Tag Archives: Northern Hemisphere

The Biggest Ecological Disaster the World Has Ever Forgotten

By Alex Planes, The Motley Fool

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On this day in economic and business history…

Three great columns of flame rose in the sky over Mount Tambora on April 10, 1815. The long-dormant Indonesian volcano had rumbled to life five days earlier with a thunderous detonation followed by ashfall, a warning to the world. On April 10, the mountain became liquid fire. A monstrous ejection of ash climbed nearly 27 miles into the stratosphere as the volcano’s explosive shockwave ripped across the globe. Darkness fell for hundreds of miles as ash spread across the sky, blocking sunlight and suffocating crops. When it was over, more than 36 cubic miles of material had blown into the atmosphere, the 14,000-foot peak had been cut more than 4,000 feet shorter — and the world was about to experience its last great subsistence crisis before entering a period of explosive population growth.

The Mount Tambora eruption was the largest in recorded history, with roughly four times the energy and 100 times the volume of ejected material as the more famous Krakatoa eruption later in the 19th century. At least 70,000 people died as a direct result of the explosion and its subsequent ashfall. More notably, Tambora was a significant contributing factor to what became known as “The Year Without a Summer” in 1816. That year, global average temperatures dropped by roughly one degree Fahrenheit, with regional drops of five degrees or more recorded in much of the Northern Hemisphere. Snow and ice blanketed temperate areas well into the summer, and wide swaths of cropland failed across Europe and North America, causing shortages and highly inflated prices of most staple crops and thus the worst famine of the 19th century. Hundreds of thousands of Europeans died of starvation and disease brought on by the changed climate.

The Year Without a Summer also had an impact on political and economic transitions already underway throughout the Western world. Beyond mass famine and starvation, which helped give rise to the modern administrative style of government, the cold summer purportedly sped up the settling of the American heartland as farmers and workers fled the cold and failed crops. The event also contributed to the development of the earliest bicycles, which would later inspire the development of motor vehicles. The cold, dreary weather may even have inspired Mary Shelley’s Frankenstein, the world’s first example of science fiction.

Mount Tambora rumbled to life again in 2011, prompting Indonesian government warnings and a minor panic in the global media. It hasn’t repeated its 1815 eruption — you’d have heard about it and seen the change in the sky — but the devastated caldera remains under heightened scrutiny, and the world waits.

Sailing toward tragedy
The Titanic set sail from Southampton, England, on her doomed maiden voyage to New York City on April 10, 1912. The massive liner narrowly averted disaster as it left port. The omen was doubly foreboding considering

Source: FULL ARTICLE at DailyFinance

Rising temperature difference between hemispheres could dramatically shift rainfall patterns in tropics

(Phys.org) —One often ignored consequence of global climate change is that the Northern Hemisphere is becoming warmer than the Southern Hemisphere, which could significantly alter tropical precipitation patterns, according to a new study by climatologists from the University of California, Berkeley, and the University of Washington, Seattle. …read more
Source: FULL ARTICLE at Phys.org

‘Lights Over Lapland’ VIDEO Captures Comet Pan-STARRS & Northern Lights

By The Huffington Post News Editors

By: Mike Wall
Published: 03/27/2013 12:05 PM EDT on SPACE.com

The northern lights and a bright comet dance together over the Scandinavian Arctic in a stunning new video.

Astrophotographer Chad Blakley captured the footage of Comet Pan-STARRS blazing amid dazzling green auroras on March 20, during a trip to Abisko National Park in northern Sweden.

“The auroras began as soon as the sun went down and continued to dance all night long,” Blakley told SPACE.com via email in a description of the comet and aurora video. “To say that we had an incredible night would be a huge understatement!”

Comet Pan-STARRS burns just above the horizon in the 80-second video, while the shifting green flames of Sweden‘s northern lights flicker above and around the icy wanderer. [See photos of Comet Pan-STARRS and the Northern Lights]

Blakely is not the only stargazer to catch a dazzling view of Comet Pan-STARRS and the northern lights. Astrophotographer Tommy Eliassen also captured the view from Norway when he photographed the comet on March 19. 

Eliassen’s photo shows the comet hovering over snow-covered mountains as the northern lights glow like a bright ribbon of green light. Eliassen said he captured the sight from Meløy, Nordland, in Norway.

The comet, which is officially known as C/2011 L4 (PANSTARRS), was discovered in June 2011 by astronomers using the Panoramic Survey Telescope and Rapid Response System telescope in Hawaii (hence the name). Researchers think this is Pan-STARRS’ first trip to the inner solar system from the distant, icy Oort Cloud.

Comet Pan-STARRS has been putting on a show in the Northern Hemisphere for much of March, shining just above the western horizon with naked-eye visibility. The comet made its closest approach to the sun on March 10 and is dimming now, but it’s still visible low in the western sky around sunset.

The comet is expected to have dimmed to the point that it is only visible through binoculars or small telescopes by the end of March.

The auroras — also known as the northern lights and southern lights — result when charged particles from the sun collide with molecules high in Earth’s atmosphere, generating a glow. They’re usually restricted to high latitudes because our planet’s magnetic field lines tend to funnel these particles toward the poles.

But powerful solar eruptions known as coronal mass ejections can supercharge the auroras, increasing their intensity and occasionally bringing them into view for people in more temperate climes. After a big CME in 1909, for example, auroras were visible in Singapore, which lies just north of the equator.

Follow Mike Wall on Twitter @michaeldwall. Follow us @SpacedotcomFacebook or Google+. Originally published on SPACE.com.

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Source: FULL ARTICLE at Huffington Post

Natural climate swings contribute more to increased monsoon rainfall than global warming

Natural swings in the climate have significantly intensified Northern Hemisphere monsoon rainfall, showing that these swings must be taken into account for climate predictions in the coming decades. The findings are published in the March 18 online publication of the Proceedings of the National Academy of Sciences. …read more
Source: FULL ARTICLE at Phys.org

Leaf Peeping Season Colors In Tasmania

By The Huffington Post News Editors

For those of us in the Northern Hemisphere, winter is on its way out. But, as we look forward to the spring flowers, bunnies, puppies and all that, our friends south of the equator are wading into autumn. Still, fall is not without its attractions, and chief among them is the opportunity to head out on leaf peeping trips and watch the landscape turn technicolor. The absolute best destination anywhere south of the Mediterranean? Tasmania, Australia‘s Hawaii.

To say that Tasmania is at its best in autumn is to sell the 26,410-square-mile island short. The most temperate part of Australia, Tasmania is coated in thick forests and vineyards that blush as cold air trickles up from Antarctica. The island is also home to the Fagus tree: Instead of talking about foliage, Tasmanian’s refer to the “Turning of the Fagus,” when the small, spiky leaves on this tree turn riotous shades of orange and red.

Were Tasmania’s sole asset its foliage, travelers probably wouldn’t want to make the considerable trek to Hobart. But the small city has an outsized personality and the coast there is an attraction unto itself. The current hot spot is the Museum of Old and New Art, the creation of an eccentric gambling genius and arguably the most buzzed about gallery on Earth. The museum is just down the coast from Seven Mile Beach, which is exactly what it sounds like but with more birds.

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Source: FULL ARTICLE at Huffington Post