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Impressive-Sort223 t1_j5f4uus wrote

How are we supposed to tell what changed?

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mydriase OP t1_j5f51ae wrote

well ... there are colors ... there is a key to understand the colors. the rest is up to you :)

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Impressive-Sort223 t1_j5f58pk wrote

I understand that there is a key. I see that the green means that there is acidity. How is that significant if I cannot see before it was acidic? This is just the end result. We need to see when it started in 1910 and the end result in 2010.

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mydriase OP t1_j5f5bja wrote

No, -0,2 means it decreased by 0,2 between the two dates

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Square_Tea4916 t1_j5fjp6y wrote

Interesting how it's less acidic in the middle. Wonder what it would look like with a Shipping Route Overlay.

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mydriase OP t1_j5fkf3i wrote

So the logic behind this map, as far as I know it, is that, from a purely chemical point of view, cold water is more acidic since the amount of CO2 that can dissolve into water is inversely proportional to the temperature.

So, this would mean cold water becoming warmer,because of climate change, should be less acidic. But then, in reality, more biological processes take place in warmer waters. These processes releases CO2 and acids. So water ends up getting more acidic

This degree of change is exacerbated by the fact polar waters are warming up much faster than the others on earth

That’s why it’s bright yellow, others who didn’t change so much are likely to not have warmed so much (or other reasons I don’t know)

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Significant-Return21 t1_j5fol6k wrote

Those darker regions along coasts and equator reflect upwelling where cold water is transported to the surface.

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mydriase OP t1_j5fp6kk wrote

Thanks. I thought upwelling was bringing water along the coasts of Peru / Chile and Nambia ? Is it also happening in the middle of nowhere ?

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mydriase OP t1_j5fleyf wrote

Also, I’ll add some patterns across oceans are currents, like you see in the northern Atlantic Ocean. The cold waters on the east coast of Canada are colder than those coming from warmer regions, so they get this sped up acidification effect…!

Also, it doesn’t show on the map so well but coastal waters tend to have a higher pH because of human activity and river discharge (bringing waste waters)

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Square_Tea4916 t1_j5fny1o wrote

Thanks, this is awesome! I was kind of shocked seeing the water near the Panama Canal wasn't as acidic. Maybe it does have more to do with current patterns.

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mydriase OP t1_j5fob8m wrote

The data resolution is very coarse so maybe it is very acidic locally (I haven’t read anything about ship lines and acidity though !) and the data doesn’t allow us to see it …

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MagicJava t1_j5iis8y wrote

The middle could be more acidic and we wouldn’t know from this map. Just shows the change

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Dazzling_Increase_48 t1_j5i9gdr wrote

We should also consider the water currents , which transport from one area to other

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il_duomino t1_j5ilvxj wrote

In the grand scheme of things, this is bad I guess. I know very little about ocean aciditiy. This change is due to pollution and it changes the environment for sea life. Does it also affect weather, climate, temperatures?

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Rugfiend t1_j5fgtjy wrote

Sadly, this does nothing for armchair expert denialists - the implications are meaningless to the clueless.

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mydriase OP t1_j5fjknm wrote

Agreed. I will post the same map with a comprehensive overview of the topic, with more info and figures. But since this sub seems to appreciate simpler maps (because the map I made is a 3-4 mns read and no one has time) I’m posting this in the meantime

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Rugfiend t1_j5fkw45 wrote

I certainly appreciate the post as is.

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mydriase OP t1_j5fl14x wrote

Thanks a lot. I’ll keep you posted for the more interesting version

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Glittering_Line_7643 t1_j5jgkcc wrote

I read it as the evolution of audacity in our oceans

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mydriase OP t1_j5jirj9 wrote

How dare they, getting more acidic ? Tsssk the audacity

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Lyrebird_korea t1_j5k5wcn wrote

Oceans are not acidic, they have a pH > 7 and that is not going to change any time soon. Your title is misleading.

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mydriase OP t1_j5k7a4v wrote

WTF ? I am not saying they’re acidic. I’m saying they are getting more acid. The pH has dropped by 0,2 during the period shown here. This means +30 in acidity. Not acid yet but it is definitely getting more acidic

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Lyrebird_korea t1_j5kanaz wrote

It is not getting more acidic. It is getting less alkaline.

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mydriase OP t1_j5kggxg wrote

You’re right, but at this point everyone (the researches as well I think) say this. It’s the common way to designate the topic. It’s also simpler and more understandable that way

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mydriase OP t1_j5f4tj0 wrote

For this map I used the free data on NOAA (national Oceanic and Atmospheric Administration) and used QGIS / adobe illustrator process the data.

I will post a much more elaborate map tomorrow, adding a ton of extra information but wanted to share this simpler, straight forward version map of the topic.

In the meantime, you can find more cool maps, articles and even photographs on my website where I write about topics with a geographical point of view (hence the maps).

cheers :)

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