Widespread loss of ocean oxygen to become noticeable in 2030s

Widespread loss of ocean oxygen to become noticeable in 2030s
Deoxgenation due to climate change is already detectable in some parts of the ocean. New research from NCAR finds that it will likely become widespread between 2030 and 2040. Other parts of the ocean, shown in gray, will not have detectable loss of oxygen due to climate change even by 2100. Credit: Matthew Long, NCAR.

A reduction in the amount of oxygen dissolved in the oceans due to climate change is already discernible in some parts of the world and should be evident across large regions of the oceans between 2030 and 2040, according to a new study led by the National Center for Atmospheric Research (NCAR).

Scientists know that a warming climate can be expected to gradually sap oceans of oxygen, leaving fish, crabs, squid, sea stars, and other marine life struggling to breathe. But it's been difficult to determine whether this anticipated oxygen drain is already having a noticeable impact.

"Loss of oxygen in the is one of the serious side effects of a warming atmosphere, and a major threat to marine life," said NCAR scientist Matthew Long, lead author of the study. "Since oxygen concentrations in the ocean naturally vary depending on variations in winds and temperature at the surface, it's been challenging to attribute any deoxygenation to . This new study tells us when we can expect the impact from climate change to overwhelm the natural variability."

The study is published in the journal Global Biogeochemical Cycles, a publication of the American Geophysical Union. The research was funded by the National Science Foundation, NCAR's sponsor.

Cutting through the natural variability

The entire ocean—from the depths to the shallows—gets its from the surface, either directly from the atmosphere or from phytoplankton, which release oxygen into the water through photosynthesis.

Warming surface waters, however, absorb less oxygen. And in a double whammy, the oxygen that is absorbed has a more difficult time traveling deeper into the ocean. That's because as water heats up, it expands, becoming lighter than the water below it and less likely to sink.

Thanks to natural warming and cooling, oxygen concentrations at the sea surface are constantly changing—and those changes can linger for years or even decades deeper in the ocean.

For example, an exceptionally cold winter in the North Pacific would allow the ocean surface to soak up a large amount of oxygen. Thanks to the natural circulation pattern, that oxygen would then be carried deeper into the ocean interior, where it might still be detectable years later as it travels along its flow path. On the flip side, unusually hot weather could lead to natural "dead zones" in the ocean, where fish and other cannot survive.

To cut through this natural variability and investigate the impact of climate change, the research team—including Curtis Deutsch of the University of Washington and Taka Ito of Georgia Tech—relied on the NCAR-based Community Earth System Model, which is funded by the National Science Foundation and the U.S. Department of Energy.

The scientists used output from a project that ran the model more than two dozen times for the years 1920 to 2100 on the Yellowstone supercomputer, which is operated by NCAR. Each individual run was started with miniscule variations in air temperature. As the model runs progressed, those tiny differences grew and expanded, producing a set of climate simulations useful for studying questions about variability and change.

Using the simulations to study dissolved oxygen gave the researchers guidance on how much concentrations may have varied naturally in the past. With this information, they could determine when ocean deoxygenation due to climate change is likely to become more severe than at any point in the modeled historic range.

The research team found that deoxygenation caused by climate change could already be detected in the southern Indian Ocean and parts of the eastern tropical Pacific and Atlantic basins. They also determined that more widespread detection of deoxygenation caused by climate change would be possible between 2030 and 2040. However, in some parts of the ocean, including areas off the east coasts of Africa, Australia, and Southeast Asia, deoxygenation caused by climate change was not evident even by 2100.

Picking out a global pattern

The researchers also created a visual way to distinguish between deoxygenation caused by natural processes and deoxygenation caused by climate change.

Using the same model dataset, the scientists created maps of oxygen levels in the ocean, showing which waters were oxygen-rich at the same time that others were oxygen-poor. They found they could distinguish between oxygenation patterns caused by natural weather phenomena and the pattern caused by climate change.

The pattern caused by climate change also became evident in the model runs around 2030, adding confidence to the conclusion that widespread deoxygenation due to climate change will become detectable around that time.

The maps could also be useful resources for deciding where to place instruments to monitor ocean oxygen levels in the future to get the best picture of . Currently ocean measurements are relatively sparse.

"We need comprehensive and sustained observations of what's going on in the ocean to compare with what we're learning from our models and to understand the full impact of a changing climate," Long said.


Explore further

Microfossils reveal warm oceans had less oxygen, Syracuse geologists say

More information: Matthew C. Long et al, Finding forced trends in oceanic oxygen, Global Biogeochemical Cycles (2016). DOI: 10.1002/2015GB005310
Journal information: Global Biogeochemical Cycles

Provided by National Center for Atmospheric Research
Citation: Widespread loss of ocean oxygen to become noticeable in 2030s (2016, April 27) retrieved 18 September 2019 from https://phys.org/news/2016-04-widespread-loss-ocean-oxygen-2030s.html
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Apr 27, 2016
It has been colder (4th and 5th Century CE; Little Ice Age) and warmer (Viking Era) than now in historical times, well before the Industrial Revolution. The hockey stick is a contrived falsehood.

All warming or cooling observed falls within the range of normal.

Apr 27, 2016
the oxygen that is absorbed has a more difficult time traveling deeper into the ocean. That's because as water heats up, it expands, becoming lighter than the water below it and less likely to sink.

Never mind that this contradicts the other lie, that all the heat is going into the deep ocean. That's peer reviewed Climate "science" for you.

Apr 28, 2016
Basically, we're fucked. Thanks, world.

Apr 28, 2016
Someone once suggested creating artificial icebergs and towing them out to sea. Don't know if it would work. That would be a lot of bergs to cover that much warmed water. It might be feasible, but would be very expensive. And the tugs would still be running on fossil fuels.

Apr 28, 2016
I don't know, but there seems to be something fishy about this article. Very contradictory in its context.
"Using the same model dataset, the scientists created maps of oxygen levels in the ocean, showing which waters were oxygen-rich at the same time that others were oxygen-poor. They found they could distinguish between oxygenation patterns caused by natural weather phenomena and the pattern caused by climate change."
AND THEN
"The pattern caused by climate change also became evident in the model runs around 2030, adding confidence to the conclusion that widespread deoxygenation due to climate change will become detectable around that time.
The maps could also be useful resources for deciding where to place instruments to monitor ocean oxygen levels in the future to get the best picture of climate change impacts. Currently ocean oxygen measurements are relatively sparse"
How do you tell difference between patterns in a MODEL and project into the future as tho water won't mix?

Apr 28, 2016
Basically, we're fucked. Thanks, world.
- leetenant
Not quite yet.

They are using only a MODEL to project what will happen by 2030, while ADMITTING that
"Currently ocean oxygen measurements are relatively sparse."
AND
"The maps could also be useful resources for deciding where to place instruments to monitor ocean oxygen levels in the future(...)
"Currently ocean oxygen measurements are relatively sparse." means they are groping in the dark and their measurements are OLD.
"We need comprehensive and sustained observations of what's going on in the ocean to compare with what we're learning from our models"

1) They're working from a MODEL
2) Current ocean 02 measurements are sparse.
3) Maps to decide where to place instruments.
4) Needing comprehensive & sustained observations of the oceans...while learning from MODELS.

ummm anybody detecting a snake oil salesman in all this?

Apr 28, 2016
Re The HIATUS -

http://dailycalle...ng-data/

"Hundreds of scientists sent a letter to lawmakers Thursday warning National Oceanic and Atmospheric Administration (NOAA) scientists may have violated federal laws when they published a 2015 study purporting to eliminate the 15-year "hiatus" in global warming from the temperature record."
"We, the undersigned, scientists, engineers, economists and others, who have looked carefully into the effects of carbon dioxide released by human activities, wish to record our support for the efforts of the Committee on Science, Space and Technology to ensure that federal agencies complied with federal guidelines that implemented the Data Quality Act," some 300 scientists, engineers and other experts wrote to Chairman of the House Science Committee, Texas Republican Rep. Lamar Smith."

Apr 28, 2016
Relax, these climate alarmists reports are phony.

https://stevengod...-busted/

Apr 28, 2016
It has been colder (4th and 5th Century CE; Little Ice Age) and warmer (Viking Era) than now in historical times, well before the Industrial Revolution. The hockey stick is a contrived falsehood.

All warming or cooling observed falls within the range of normal.

This has nothing to do with the article, and has been reported for being off topic. Maybe try reading the article and actually commenting on its substance rather than pushing your ideology, here.

Apr 28, 2016
The hiatus itself was a much bigger lie than whatever people suggested might have been the cause of it.

You are the epitome of stupid. So, find someone with a brain [you'll need to look outside the Chicken Little club] and have them try to explain to you, just who were these people that suggested the 66 explanations for the pause.
http://www.climat...warming/

Apr 28, 2016
Wasn't some evidence of life found under the ice during the time of snowball earth? Is it possible deep sea vents contain bacteria that produce O2? Or deep sea floor microbes? I admit there is no evidence but finding life on the floor of the Med --Lorciferans--where is claimed no oxygen leaves the door open.

Apr 28, 2016
@katesisco
Yes, deep sea volcanic vents are teeming with microscopic anaerobic life. I'm not a biologist, but I don't think such microbes require O2. I think that they also ingest CH4, and possibly CO2, if I'm not mistaken.
I hope I'm not wrong on this.

Apr 28, 2016
Be aware of "obama_socks", just like schizophrenic "Benni", both make many unsupportable claims, they can't do basic arithmetic & despite being here since 2011-12 haven't learned even basic Physics Eg Radiative Transfer (RT).

These nicks & with antigoracle can't be trusted in anything written, they'll weave their way into your psyches, mislead, muddy the waters, obfuscate & all round waste everyone's time, example here:-

http://phys.org/n...ers.html

If people mistakenly claim Science or mis-speak they should address it when alerted, respond maturely, man up & apologise. I do this, Eg crossing terms, genus, maths misplaced decimal or suffix etc etc

Definitely NO unsupportable claims, if someone doesnt understand my comments I will address it head even if they bark uneducated childish complaint eg Benni & bschott

Still waiting for obama_socks "verifiable evidences" & Benni to prove his uni degrees etc ?

Lets improve the forum please ?

Apr 28, 2016
can't be trusted in anything

Uh huh. Tell us, who's the thief?

Apr 29, 2016
antigoracle Fails again asking
can't be trusted in anything

Uh huh. Tell us, who's the thief?
Well obviously you stealing people's trust like others, dragging the forum down, making idle unsupportable claims & going nowhere, utter waste of time :-(

Can only guess, as you are so bad at it, you *must* be paid to drive a political agenda as Eg claiming their own links offer proofs when had *you* read the links they contradict your claims - head on !

Case A
Or you referring to stock trading, now ~ $3Million each 2 months, is it theft to buy when there's offers to sell or to sell when offers to buy ?

Case B
Or you referring to yrs ago & immature angry young males made claims as they couldn't contact me while I was ill & ignoring admins post regarding refunds in full ?

If A, business, I invest in stocks I research well
If B, you can't tell misplaced idle claim from evidence

Else ?

Nada, you Fail yet again proving you're IQ is again questionable :/

Apr 29, 2016
Be aware of "obama_socks", just like schizophrenic "Benni", both make many unsupportable claims

Mutterin' Mike, science charlatan, Bonobo "monkey" enthusiast, liar and thief, blabbers. Mutterin' Mike, is too stupid to realize just how big a jackass he makes of himself with his statement above. Mutterin' Mike, where is your evidence to support your claim that Benni is schizophrenic?

Apr 29, 2016
@katesisco
Yes, deep sea volcanic vents are teeming with microscopic anaerobic life. I'm not a biologist, but I don't think such microbes require O2. I think that they also ingest CH4, and possibly CO2, if I'm not mistaken.
I hope I'm not wrong on this.

He said - PRODUCE Oxygen...
Oxygen is a reactive element. In combination with certain other elements, it generates heat.
In the bigger picture, is it possible the reduction of oxygen is a feedback mechanism (by the planetary system) to reduce heating?

Apr 29, 2016
antigoracle repeating
Mutterin' Mike, science charlatan, Bonobo "monkey" enthusiast, liar and thief, blabbers. Mutterin' Mike, is too stupid to realize just how big a jackass he makes of himself with his statement above
Insanity is doing/saying the same things an expecting a different outcome.

I have no reason or interest in engaging with someone who Refuses to learn even after all this time & with benefit of vast internet resources, you are obviously not rational, go away.

antigoracle asks
.. where is your evidence to support your claim that Benni is schizophrenic?
In the histogram combinatorial results from the script which shows immense disparity in Benni's approach correlated with content.

Please learn 'linguistic profiling', only takes a few hours to get to grips with it, it is however rather subtle & although Benni's schizophrenia isn't significant it is noticeable, learn how to do it yourself instead of relying on me :P

Dependency geesh !

Apr 29, 2016
Insanity is doing/saying the same things an expecting a different outcome.

Insanity is repeatedly asking you to substantiate your claim while getting a different response that dodge the question. You used the same deception to rip off your unsuspecting customers/victims, so why shouldn't you continue using it.

Apr 29, 2016
@katesisco
Yes, deep sea volcanic vents are teeming with microscopic anaerobic life. I'm not a biologist, but I don't think such microbes require O2. I think that they also ingest CH4, and possibly CO2, if I'm not mistaken...

He said - PRODUCE Oxygen...
Oxygen is a reactive element. In combination with certain other elements, it generates heat.
In the bigger picture, is it possible the reduction of oxygen is a feedback mechanism (by the planetary system) to reduce heating?
- WhydG

katesisco wants to know if deep sea vents contain bacteria that produce O2 "where is claimed no oxygen", meaning NO Oxygen.. If NO Oxygen, then the bacteria are not producing Oxygen. They are anaerobic, meaning that they consume oxygen-less gases. They can't magically produce O2 if there was none to begin with. IF there were such bacteria that were able to produce O2 in an oxygen-less environment, then bubbles of oxygen would have changed that environment & ph.

Apr 29, 2016
Insanity is doing/saying the same things an expecting a different outcome.

Insanity is repeatedly asking you to substantiate your claim while getting a different response that dodge the question. You used the same deception to rip off your unsuspecting customers/victims, so why shouldn't you continue using it.
- antiG

I have noticed some things peculiar about M_M and it appears that CaptainStumpRump/Otto has gotten a foothold into MikeMassen's psyche/personality, and M_M has somehow acquired Stump's obsession and preoccupation with/and for, substantiation/evidence as psychological objective/demand for INFORMATION. There is something definitely wrong and spooky about this. It is as though MikeMassen has made a pact with the devil, and it has changed Mike from his former self to this obsessed persona on a witch hunt.

Apr 30, 2016
YOW! The old pokey @obama_socks says "I have noticed some things peculiar". Just when I was going to reply I remembered "My boxer shorts just went on a rampage through a Long Island bowling alley," What could be worst?

Oh, I know. @antigoracle beating the hate drum ... boomb boomb boomb ... "Insanity is repeatedly asking you to substantiate your claim"! YIKES. Insanity is the excuse of the Republicans! They believe reality distorts their sense of television and AM radio when driving there pickup. Fox news reports; "Zombies rule Belgium.".

Apr 30, 2016
antigoracle losing it Fails again
Insanity is repeatedly asking you to substantiate your claim while getting a different response that dodge the question
I asked Eddy questions, didnt make specific claims however, you've already seen links to papers that reference CO2 affecting plants, increasing heat which raises sea levels Eg Tuvalu etc go read em again !

antigoracle Fails with
You used the same deception to rip off your unsuspecting customers/victims, so why shouldn't you continue using it.
What "same" deception, how, what customers, what victims, police, court case, anything evidentiary ?

Obsession on Uncle Ira's dirt digging claim-on-claim - is that smart - you Fail ?

antigoracle, all you ever do is bark claim, you Fail to understand difference between claim-on-claim versus evidence ie a Fail.

I've asked you years ago why CO2 should *not* exhibit thermal properties, you Fail.

Recently I asked you to cover radiative transfer & you Fail ?

Apr 30, 2016
obama_socks (OS) confused bordering on dementia
I have noticed some things peculiar about M_M and it appears that CaptainStumpRump/Otto has gotten a foothold into MikeMassen's psyche/personality, and M_M has somehow acquired Stump's obsession and preoccupation with/and for, substantiation/evidence as psychological objective/demand for INFORMATION
Geesh you've lost it, how stupid can you be OS ?

OS claimed "facts" & "verifiable evidences" yet came up with nothing, ie OS Fails to substantiate key claim.

This is a Science site make a claim & prove it, if not apologise, as correct begavious, heard of "do unto others" the Greeks ?

OS completely losing it
..MikeMassen has made a pact with the devil, and it has changed Mike from his former self
Yeah right, your god made it then closer to god ?

Doh, aren't any gods making devils, gods are far more devil like, see bible claims

Eg. Tell us why jesus came to divide & why his dad failed to teach him to write ?

Apr 30, 2016
This thread is not about religion or superstition. It is about science.

Please go do your religious thing in private.

Thanks.

Apr 30, 2016
The takeaway here is Dead Zones will form in the oceans starting in the 2030s and will become more of a problem by the 2040s.

So, how many people depend on fish for their protein? And how long until they start starving?

May 01, 2016
Since about half of the World's Oxygen comes from Marine organisms, perhaps we should think what it might do to us.

Even Soylent Green is not as bad as starving and suffocating, and that is where we may be headed.

May 02, 2016
lol You have to laugh at deniers, (many of which) that practice "prepping" and hoard gold and silver. Their denial keeps them from seeing what they should be squirreling away for a post-collapse economy. Canned tuna!

You know that about 2070 there'll be some guy in Japan that will pay thousands for a can of some of the last tuna.

May 02, 2016
Yeah it looks like we've had it. Time for all you humans to bend over and kiss your ass goodbye. Try to remember when you were all using fossil fuels (and still are, even indirectly from the grid), while pretending to be just good little boy scouts trying to save the world.
You love to accuse others of not doing their part to save the world also. But the vast majority of you are STILL using some form of transportation that uses smelly gasoline and oil to get from one place to another.
You people STILL can't be bothered to take out full page ads to inform the general masses around the world to quit doing things that make it necessary for coal, oil and gas to be dug and drilled out of the Earth for YOUR CONVENIENCE AND COMFORT.
You all talk big and your name-calling means a lot to you. But are you willing to give up using synthetics derived from coal and oil...like plastic products, e.g., vinyl? Or how about using EXCLUSIVELY natural materials like cotton and rubber?

May 02, 2016
(con't)
Do you drive on roads made of asphalt and tar, or are they using diatoms instead? When do you plan to storm the gates of Microsoft (pun intended) and computer manufacturers who use plastics in the making of their products? If you people don't go "natural" now, the world will surely end much sooner than ___.
Screeching about an AGW doomsday in a website, and yet not doing anything about it in reality, is quite hypocritical, don't you think?
LOL your concerns wrt how someone else uses their own gold and silver belies your actual concern for the environment. It shows that your jealousy of the wealth of others is really what is on your mind, and not clean air, soil and water.
Jealousy of wealth is what is really driving your anguish about AGW, It seems to be the gold and silver that you would most like to have, and to take it from those who have it.

May 02, 2016
"Screeching about an AGW doomsday in a website, and yet not doing anything about it in reality, is quite hypocritical, don't you think?"
------------------------------------

That is why I have done something.

What have you done?

Gripe that cleaning up your act is just the world picking on you?

Outgrow it.

May 02, 2016
He said - PRODUCE Oxygen... ...

- WhydG
katesisco wants to know if deep sea vents contain bacteria that produce O2 "where is claimed no oxygen", meaning NO Oxygen.. If NO Oxygen, then the bacteria are not producing Oxygen.
They are anaerobic, meaning that they consume oxygen-less gases. They can't magically produce O2 if there was none to begin with.

No Oxygen - in the water. The compounds consumed by anaerobic life forms often ARE attached to it (Third most abundant element in the Universe).
IF there were such bacteria that were able to produce O2 in an oxygen-less environment, then bubbles of oxygen would have changed that environment & ph.

O2 interaction would be evident ABOVE them. And it changed our atmosphere, didn't it...:-)

May 07, 2016
Be aware of "obama_socks", just like schizophrenic "Benni", both make many unsupportable claims

Mutterin' Mike, science charlatan, Bonobo "monkey" enthusiast, liar and thief, blabbers. Mutterin' Mike, is too stupid to realize just how big a jackass he makes of himself with his statement above. Mutterin' Mike, where is your evidence to support your claim that Benni is schizophrenic?

monkey obama sock i r baboon getting excited talking to himself aka bonobo... here monkey monkey ;)

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