<p>Why is so much of the literature I run across regarding global warming concerned with precipitating <span class="math-container">$\ce{CaCO3}$</span> to the ocean floor?</p>
<p>In areas of relatively lower pH, such as the eastern equatorial Pacific:</p>
<p><a href="https://www.nature.com/articles/s41598-019-55039-4" rel="nofollow noreferrer">Surface ocean pH and buffer capacity: past, present and future</a></p>
<p><a href="https://i.sstatic.net/f0fJo.png" rel="nofollow noreferrer"><img src="https://i.sstatic.net/f0fJo.png" alt="enter image description here" /></a></p>
<p>Would not Ekman transport driven upwelling of <span class="math-container">$\ce{Ca+}$</span> ions that remain in solution (due to the extreme depth and cold of the ocean floor in that area) reduce the surface <span class="math-container">$\ce{pCO2}$</span>, hence reduce <span class="math-container">$\ce{CO2}$</span> transport to the atmosphere?</p>
<p><a href="https://i.sstatic.net/2bELJ.png" rel="nofollow noreferrer"><img src="https://i.sstatic.net/2bELJ.png" alt="enter image description here" /></a></p>
<p>Indeed, if anything, it seems geoengineering proposals to reduce atmospheric <span class="math-container">$\ce{CO2}$</span> should be considering exposure of <a href="https://en.wikipedia.org/wiki/Carbonate_platform#Platforms_produced_by_the_%22tropical_factory%22" rel="nofollow noreferrer">eastern equatorial Pacific benthic carbonate platforms</a> to dissolution in the <a href="https://en.wikipedia.org/wiki/Carbonate_compensation_depth" rel="nofollow noreferrer">carbonate compensation depth</a> (CCD) (i.e., below <a href="https://en.wikipedia.org/wiki/Lysocline" rel="nofollow noreferrer">the lysocline</a>).</p>
<p><a href="https://i.sstatic.net/NLCV4.jpg" rel="nofollow noreferrer"><img src="https://i.sstatic.net/NLCV4.jpg" alt="enter image description here" /></a></p>

CC BY-SA 4.0
2023-09-05T10:33:15.207Z
What exactly is pCO2?
Rodrigo de Azevedo
CC BY-SA 4.0
2023-09-06T00:49:50.950Z
CO2 partial pressure.  e.g. if the partial pressure of atmospheric CO2 is less than the partial pressure of oceanic CO2, the ocean will outgas CO2 into the atmosphere.
James Bowery
<climate-change><ocean-currents><carbon-cycle><ocean-models><carbonate>
Since the upwelling of calcium carbonate reduces surface pCO2, why is its dissolution in the CCD below the lysocline of concern?
James Bowery
# Since the upwelling of calcium carbonate reduces surface pCO2, why is its dissolution in the CCD below the lysocline of concern?

(Asked by: username_0 on 2023-09-04)

Why is so much of the literature I run across regarding global warming concerned with precipitating $\ce{CaCO3}$ to the ocean floor?

In areas of relatively lower pH, such as the eastern equatorial Pacific:

[Surface ocean pH and buffer capacity: past, present and future](https://www.nature.com/articles/s41598-019-55039-4)

[![enter image description here](https://i.sstatic.net/f0fJo.png)](https://i.sstatic.net/f0fJo.png)

Would not Ekman transport driven upwelling of $\ce{Ca+}$ ions that remain in solution (due to the extreme depth and cold of the ocean floor in that area) reduce the surface $\ce{pCO2}$, hence reduce $\ce{CO2}$ transport to the atmosphere?

[![enter image description here](https://i.sstatic.net/2bELJ.png)](https://i.sstatic.net/2bELJ.png)

Indeed, if anything, it seems geoengineering proposals to reduce atmospheric $\ce{CO2}$ should be considering exposure of [eastern equatorial Pacific benthic carbonate platforms](https://en.wikipedia.org/wiki/Carbonate_platform#Platforms_produced_by_the_%22tropical_factory%22) to dissolution in the [carbonate compensation depth](https://en.wikipedia.org/wiki/Carbonate_compensation_depth) (CCD) (i.e., below [the lysocline](https://en.wikipedia.org/wiki/Lysocline)).

[![enter image description here](https://i.sstatic.net/NLCV4.jpg)](https://i.sstatic.net/NLCV4.jpg)

**Tags:** climate-change, ocean-currents, carbon-cycle, ocean-models, carbonate

> **Comments:**
> **username_1**: What exactly is pCO2?  
> **username_0**: CO2 partial pressure.  e.g. if the partial pressure of atmospheric CO2 is less than the partial pressure of oceanic CO2, the ocean will outgas CO2 into the atmosphere.  

---

## 0 answers

