Science news: Greenland's melting ice

The glacier at Ilulassit in Western Greenland Photo: the glacier at Ilulassit in Western Greenland

In early September, leaders from the major faiths came together in Greenland to pray for the future of the planet. They may well have chosen Greenland because of the visible and deeply worrying changes in the glaciers and ice fields that cover almost all its vast area. The melting of the ice sheet has speeded up dramatically since 2000.

The state of Greenland's glaciers is critical to the rate of global sea level rise. A complete melting of the island's ice would raise water levels by about 7 metres, enough to flood much of the world's inhabited land. To give one example, 15% of Bangladesh's population would be displaced by a rise of just 1.5 metres. Almost all the country's habitable land would disappear if the water level rises by 7m.

The religious leaders went to the town of Ilulissat on Greenland's western coast. Here a rapidly retreating glacier calves icebergs into a fjord at a rate of 35bn tonnes of water a year. The daily water loss would provide all the water London or New York needs for a year. Estimates suggest that between 6.5% and 10% of all the ice flowing off the interior icefields of Greenland melts into this fjord. This means that the increase in the rate of melt of this one glacier is adding about 0.06mm a year to the global sea level, 4% of the rate of rise during the 20th century.

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The rise and rise of Climate Care

Drawing: the Indian treadle pump backed by Climate Care

Climate Care, the leading UK carbon offset company, has had an eventful few weeks. A few days after receiving an unexpected visit from climate activists who presented management with a basket of red herrings, the company put out a press release claiming that it would offset 1% of the UK's total carbon emissions next year. In sixty projects around the third world, Climate Care claims that it will reduce emissions in 2008 by 6m tonnes, or ten times as much as it has done this year. It is claiming spectacular growth rates. Continuous critical attention from newspapers and sceptical greens does not appear to have dented Climate Care's prospects one iota.

The core problems with offsetting are two-fold:

  • guaranteeing additionality (ensuring that the investments in carbon reduction wouldn't have happened anyway)
  • verifying the reductions.

Climate Care fails on both of these two important issues. Though Climate Care is getting increasingly tetchy with its critics, the blunt truth is that the company simply doesn't deliver genuine and quantifiable cuts in emissions. Increasingly, it works as an international development agency rather than as a business balancing one person's emissions with a reduction in another's. Climate Care may do a lot of good around the world, but it doesn't cut carbon dioxide emissions in a reliable or auditable way.

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