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 :)

How are we supposed to tell what changed?

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

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.

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

Ahhhhh pardon my misunderstanding and thanks for helping me see that.

No problem ! I hope it won’t be confusing overall

Nope, very interesting stuff! Thanks for sharing.

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

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

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

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)

I certainly appreciate the post as is.

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

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)

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.

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 …

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

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

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

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?

I read it as the evolution of audacity in our oceans

How dare they, getting more acidic ? Tsssk the audacity

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

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

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

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