The Great Barrier Reef Climate Crisis 

Thank you.

Very informative Peter. Your presentation should be used as an essential education tool in schools.

Keep up the great work Peter, you are a legend !

Interesting slant on what maybe happening with corals around the world. I have seen some beautiful coral reefs in equatorial regions and have often wondered if a little bit warmer waters might just cause/allow corals to spread further away from the equator.

Thank you for this. Clear, simple, logical. It’s no wonder they come after you.

Well done Dr Peter Ridd!

Well that was an awesome way to spend a cpl hours. Up to date now, keep em up doc :)

Still the best and most important video of reef rebels.👌

Just learning that coral bleaching is a natural phenomenon. Thanks mate . Weird times .

Cool thanks mate

Thanks Dr. Ridd.

Thank you Peter. Always informative. > I am being a little lazy by asking this without looking more deeply into the research myself. A common Doom and gloom argument is ocean acidification from CO2 absorption will destroy the reef.. We know that water, rain and the ocean is the largest collector of atmospheric CO2 and readily turned into carbonic acid. Many paint this as a devastating proposition for the GBR. We also know that lime/calcium will easily react with H2CO3 to produce calcium carbonate which the polyps use for the corral home creation. Many of our northern rivers and streams have quite high concentrations of calcium compounds running off into coastal areas inside of the GBR. My question: Are there enough concentrations of calcium compounds such as calcium hydroxide making it to the reef regions to react with the carbonic acid in the coastal GBR waters to produce beneficial CaCO3 for the reef? Keeping in mind that fresh and salt water does not easily mix, and our coastal currents tend to have a slight close to shore northerly flow. Obviously our GBR must obtain the billions of tones of CaCO3 from somewhere. So I guess I am asking does the amount of calcium compounds from our rivers offset the oceanic H2CO3 concentrations in coastal reef (GBR) regions and bearing that in mind does ocean acidification have a noticeable negative, or positive impact on the reef? > P.S. Locals such as myself were quite aware of small patches of bleaching on the reef well before 1980 as well as spawning events, although we did not have an understanding of these events as we do today.

We need to get you on Triggernometry or Prageru. God Bless you Dr. Ridd.

Dr. Ridd, why is there so little bleaching in raja ampat? Is it the huge range in temperature the water there experiences every day? What needs to be done to preserve the coral triangle and to keep it safe/help it recover?

Bravery to to say the truth (which sad this is the case).

This was an amazingly good presentation. Do you know anything about the coral reefs of south Florida and Caribbean? I've seen some stuff claiming the amount of dead coral there is catastrophic, but in today's cultural fetish for catastrophism it's hard to trust the media.

octane really?

Is 'coral ivf' effective?

Good to see some common sense

No, it's the average increase. The problem is long hot periods which correlate with the minor increase in average temperature.

So you're saying it's donaldtrumpdioxide?

Our coral reefs are dying. It is only partly due to climate change. Any diver knows this very well because you can SEE IT WITH YOUR OWN EYES (as in get out of your house and look for yourself). I am not sure who this guy is or what qualifications he has, but it is scientifically inaccurate to assume that in the span of human timeframes that the coral reef will return to what it was say in the 1960s. At any rate, though, I'm being a downer for the nothing-to-see-here climate change deniers who watch this stuff (I thought that crowd was keeping their mouth shut more nowadays, but I see they won't disappear until the bitter end). So carry on with your climate change denial! I know you need it to face your kids.

Nice cherry picking there Peter. Still getting paid by Gina?