By Alister Doyle – Posted 2012/09/18 at 5:46 pm EDT
OSLO, Sep. 18, 2012 (Reuters) — Local pollution in the Arctic from shipping and oil and gas industries, which have expanded in the region due to a thawing of sea ice caused by global warming, could further accelerate that thaw, experts say.
The United Nations Environment Program (UNEP) said there was an urgent need to calculate risks of local pollutants such as soot, or “black carbon”, in the Arctic. Soot darkens ice, making it soak up more of the sun’s heat and quickening a melt.
Companies such as Shell, which this week gave up a push to find oil this year in the Chukchi Sea as the winter closed in, Exxon or Statoil say they are using the cleanest available technologies.
But the risks of even small amounts of pollution on the Arctic Ocean, emitted near ice with little dispersal by winds, have not been fully assessed.
“A lot of the concerns need urgent evaluation,” said Nick Nuttall, spokesman of Naibori-based UNEP, referring to issues such as flaring of gas or fuels used by vessels in the Arctic.
“There is a grim irony here that as the ice melts…humanity is going for more of the natural resources fuelling this meltdown,” he said. Large amounts of soot in the Arctic come from more distant sources such as forest fires or industry.
The extent of sea ice on the Arctic Ocean has shrunk this summer to the smallest since satellite records began in the 1970s, eclipsing a 2007 low. The melt is part of a long-term retreat blamed by a U.N. panel on man-made global warming, caused by use of fossil fuels.
“We’re working to get a better documentation of the risks of black carbon in the Arctic,” said Lars-Otto Reiersen, head of the Arctic Monitoring and Assessment Program (AMAP), part of the Arctic Council.
An AMAP report last year said that “regulation of black carbon production from all sources, especially those resulting locally from activities in the Arctic, is required at all scales.”
More than 400 oil and gas fields within the Arctic region were developed by 2007, according to AMAP, mostly in West Siberia in Russia and in Alaska. Most of the undiscovered oil and gas is now estimated to be offshore.
Soot is an extra problem for planners, adding to risks such as of an oil blowout or a shipwreck. The U.N.’s International Maritime Organization is trying to work out a new “Polar Code” that might tighten everything from emissions to hull standards.