News

Arctic autumn temperature hits record high

AFP

Climate change

Artic iceflows

Melting ice caps in the Arctic create more surfaces exposed to the sun's heat - which in turn creates more melting. A NOAA report said that Arctic Autumn temperatures are the highest on record.

Credit: NOAA

- Advertisement -

WASHINGTON: Autumn temperatures in the Arctic region are a record 5 C higher than normal due the melting of the ice cap, a National Oceanic and Atmospheric Administration (NOAA) report said on Friday.

"Changes in the Arctic show a domino effect from multiple causes more clearly than in other regions," said NOAA oceanographer James Overland, lead author of the report titled The Arctic Report Card 2008.

"It's a sensitive system and often reflects changes in relatively fast and dramatic ways," the scientist said.

As the ice cap over the Arctic melts, more ocean water is exposed and heated by the sun's rays, the report said.

The warmer air and ocean water affect animal and plant life in the region and melt the permanent ice shelf, which in recent years has shrunk by some 38 cubic kilometers and is the leading cause of the global rise of sea levels.

2007 was the warmest year on record in the Arctic region, followed closely by 2008. This continues a general Arctic-wide warming trend that began in the mid-1960s.

The Arctic Report Card is a NOAA initiative begun in 2006 to monitor evolving conditions in the Arctic region, including the atmosphere, sea ice, ocean water, animal and plant life, Greenland, and the general land mass.

In the 2008 report, atmosphere, sea ice and Greenland are coded red, indicating that the changes are strongly attributed to warming. Three other areas - biology, ocean and land mass are coded yellow, indicating mixed signals.

This year, for the first time a scientific expedition was able to navigate the fabled Northwest Passage linking the Atlantic and the Pacific oceans along Arctic waters bordering Russia and North America because they were free of ice, the German institute Alfred Wegener announced on Friday.

"The scientific research vessel Polarstern returned this morning from the Arctic to Bremerhaven (northern Germany). It was the first ship to have crossed the Northwest and Northeast passages" without having to break any ice, an institute spokesman said.

The Arctic ice cap, which in August saw its largest seasonal melting since satellite observations began 30 years ago, completely disappeared in the Northwest and Northeast passages in September, the European Space Agency confirmed on October 7.