Increase twice the size of Germany: "colder weather" to blame.
Data from the National Snow and Ice Data Center (NSIDC) has indicated a dramatic increase in sea ice extent in the Arctic regions. The growth over the past year covers an area of 700,000 square kilometers: an amount twice the size the nation of Germany.
With the Arctic melting season over for 2008, ice cover will continue to increase until melting begins anew next spring.
Earth Changes
High snowfall and cold weather to blame.
A bitterly cold Alaskan summer has had surprising results. For the first time in the area's recorded history, area glaciers have begun to expand, rather than shrink. Summer temperatures, which were some 3 degrees below average, allowed record levels of winter snow to remain much longer, leading to the increase in glacial mass.
A bitterly cold Alaskan summer has had surprising results. For the first time in the area's recorded history, area glaciers have begun to expand, rather than shrink. Summer temperatures, which were some 3 degrees below average, allowed record levels of winter snow to remain much longer, leading to the increase in glacial mass.
LITTLE ROCK - A series of small earthquakes that rattled central Arkansas in recent weeks could be a sign of something much bigger to come.
By this weekend, seismologists hope to install three measurement devices to gather data about future temblors in the area. That information could show whether the rumbles come from heat-related geological changes or from an undiscovered fault - which could mean a risk of substantial earthquakes in the future.
"The potential for generating a high-magnitude earthquake is real," said Haydar Al-Shukri, director of the Arkansas Earthquake Center at the University of Arkansas at Little Rock.
By this weekend, seismologists hope to install three measurement devices to gather data about future temblors in the area. That information could show whether the rumbles come from heat-related geological changes or from an undiscovered fault - which could mean a risk of substantial earthquakes in the future.
"The potential for generating a high-magnitude earthquake is real," said Haydar Al-Shukri, director of the Arkansas Earthquake Center at the University of Arkansas at Little Rock.
Pilot whales that survived a mass stranding in Tasmania are yielding fresh insights into the mammals' little-known deep-sea lives.
Satellite tags attached to five of the surviving whales on Sunday have let scientists track the specie's movements for the first time in Australian waters.
They also worked as beacons, allowing airborne wildlife officers to find and photograph all 11 survivors swimming together.
A Tasmanian Government zoologist, Rosemary Gales, said yesterday the findings confirmed for the first time the success of a pilot whale rescue in the state, which is a hot spot for beachings.
"Everybody asks, 'How do you know whether the whales you rescue survive?' " Dr Gales said. "Well these ones have."
The small, dark-skinned pilot whales normally live in open oceans, where they dive up to 1000 metres in search of prey.
Satellite tags attached to five of the surviving whales on Sunday have let scientists track the specie's movements for the first time in Australian waters.
They also worked as beacons, allowing airborne wildlife officers to find and photograph all 11 survivors swimming together.
© Peter Lord
Tragic … 11 out of 65 whales survived the stranding.
Tragic … 11 out of 65 whales survived the stranding.
A Tasmanian Government zoologist, Rosemary Gales, said yesterday the findings confirmed for the first time the success of a pilot whale rescue in the state, which is a hot spot for beachings.
"Everybody asks, 'How do you know whether the whales you rescue survive?' " Dr Gales said. "Well these ones have."
The small, dark-skinned pilot whales normally live in open oceans, where they dive up to 1000 metres in search of prey.
Cetaceans have a bad habit of stranding themselves. Last week a large pod of 65 pilot whales stranded themselves on a beach in Tasmania. Only 11 survived.
When a similar mass stranding occured in 2003, a predator was suspected of having scared the animals onto the beach. Military use of sonar has also been linked - and cleared of causing - whale strandings.
Now there's another disaster, on a bigger scale: a huge group of about 500 narwhals have trapped themselves in sea ice in Nunavut, in Arctic Canada. The trapped animals are being culled to prevent a more painful death by starvation or suffocation as the ice closes in around them.
When a similar mass stranding occured in 2003, a predator was suspected of having scared the animals onto the beach. Military use of sonar has also been linked - and cleared of causing - whale strandings.
© Unknown
Narwhals breach.
Narwhals breach.
Now there's another disaster, on a bigger scale: a huge group of about 500 narwhals have trapped themselves in sea ice in Nunavut, in Arctic Canada. The trapped animals are being culled to prevent a more painful death by starvation or suffocation as the ice closes in around them.
US scientists have figured out how icebergs break off Antarctica and Greenland, a finding that may help predict rising sea levels as the climate warms.
Icebergs form fastest when parent ice sheets quickly spread out over the sea, the scientists say.
It's too late to help the Titanic, but this newly derived, simple law may help researchers improve their climate models and predict ice sheet break-up, they say.
Other factors, such as ice thickness, width of the ice flow, distance from land or waves, are less important, they add.
Ice cracking off into the ocean from Antarctica and Greenland could be the main contributor to global sea level rises in the future. If all the ice in Greenland and Antarctica melted, seas would rise by more than 60 meters.
Icebergs form fastest when parent ice sheets quickly spread out over the sea, the scientists say.
It's too late to help the Titanic, but this newly derived, simple law may help researchers improve their climate models and predict ice sheet break-up, they say.
Other factors, such as ice thickness, width of the ice flow, distance from land or waves, are less important, they add.
Ice cracking off into the ocean from Antarctica and Greenland could be the main contributor to global sea level rises in the future. If all the ice in Greenland and Antarctica melted, seas would rise by more than 60 meters.
They say three's a crowd, and that appears to be as true ecologically as it is socially. Researchers have discovered that an invasive ant is ruining the mutualistic relationship that has long existed between a gecko and a critically endangered flower.
The blue-tailed gecko (Phelsuma cepediana) feeds on nectar from the flowers of the Roussea simplex shrub on the island of Mauritius, pollinating the plant and dispersing its seeds.
But the invasive white-footed ant (Technomyrmex albipes) that arrived on the island in the last century has disrupted the gecko-flower relationship. The ant builds galleries of dirt on the flower where it can "farm" other insects to feed on honeydew.
The blue-tailed gecko (Phelsuma cepediana) feeds on nectar from the flowers of the Roussea simplex shrub on the island of Mauritius, pollinating the plant and dispersing its seeds.
© Dennis Hansen
Geckos have an essential pollination role with this critically endangered flower.
Geckos have an essential pollination role with this critically endangered flower.
But the invasive white-footed ant (Technomyrmex albipes) that arrived on the island in the last century has disrupted the gecko-flower relationship. The ant builds galleries of dirt on the flower where it can "farm" other insects to feed on honeydew.
American voters were faced with Hobson's choice in this election as far as global warming was concerned.
Date-Time
* Friday, November 28, 2008 at 13:42:18 UTC
* Friday, November 28, 2008 at 05:42:18 AM at epicenter
* Time of Earthquake in other Time Zones
Location 40.336°N, 126.981°W
Depth 10 km (6.2 miles) set by location program
Region OFF THE COAST OF NORTHERN CALIFORNIA
Distances
* 229 km (142 miles) W (271°) from Petrolia, CA
* 232 km (144 miles) W (264°) from Ferndale, CA
* 239 km (148 miles) W (260°) from Humboldt Hill, CA
* 243 km (151 miles) W (259°) from Eureka, CA
* 486 km (302 miles) NW (307°) from San Francisco City Hall, CA
* Friday, November 28, 2008 at 13:42:18 UTC
* Friday, November 28, 2008 at 05:42:18 AM at epicenter
* Time of Earthquake in other Time Zones
Location 40.336°N, 126.981°W
Depth 10 km (6.2 miles) set by location program
Region OFF THE COAST OF NORTHERN CALIFORNIA
Distances
* 229 km (142 miles) W (271°) from Petrolia, CA
* 232 km (144 miles) W (264°) from Ferndale, CA
* 239 km (148 miles) W (260°) from Humboldt Hill, CA
* 243 km (151 miles) W (259°) from Eureka, CA
* 486 km (302 miles) NW (307°) from San Francisco City Hall, CA
© USGS
Eureka police say they have no reports of any damage or injuries after an earthquake was recorded off the coast.
The U.S. Geological Survey says a quake with preliminary magnitude of 5.4 hit about at 5:42 a.m. Friday about 147 miles west of Eureka.
The U.S. Geological Survey says a quake with preliminary magnitude of 5.4 hit about at 5:42 a.m. Friday about 147 miles west of Eureka.
