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Are the changes in the Arctic messing with our weather? Analysis

By: Dr. Ricky Rood , 9:20 PM GMT on January 26, 2014

Are the changes in the Arctic messing with our weather? Analysis

In the last blog, I promised an analysis of why I conclude that what is happening in the Arctic makes it to my list of the big-ticket items of the past year.

I want to start with the work of Jennifer Francis and her collaborators. Professor Francis gave an excellent seminar in my department last week, which can be viewed here. This seminar uses as a foundation the paper Francis and Vavrus (2012), Evidence linking Arctic amplification to extreme weather in mid-latitudes. There is a whole set of coherent and convergent evidence that documents the changes in the Arctic. There is an increase in temperature, which is much greater in the Arctic than at lower latitudes and in the tropics (Polar or Arctic amplification). This has led to large changes in Arctic sea ice and springtime snow cover. There has been a lengthening of the growing season and an increase in activity in the northern forests – the greening of the Arctic (200 blogs ago, Getting Ready for Spring 5).

In the past, roughly, 15 years, there has been an observed change in the of the Arctic sea-level atmospheric pressure (see previous blog). The pressure is slightly higher, which leads to a weakening of the stream of air that flows around the North Pole. I wrote a tutorial about this in Wobbles in the Barrier. Also in the past decade there have been a number of researchers, for example, Liu et al. (2012) who in Impact of declining Arctic sea ice on winter snowfall – noted circulation patterns that have “ … some resemblance to the negative phase of the winter Arctic oscillation. However, the atmospheric circulation change linked to the reduction of sea ice shows much broader meridional meanders in midlatitudes and clearly different interannual variability than the classical Arctic oscillation.”

These papers lead to a few questions. Are the changes in the Arctic sea-level pressure a direct consequence of local changes in the Arctic, or are they more closely related to changes in global circulation patterns? Are changes in the Arctic sea-level pressure causing changes in weather in the middle latitudes? Are the differences we have seen in the past 15 years indicative of a climate-change related differences in weather patterns? Is what we have traditionally called the Arctic Oscillation changing?

Trenberth and Fasullo are following the heat of the warming earth, with the primary goal of understanding of how much heat is contributing to warming the Earth’s surface air temperature versus how much is going to heating the ocean and melting ice and snow. Their focus is on approximately the past 15 years. Therefore, they pay attention to known ways that the atmosphere and ocean vary (Some previous tutorials: Still Following the Heat and Ocean, Atmosphere, Ice and Land). Trenberth and Fasullo document the strong influence of the 1997-1998 El Nino. El Nino typically has a large effect on global temperature. The 1997-1998 El Nino was especially large. Trenberth and Fasullo show that the temperature in the atmosphere and oceans still remembers the 1997-1998 El Nino. They also examine the Pacific Decadal Oscillation, which is characterized by sea surface temperature differences being above (or below) average in the north-central Pacific while they are below (or above) in the north and east Pacific near the Aleutian Islands and the Gulf of Alaska. The Pacific Decadal Oscillation has been in a pattern of being cooler than average in the north and east Pacific since the 1997-1998 El Nino. Trenberth and Fasullo document a pattern that spans the globe, and the changes in the Arctic are part of that pattern. Conversely, their analysis would suggest that the global aspects of circulation pattern are too large to be caused by changes in the Arctic – it just takes too much energy.

What might be a scientifically based difference between whether changes in the Arctic are part of a global pattern or caused by the loss of sea ice changing the absorption and reflection of solar energy is to some extent not relevant to the question about weather patterns over the U.S. My experience in scientific controversies of this nature is that there are usually both global and local pieces to the puzzle. Further, changes in the U.S. weather could be directly linked to changes in the Arctic as well as to global patterns. In both the Trenberth and Fasullo and the Francis and Vavrus (2012) analysis there are consequential changes in jet stream pattern which is strongly influential to weather in the U.S. and, in fact, all of the middle latitudes of the Northern Hemisphere.

It’s not surprising that changes in the polar jet stream, the river of air that meanders around the North Pole, would have a profound effect on weather in the U.S. The waves that make up the weather systems of winter storms, for example, draw their energy from the environment that forms the jet stream. The jet stream steers these storms. In classes on dynamical meteorology, students learn that what is going on at the jet stream is often better information for forecasting weather than what is going on at the surface. Though there is a direct link between the jet stream and weather systems, the path of cause and effect in the changes in the Arctic, changes in the jet stream and changes to extreme events in the U.S. is not easy to map.

We have seen observations from Francis and Vavrus and Liu et al. (2012) that suggest large meanders in the jet stream. Both of these papers suggest that the scale of these meanders is unprecedented and does not fit easily into the framework we have used historically to describe the Arctic Oscillation - the primary way we describe correlated variability between the Arctic and the middle latitudes. In addition to the Arctic Oscillation, another characteristic we use to describe mid-latitude weather is blocking. Blocking describes a pattern of atmospheric flow, perhaps a particular configuration of the jet stream. Blocking slows or stops the normal west-to-east movement of storms around the Earth. Here is a nice description of blocking. Blocking is most common with high pressure, and high pressure is associated with the northern meanders of the jet stream. Note, blocking is associated with the meanders in the jet stream, but large meanders do not always mean that our definition of “block” is fulfilled. Blocking patterns are difficult to predict on a case-by-case basis. Blocking patterns are known to be associated with droughts, floods, heat waves and cold snaps. Therefore, when we look to a way that changes in the jet stream might change the weather over the U.S. we logically look a changes in blocking, which will discussed more fully in next blog.


Cold Weather in Denver: Climate Change and Arctic Oscillation (8)

Climate Change and the Arctic Oscillation 2

Climate Change and the Arctic Oscillation 1

Wobbles in the Barriers

Barriers in the Atmosphere


Definitions and Some Background

August Arctic Oscillation presentation

CPC Climate Glossary “The Arctic Oscillation is a pattern in which atmospheric pressure at polar and middle latitudes fluctuates between negative and positive phases.”

The views of the author are his/her own and do not necessarily represent the position of The Weather Company or its parent, IBM.

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Quoting 941. VAbeachhurricanes:
Reading yoboi's paper I am genuinely curious. What is wrong with it statistically?
Is it just plain wrong numbers wise?

What's wrong with it is that it's a flat out lie. This has less to do with statistics, than it has to do with applied scientific measurements of atmospheric gasses.

The fingerprint of humans on the rising CO2 is very clear, and it's 50-100 times that of natural volcanic origin. The evidence is:

(1) Measurements of the CO2 output from both volcanoes and fossil fuel burning show that fossil fuel burning far exceeds that of present-day volcanoes. (Link)

(2) The increase in atmospheric CO2 is proportional to a decrease in atmospheric O2, which shows that the CO2 is being created from combustion. (Link)

(3) The carbon isotope signature of the CO2 shows an increase in 12C, which comes from living organisms. There's NO relevant increase in 13C, which comes from melting rocks (volcanoes), and NO increase in 14C, which comes from recently dead living organisms. Therefore, the carbon in CO2 is coming from once living organisms that have been dead for a very long time… aka fossil fuels. (Link)

I've posted it before, and I'll post it again. Dr. Richard Alley says it best:

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Quoting 919. Birthmark:

"Extry! Extry! Read all about it! Hockeyschtick misreads science paper!"

Dem guys is teh funny!

The Stoat pointed out that Gosselin made the same mistake at Notsotrickyzone:

But if you squint at the paper a bit through %u201Cskeptic%u201D-tinted googles, it looks a bit like it is saying that the models have got it wrong, and that something else is the real effect. And this is what NoTricksZone has tricked itself with: the headline there, %u201CClimate Modelers Flub Again%u2026Albedo Not The Number One Arctic Amplifier After All!%u201D says it all. In the comments I%u2019m patiently trying to explain to them what the paper is really saying. There is some hope %u2013 there%u2019s an update to the post which rather plaintively says the claims made by the authors are based on %u201Cmodel simulations%u201D which you might well have thought was the bleedin%u2019 obvious: %u201CHere we analyse climate model simulations from the Coupled Model Intercomparison Project Phase 5 archive to%u2026%u201D is more than just a hint to the wise; although There%u2019s no light the foolish can see better by.

Speaking of which, WUWT falls into the same error. ...

Coincidence that a bunch of Denalati fools print the same claptrap or is it a consiliense of stupid?

Member Since: December 31, 1969 Posts: Comments:
Has anybody seen this day in weather history? A feb. tropical storm in 1952 hit Florida on this day. Wow,today it would be because of AGW fer sure!
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Reading yoboi's paper I am genuinely curious. What is wrong with it statistically?
Is it just plain wrong numbers wise?
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933 - hmmm, a link to a Faux News item from 2007 with no link to the supposedly peer reviewed paper. Interesting.

935 - hmmm, hmmm, a link to a site that states the greenhouse effect is too minimal to influence climate change, although it does keep earth's temperature within a range suitable for human life. But in all their blathering I only found very few references to published research.

You want to try again, yoboi?
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I see yoboi has ducked the questions about the inane 10% nonsense to post a link to a Fox News article about a throughly refuted seven year old paper.

Why is he still here?
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Quoting 936. FLwolverine:
I'll give my extra years to someone like Astro. I figure that we old guys/gals won't be of much use in the oncoming brave new world.

True dat, but some of us need to hang out to at least 100-110 just to keep cussing well embedded in the language.
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Quoting 931. Patrap:
Not much good against sea level rise, but then he (and I) will be long gone by 2100.

Hang on, some research shows if we 50 plus can hold another 20-25 years, we could go on much longer.

That should rattle some of the "yute's" here

: )
I'll give my extra years to someone like Astro. I figure that we old guys/gals won't be of much use in the oncoming brave new world.
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The High Arctic running the last week temps were anomalously 7C above Avg.

Phunny Dat, eh ?

Seems the "Cooling" has not arrived this Winter.

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Quoting 929. Birthmark:

What math would that be? You've been asked this frequently...still waiting for a substantive reply from you.

Why you "10%" claim isn't deleted as trolling at this point is a bit of a mystery.
Oh, because we need to hear both sides of the debate............

You know ...... If we can change just one mind .......

Fat chance!
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Not much good against sea level rise, but then he (and I) will be long gone by 2100.

Hang on, some research shows if we 50 plus can hold another 20-25 years, we could go on much longer.

That should rattle some of the "yute's" here


: )
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Quoting 927. Neapolitan:
Show your math. Cite your sources. Or drop this line of nonsense...
I can't even remember all the things yoboi has promised or threatened to disclose that have (of course) never been revealed. Although wasn't there something about a bombshell????.?.?
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Quoting 910. JohnLonergan:
England in 2100
I'm surprised that anything is left of the Isle of Man in this scenario. That's the little island (two on this map) in the Irish Sea. I wouldn't have thought that many of its hills exceeded 100 meters.

I've been to the Isle of Man because one of my long time friends moved there to take advantage of the tax advantages. He wasn't all that wealthy, but he didn't like paying taxes. He remodeled an old house and built a walk in safe that doubled as a bomb shelter. Not much good against sea level rise, but then he (and I) will be long gone by 2100.
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Quoting 925. yoboi:

There is nothing confusing about 10%....anything more the math just does not add up....
Show your math. Cite your sources. Or drop this line of nonsense...
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you can call me Al....

A man walks down the street
He says why am I short of attention
Got a short little span of attention
And wo my nights are so long
Where's my wife and family
What if I die here
Who'll be my role-model
Now that my role-model is
Gone Gone
He ducked back down the alley
With some roly-poly little bat-faced girl
All along along
There were incidents and accidents
There were hints and allegations
Member Since: December 31, 1969 Posts: Comments:
I always liked Chuck, he was a Helo Man in the Service, "Royal Navy".

Climate change deniers are 'headless chickens' says Prince Charles

CLIMATE change deniers are nothing more than a "headless chicken brigade", Prince Charles claimed today.

The Prince of Wales, who has campaigned for years to reduce global warming, also spoke out against "the barrage of sheer intimidation" from powerful anti-climate change groups during an awards ceremony at Buckingham Palace last night.

The Prince made the comments as he presented leading young green entrepreneur Gamal Albinsaid with the inaugural Prince of Wales Young Sustainability Entrepreneur Prize.

His comments were met with scorn by climate change sceptic Dr Benny Peiser, of Lord Lawson’s Global Warming Policy Foundation, who argued "alarmist" predictions from people such as the Prince were more in keeping with headless chickens.

Prince Charles said: "It is baffling, I must say, that in our modern world we have such blind trust in science and technology that we all accept what science tells us about everything - until, that is, it comes to climate science.

"All of a sudden, and with a barrage of sheer intimidation, we are told by powerful groups of deniers that the scientists are wrong and we must abandon all our faith in so much overwhelming scientific evidence.

"So, thank goodness for our young entrepreneurs here this evening, who have the far-sightedness and confidence in what they know is happening to ignore the headless chicken brigade and do something practical to help."

He added: "Perhaps it has been too uncomfortable for those with vested interests to acknowledge, but we have spent the best part of the past century enthusiastically testing the world to utter destruction; not looking closely enough at the long-term impact our actions will have."

Dr Peiser accused the Prince of confusing people who against the policies being put forward to counter climate-change with those who do not believe it is happening.

He said: "I am not surprised. He has been speaking about this for many years.

"A headless chicken is normally someone who is running around panicking, who doesn't really understand what's happening.

"I think he really confuses people like us who are critical of the policies being advanced.

"We are sceptical about the alarmist prediction of what is going to happen."

Mr Albinsaid is the founder of the Indonesian social enterprise Garbage Clinical Insurance, an innovative project which helps the poorest communities gain access to health services and education through the collection and recycling of rubbish.
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Christie Brinkley doing well fer a 60 year Old Model.

Er, wait, am I not on TMZ, er, sorry.

Here's one from the Climate news Barrel.

Billionaire Climate Activist Steyer Urges Review of 'Defective' Keystone Report
Feb 3, 2014


Billionaire Tom Steyer, a Democratic Party donor and Keystone XL foe, called on U.S. Secretary of State John Kerry to begin a review of the "defective" environmental analysis on the pipeline released last week.

The final environmental impact statement on Keystone "has suffered from a process that raises serious questions about the integrity of the document, Steyer, who hosted President Barack Obama at his San Francisco home in April, wrote to Kerry yesterday in a letter.

The letter:

Click Link for letter
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Quoting 918. Cochise111:
New paper finds that water vapor acts as negative-feedback mechanism, not positive-feedback as has been proclaimed for so long:

"May slightly weaken". Awesome. Let's celebrate!

Now, the fact that the Hokey Stick is hyperventilating leads me to a question: how is it that anti-realists can claim repeatedly there is no man made global warming, but then turn around with a straight face and cite a paper that fully supports global warming theory?

You guys seem really confused....
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Winter ice season is now 24 days shorter than it was in 1950, study finds

Researchers utilized the Canadian Lake Ice Model to assess ice cover and lake ice thickness for those years before satellite images were available.

According to a University of Waterloo news release, Arctic lakes have been freezing up later in the year and thawing earlier, cutting the winter ice season by 24 days. The study also finds that climate change has dramatically impacted the thickness of lake ice at the coldest point in the season. In 2011, for example, Arctic lake ice was as much as 38 cm thinner than it was in 1950.

We've found that the thickness of the ice has decreased tremendously in response to climate warming in the region, noted lead author Cristina Surdu, a PhD student of Professor Claude Duguay in the University of Waterloo's Department of Geography and Environmental Management.When we saw the actual numbers we were shocked at how dramatic the change has been. It's basically more than a foot of ice by the end of winter.

This is the first time that researchers have been able to record the significance of lake-ice alterations in the region over such an extended period of time.

Prior to starting our analysis, we were expecting to find a decline in ice thickness and grounded ice based on our examination of temperature and precipitation records of the past five decades from the Barrow meteorological station, posited Surdu At the end of the analysis, when looking at trend analysis results, we were stunned to observe such a dramatic ice decline during a period of only 20 years.

The researchers utilized satellite radar imagery from the European Space Agency to figure out that 62 percent of the lakes in the region froze down to the bed in 1992. Nearly 20 years later, only 26 percent of lakes froze to the bottom.

Researchers were able to differentiate between a fully frozen lake and one that had not frozen all of the way down to its bed, because satellite radar signals act in a different manner, based on presence or lack of water beneath the ice.

For example, radar signals are absorbed into the sediment under the lake when it is frozen down to its bed. However, when water exists underneath the ice, the radar signal bounces back towards the radar system. As a result, lakes that are not frozen to the bottom are bright on satellite images.

Researchers utilized the Canadian Lake Ice Model to assess ice cover and lake ice thickness for those years before satellite images were available.

The model simulations reveal that lakes in the region froze nearly six days later and broke up approximately 18 days earlier in the winter of 2011 compared to the winter of 1950. The loss of 24 days to the winter season could significantly impact lake algal productivity as well as thawing of permafrost under lake beds.

The changes in ice and the shortened winter affect Northern communities that depend on ice roads to transport goods, explained Surdu. The dramatic changes in lake ice may also contribute to further warming of the entire region because open water on lakes contribute to warmer air temperatures, albeit to a lesser extent than open sea water.

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Quoting 911. indianrivguy:

I had not, until today, found my way to your Blog. Very nice sir, tons of interesting stuff to learn, thanks!

Thanks 7 years of observed events there.
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Why rainbows and oil slicks help to show the greenhouse effect

Figure 2: Takakkaw Falls rainbow in the misty spray from the waterfall. Rainbows show that light is made of many colours, and we can split light and analyse these colours separately. This is a key technique that has identified the greenhouse effect (stunning image courtesy of Wiki).
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Quoting 914. JohnLonergan:
I missed the word fictional. My bad.

I'm glad it's fictional, really. But currently they do great efforts in the UK to match the fiction ;-)

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Quoting 912. indianrivguy:

A current map plotted on that one would have helped me understand the impacts much better.. how much sea level rise does that represent John?

100 meters, here is the original article:

British Isles in 2100
http://jaysimons.deviantart.com/art/British-Isles -in-2100-315945336

This is the map of the British Isles in fictional 2100 rising sea level scenario(to see map of entire Europe, follow this the9988.deviantart.com/art/Eur….

After global warming and rising of sea levelsharply escalated, sea level is now 100 meters higher than it was in year 2000.

This is the first regional map of the "World in 2100 series". In this scenario, Scotland and Northern Ireland split from United Kingdom(Northern Ireland joined Ireland). After sinking of London and Dublin, Birmingham and Belfast have become new capitals of Britain and Ireland.

I missed the word fictional. My bad.

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Ehm, nice combination of news on Mongabay.com today ;-)

Total says it will not drill in any World Heritage Sites
(02/03/2014) One of the world's largest oil and gas companies, Total, has committed to leave the planet's UNESCO World Heritage Sites untouched, according to the United Nations. The UN says the French energy giant has sent written confirmation that it will not explore or extract fossil fuels from any of the world's over 200 natural World Heritage Sites.

Australia proposes removing old-growth forests from World Heritage Site
(02/03/2014) Last year, after decades of fighting, environmentalists and the forestry industry reached a landmark agreement that added 170,000 hectares of old-growth forest in Tasmania as a part of a World Heritage Site. But less than a year later and that so-called peace agreement is in danger of unraveling. The new Australian government, under Prime Minister Tony Abbott, is going ahead with removing 74,000 hectares (43 percent) from the World Heritage site.
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Quoting 910. JohnLonergan:

A current map plotted on that one would have helped me understand the impacts much better.. how much sea level rise does that represent John?
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I had not, until today, found my way to your Blog. Very nice sir, tons of interesting stuff to learn, thanks!
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Arctic's 'Layer Cake' Atmosphere Blamed for Rapid Warming

The Arctic is leading a race with few winners, warming twice as fast as the rest of the Earth. Loss of snow and ice, which reflect the sun's energy, is usually blamed for the Arctic temperature spike.

But a new study suggests the Arctic's cap of cold, layered air plays a more important role in boosting polar warming than does its shrinking ice and snow cover. A layer of shallow, stagnant air acts like a lid, concentrating heat near the surface, researchers report today (Feb. 2) in the journal Nature Geoscience. [Images of Melt: Earth's Vanishing Ice]

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Arctic Heat in Winter — February 2 Temperature Anomaly Hits +13 F For Entire Arctic

After a record warmth event shattered all time high temperatures across Alaska and resulted in melt-spurred avalanches that cut off Valdez from the mainland, heat in the high Arctic continued to intensify through late Sunday. According to reports from The Climate Change Institute, the Arctic temperature anomaly hit +7.07 C (nearly +13 F) above daily averages for the entire Arctic on February 2.

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The stock market this last week... yeeesh...

INDU:IND 15,389.08 -309.77 -1.97%

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Greenland's fastest glacier reaches record speeds

"We are now seeing summer speeds more than 4 times what they were in the 1990s on a glacier which at that time was believed to be one of the fastest, if not the fastest, glacier in Greenland," says Ian Joughin, a researcher at the Polar Science Center, University of Washington and lead-author of the study.

In the summer of 2012 the glacier reached a record speed of more than 17 kilometres per year, or over 46 metres per day. These flow rates are unprecedented: they appear to be the fastest ever recorded for any glacier or ice stream in Greenland or Antarctica, the researchers say.

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Sabesp, as Brazil’s biggest water utility is known, is offering business and residential clients in the greater Sao Paulo area a 30 percent discount through August if they cut their monthly usage 20 percent below their average between February 2013 and January 2014, the Sao Paulo-based company said in a statement on its website. ,,,,,,,,,,,,,,,,, The water utility said it announced the measures after the region’s lowest rainfall in the past two months since measurements began in 1930. Sabesp’s Cantareira water system, which supplies water to almost 10 million people, is at a “critical level,” according to the statement. The system is at 21.9 percent of capacity, its lowest level ever.

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- Climate change appears to be hitting harder and faster than feared

Pakistan Has A Month’s Worth Of Water Left — And 5 Percent Of Its Tree Cover

Pakistan is one of the most vulnerable countries in the world to the impacts of climate change due to its location, population and environmental degradation. According to a 2013 report from the Asian Development Bank, Pakistan has one month of water supply on hand. The recommended amount is 1,000 days. 80 percent of Pakistan’s agriculture relies on irrigation from the overstressed water system.

Pakistan’s average temperature is expected to increase around 3 degrees Celsius within the next 50 years — this will make food and water challenges even more taxing. A new study published in the journal Nature Climate Change concludes that people are already migrating out of the Pakistan for just these reasons.

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902. ARiot
Quoting 770. Naga5000:

Oh I know, but our public aint so smart sometimes. :) I am not suggesting the government institute authoritarian policy, but energy policy should definitely be more geared towards renewables anyways. Let's not pretend fossil fuels are infinite.
If this was framed from the get go as an issue of renewables allowing the U.S. to become energy independent and a world leader of future energy production instead of policy being dictated by big coal and oil, we might be in a different position.

I agree, but think about this.

Let's find an example when a government didn't use more authoritarian policy measures to solve a crisis?

Wait. I can't think of any.

While it's true that when we "want" something, we throw piles of money at a few people (see NASA), but when TSHTF, we go authoritarian. Everyone does.

Depression - Check
WWII - Check
GWOT - Check

You name it, anything since the industrial age that has been really threatening has been answered in one way, not becuase it's the best way but because we had no options.

So yeah, we could naitonalize fossil fuel industries right now to begin the smooth and orderly trasition to alternatives on a 50 year timeline.

But we won't.

We're all about waiting until TSHTF.
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From the Guardian..
Michel Mann..
"Approving Keystone XL could be the biggest mistake of Obama's presidency"..
Click HERE..


"So, looking through the lens of path dependency, what does the Keystone XL project look like?

It looks like decades of extracting high-CO2 fuel at a time when we should be winding down such carbon intensive resource exploitation. It looks like decades of oil spills across America's heartland written off as an acceptable side effect of making money. It looks like decades of continued political lobbying against any CO2-limiting regulations."

Image is Embedded to link of Image..

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Alaska's Arctic icy lakes lose thickness
By Jonathan Amos Science correspondent, BBC News, 3 February 2014 Last updated at 13:10 GMT
The ubiquitous shallow icy lakes that dominate Alaska's Arctic coastal plain have undergone a significant change in recent decades.
These lakes, many of which are no more than 3m deep, melt earlier in the season and retain open water conditions for much longer.
And 20 years of satellite radar also now show that far fewer will freeze right through to the bottom in winter.
The results of the space-borne survey are published in The Cryosphere.
What is happening to the lakes is an example of how land ice is following the pattern of diminishing sea ice in the region, say scientists.
"The decline after 2006 is quite sharp," explained Dr Cristina Surdu from the University of Waterloo, Ontario, Canada. "This is another piece in the puzzle of climate change in the region. ...

Whole article see link above.
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Quoting 888. Daisyworld:
Summer Sea Levels Rising Fast Along Florida's Gulf Coast

I saw that earlier yesterday Daisy..
Thank you for posting it..
I find it both very interesting and
Tho not totally unexpected..
sigh.. :(
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Quoting 893. iceagecoming:

blizzard, in eastern Europe...
Thanks for that European weather report. Of course, most of us know that it is winter in the northern hemisphere. Blizzards happen in winter. Unfortunately, due to the slow, lazy looping of the northern polar jet stream - extensively blogged about by Dr. Rood - Arctic air periodically comes down to lower latitudes, and with a warming atmosphere that holds more moisture - lots of snow can fall.

There! Now you've been educated a bit. However, you really should read Dr, Rood's postings about the Arctic Oscillation and Dr. Masters' postings about whiplash weather. Then you could post intelligently and not make such a fool of yourself.

It's amazing what one can learn if one opens their eyes a bit and learns how to think critically.

And of course, all people who have bothered to inform themselves know that on a global level, heat is increasing, and high temp records greatly outnumber low temp records.

It's strange that some people choose to remain ignorant of this fact.
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and this is not helping temps any time soon.

Mount Sinabung paints Sumatra gray

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Dr. Ricky Rood's Climate Change Blog

About RickyRood

I'm a professor at U Michigan and lead a course on climate change problem solving. These articles often come from and contribute to the course.

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