What Causes the El Niño Southern Oscillation?

There's a lot of explanations of what El Niño is and the consequences of it's occurrence. But few if any resources adequately tackle how it occurs in the first place. What would compel the ocean to act against this positive feedback loop? What causes this positive feedback loop in the first place?

To answer these questions we must look at how fluids behave on a rotating sphere and how that influences the thermocline.

Sources:
The El Niño-Southern Oscillation Phenomenon - Sarachik, E. & Cane, M.

Higher frequency of Central Pacific El Niño events in recent decades relative to past centuries:

[katinkax]

Sehr verständlich! Die Visualisierungen sind wirklich toll gemacht!

[akiraak]

see you back days when this channel gets millions of subscribers

Thanks man

[bertruss]

Congratulations
Not only your channel is wonderful. You are also the first English speaking Youtuber to accurately pronounce the ñ in Niño

[EduNauta]

Impressive quality, may it get blessed by the algorithm

[PaulPukite]

Good. Notice at 5:23 the appearance of Tropical Instability Waves which always have a wavelength that is 1/15 of that of the main El Nino dipole. This is one of the keys for understanding the dynamics

[nathansamuelson]

Another interesting impact of el niño is on ocean ecosystems. Normally the cool upwelling carries nutrients from the ocean floor to the coast, feeding the local ecosystems. But when these currents get disrupted you not only get a massive change in weather but a crash in food chains as well.

[mariajacinta]

Splendid Explanation ! Thank you, ever so much.🎉

[NextLevelFarmerDotCom]

Super cool explanation with digital animation.

[SarahBouchard-jj]

thank you for this description and graphics; really helpful

[willo]

Great video! Now I feel like I have a good handle on what’s going on.

[DBT]

Cool and clear explanation!
Thanks! 👍

[johntillman]

What causes the trade winds to weaken and even reverse? Some say changes in UV flux with the solar cycle, which affects making and breaking of stratospheric ozone, hence air pressure.

[brianpj]

Why am I only finding your channel now?!?!

[TheSdzfr]

Great presentation, Thankyou.
Can you explain: What is the biological impact of ENSO?
I read it somewhere that the upwelling in East Pcific, combined with the drainage of rivers from the Andes caused Algal blooms leading to deaths of Marine Mammals.
Now in case of La-Nina events, there is more upwelling, which could lead to Whales RIP.
In case of El-Nino events too, there will be rain in South America causing Rivers flowing with lots of Iron and causing Whales RIP.
So what is worse for the Mammals of the Pacific, El-Nino or La-Nina?

[sriram_raghavan]

How do you make these nice animations ?

[accessaryman]

mature and natural weather at it finest, our climate is what it is, for ever changing on it natural cycle, we just simply need to adapt to it and live with in its glory

[Aeolium]

I thought Low pressures were correlated with cold weather, why the inversion here?

[REDandBLUEandORANGE]

I thought that warm things have higher pressure because they are expanded in the same volume

[jimbob-jnjz]

I thought high temperature caused high pressure and low temperature cause low pressure but you have the opposite?

[alexanderconrad]

The first model is wrong. Computing power matters only when based on the needed data.