Posted on August 30, 2015 by Bob Berwyn
Marine conservation advocates say new seismic airgun blasting in the Arctic Ocean threatens whales and other marine life. Photo courtesy NOAA.
Seismic blasting east of Greenland raises concerns about impacts to marine mammals
FRISCO — The Arctic Ocean north of Alaska isn’t the only area increasingly at risk from oil and gas exploitation. Oil companies are exploring the seabed off the eastern coast of Greenland, and the seismic blasting is likely harm whales and other marine life.
Oil companies use seismic equipment to map underground oil and gas reserves with airguns that emit 259 decibel blasts, a sound intensity would be perceived by humans as approximately eight times louder than a jet engine taking off. Continue reading
Filed under: biodiversity, endangered species, energy, Environment, gas drilling, Marine biology, ocean conservation, oil drilling | Tagged: Arctic Ocean, energy, Environment, marine mammals, narwhals, seismic blasting | 1 Comment »
Posted on July 22, 2015 by Bob Berwyn
Shell gets OK for exploratory drilling in the Arctic Sea.
Conditional permits limit operations and set protections for marine mammals
FRISCO — Shell’s Arctic drill plans got a green light from federal regulators today, as the Bureau of Safety and Environmental Enforcement issued a pair of conditions permits for limited exploratory drilling in the Chukchi Sea, off the coast of Alaska.
The permits limit Shell to drilling in the top sections of wells. The company won’t be allowed to probe deep in into the oil-bearing zones until well-capping equipment is on hand and deployable within 24 hours — which still leaves enough time for thousands of gallons of crude to leak into the sensitive and pristine Arctic Ocean. Continue reading
Filed under: Arctic, climate change, energy, Environment, gas drilling, global warming, oil drilling | Tagged: Arctic drilling, Arctic Ocean, Chukchi Sea, disaster waiting to happen, Environment, global warming, marine mammals, OilSpill, Shell Oil | 2 Comments »
Posted on December 5, 2013 by Bob Berwyn
Warmer seas don’t always take up more carbon
By Summit Voice
FRISCO — As sea ice inexorably declines, the Arctic Ocean has started to absorb more carbon — by some as estimates, as much as one additional megaton each each, thanks to increased biological productivity.
But those effects are not spread evenly across the region, according to a new study that paints a nuanced picture of how global warming is changing the carbon cycle in the Arctic. The MIT research team modeled changes in Arctic sea ice, temperatures, currents, and flow of carbon from 1996 to 2007, and found that the amount of carbon taken up by the Arctic increased by 1 megaton each year.
But their detailed analysis found that some areas of the Arctic where temperatures have warmed the most are actually storing less carbon. Instead, these regions — including the Barents Sea, near Greenland — have become a carbon source, emitting carbon dioxide to the atmosphere. Continue reading
Filed under: Arctic, climate and weather, global warming | Tagged: Arctic Ocean, carbon cycle, climate change | Leave a comment »
Posted on September 25, 2013 by Bob Berwyn
Deep waters in the Greenland Sea are warming.
Abysmal sea temps in region rising 10 times faster than global average
By Summit Voice
FRISCO — Changing ocean dynamics have resulted in a distinct warming of deep waters in the Greenland Sea.
Since the 1980s, the water temperature between 2000 meters depth and the sea floor has risen by 0.3 degrees Celsius — enough heat energy to raise surface temperatures over Europe significantly. The rate of warming is about 10 times higher than the global average.
“This sounds like a small number, but we need to see this in relation to the large mass of water that has been warmed,” said Dr. Raquel Somavilla Cabrillo, who led the study for the Alfred Wegener Institute for Polar and Marine Research.
“‘The amount of heat accumulated within the lowest 1.5 kilometres in the abyssal Greenland Sea would warm the atmosphere above Europe by 4 degrees centigrade. The Greenland Sea is just a small part of the global ocean. However, the observed increase of 0.3 degrees in the deep Greenland Sea is ten times higher than the temperature increase in the global ocean on average,” Somavilla said. Continue reading
Filed under: Arctic, climate and weather, global warming, Greenland | Tagged: Arctic, Arctic Ocean, climate change, Environment, global warming, Greenland Sea | 3 Comments »
Posted on August 1, 2013 by Bob Berwyn
New models look at year-round ice-free conditions to find parallels with Pliocene epoch
By Summit Voice
FRISCO — As atmospheric concentrations of carbon dioxide start to hover around 400 parts per million, climate scientists have been looking back about 3 to 5 million years, to the Pliocene Epoch — the last time heat-trapping greenhouse gases were at a similar level.
But temperatures during the Pliocene were about 3.5 to 9 degrees Fahrenheit warmer than today and the sea level was 65 to 80 feet higher. Until now, scientists have assumed that there’s a time lag between atmospheric CO2 levels and the subsequent temperature increases that melt ice and drive ocean levels up. Continue reading
Filed under: Arctic, climate and weather, Environment, global warming | Tagged: Arctic Ocean, Arctic sea ice, climate science, global warming, Pliocene, sea level, University of Colorado Boulder | Leave a comment »
Posted on April 6, 2013 by Bob Berwyn
The map at top shows the ages of ice in the Arctic at the end of March 2013; the bottom graph shows how the percentage of ice in each age group has changed from 1983 to 2013. Credit: NSIDC courtesy J. Maslanik and M. Tschudi, University of Colorado.
Seasonal shift begins in northern latitudes
By Summit Voice
FRISCO — It’s just the very start of the melt season in the Arctic, but sea ice has already dropped below last year’s level, which ended with a record low extent in September.
In the early April update, the National Snow and Ice Data Center reported that levels of multiyear ice remain extremely low. Satellite data suggests that first-year ice may now cover the North Pole area for the first time since the winter of 2008.
For March, the average extend was about 5.81 million square miles, which is about 274,000 square miles below the 1979 to 2000 average extent, and about 236,000 square miles above the record low for the month, set in 2006. March sea ice extent is declining at a rate of about 2.5 percent each decade, losing about 15,300 square miles per year, (about the size of Maryland and Delaware combined). Continue reading
Filed under: climate and weather, Environment, global warming, seasons | Tagged: Arctic, Arctic Ocean, Arctic sea ice, climate, Environment, global warming, National Snow and Ice Data Center | Leave a comment »
Posted on March 15, 2013 by Bob Berwyn
Equipment failures, environmental violations and lack of oversight need to be addressed before moving ahead with drilling plans
Feds tell Shell to rethink Arctic offshore drilling plans.
* More coverage of Shell’s Arctic drilling program
By Summit Voice
FRISCO — Eager to exploit the Arctic for fossil fuel resources and to live up to shareholder expectations, Royal Dutch Shell rushed into its offshore drilling program without being “fully prepared in terms of fabricating and testing certain critical systems and establishing the scope of its operational plans,” according to a U.S. Department of Interior report released this week.
Key failures included Shell’s inability to get certification for an oil spill containment system required to be on site in the event of a loss of well control. The report said the company’s failure to deploy the system was due “to shortcomings in Shell’s management and oversight of key contractors.”
The review was launched after a string of well-publicized problems culminated with a runaway drill rig that ended up running aground on a remote Alaskan island. The company is also under investigation for a string of violations of various environmental requirements. In February, Shell announced a one year pause in its Arctic drilling program to address the shortcomings. Continue reading
Filed under: Arctic, energy, Environment, gas drilling, oil drilling | Tagged: Alaska, Alaska offshore oil drilling, Arctic drilling, Arctic Ocean, offshore drilling, Royal Dutch Shell, Shell Oil | 1 Comment »