domingo, 28 de junho de 2020

Siberian Forest Fires Increase Fivefold in Week Since Record High Temperature / Heatwave in Siberia, with 38 degrees, raises concerns about changing climate / Arctic records its hottest temperature ever / VIDEO: Massive Saharan dust cloud makes its way to Southern states



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Siberian Forest Fires Increase Fivefold in Week Since Record High Temperature

 Common Dreams Jun. 28, 2020 01:22PM EST
By Eoin Higgins

The number of fires in the vast north Asian region of Siberia increased fivefold this week, according to the Russian forest fire aerial protection service, as temperatures in the Arctic continued higher than normal in the latest sign of the ongoing climate crisis.

The news of the increase comes a week after the small Siberian town of Verkhoyansk reported a high temperature of 100.4° F on June 20, a reading that, if confirmed, would mark the hottest day ever recorded in the region.

"While fires are common at this time of year, record temperatures and strong winds are making the situation particularly worrying," the European Union's Earth Observation Programme, which is monitoring the situation, said in a statement.

As the Associated Press reported:

According to figures reported Saturday by Avialesookhrana, Russia's agency for aerial forest fire management, 1.15 million hectares (2.85 million acres) were burning in Siberia in areas that cannot be reached by firefighters.
The worst-hit area is the Sakha Republic, where Verkhoyansk is located, with 929,000 hectares (2.295 million acres) burning.
The Sakha Republic's fire service reported 127 natural fires in the Russian federal sector.

The fires and heat are due to the climate crisis, Weather Channel meteorologist Carl Parker told Newsweek.

"What climate change is doing is moving the distribution of weather events, such that historically low-frequency, extreme events occur more frequently," said Parker. "Had the climate not changed due to man-made greenhouse gases, the heat we've seen in parts of Siberia would have been a 100,000-year event."

Parker warned that the fires are part of a dangerous feedback loop in the northern region.

"What's scary about the warming in Siberia is that there are huge quantities of carbon in permafrost, which can be unleashed during periods like this, particularly as fires develop in the region," said Parker.

Jonathan Overpeck, University of Michigan environmental school dean, told AP in an email on June 24 that the situation in the Arctic region is unprecedented.

"The Arctic is figuratively and literally on fire," wrote Overpeck. "It's warming much faster than we thought it would in response to rising levels of carbon dioxide and other greenhouse gases in the atmosphere, and this warming is leading to a rapid meltdown and increase in wildfires."

"The record warming in Siberia is a warning sign of major proportions," he added.

Temperatures in Siberia for the first five months of 2020 were an average 14° F over normal.

"That's much, much warmer than it's ever been over that region in that period of time," Zeke Hausfather, a Berkeley Earth climate scientist, told AP.


Meltwater near the Arctic city of Norilsk. Last month, an oil spill occurred at Norilsk due to the thawing of permafrost causing pipes to collapse. The city, which processes nickel and other minerals, is the largest air polluter in Russia, emitting twice as much as London. Kirill Kukhmar/TASS Photo

Heatwave in Siberia, with 38 degrees, raises concerns about changing climate

Siberia experiences tropical temperatures: last weekend the mercury would have risen to 38 degrees Celsius. A record for this part of the world, and according to climatologists an indication that global warming is becoming increasingly worrisome.

Ben van Raaij 24 June 2020, 17:19

The record temperature of 38 degrees Celsius was reportedly measured on 21 June in Verchojansk  in the Autonomous Republic of  Sakha  (Yakutsia). The World Meteorological  Organization  (WMO) in Geneva announced on Tuesday that it will check the media reports with the Russian Federal Meteorological Service. The WMO calls the messages worrisome, but in line with well-known trends.

The part of Siberia that lies above the Arctic Circle has been experiencing a heat wave for weeks. The spring there was very warm, with temperatures up to 8 degrees above normal, causing the snow cover on the bottom and the ice on the rivers to melt prematurely. Also last winter was warmer than normal.

Siberia has an extreme land climate that has traditionally been featured in the Guinness Book of World Records. The temperature can range from minus 68 degrees Celsius in winter to values above 30 degrees Celsius in summer. But 38 degrees is exceptional, according to the WMO. According to local media, the temperature on the ground would have peaked at 45 degrees.

The current heat record (if confirmed) is a new indication of global warming, which is twice as fast in Arctic areas as elsewhere. This is worrying, because the warming can cause the permanently frozen subsurface (permafrost) to thaw. This can release methane on a large scale, a greenhouse gas 38 times as powerful as CO2. It can greatly accelerate existing warming.

Subsidence
The thawing of the permafrost also leads to subsidence of houses, roads and oil pipelines. An oil spill last month near the Arctic city of Norilsk, in which 20,000 tons of oil spilled into rivers, was partly due to thawing permafrost. In 2011, an apartment complex in Yakutsk, the largest city of  Sakha  (Yakutia), collapsed due to the unstable subsoil.


An additional problem of warming is the forest fires, which are also becoming more common and increasing in siberia. Last year, more than four million hectares of forest were lost, according to Greenpeace Russia. The first wildfires broke out in the spring this year. Normally, the forest fire season in Siberia does not begin until the course of July.




Arctic records its hottest temperature ever

BY JEFF BERARDELLI
UPDATED ON: JUNE 23, 2020 / 8:47 PM / CBS NEWS

Alarming heat scorched Siberia on Saturday as the small town of Verkhoyansk (67.5°N latitude) reached 100.4 degrees Fahrenheit, 32 degrees above the normal high temperature. If verified, this is likely the hottest temperature ever recorded in Siberia and also the hottest temperature ever recorded north of the Arctic Circle, which begins at 66.5°N.

The town is 3,000 miles east of Moscow and further north than even Fairbanks, Alaska. On Friday, the city of Caribou, Maine, tied an all-time record at 96 degrees Fahrenheit and was once again well into the 90s on Saturday. To put this into perspective, the city of Miami, Florida, has only reached 100 degrees one time since the city began keeping temperature records in 1896.

Verkhoyansk is typically one of the coldest spots on Earth. This past November, the area reached nearly 60 degrees Fahrenheit below zero, one of the first spots to drop that low in the winter of 2019-2020. The scene below is certainly more characteristic of eastern Siberia.

Reaching 100 degrees in or near the Arctic is almost unheard of. Although the reading is questionable, back in 1915 the town of Fort Yukon, Alaska, not quite as far north as Verkhoyansk, is reported to have reached near 100 degrees. And in 2010 a town a few miles south of the Arctic circle in Russia reached 100.

As a result of the hot-dry conditions right now, numerous fires rage nearby, and smoke is visible for thousands of miles on satellite images.

This heat is not an isolated occurrence. Parts of Siberia have been sizzling for weeks and running remarkably above normal since January. May featured astonishing warmth in western Siberia, where some locales were 18 degrees Fahrenheit above normal, not just for a day, but for the month. As a whole, western Siberia averaged 10 degrees above normal for May, obliterating anything previously experienced.

On May 23, the Siberian town of Khatanga, far north of the Arctic Circle, hit 78 degrees Fahrenheit. This was 46 degrees above normal and shattered the previous record by a virtually unheard-of 22 degrees. On June 9, Nizhnyaya Pesha, an area 900 miles northeast of Moscow, near the Arctic Ocean's Barents Sea, hit a sweltering 86 degrees Fahrenheit, a staggering 30 degrees above normal.

What's perhaps even more impressive is that this relative warmth has persisted since December, with average temperatures in western Siberia 10 degrees Fahrenheit above normal — doubling the previous departure from average in 2016.

The average heat across Russia from January to May is so remarkable that it matches what's projected to be normal by the year 2100 if current trends in heat-trapping carbon emissions continue. In the image below, the data point for 2020 is almost off the charts, and matches what climate models expect to be typical many decades from now.

The extreme events of recent years are due to a combination of natural weather patterns and human-caused climate change. The weather pattern giving rise to this heat wave is an incredibly stubborn ridge of high pressure; a dome of heat which extends vertically upward through the atmosphere. The sweltering heat is forecast to remain in place for at least the next week, catapulting temperatures easily into the 90s in eastern Siberia.

But this heat wave can not be viewed as an isolated weather pattern. Last summer, the town of Markusvinsa, a village in northern Sweden on the southern edge of the Arctic Circle, hit 94.6°F. Warming and drying of the landscape is leading to unprecedented Arctic fires, with the summer of 2019 being the worst fire season on record.

Due to heat trapping greenhouse gases that result from the burning of fossil fuels and feedback loops, the Arctic is warming at more than two times the average rate of the globe. This phenomenon is known as Arctic Amplification, which is leading to the decline of sea ice, and in some cases snow cover, due to rapidly warming temperatures.

Over the past four decades, sea ice volume has decreased by 50%. The lack of white ice, and corresponding increase in dark ocean and land areas, means less light is reflected and more is absorbed, creating a feedback loop and heating the area disproportionately.

As the average climate continues to heat up, extremes like the current heat wave will become more frequent and intensify. Scientists say there is only one way to dampen the impact of climate change and that is to stop burning fossil fuels.

Correction: This story has been updated to correct the name of the town that reported a near-100-degree day in 1915 to Fort Yukon, not Prospect Creek.

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