scientists can make more accurate assessments of annual melting. Dr Veit Helm and other glaciologists at the Alfred Wegener Institute’s Helmholtz Centre for Polar and Marine Research in Bremerhaven, Germany, report in the journal The Cryosphere that, between them, the two ice sheets are now losing ice at the unprecedented rate of 500 cubic kilometres a year.

Big picture

The measurements used to make the maps were taken by an instrument aboard the European Space Agency’s orbiting satellite CryoSat-2. The satellite gets closer to the poles − to 88° latitude − than any previous mission and traverses almost 16 million sq km of ice, adding an area of ice the size of Spain to the big picture of change and loss in the frozen world. CryoSat-2’s radar altimeter transmitted 7.5 million measurements of Greenland and 61 million of Antarctica during 2012, enabling glaciologists to work with a set of consistent measurements from a single instrument. Over a three-year period, the researchers collected 200 million measurements in Antarctica and more than 14 million in Greenland. They were able to study how the ice sheets changed by comparing the data with measurements made by NASA’s ICESat mission.

More complex

Greenland’s volume of ice is being reduced at the rate of 375 cubic km a year. In Antarctica, the picture is more complex as the West Antarctic ice sheet is losing ice rapidly, but is growing in volume in East Antarctica. Overall, the southern continent − 98% of which is covered with ice and snow − is losing 125 cubic km a year. These are the highest rates observed since researchers started making satellite observations 20 years ago. “Since 2009, the volume loss in Greenland has increased by a factor of about two, and the West Antarctic ice sheet by a factor of three,” said Angelika Humbert, one of the report’s authors. − Climate News Network

Germany struts its renewable stuff

A guidebook with a difference is selling well in Germany. It details nearly 200 renewable energy sites it thinks will appeal to tourists. BERLIN, 11 June – Wind turbines and solar panels: do you love them or hate them? Do you think of renewable energy as the way to a greener future, or an awful blight on the present? Either way, growing numbers of German communities think they have found a silver lining: they’re touting renewables as tourist attractions. A guidebook is now available, listing about 200 green projects around the country which it thinks are, in the travel writer’s time-hallowed phrase, “worth the detour”. The publication, which has already run to a second edition after the first sold out, was supported by  Germany’s Renewable Energies Agency. Nuclear power stations are not top of every tourist’s must-see list. But the book’s author, Martin Frey, says a nuclear plant in Kalkar, a town on Germany’s border with the Netherlands, is the world’s safest. It pulls in more than half a million visitors annually. Safe? It should be, because local protests – driven partly by the 1986 Chernobyl accident – meant it never started operation. Now it’s an amusement park offering hotels with all-inclusive holidays, restaurants and merry-go-rounds. Its most popular attraction is a gigantic cooling tower with a climbing wall outside and a carousel inside.

Blast from the past

Another strictly retired “attraction” listed is Ferropolis, the City of Iron. Located on the site of a former brown coal (lignite) opencast mine in the eastern German state of Saxony-Anhalt, it’s a bit of an oddity in Frey’s list – an open-air museum, preoccupied not with emerging technologies but with echoes of one that many hope has had its day. Huge redundant metal structures, immense excavators and towering cranes, all abandoned, give Ferropolis the air of a post-apocalypse movie. But in a nod to the future the roof of a former workshop is covered with solar panels which help to power the museum’s annual summer music festivals. Germany is moving rapidly away from the past which Ferropolis evokes in its switch to renewable energy. In the last decade renewable power generation has tripled and now provides a quarter of the country’s electricity and about 380,000 jobs. Wind, hydro, solar and biogas plants are taking over from coal and nuclear power. The change is evident right at the heart of the nation’s political life. The glass dome of the Reichstag, a tourist magnet which stands resplendent on the Berlin skyline, contains a cone covered with 360 mirrored plates, which reflect sunlight and illumine the plenary hall below. And there’s more: a heat exchanger inside the cone’s ventilation shaft significantly reduces the building’s power consumption.

Steep climb

The Reichstag also boasts an array of solar panels, and half its electricity and most of its heat come from two combined heat and power generators beneath the building, which run on bio-diesel. If you want to combine some mildly energetic activity with your environmental sightseeing, then head for Lower Saxony where you’ll find the Holtriem wind farm. The largest in Europe when it was built, with a total capacity of 90 MW, it has an observation platform on one of the turbines, 65 m above ground. That offers tourists – if they’re prepared to climb the 297 steps to the top – a stunning view of the North Sea and, in good weather, the East Frisian islands. Also in Lower Saxony is Juehnde, the first German village to achieve full energy self-sufficiency. Its combined heat and power plant produces twice as much energy as Juehnde needs. The villagers are so keen to share their experience that they built a New Energy Centre to win over visitors. Frey, a journalist specialising in renewable energy, says he wrote the book because he’d been impressed by a large number of innovative renewable projects and wanted to share them with tourists as well as experts. – Climate News Network * Germany: Experience Renewable Energies, published by Baedeker, is available in German (and only in print) for €16.99. An English language version may be produced if there is enough demand. Komila Nabiyeva is a Berlin-based freelance journalist, reporting on climate change, energy and development.

A guidebook with a difference is selling well in Germany. It details nearly 200 renewable energy sites it thinks will appeal to tourists. BERLIN, 11 June – Wind turbines and solar panels: do you love them or hate them? Do you think of renewable energy as the way to a greener future, or an awful blight on the present? Either way, growing numbers of German communities think they have found a silver lining: they’re touting renewables as tourist attractions. A guidebook is now available, listing about 200 green projects around the country which it thinks are, in the travel writer’s time-hallowed phrase, “worth the detour”. The publication, which has already run to a second edition after the first sold out, was supported by  Germany’s Renewable Energies Agency. Nuclear power stations are not top of every tourist’s must-see list. But the book’s author, Martin Frey, says a nuclear plant in Kalkar, a town on Germany’s border with the Netherlands, is the world’s safest. It pulls in more than half a million visitors annually. Safe? It should be, because local protests – driven partly by the 1986 Chernobyl accident – meant it never started operation. Now it’s an amusement park offering hotels with all-inclusive holidays, restaurants and merry-go-rounds. Its most popular attraction is a gigantic cooling tower with a climbing wall outside and a carousel inside.

Blast from the past

Another strictly retired “attraction” listed is Ferropolis, the City of Iron. Located on the site of a former brown coal (lignite) opencast mine in the eastern German state of Saxony-Anhalt, it’s a bit of an oddity in Frey’s list – an open-air museum, preoccupied not with emerging technologies but with echoes of one that many hope has had its day. Huge redundant metal structures, immense excavators and towering cranes, all abandoned, give Ferropolis the air of a post-apocalypse movie. But in a nod to the future the roof of a former workshop is covered with solar panels which help to power the museum’s annual summer music festivals. Germany is moving rapidly away from the past which Ferropolis evokes in its switch to renewable energy. In the last decade renewable power generation has tripled and now provides a quarter of the country’s electricity and about 380,000 jobs. Wind, hydro, solar and biogas plants are taking over from coal and nuclear power. The change is evident right at the heart of the nation’s political life. The glass dome of the Reichstag, a tourist magnet which stands resplendent on the Berlin skyline, contains a cone covered with 360 mirrored plates, which reflect sunlight and illumine the plenary hall below. And there’s more: a heat exchanger inside the cone’s ventilation shaft significantly reduces the building’s power consumption.

Steep climb

The Reichstag also boasts an array of solar panels, and half its electricity and most of its heat come from two combined heat and power generators beneath the building, which run on bio-diesel. If you want to combine some mildly energetic activity with your environmental sightseeing, then head for Lower Saxony where you’ll find the Holtriem wind farm. The largest in Europe when it was built, with a total capacity of 90 MW, it has an observation platform on one of the turbines, 65 m above ground. That offers tourists – if they’re prepared to climb the 297 steps to the top – a stunning view of the North Sea and, in good weather, the East Frisian islands. Also in Lower Saxony is Juehnde, the first German village to achieve full energy self-sufficiency. Its combined heat and power plant produces twice as much energy as Juehnde needs. The villagers are so keen to share their experience that they built a New Energy Centre to win over visitors. Frey, a journalist specialising in renewable energy, says he wrote the book because he’d been impressed by a large number of innovative renewable projects and wanted to share them with tourists as well as experts. – Climate News Network * Germany: Experience Renewable Energies, published by Baedeker, is available in German (and only in print) for €16.99. An English language version may be produced if there is enough demand. Komila Nabiyeva is a Berlin-based freelance journalist, reporting on climate change, energy and development.