Small eddies produce global effects on climate change

The increasing strength of winds over the Southern Ocean has extended its ability to absorb carbon dioxide, effectively delaying the impacts of global warming.

New research published in the Journal of Physical Research found the intensifying wind over that ocean increased the speed and energy of and jets, which are responsible in large part for the movement of nutrients, heat and salt across the .

The increased movement and overturning of these eddies and jets has accelerated the and driven more heat into the .

"Considering the Southern Ocean absorbs something like 60% of heat and anthropogenic CO2 that enters the ocean, this wind has a noticeable effect on global warming," said lead author Dr Andy Hogg from the Australian National University Hub of the ARC Centre of Excellence for Climate System Science.

"To put this in some kind of context, if those small scale eddies did not increase with wind stress then the saturation of in the Southern Ocean sink would occur twice as rapidly and more heat would enter our atmosphere and sooner."

Despite having one of the most powerful currents in the world in the form of the Antarctic Circumpolar Current, eddies dominate the circulation of the Southern Ocean. Until this research, a major uncertainty around the future impacts of climate change was whether the eddy field would change with stronger winds or whether it would remain static.

Using satellite observations the study has given the first direct evidence that the Southern Ocean eddy field has increased in recent decades and that this increase can be attributed to the increase in winds around the Southern Ocean.

Animation: A high resolution (1/20°) regional simulation of the Southern Ocean, including a peek at a submesoscale (1/80°) resolving nested simulation showing eddies and jets. Picture (left): Rough Ocean by CSIRO images.

The intensification of winds in the Southern Ocean is a result of both the depletion of ozone and global warming's affects on the Southern Annular Mode (SAM). The SAM is a measure of the position of a belt of westerly winds that circle Antarctica.

When climate scientists talk about a positive SAM it means that belt of westerlies has moved closer to the Antarctic. A negative SAM means the wind belt has moved closer to the equator. The position of the SAM can vary from year to year but the long-term trend has been for increasingly positive SAM events.

"Interestingly, we found the movement and strength of the SAM played the largest role in increasing the energy of the eddies in the Southern Ocean over periods of less than a decade but there were clear delays between the timing of the SAM and its effect on the eddies," said Dr Hogg.

"The increase in kinetic energy of these eddies actually only became apparent a few years after a strong SAM event."

Although the impact of SAM events over the short term was an interesting finding, it was the long-term trend over multiple decades of observations that gave a crucial indication of the changes occurring in the Southern Ocean.

"If the winds continue to increase as a result of global warming, then we will continue to see increased energy in eddies and jets that will have significant implications for the ability of the Southern Ocean to store carbon dioxide and heat," said Dr Hogg.

"Remarkable as it seems these relatively small eddies and are doing the heavy lifting in the ocean driving into the Southern Ocean and slowing the impacts of ."


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Mixing it up: Study provides new insight into Southern Ocean behaviour

More information: Journal of Physical Research, onlinelibrary.wiley.com/doi/10 … 014JC010470/abstract
Citation: Small eddies produce global effects on climate change (2015, March 10) retrieved 18 October 2019 from https://phys.org/news/2015-03-small-eddies-global-effects-climate.html
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Mar 10, 2015
Now, if we could just figure out why all this Southern Ocean warming is causing Antarctic seasonal sea ice to grow to the highest levels ever recorded.

Mar 10, 2015
Antarctic sea ice growth was predicted by models, since the warming of the seas are evaporating more water, which creates more snow and ice.

It is the ice now sliding off the land which is the worry. I suggest you get educated, so you can help instead of hinder our actions to save the Earth.

Mar 10, 2015
The increase in CO2 will accelerate the acidification of the oceans. We are already affecting organisms at the bottom of the marine food chain. They provide half of our food and half of our Oxygen.

This guy must be the designated "Science Officer" in his Grammar School class.

Mar 10, 2015
Interestingly, there have been a number of conversations on this site regarding the mechanism responsible for the transport of heat from the surface to the deep ocean. This gives a good explanation for a big part of it, and when combined with other studies linking the increased trade winds in the Pacific speeding the overturn in the West Pacific, we now have clear evidence for at least 2 mechanisms responsible for the transfer of heat to the deep oceans.

I find it even more interesting that the ubamoron came across a similar study which he posted here a couple of years ago, which was also describing this same type of overturning in the southern oceans. I can't remember what he was trying to show (as usual, he didn't understand it and linked it because of the title or one sentence in the abstract) but I'm sorry I didn't bookmark it, as it seems to fits very well with the conclusions of this study. I'll hunt for it.

Mar 11, 2015
I am sure I will be insulted for this post. But it was not long ago these people claimed a ice age was coming. Then we are all going to die because of global warming.. Well I have read number of artilces showing the temp has been cooling. And when you read these articles it is almost always, could, possiable,may, can etc etc. The change is always in the future. I remember when I started hearing about the global warming back in the 80,s.. I remember all the things it was going to cause by 2000. All but none has. So is it possiable this is simply a normal cycle powered by the sun. Which has cooled down for the past few years?

Mar 11, 2015
"these people claimed a ice age was coming"
-------------------------------------

Really? Same ones? Geologically, we are on the precipice of an Ice Age. But geological time is not Human time.

Even in Tennessee things are changing, and those who study these changes for a profession tell us what is happening. You can choose to not "believe" it, but it is happening.

Mar 11, 2015
tnrebel, the Ice Age idea came from one person, who mused that, if the current conditions (in the 1970's) were to remain, we would plunge into an ice age. It was not serious science, but musing, and he recently said how surprised he was that everybody picked it up as if it were some revealed truth of imminent occurrence.

Mar 11, 2015
tnrebel, the Ice Age idea came from one person, who mused that, if the current conditions (in the 1970's) were to remain, we would plunge into an ice age. It was not serious science, but musing, and he recently said how surprised he was that everybody picked it up as if it were some revealed truth of imminent occurrence.


Can you cite this please.

Mar 11, 2015
"Can you cite this please."

Okay, I'll look it up for you.

Mar 11, 2015
I just went through my browsing history, and can't find it, so it came out last year.
I'll go look online.

Mar 11, 2015
... these people claimed a ice age was coming
@thetnrebel
which people?
we are all going to die because of global warming
show me one scientific study that makes this claim
you are referring to comments or political/religious/anti-science sites or promotions
NOT SCIENCE

that is not to say that the possibility is not there, because it is
& that is about PROBABILITY
Which has cooled down for the past few years?
except that it has NOT cooled (and don't confuse WEATHER with CLIMATE)

the latest 30 year trend

http://www.woodfo.../to:2015

IF you want to discuss the latest cold weather in the US, i have scientific studies for that which PREDICTED that WEATHER

Mar 11, 2015
Which has cooled down for the past few years?
@thetnrebel
OR is this about the SUN cooling down?
please be specific... because as you can see by my above link, the globe is NOT cooling down

just to share some facts with you about the latest cold snaps (weather) in the US, you will find that explained here: : http://marine.rut..._pub.pdf
additional data/study on the first link: http://iopscience...4005.pdf
Francis 40 min video: https://www.youtu...m9JAdfcs
Francis short but sweet vid: https://www.youtu...wJg4Ebzo

I am a former "skeptic"
if you want REAL answers, stay away from political sites, religious ones, sites supported by either and BIASED sites (like Poptech- proven BIASED here on PO)

STICK TO THE SCIENTIFIC STUDIES for proof
when they say they've debunked studies- the study should be deleted/retracted
otherwise it's a LIE

Mar 11, 2015
The "cooking" of climate data is responsible for man made global warming.
http://appinsys.c...ates.htm

Mar 11, 2015
I just went through my browsing history, and can't find it, so it came out last year.
I'll go look online.
Well of course you cant because you made it up, like you made up that shit about high energy alpha cant penetrate skin.

Also, fallout is the major cause of lung cancer (not even on the list)

Also, fukushima H2 explosions can throw macroscopic vessel parts 120km.

Also there is plutonium or americium raining down on idaho.

Also, You were an engineer even though you admitted you were not.

Also, delivering powerpoint presentations prepared by engineers makes you an engineer - no wait - gives you the experience equivalent to actually being an engineer.

-But I do understand how your compulsion to impress makes it hard to resist the urge to spout outrageous bullshit. Poor baby.

Mar 11, 2015
Many scientists know we are on the verge of another ice age.

"But even [AGW] warming will not stave off the eventual return of huge glaciers, because ice ages last for millennia and fossil fuels will not. In about 300 years, all available fossil fuels may well have been consumed.Over the following centuries, excess carbon dioxide will naturally dissolve into the oceans or get trapped by the formation of carbonate minerals. Such processes won't be offset by the industrial emissions we see today, and atmospheric carbon dioxide will slowly decline toward preindustrial levels. In about 2,000 years, when the types of planetary motions that can induce polar cooling start to coincide again, the current warming trend will be a distant memory."
-Professor Franklin Hadley Cocks '63, SM '64, ScD '65, teaches energy technology and climate-related courses at Duke University and is the author of Energy Demand and Climate Change

Mar 11, 2015
Has otto ever told you folk what he did for a living?

Ever wonder why not?

I do not read his posts, but see them follow mine, and assume he is asking for more discussion, . . . but he burned those bridges.

There is some question of how much CO2 the seas can hold at higher temperatures, stirring or no, so we may not be able to depend on them as a sink much longer. But before that happens, we will likely lose the Marine Food Chain to acidification.

Mar 11, 2015
Because it doesnt matter blowhard. You make up a phony past and then use it to justify your made-up science, thinking that nobody would check someone with such impressive credentials.

But you really dont have to check if fallout is the major cause of lung cancer or not. Only an imbecile would try to sell that here, and then claim to know its true because he worked at a nuke plant once. As an engineer. But then any engineer would know that fukushima H2 explosions cant throw macroscopic vessel parts 120km, right?

Only an imbecile would think that the people here would buy this.

Mar 11, 2015
I took otto off ignore because I needed a laugh.

Nope, never worked in a nuke plant. Did our tests elsewhere, and my visits to them were not in a professional capacity. Yup, was a Senior Engineer in Technical Services for PG&E, . . want to see my card? Did I need a PE for that? Yup, was a semiconductor Test Engineer for National. Did I need a PE to put together the physical system and modify the software so we could put out the LM555?

Those with no experience lean on papers, credentials, like HR folk trying to match words, not understanding the fields. Otto won't read mine, so I gave up playing his offensive smear game.

Now, perhaps he would like to discuss the acidification of the oceans.

Mar 11, 2015
I am sure I will be insulted for this post. But it was not long ago these people claimed a ice age was coming. Then we are all going to die because of global warming.. Well I have read number of artilces showing the temp has been cooling. And when you read these articles it is almost always, could, possiable,may, can etc etc. The change is always in the future. I remember when I started hearing about the global warming back in the 80,s.. I remember all the things it was going to cause by 2000. All but none has. So is it possiable this is simply a normal cycle powered by the sun. Which has cooled down for the past few years?

What a dim bulb (you did want to be insulted right?). Bottom line is that modern thoughts on global warming started in 1970. That is the antopogenic theory of global warming. Here is wikipedia;

http://en.wikiped..._science

Science has progressed and now if you don't believe AGW your an idiot most dense!

Mar 12, 2015
Nope, never worked in a nuke plant. Did our tests elsewhere, and my visits to them were not in a professional capacity. Yup, was a Senior Engineer in Technical Services for PG&E, . . want to see my card?
Nope, you were a temp with a job shopper title filling out validation forms which anyone can do.
Did I need a PE for that?
You need a PE to claim to be an engineer which you have done many times in order to justify the nonsense you post.

Nobody gives a shit about your 'experience' especially since everyone knows it's 90% inflated and fabricated. Nobody's asked you about it have they? They've told you it means nothing haven't they?

But since you use it to justify bullshit about lung cancer and high energy alpha and single source ice age predictions and complex systems, which you make up yourself, your 'experience' is worse than worthless isn't it?

How does filling out forms and reading PowerPoint prepared by others qualify as experience anyway?

Mar 12, 2015
Those with no experience lean on papers, credentials, like HR folk trying to match words, not understanding the fields
Gkam doesn't feel the need to reference experts because he thinks his 'experience' has taught him more than they will ever know. And so he gets to make up outrageous bullshit - why not?
Otto won't read mine, so I gave up playing his offensive smear game
But I read your offensive posts about fallout causing lung cancer and high energy alpha not penetrating skin (so who needs shielding?) and H2 explosions throwing reactor parts 120km and plutonium raining down on idaho and self-stabilizing complex systems and - in this thread - only one scientist predicting the next ice age.

And how much similar such outrageous bullshit have I missed gkam?
discuss acidification
-And why would I want to discuss anything with someone who makes up facts in order to win arguments? Who lies about his past in order to impress people?

Mar 12, 2015
And the curious thing is that people like vietvet downrate me for exposing your bullshit and lies, and uprate you for the same things. Vietvet, you know that, because of his track record here, gkam is probably lying about serving in Vietnam?

Doesn't the possibility offend you deeply? Has he given you sufficient evidence to prove that he was ever in fact in-country? Why haven't you asked for it? Or don't you give a shit either as long as he supports the same things you do?

Mar 12, 2015
Isn't it fun to see otto go crazy?

(If anybody wants to see my references/proof of my life/claims, send me an email address.)

Mar 12, 2015
Small eddies may affect climate,
but nothing does it like "cooking" the data.
http://appinsys.c...e023.gif
http://appinsys.c...ates.htm

Mar 15, 2015
Small eddies may affect climate,
but nothing does it like "cooking" the data.
http://appinsys.c...rming/RS


That's right, auntie griselda.

And no one "cooks" the data better than your pal, Mr "Cheet"ham.
For sheer, smug arrogance, he is difficult to beat.

I say arrogance, because he relies upon gullibility to foist his lies upon the unwary, just like the prototypical carny huckster.

And auntiegriselda is a sucker for a carny huckster, if ever there was one born. Worse yet, auntie griselda knows this about herself, and tries to make herself feel better about it by propagating the con, because wilful disunderstanding loves company.

Plus, anything to distract herself from the discomfort of a chronically soiled diaper, filled with the indigestible cherry pickings and irrelevant, gristly factoids with which "Cheet"ham has baked his appinsys denierpie, which auntiegriselda has swallowed whole.

Nurse will be along soon with a fresh didy, auntieg.

Mar 15, 2015
Many scientists know we are on the verge of another ice age.

"But even [AGW] warming will not stave off the eventual return of huge glaciers, because ice ages last for millennia and fossil fuels will not. In about 300 years, all available fossil fuels may well have been consumed.[...]In about 2,000 years, when the types of planetary motions that can induce polar cooling start to coincide again, the current warming trend will be a distant memory."
-Professor Franklin Hadley Cocks '63, SM '64, ScD '65, teaches energy technology and climate-related courses at Duke University and is the author of Energy Demand and Climate Change


True for as far as it goes...and yes, natural long-term climate variability a la Milankovitch are sending us into another glacial cycle, but pfr Cocks fails to take into account the likelihood of AGW causing extra feedbacks via clathrate, permafrost, peat bogs, swamps, etc, that are likely to really magnify and prolong AGW.

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