Arctic change has widespread impacts

Arctic change has widespread impacts
Light reflects off Arctic sea ice. Credit: NASA

As the Arctic warms faster than the rest of the globe, permafrost, land ice and sea ice are disappearing at unprecedented rates. And these changes not only affect the infrastructure, economies and cultures of the Arctic, they have significant impacts elsewhere as well—according to a commentary in Earth's Future, led by research scientist Twila Moon of the National Snow and Ice Data Center (NSIDC) at the University of Colorado Boulder.

"To many, the Arctic seems like a distant universe—one that could never impact their lives," said Moon. "But the reality is, changes in the Arctic are increasingly affecting the rest of the world, causing amplified climate change, sea level , and more devastating storms."

Sea Level Rise

The melting of has contributed to 60 percent of sea level rise since 1972. Arctic land ice comprises over two million square acres, and studies have confirmed this area is diminishing rapidly due to . In addition, most land ice in this region is thinning. If current warming trajectories are maintained, Arctic land ice is expected to be a major contributor to projected global sea level rise, contributing up to one meter this century. Three out of four of the U.S.'s largest cities—New York, Los Angeles and Houston—are coastal and 39 percent of the U.S. population lives in shoreline counties. As sea levels continue to rise, around the U.S. and world will be increasingly forced to deal with the impacts, including flooding, freshwater contamination, , higher storm surges and more.

Extreme Weather Events

In addition to the increased storm surges and flood events caused by , a current hypothesis states that changes in the Arctic jet stream may be significantly affecting storms and , including snow storms and droughts, in the continental U.S. as well as Canada, Europe and Asia. For example, Arctic warming has been linked to a recent extreme drought in California.

Infrastructure Damage

Under the "business as usual" emission scenario, the Intergovernmental Panel on Climate Change RCP8.5 estimates that Alaska will face $5.5 billion dollars in infrastructure damage between 2015 and 2099. Almost half of this will be directly due to permafrost thaw. In addition, this permafrost thaw will release significant amounts of carbon dioxide and methane into the atmosphere, contributing to further warming of the planet.

Coastal Erosion and Arctic Amplification

Sea ice extent and sea ice thickness have both declined in the past several decades. This sea ice loss has caused dramatic coastal erosion in Siberia and Alaska, and has serious global consequences as sea ice helps to regulate Earth's climate by reflecting incoming solar radiation. As sea ice cover declines, Arctic warming is amplified due to these decreases in surface reflectivity.

Looking Forward

"As the Arctic continues to warm faster than the rest of the globe, we'll continue to see impacts worldwide, including in tropical and temperate countries with big cities, large economies, and lots of infrastructure," said Moon. "If we want to safeguard our people and society, we need to act now to both reduce emissions to curb warming and to prepare for the inevitable changes already set in motion."


Explore further

Exploring permafrost coastal erosion in the Arctic

More information: Twila A. Moon et al. The expanding footprint of rapid Arctic change, Earth's Future (2019). DOI: 10.1029/2018EF001088
Citation: Arctic change has widespread impacts (2019, March 8) retrieved 26 May 2019 from https://phys.org/news/2019-03-arctic-widespread-impacts.html
This document is subject to copyright. Apart from any fair dealing for the purpose of private study or research, no part may be reproduced without the written permission. The content is provided for information purposes only.
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Mar 08, 2019
More of the world becoming more habitable. Just like it was for hundreds of millions of years.

Mar 08, 2019
This place is full of cranks and idiots.


Mar 08, 2019
https://dailycaller.com/2019/03/06/michaels-climate-obama/


See what I mean?

Mar 08, 2019
@grandpa.
More of the world becoming more habitable. Just like it was for hundreds of millions of years.
...meanwhile most of the rest of the world will become increasingly UN-inhabitable. And with the double-whammy of increased costs/damage to infrastructure/agriculture/health etc as the melting destroys current road/rail/building/runways etc currently stabilised by the permafrost which will melt and require enormous and scarce money/resources to re-do on 'mush' ground. And the other side of the changing climate will see more extreme/frequent/widespread etc AGW-exacerbated weather/climate events everywhere; which will become increasingly 'unrecoverable from' before the next one hits (already happening in many regions/countries in the world NOW).

So be careful what you wish for, @grandpa. because you just might get it! Then your @grandKIDS will curse YOU for wishing such unnecessary catastrophe upon THEM; which could have been avoided by timely climate action NOW.

Mar 08, 2019
So her is the first sentence of philstacy's linked article from the Daily Caller -
Does anyone seriously think that a global change in temperature of less than one degree Celsius threatens national security?
I guess Phil has not heard about the reports coming out of the U.S. military - that assert exactly that - https://unfccc.in...pentagon

Maybe you could get a copy of 'Google for Dummies" phil.

Mar 08, 2019
I guess Phil has not heard about the reports coming out of the U.S. military - that assert exactly that - https://unfccc.in...pentagon
Maybe you could get a copy of 'Google for Dummies" phil.

My google for dummies is failing me in finding a paper titled, "Global Climate Change Implications for the United States," released in 1990 by the Naval War College. It's supposed to be the first DoD document on CC that was published, if you ever run across it. Unfortunately I can't find it at DTIC, either.

Mar 08, 2019
AC,
Is this what you're looking for?

Mar 08, 2019
Sorry, clicked to soon: http://documents....navy.pdf

Mar 08, 2019
By the way, the link came from here: https://climatean...-change/

Mar 08, 2019
Sorry, clicked to soon: http://documents....navy.pdf

Thanks! I had actually seen that before but dismissed it because of that abovetopsecret looking logo on the front page. That FOIA group should really choose a better logo.

Mar 08, 2019
If only we had Global Cooling, what a wonderful future we'd have.

Mar 09, 2019
"If only we had Global Cooling" - tblakely

Because by Conservative non-logic, if something is bad, then it's opposite must be good.

For example Drinking excess water is bad. Hence dehydration must be good.


Mar 09, 2019
@grandpa.
More of the world becoming more habitable. Just like it was for hundreds of millions of years.
...meanwhile most of the rest of the world will become increasingly UN-inhabitable. .
The world was plenty habitable when carbon dioxide levels were even 10 times higher than current levels. I'm suggesting that the solution is in the works. People are inventing alternatives to oil that are cheaper and the market will solve this problem. Meanwhile a three degree C temperature rise will get us out of the wild swings the ice ages caused over the last million to two million years. They were catastrophic for life.

Mar 09, 2019
@grandpa.
More of the world becoming more habitable. Just like it was for hundreds of millions of years.
...meanwhile most of the rest of the world will become increasingly UN-inhabitable.
The world was plenty habitable when carbon dioxide levels were even 10 times higher than current levels.
Habitable by whom? Dinosaurs and other non-human life forms? :)
I'm suggesting that the solution is in the works. People are inventing alternatives to oil that are cheaper and the market will solve this problem.
The most sensible and clean and sustainable solution is clear: more 'green' (eg, wind and solar) renewables to minimise reliance on dirty and increasingly costly/problematic coal-fired power plants. Use of pumped-water/electric battery systems for backup/stability; and gas/biofuel where needed.
Meanwhile a three degree C temperature rise will get us out of the wild swings the ice ages caused...
AGW-exacerbated disasters are already happening NOW.

Mar 09, 2019
@grandpa.
More of the world becoming more habitable. Just like it was for hundreds of millions of years.
...meanwhile most of the rest of the world will become increasingly UN-inhabitable.
The world was plenty habitable when carbon dioxide levels were even 10 times higher than current levels.
Habitable by whom? Dinosaurs and other non-human life forms? :)
I'm suggesting that the solution is in the works. People are inventing alternatives to oil that are cheaper and the market will solve this problem.
The most sensible and clean and sustainable solution is clear: more 'green' (eg, wind and solar). You want government to provide the solution. This is way too big a problem than government can solve. The free market will change the situation. Already developed countries are using less power and producing less carbon dioxide. Ice ages, were, by far a worse problem. All of Canada and parts of the US, northern Europe covered in a mile of ice.

Mar 09, 2019
@grandpa.
The most sensible and clean and sustainable solution is clear: more 'green' (eg, wind and solar) renewables to minimise reliance on dirty and increasingly costly/problematic coal-fired power plants. Use of pumped-water/electric battery systems for backup/stability; and gas/biofuel where needed.
You want government to provide the solution.
Did I say that? No. But govts can enable smoother transition, instead of 'protecting' fossil/nuclear lobby's profits/polluting and sabotaging renewables/market forces/action. This sabotaging has been evident for last two decades here in OZ; with the Conservative Liberal-National govt blatantly pushing the coal 'protection' agenda, and deliberately creating market uncertainty that has prevented/slowed 'market' investment in the renewables sector which would have been providing more jobs than the fossil industry by now, and be cheaper, safer and more sustainable as well as enhancing national security/self-sufficiency. :)


Mar 10, 2019
This place is full of cranks and idiots.


Castrogiovanni, are you starting with yourself?

Mar 10, 2019
There is so precious little real science in the numbers presented in this article. It reads like a marketing scam.

The melting of land ice has contributed to 60 percent of sea level rise since 1972.

60% of almost 0 is also about 0. This is meaningless, unless you define what the actual rise was.

3 out of 4 of the U.S.'s largest cities are coastal and 39 percent of the U.S. population lives in shoreline counties.

So then what? This statistic is meaningless, unless you give something like "x thousand people live in areas that are less then 1 meter above sea level..."

No other numbers given. Just marketing hype.

I doubt any scientist wrote this article.


Mar 10, 2019
This is all about one world government and this plays right into the ego of scientists who are super brilliant, who believe they are smart enough to make decisions for everyone. The truth is that managing the world is impossible. Nature has a gazillion species that all compete and that keeps a balance. There is no one world government to keep it secure. The world of humans may fall apart, somebody may start nuclear war, or, more likely, someone will use biological warfare to destroy food supply and make a pestilence at the same time to end this current civilization. This is how much some people hate humanity. Global climate change is about a million times less a threat than rogue microbiologists who might hate humanity.

Mar 10, 2019
Lets appeal to authority , from some french mathematicans so u know they r stupid

file:///C:/Users/user/Downloads/French%20Society%20of%20Mathematics.pdf

if the IPPC's work were to be submitted for publication
in a reputable scientific journal, would it be accepted? This decision is the task of a referee,
in a procedure that is common practice in the sciences.
The answer is very simple: no sensible, high-quality journal would publish the IPPC's work.
The IPPC's conclusions go against observed facts; the figures used are deliberately chosen
to support its conclusions (with no regard for the most basic scientific honesty)

Mar 10, 2019
Stumpy gotta hate WUWT , but who ya gonna believe ? its all in the plots

https://wattsupwi...PBHqWxHI

Mar 10, 2019
Deniers are stuck in the ignorance of last century.

Mar 10, 2019
@Bart_A.
From article:
The melting of land ice has contributed to 60 percent of sea level rise since 1972.
60% of almost 0 is also about 0. This is meaningless, unless you define what the actual rise was.
It's the NON-zero rise TREND that is the salient point. And as AGW-exacerbated rate of melting increases, so will the trend/rate of sea level rise escalate. Keep your eye on the objective reality 'ball', and leave the political propaganda/bias on the 'sidelines'.
From article:
3 out of 4 of the U.S.'s largest cities are coastal and 39 percent of the U.S. population lives in shoreline counties.
This statistic is meaningless, unless you give something like "x thousand people live in areas that are less then 1 meter above sea level..."
It should already be understood that any coastal city is vulnerable to sea level rise, because transport, utilities and harbour/waterfront infrastructure is usually built at or near sea level. Focus objectively. :)

Mar 10, 2019
@grandpa.
This is all about one world government and this plays right into the ego of scientists who are super brilliant, who believe they are smart enough to make decisions for everyone.
It's the science/reality itself, not the messengers, that should be the focus. Leave your personal/political agendas out of it...if only for the sake of YOUR @grandKIDS.
The truth is that managing the world is impossible. Nature has a gazillion species that all compete and that keeps a balance. There is no one world government to keep it secure. The world of humans may fall apart, somebody may start nuclear war, or, more likely, someone will use biological warfare to destroy food supply and make a pestilence at the same time to end this current civilization. This is how much some people hate humanity. Global climate change is about a million times less a threat than rogue microbiologists who might hate humanity.
So, what's new? Increasing AGW will only EXACERBATE ALL THAT.

Mar 10, 2019
https://www.ameri...ate.html
says philstacy
A very timely article. Thank you.
"Climategate refers to the leakage of emails among what may be termed alarmist conspirators, mostly Anglos in the U.K. and the USA. They contrived and managed to suppress the circulation of any papers or data expressing opinions, contrary to the theme that CO2 is the "villain" that causes climate disasters.

They formed a network, traced by highly regarded GMU statistics professor Edward Wegman, that "peer-reviewed" each other's papers and tried to prevent publication of contrary views by pressuring independent editors and by raising objections whenever possible."

Mar 10, 2019
It's the science/reality itself, not the messengers, that should be the focus. Leave your personal/political agendas out of it...if only for the sake of YOUR @grandKIDS.

Global climate change is all about one world government. Its so obvious that certain groups of people want to push for one world government that is was talked about in the book of revelation almost 2000 years ago. The uniting of countries in the book of Daniel 2500 years ago. This desire to say the sky is falling to scare people into giving up freedom will always happen.

Mar 10, 2019
It's the science/reality itself, not the messengers, that should be the focus. Leave your personal/political agendas...if only for the sake of YOUR @grandKIDS.

Global climate change is all about one world government. Its so obvious that certain groups of people want to push for one world government that is was talked about in the book of revelation almost 2000 years ago. The uniting of countries in the book of Daniel 2500 years ago. This desire to say the sky is falling to scare people into giving up freedom will always happen.

says grandpa

There are certain things that have been foretold that must happen even if we are not happy with that future. The Book of Revelations got it right and humans cannot change it. Look at what human civilisation has become. The good are being overwhelmed by the practitioners of evil who are becoming more powerful and unabashed as to their plans for humanity and the Earth. Humans are willingly doing it to themselves.

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