Arctic News

Wednesday, April 17, 2019

How long do we have?

The March 2019 temperature is in line with an earlier analysis that 2019 could be 1.85°C warmer than preindustrial and that a rapid temperature rise could take place soon, as illustrated by the image below.

A catastrophe of unimaginable proportions is unfolding. Life is disappearing from Earth and all life could be gone within a decade. At 5°C of warming, most life on Earth will have disappeared. When looking at near-term human extinction, 3°C will likely suffice. Study after study is showing the size of the threat, yet many people seem out to hide what we're facing.

Above image asks 'How long do we have?' The image is created with NASA LOTI data, adjusted 0.78°C to reflect a 1750 baseline, ocean air temperature and higher polar anomaly. Trends are added based on 1880-2019 (purple) and 2000-2019 data (red). The long-term purple trend points at 2025 as the year when 3°C rise from preindustrial could be crossed, while the red trend that focuses on short-term events shows how a 3°C rise from preindustrial could be reached as early as in 2020.

The chart below shows elements contributing to the warming, adding up to a rise of as much as 18°C by 2026.

[ from an earlier post ]

The situation is dire and calls for comprehensive and effective action, as described at the Climate Plan.

Links

• Co-extinctions annihilate planetary life during extreme environmental change, by Giovanni Strona and Corey Bradshaw (2018)
https://www.nature.com/articles/s41598-018-35068-1

• How much warming have humans caused?
https://arctic-news.blogspot.com/2016/05/how-much-warming-have-humans-caused.html

• Extinction
https://arctic-news.blogspot.com/p/extinction.html

• A rise of 18°C or 32.4°F by 2026?
https://arctic-news.blogspot.com/2019/02/a-rise-of-18c-or-324f-by-2026.html

• Stronerg Extinction Alert
https://arctic-news.blogspot.com/2019/03/stronger-extinction-alert.html

• Climate Plan
https://arctic-news.blogspot.com/p/climateplan.html

Sunday, April 14, 2019

As Winds Start To Growl

Late last month, wind patterns over the North Pacific and North America resembled a screaming face.

The Arctic was as much as 7.7°C or 13.86°F warmer than 1979-2000, while in parts of Alaska the temperature anomaly was at the top end of the scale, i.e. 30°C or 54°F above 1979-2000.

On April 14, 2019, wind patterns over the North Atlantic resembled a growling face, as highlighted by the red ellipse on the image.

Temperatures over Greenland were as high as 14.9°C or 58.7°F at 1000 hPa at the spot marked by the green circle.

On the left, the image shows winds at 250 hPa dipping over the U.S., enabling cold winds to descend deep down over North America.

Temperatures in Colorado that day were as low as -13.5°C or 7.6°F, as illustrated by above image.

The map below shows the jet streams stretched out from North Pole to South Pole, while the jet stream is also crossing the Equator over the Pacific Ocean.

Meanwhile, Arctic sea ice extent remains at a record low for the measurements at ads.nipr.ac.jp for the time of year. As the image below shows, Arctic sea ice extent was 12.9 million km² on April 14, 2019.

The situation is dire and calls for comprehensive and effective action, as described at the Climate Plan.

Links

• An infinite scream passing through nature
https://arctic-news.blogspot.com/2019/04/an-infinite-scream-passing-through-nature.html

• Arctic Warming Up Fast
https://arctic-news.blogspot.com/2019/03/arctic-warming-up-fast.html

• Climate Plan
https://arctic-news.blogspot.com/p/climateplan.html

Monday, April 8, 2019

Blue Ocean Event Consequences

A Blue Ocean Event looks set to occur in the Arctic when there will be virtually no sea ice left. At first, the duration of this event will be a few weeks in September, but as more heat accumulates in the Arctic, the event will last longer each year thereafter.

Indeed, a Blue Ocean Event will come with accumulation of more heat, due to loss of latent heat, as a dark (blue) ocean absorbs more sunlight than the reflective ice, etc. Consequences will extend far beyond the Arctic, as shown on the image below that features Dave Borlace's Blue Ocean Top Ten Consequences.

Dave Borlace goes into more detail regarding these consequences in the video Blue Ocean Event : Game Over?

A Blue Ocean Event could happen as early as September 2019. The image below shows that Arctic sea ice extent on April 7, 2019, was 12.97 million km², a record low for measurements at ads.nipr.ac.jp for the time of year. By comparison, on May 28, 1985, extent was larger (13.05 million km²) while it was 51 days later in the year.

In the video below, Paul Beckwith also discusses the rapid decline of the sea ice and the consequences.

Clearly, the rapid decline of the sea ice has grave consequences. When also looking beyond what's happening in the Arctic, there are further events, tipping points and feedbacks that make things worse. An earlier post contains the following rapid warming scenario:

a stronger-than-expected El Niño would contribute to
early demise of the Arctic sea ice, i.e. latent heat tipping point +
associated loss of sea ice albedo,
destabilization of seafloor methane hydrates, causing eruption of vast amounts of methane that further speed up Arctic warming and cause
terrestrial permafrost to melt as well, resulting in even more emissions,
while the Jet Stream gets even more deformed, resulting in more extreme weather events
causing forest fires, at first in Siberia and Canada and
eventually also in the peat fields and tropical rain forests of the Amazon, in Africa and South-east Asia, resulting in
rapid melting on the Himalayas, temporarily causing huge flooding,
followed by drought, famine, heat waves and mass starvation, and
collapse of the Greenland Ice Sheet.

Importantly, depicted above is only one scenario out of many. Things may eventuate in different order and occur simultaneously, i.e. instead of one domino tipping over the next one sequentially, many events reinforcing each other. Further points should be added to the list, such as falling away of sulfate cooling due to economic changes, ocean stratification and stronger storms that can push large amounts of warm salty water into the Arctic Ocean.

Global sea ice extent is also at a record low for the time of year. Global sea ice extent on April 8, 2019, was 17.9 million km². On April 8, 1982, global sea ice extent was 22.32 million km², i.e. a difference of 4.42 million km². That constitutes a huge albedo loss.

As discussed in an earlier post, this all adds up to further global warming that may eventuate very rapidly. The image below shows how a total rise of 18°C or 32.4°F from preindustrial could eventuate by 2026.

Monday, April 1, 2019

An infinite scream passing through nature

Wind patterns on March 30, 2019, resembled what Edvard Munch wrote in his diary in 1892, i.e. "I sensed an infinite scream passing through nature", a feeling Munch expressed in his iconic artwork The Scream, part of which is added on the right in above image.

Indeed, at the end of March 2019, it felt like an infinite scream passing through nature! On March 31, 2019, 12:00 UTC, the Arctic was 7.7°C or 13.86°F warmer than 1979-2000, as above image shows, while in parts of Alaska the anomaly was at the top end of the scale, i.e. 30°C or 54°F above 1979-2000, as discussed in an earlier post.

What caused this to eventuate? Firstly, as the Arctic is warming faster than the rest of the world, the temperature difference between the North Pole and the Equator is narrowing, which is slowing down the overall speed at which the jet stream is circumnavigating Earth, while it also is making the jet stream wavier, enabling warm air from the Atlantic Ocean and Pacific Ocean to more easily enter the Arctic, while also enabling cold air from the Arctic to more easily descend over Asia and North America.

At the same time, global warming is making oceans warmer. Sea surface temperatures were high in the path of the jet stream on March 15, 2019, as above image shows. The sea surface was 10.8°C or 19.4°F warmer than 1981-2011 at the green circle in the left panel of above image. On that day, surface air temperature there was as high as 7.9°C or 46.2°F, and there were cyclonic wind patterns, as the right panel of above image shows.

High sea surface temperatures are causing winds over oceans to get much stronger than they used to be at this time of year.

The image on the right shows that, on March 15, 2019, the jet stream reached speeds as high as 386 km/h or 240 mph at the green circle. These stronger winds then collide at high speed with the air in front of them. This collision occurs with an even greater force, due to low temperatures over North America and due to the lower overall speed at which the jet stream circumnavigates Earth. All this makes that air gets strongly pushed aside toward the Arctic and the Equator.

On March 30, 2019, strong winds pushed warm air into Bering Strait, resulting in temperatures as high as 2.5°C or 36.4°F, as the image below illustrates.

On March 30, 2019, Arctic sea ice extent fell to a record low for the time of year, as discussed in an earlier post. Ominously, methane reached peak levels as high as 2,967 ppb on March 29, 2019, as the image below shows.

With Arctic sea ice extent this low and with temperatures rising relentlessly, fears are that the sea ice won't be able to act as a buffer to absorb heat for long, and that a strong influx of warm, salty water will reach the seafloor of the Arctic Ocean and trigger methane eruptions from destabilizing hydrates.

The situation is dire and calls for comprehensive and effective action, as described at the Climate Plan.

Links

• Arctic Warming Up Fast
https://arctic-news.blogspot.com/2019/03/arctic-warming-up-fast.html

• Climate Plan
https://arctic-news.blogspot.com/p/climateplan.html