Is the severity of narcosis greater when diving cold water?

[Scubagermany]

Shallow breathing will lead to higher CO2 levels!

Only if you are panting in such a way that you are using exclusively or mostly your pulmonary dead space.

 

[Angelo Farina]

In my experience with deep air, definitely YES.
In cold alpine lakes, such as Garda or Maggiore, I got severe hits at just 24-30 m.
In the Mediterranean, which is warmer but not tropical, I usually had narcosis only at 45+ meters, around 40 if diving in winter.
At Maldives, when there were no depth limits, we did dive routinely at more than 50 meters with no narcosis.
However, low water temperature has a secondary relevant effect, translating in larger muscular effort due to heavier suit and equipment.
At Maldives we were basicaly "skin diving": no suit, no BCD, just long snappy fins, mask and a single tank...
Moving was effortless, and this contributed certainly in reducing CO2 production. CO2 is a powerful narcotic...

 

[clownfishsydney]

I am not even going to respond to OP as he/she has posted numerous questions that should not even be asked by an unqualified diver.

 

[Wibble]

Hyperventilation will lead to lower CO2 levels!

And a very short dive.

Hyperventilation is a symptom of hypercapnia (and IPO/IPE -- Immersion Pulmonary Oedema). On a rebreather, hyperventilation can cause CO2 breakthrough. Hyperventilation underwater is a bad thing, possibly requiring rescue.

 

[tridacna]

Some people have used the word ‘bot’ in this thread. Is the word ‘troll’ no longer de rigueur?

 

[lexvil]

Some people have used the word ‘bot’ in this thread. Is the word ‘troll’ no longer de rigueur?

It comes down to intent, a bot is just doing what it’s told and doesn’t know better.

 

[Bob DBF]

It comes down to intent, a bot is just doing what it’s told and doesn’t know better.

A minion would be the human version of a bot then?