Awheel in Tasmania

Somewhere near Strahan
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One of our readers, contributor and stellar mate on a road trip in Tasmania.

Thanks, Honeyman

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Canadian glaciers have become a major contributor to sea level change


Click to enlargeNASA/John Sonntag

❝ Ice loss from Canada’s Arctic glaciers has transformed them into a major contributor to sea level change, new research by University of California, Irvine glaciologists has found.

From 2005 to 2015, surface melt off ice caps and glaciers of the Queen Elizabeth Islands grew by an astonishing 900 percent, from an average of three gigatons to 30 gigatons per year, according to results published…in the journal Environmental Research Letters

❝ The team found that in the past decade, overall ice mass declined markedly, turning the region into a major contributor to sea level change. Canada holds 25 percent of all Arctic ice, second only to Greenland…

❝ The Canadian ice cap has glaciers on the move into the Arctic Ocean, Baffin Bay and Nares Strait. The researchers used satellite data and a regional climate model to tally the “balance” of total gain and loss each year, and the reasons why. Because of the huge number of glaciers terminating in area marine basins, they expected that discharge into the sea caused by tide water hitting approaching glacier fronts would be the primary cause.

In fact, they determined that until 2005, the ice loss was caused about equally by two factors: calving icebergs from glacier fronts into the ocean accounted for 52 percent, and melting on glacier surfaces exposed to air contributed 48 percent. But since then, as atmospheric temperatures have steadily climbed, surface melt now accounts for 90 percent.

❝ Lead author Romain Millan said that in recent years ice discharge was only a major component in a few basins, and that even rapid, short term increases from these ice fields only had a minor impact on the long-term trend.

Millan added, “We identified meltwater runoff as the major contributor to these ice fields’ mass loss in recent years…

Just keeping y’all up-to-date, folks. Climate change deniers won’t spend any of their bought-and-paid-for time checking scientific study. Folks with a real interest in real science enjoy the practice.

NASA Receives First Audio From New Planets

BREAKING NEWS, WORLD NEWS

❝ RADIO signals emerging from the newly-discovered ‘TRAPPIST-1’ planetary system have been decoded by linguistic experts at NASA, confirming the existence of extraterrestrial lifeforms who want ‘no part of Earth’s bullshit’.

❝ There was great excitement from astronomy enthusiasts earlier this week following the discovery of seven planets in the ‘habitable’ zone of a nearby solar system; planets which seemingly had all the criteria for supporting life.

However, this was eroded somewhat today when NASA announced that lifeforms on the third of these planets seemed to be ‘standing very still as if not to be noticed’, much like how someone would hide behind the sofa in their house if a TV licence inspector or debt collector came to the door.

❝ …A signal from the planet was received and later translated, and appears to show that the alien lifeforms were well aware of the existence of Earth.

“The transmission begins ‘Oh fucking bollocky bollocks’” said a spokesperson for NASA…

❝ “‘They’ve found us, well that’s just tickety-fucking-boo’. The conversation then breaks down into a series of back-and-forth arguments where the aliens appear to blame each other for being found, with one very vocal creature appearing to be furious that Earthlings may now attempt to travel to the new planet. ‘Why did you have to have the telly on so fucking loud?’, they say”.

Click through to the article. Sounds like they really don’t care to have anything to do with Earth cultures. Hmmm.

Thanks, UrsaRodinia

Just HOW EARLY is spring arriving in your neighborhood?


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❝ How do you know when spring has begun? Is it the appearance of the first tiny leaves on the trees, or the first crocus plants peeping through the snow? The Spring Leaf Index is a measure of these early season events in plants, based on recent temperature conditions. This model allows us to track the progression of spring onset across the country. The map shows locations that have reached the requirements for the Spring Leaf Index model (based on NOAA National Centers for Environmental Prediction Real-Time Mesoscale Analysis temperature products).

Click through to the article and a dynamic model of this map.

Earth three-peats hottest year record

❝ Earth sizzled to a third-straight record hot year in 2016, with scientists mostly blaming man-made global warming with help from a natural El Nino that’s now gone.

Two U.S. agencies and international weather groups reported Wednesday that last year was the warmest on record. They measure global temperatures in slightly different ways, and came up with a range of increases, from minuscule to what top American climate scientists described as substantial.

They’re “all singing the same song even if they are hitting different notes along the way. The pattern is very clear,” said Deke Arndt of the National Oceanic and Atmospheric Administration…

“This is clearly a record,” said Gavin Schmidt, director of NASA’s Goddard Institute of Space Studies. “We are now no longer only looking at something that only scientists can see, but is apparent to people in our daily lives.”

❝ Temperature records go back to 1880. This is the fifth time in a dozen years that the globe has set a new annual heat record. Records have been set in 2016, 2015, 2014, 2010 and 2005…

Schmidt said his calculations show most of the record heat was from heat-trapping gases from the burning of oil, coal and gas. Only about 12 percent was due to El Nino, which is a periodic warming of parts of the Pacific that change weather globally, he said. Arndt put the El Nino factor closer to a quarter or a third…

❝ The effects are more than just records, but actually hurt people and the environment, said Oklahoma University meteorology professor Jason Furtado. They’re “harmful on several levels, including human welfare, ecology, economics, and even geopolitics,” he said.

I’ll second that emotion.

Move the date back on the first humans in North America — another 10,000 years!


Click to enlargeBourgeon et al

❝ The timing of the first entry of humans into North America across the Bering Strait has now been set back 10,000 years.

This has been demonstrated beyond a shadow of a doubt by Ariane Burke, a professor in Université de Montréal’s Department of Anthropology, and her doctoral student Lauriane Bourgeon, with the contribution of Dr. Thomas Higham, Deputy Director of Oxford University’s Radiocarbon Accelerator Unit.

Their findings were published in early January in the open-access journal PLoS One.

❝ The earliest settlement date of North America, until now estimated at 14,000 years Before Present (BP) according to the earliest dated archaeological sites, is now estimated at 24,000 BP, at the height of the last ice age or Last Glacial Maximum.

❝ The researchers made their discovery using artifacts from the Bluefish Caves, located on the banks of the Bluefish River in northern Yukon near the Alaska border. The site was excavated by archaeologist Jacques Cinq-Mars between 1977 and 1987. Based on radiocarbon dating of animal bones, the researcher made the bold hypothesis that human settlement in the region dated as far back as 30,000 BP…

To set the record straight, Bourgeon examined the approximate 36,000 bone fragments culled from the site and preserved at the Canadian Museum of History in Gatineau — an enormous undertaking that took her two years to complete. Comprehensive analysis of certain pieces at UdeM’s Ecomorphology and Paleoanthropology Laboratory revealed undeniable traces of human activity in 15 bones. Around 20 other fragments also showed probable traces of the same type of activity.

“Series of straight, V-shaped lines on the surface of the bones were made by stone tools used to skin animals,” said Burke. “These are indisputable cut-marks created by humans.”

❝ Bourgeon submitted the bones to further radiocarbon dating. The oldest fragment, a horse mandible showing the marks of a stone tool apparently used to remove the tongue, was radiocarbon-dated at 19,650 years, which is equivalent to between 23,000 and 24,000 cal BP (calibrated years Before Present).

“Our discovery confirms previous analyses and demonstrates that this is the earliest known site of human settlement in Canada,” said Burke. It shows that Eastern Beringia was inhabited during the last ice age.”…

The Beringians of Bluefish Caves were therefore among the ancestors of people who, at the end of the last ice age, colonized the entire continent along the coast to South America.

Bravo. If I was a young ‘un, again – this would be high on the list of work I’d love to be doing.