Posted on August 26, 2014 by Bob Berwyn
An extratropical cyclone spread heavy rain across the UK in February 2014. Visit this NASA website for more.
More coastal damage likely as rising seas fuel storm surges
FRISCO —British scientists aren’t quite ready to say that last winter’s record flooding is linked with human-caused global warming, but in a recent study published in the journal Nature Climate Change, they warned that more coastal flooding is likely as sea level rises. Continue reading
Filed under: climate and weather, extreme weather, global warming | Tagged: Arctic sea ice, climate attribution studies, climate change, global warming, Jet stream, UK 2014 flooding | Leave a comment »
Posted on August 23, 2014 by Bob Berwyn
The Fram Strait is a key link in the global ocean circulation system, as the passage for most of the Arctic sea ice exiting the region.
Detailed ocean sediment layers paint clear picture of link between Arctic sea ice movement and ocean currents
FRISCO — An extraordinarily clear deposit of layered seafloor sediments has helped researchers explain the connection between Arctic sea ice movement and the movement of key ocean currents that redistribute warm water across the northern hemisphere.
Specifically, the new study by scientists with the Alfred Wegener Institute in Germany looked at the movement of sea ice through the Fram Strait, between Greenland Svalbard, finding that, when massive quantities of Arctic ice melt and move south through the strait, the Gulf Stream slows, cooling the climate in Europe. Continue reading
Filed under: Arctic, climate and weather, global warming | Tagged: Arctic sea ice, climate change, Fram Strait, Gulf Stream | Leave a comment »
Posted on June 15, 2014 by Bob Berwyn
Antarctic sea ice at record high; northern hemisphere snow cover shows rapid spring decline
Low spring snow cover in the northern hemisphere.
FRISCO — Arctic sea ice extent in May was about a quarter of a million square miles below the 1981-2010 average, ending up as the third-lowest on record for the month, according to the latest update from the National Snow and Ice Data Center.
By contrast, sea ice extent around Antarctica is at a record high, almost half a million square miles above the 1981-2010 baseline, marking the highest May Antarctic sea ice extent on record. Read the full NSIDC report here. Continue reading
Filed under: Arctic, climate and weather, global warming, Greenland | Tagged: Arctic sea ice, climate, climate change, global warming, northern hemisphere snow cover | 1 Comment »
Posted on April 8, 2014 by Bob Berwyn
Arctic sea ice extent is declining at 2.6 percent each decade.
March surge boosts extent late in the season
FRISCO — Arctic sea ice grew to its maximum extent for the year on March 21, reaching 5.70 million square miles. According to the National Snow and Ice Data Center, it was the fifth-lowest maximum extent in the satellite monitoring era, starting in 1978. The lowest maximum extent occurred in 2011, at 5.65 million square miles.
The average date for maximum sea ice extent is March 9, just a couple of weeks after the spring equinox, but the date varies from year to year. The latest maximum on record was in 2011, when sea ice extent expanded through March 31. Through 2014, the linear rate of decline for March ice extent is 2.6 percent per decade relative to the 1981 to 2010 average. Continue reading
Filed under: Arctic, climate and weather, global warming | Tagged: Arctic climate change, Arctic sea ice, climate change, Environment | 1 Comment »
Posted on April 1, 2014 by Bob Berwyn
Melt pond on Arctic sea ice. Photo courtesy Polarstern.
Polar ice cap losing ground to global warming
FRISCO — While the Earth still sports an impressive mid-winter polar ice cap, more and more research suggests that global warming is eating away at the ice from the edges and from beneath, as warmer ocean temperatures delay the onset of sea ice formation.
On a geological scale, the pace is astounding. The length of the melt season for Arctic sea ice is growing by several days each decade, and an earlier start to the melt season is allowing the Arctic Ocean to absorb enough additional solar radiation. In some areas that heat is enough to melt as much as four feet of the Arctic ice cap’s thickness, according to a new study by National Snow and Ice Data Center and NASA researchers.
Filed under: Arctic, climate and weather, global warming | Tagged: Arctic sea ice, climate change, global warming, polar ice cap albedo | Leave a comment »
Posted on March 9, 2014 by Bob Berwyn
This year’s winter extent likely to be one of the lowest on record
Arctic sea ice extent this winter has been hovering near a record low. Graphic courtesy NSIDC.
By Summit Voice
FRISCO — With just a few more days to go before Arctic sea ice starts its annual retreat, it looks like this year’s maximum extent will be one the lowest on record. Sea ice extent has been tracking below average nearly all winter and dropped below previous record low levels in early February, staying there ever since.
The extent generally peaks in mid-March before it starts to give way to warmer air temperatures and longer days with more hours of sunlight. This year, temperatures in the Arctic have been distinctly higher than average, resulting in a slower than average expansion of the winter ice cover. Overall, sea ice grew at a rate about 26 percent slower than the 1981 to 2010 average. Continue reading
Filed under: Arctic, climate and weather, global warming | Tagged: Arctic, Arctic sea ice, climate change, global warming | 1 Comment »
Posted on March 5, 2014 by Bob Berwyn
Autumn freeze coming 11 days later in some regions
There’s probably no stopping the decline of Arctic sea ice.
By Summit Voice
FRISCO — Averaged across the Arctic, the melt season is lengthening by five days each decade, with much of the change coming in the fall, when a warmer ocean simply takes longer to freeze than in the past.
“The extent of sea ice in the Arctic has been declining for the last four decades,” said University College London researcher Julienne Stroeve, part of a research team that studied satellite data to track sea ice trends in the age of global warming.
The data confirm that the Arctic Ocean absorbing ever more of the sun’s energy in summer, leading to an ever later appearance of sea ice in the autumn. In some regions, autumn freeze-up is occurring up to 11 days per decade later than it used to. Continue reading
Filed under: Arctic, climate and weather, global warming | Tagged: Arctic sea ice, climate, global warming, sea ice extent | 2 Comments »