Thank you for the updates!

Too bad fir te sound issues. I was stunned when I learned what % of warming goes into the oceans. 94,4% Only 2,3% of it shows up where we live,,,

Thank you for uploading this session.

Rita Solari Inko-Tarih from Nigeria

Dear Dr Feely, Its great work that you are doing to raise the awareness and knowledge on ocean acidification. My background is from the design of marine life support systems for public aquaria. In these systems we are dealing with many hundreds of different species of fish and invertebrates, water chemistry, biology and pathology in communities that have to be maintained for decades. You therefore see the impact of changes in water chemistry to behaviour, or the synergistic effects that are only manifest after on term exposure. On example from the aquaculture industry is that a pH of 7.98 will predispose SeaBass larvae to Norovirus. This results in 100% mortalities in the hatcheries in Greece until we realised the implications of pH. Also as the alkalinity decreases, and pH changes, this impacts on the redox potential and zeta potential of the water which impacts on surface tension and the ability of larvae to stay in the water column. If you allow the pH to drop to pH 7.95, then there is the possibility that all marine larvae could simply fall out of the water column. The next aspect we are working on is the SML layer that regulates gas exchange across the air water interface. The surface sml layer regulates water vapour pressure in the atmosphere, this is controlled by Coccolithophores and marine diatoms which are impacted by pH and water chemistry. If we lose these organisms or if productivity declines any further, then irrespective of co2 partial pressures we could have catastrophic climate change due to an increase in atmospheric water vapour pressure. What I am trying to say is that the consequences of ocean acidification are likely to be much more serious to marine life in the Oceans and climate change than has been previously reported. Magnesium calcite and aragonite have already started to dissolve in the high latitudes and this is going to accelerate. There will be trophic cascade effects and there will be serious implications to atmospheric water vapour which accounts for 75% of all GHGs, this is also implicated to water vapour and cloud nucleation. It is impossible to maintain the LSS in large closed marine systems at a pH of 7.95. The fish will not drop dead, but they are stressed and predisposed to disease and behavioural changes, especially in the larval stages. Under RCP8.5 we will be at pH7.95 by 2045, in the Southern Ocean it may be 2030. This is not the tipping point, I fear that this is actually the end point, the point of no return of system recovery. We need to continue to collect the data and understand the systems, but it is also time for action, we must start to effect change, and this is what we are now working on in GOES. GOES is a citizen science project to map worldwide plankton productivity, microplastic and black carbon pollution. We are also working on the stressors of the marine ecosystem, and how do we remove particulate pollution and lipophilic toxic for every chemicals. You can check out the work of Dr.Craig Down on Oxybenzone as an example of coral toxicity. If you would like to know more about our work, or if we ca become involved with your research, then let me know, [email protected] kindest regards Howard Dryden

💙🌊

Gorgeous! 😊😊😊

Excelente Prof Martin! 👏🏼👏🏼👏🏼

that was amazing💖

The pH scale is log so every whole number is a power/factor of ten. By definition pH is the negative exponent of the hydrogen ion concentration. For instance, pH 9 is 10^-9 or 1 part per billion, 0.000000001. pH 8 is 10^-8 or 10 parts per billion, 0.000000010. To go from pH 9 to pH 8 is factor of 10 or 1,000%!!!! Makes 26% look trivial. Ocean “acidification” of pH 8.2 to pH 8.1 is a decrease in alkalinity equal to 1 ppb of H ions. I’m fairly certain the ocean flora and fauna don’t even notice.

The pH scale is log so every whole number is a power/factor of ten. By definition pH is the negative exponent of the hydrogen ion concentration. For instance, pH 9 is 10^-9 or 1 part per billion, 0.000000001. pH 8 is 10^-8 or 10 parts per billion, 0.000000010. To go from pH 9 to pH 8 is factor of 10 or 1,000%!!!! Makes 26% look trivial. Ocean “acidification” of pH 8.2 to pH 8.1 is a decrease in alkalinity equal to 1 ppb of H ions. I’m fairly certain the ocean flora and fauna don’t even notice.

About 28:25 you mentioned a scenario with oysters in 7.8 pH - isn't that a bit extreme? 😳

0:55 Need software developer? whatsapp +79671570581

I tried to connect to yesterday's webbinar but didn't get it. I hope we get the material in this channel soon.

When will today's (8th September) recorded webinar be released ?