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Gulf Stream at risk from Climate Change

August 28th, 2007 by John

Part of the ‘Global Ocean Conveyor Belt’, a series of giant ocean currents that flow around the earth, the Gulf stream carries vast quantities of warm Atlantic water northward giving Europe and parts of North America a temperate climate. The amount of heat involved is phenomenal, estimated by Stephen Rahmstorf, an oceanographer at Germany’s Potsdam Institute for Climate Impact Research, as equivalent to one million powerplants.

Without the Gulf stream, Northern Europe would be hardly habitable, certainly not by the present dense population.

The Gulf stream is powered by the weight of the dense, salty water of the northern part of the current which sinks, pulling the current behind it. Scientists are extremely worried that fresh water pouring into the northern ocean from melting glaciers will mix with the salt water of the current making it lighter and unable to sink. It is disturbing that from measurements taken in the last few years there is already a decline in the vigour of the circulation and studies indicate that unlike other climate changes, ocean currents can shift or stop in just a few years.

The effects of such a shut-down would push Northern Europe into semi-Arctic weather conditions, a change so profound that most people don’t even want to think about it.

Posted in Climate Change, Terminology | No Comments »

Peakfood wins Bloggers for Positive Global Change Award

August 3rd, 2007 by Leanne

Peakfood is delighted to announce that it has won a ‘Blogging for Positive Global Change Award’.  

The award was originally created by Climate of Our Future to recognise bloggers who “are trying to build awareness among their readership Bloggers for Positive Global Change Awardin order to create a more sustainable and enlightened future.”

Our thanks go to Sara from Farming Friends who was kind enough to nominate us.  Amongst other things, Sara writes a blog  of everyday life on her 250 acre arable and livestock farm.  Her video clip of a lamb being born is well worth a look.

We in turn nominate the following blogs for the Positive Global Change Award: Read the rest of this entry »

Posted in Climate Change, Peak Food in the News | 1 Comment »

Pacific Islanders are early Victims of Climate Change

July 19th, 2007 by John

It seems that the early victims of climate change will be people in places like the Pacific islands and parts of Africa who have emitted very little in the way of greenhouse gas. Cathy Marks reports in The Independent:

“Veu Lesa, a 73-year-old villager in Tuvalu, does not need scientific reports to tell him that the sea is rising. The evidence is all around him. The beaches of his childhood are vanishing. The crops that used to feed his family have been poisoned by salt water. In April, he had to leave his home when a “king tide” flooded it, showering it with rocks and debris.

“For Tuvalu, a string of nine picturesque atolls and coral islands, global warming is not an abstract danger; it is a daily reality. The tiny South Pacific nation, only four metres above sea level at its highest point, may not exist in a few decades. Its people are already in flight; more than 4,000 live in New Zealand, and many of the remaining 10,500 are planning to join the exodus. Others, though, are determined to stay and try to fight the advancing waves.

“The outlook is bleak. A tidal gauge on the main atoll, Funafuti, suggests the sea level is climbing by 5.6mm a year, twice the average global rate predicted by the UN’s International Panel on Climate Change (IPCC).

“There is not enough data yet to establish a definitive trend but that figure is alarming, implying a rise of more than half a metre in the next century. Most Tuvaluans live just one to two metres above sea level.

“Funafuti’s tranquil lagoon is adorned by a necklace of cream islets, each one tufted with dense vegetation. There used to be seven. Now there are six. The other one disappeared after a series of cyclones in the late 1990s. First, the palm trees were stripped off, then the sand, then the soil beneath. All that remains is a forlorn scrap of rubble, visible at low tide. It is an ominous indicator, in miniature, of what awaits Tuvalu’s larger, populated islands.

“Of all the low-lying nations menaced by global warming, little Tuvalu has been most vocal in the international arena. It recognised the threat early on, and successive governments have lobbied hard to alert the outside world to its predicament. The country - formerly one half of the Gilbert and Ellice Islands, a British protectorate - joined the UN and the Commonwealth in order to raise its profile, and sent diplomats on globe-trotting missions.

“Six or seven years on, Tuvaluans concluded that the international community - particularly the big industrialised nations puffing vast quantities of carbon dioxide into the atmosphere - does not care. ‘They never listened when we asked for help,’ says Enate Evi, director of the Environment Department. ‘To be honest, I think they only care about themselves, and their economic advantage. That’s how it feels, sitting here’.”

Posted in Climate Change | 1 Comment »

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