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One of lesser known consequences of climate change

Unitedwestand13

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This is somthing that should be discussed.

In the long list of troubling climate change scenarios, there’s one that gets relatively little attention, but definitely has enormous potential consequences.

It goes like this:

The oceans are getting warmer — they are, after all, where 90 percent of global warming actually ends up. And when they warm up they expand, because that’s what warm water does. This raises our sea levels, but it also has another effect — it reduces the amount of oxygen dissolved in the water. That’s simply physics: Warmer water contains less oxygen.

But it’s worse: If surface water is warmer, it doesn’t mix down as much into the ocean depths any longer. It’s less dense, and so less capable of doing that. That means that oxygen that enters the ocean in its upper layers — either through exchange with the atmosphere, or because it is generated by tiny photosynthesizing microorganisms, called phytoplankton, that hang out up there — won’t mix down into the deep as often.

“What’s happening is, there’s a physical mechanism that impedes the delivery of surface waters into the interior,” said Matthew Long, an oceanographer with the National Center for Atmospheric Research who is lead author of a troubling new study on what scientists call the “deoxygenation” of the oceans. The work appeared in Global Biogeochemical Cycles, co-authored with Curtis Deutsch of the University of Washington and Taka Ito of the Georgia Institute of Technology.

The problem is that marine life needs oxygen. If there’s less of it, that could expand the number of areas sometimes called “oxygen minimum zones” where plants, fish, and other organisms would struggle to survive.

https://www.washingtonpost.com/news...ceans-oxygen-levels-with-severe-consequences/

And here is the link to one of the studies mentioned in the article

Finding forced trends in oceanic oxygen - Long - 2016 - Global Biogeochemical Cycles - Wiley Online Library
 

joG

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Tim the plumber

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This is drivel.

Whilst warmer water holds less oxygen the mechanism for taking oxygen down to the deep ocean is the mixing of cold and warm water at the boundary of the cold and warm oceans. Cold being less than 4c and warm, well you can guess.

When this happens water at 4c reaches it's most dense and sinks. The boundary of the southern ocean is where almost all of this happens. It will still be doing it in the same way in a slightly warmer world.
 

Jack Hays

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The Atlantic is getting colder.

AMO / Opinion
[h=1]The Canary in the Water Column – Atlantic Ocean Heat Content Plummets[/h] Guest essay by David Archibald A few years ago, Professor Humlum, Professor Solheim and myself mounted a meteorological expedition to Svalbard on the island of Spitzbergen, with the attendance of some others. The expedition was armed and sustainable, as reported in WUWT here. In that report, it was noted that “the fall in temperature of…
 

apdst

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It's lessor known, because the warmers know better than to lie too much.
 

polgara

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The Atlantic is getting colder.

AMO / Opinion
[h=1]The Canary in the Water Column – Atlantic Ocean Heat Content Plummets[/h] Guest essay by David Archibald A few years ago, Professor Humlum, Professor Solheim and myself mounted a meteorological expedition to Svalbard on the island of Spitzbergen, with the attendance of some others. The expedition was armed and sustainable, as reported in WUWT here. In that report, it was noted that “the fall in temperature of…

Very interesting link. We were just talking a few days ago about the fact that Pacific ocean is regularly too cold to swim in - is the same going to happen to the Atlantic? Not a good forecast... :shock:
 

Jack Hays

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Very interesting link. We were just talking a few days ago about the fact that Pacific ocean is regularly too cold to swim in - is the same going to happen to the Atlantic? Not a good forecast... :shock:

Atlantic beaches still warmer than the Pacific.
 

jmotivator

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Jack Hays

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[h=2] The Solar Wind may be changing the surface temperature of the North Atlantic[/h]
Could it be the missing key? The solar wind blasts charged particles, electrons, stuff, towards Earth at 500 km a second — that’s one to two million miles per hour. It speeds up, slows down and shifts in direction as it travels past the Earth and has its own magnetic field. The wind speed varies from 300 km per second up to 800 and the impact on Earth changes with our magnetic field and our seasons. You might think this kind of monster flow might have some effect on our climate. But modern climate models are 95% certain that none of this matters. Only crazy people would think that a electrons flying past at a million miles per hour could “do something” to our stratosphere, or ozone, or cloud cover.
Curiously, a recent study shows that when the solar wind is fastest, the North Atlantic is coldest on the surface. The NAO (North Atlantic Oscillation) appears to correlate. The effect is strongest in the northern winter months. Notably the modern expert climate models fail to predict any of the cycles within our major ocean basins. How immature is our understanding of space weather?
Could changes in the solar wind be the driver of the NAO? Will it turn out to be the mechanism for Force N or D?
Fig. 2. Seasonal mean spatial distribution of the correlation between SWS and SST; for MAM (a), JJA (b), SON (c), and DJF (d). The solid dark lines are the boundaries of the regions where the statistical confidence exceeds 99% with the t-test and the dashed dark lines are the boundaries of the regions where the statistical confidence exceeds 95%.


The solar-wind speeds peak about 3 or 4 years after the TSI and sunspots peak in each cycle. That doesn’t suggest the one solar cycle lag we are looking for. Perhaps if we had more data on solar wind speeds we could figure out whether the wind speeds correlated with the TSI in the cycle earlier?
Keep reading →
 

Steve Case

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This is somthing that should be discussed.
The oceans are getting warmer ... it reduces the amount of oxygen dissolved in the water. ... If surface water is warmer, it doesn’t mix down as much into the ocean depths any longer.... The problem is that marine life needs oxygen.

And if you clean the bugs off your wind shield, air resistance should be reduced and your gas mileage should improve
 

Lord of Planar

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And if you clean the bugs off your wind shield, air resistance should be reduced and your gas mileage should improve
Yep.

The difference is rather insignificant.
 
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