Eldon hole ice

[Pitlamp]

Toby.w wrote:

"Ahhh interesting, so it will probably be gone quite soon then given this week's weather"

It depends to what extent the cave draughts, I guess.
I don't remember noticing much of a draught when I've been there but if my own visits coincided with the temperature outside being similar to cave temperature, there would be no reason for there to be a draught. (Unless it was barometric [i.e. related to atmospheric pressure changes] rather than convectional.)

 

[Fulk]

It seems counter intuitive to suppose that warm air descends, but I guess the explanation is that if there is a lower entrance, cold air (further down the system) will tend to flow out of the bottom as it sinks, dragging warm air down with it . . . which implies that there must be a lower entrance to Eldon Hole – ?

 

[Cantclimbtom]

It seems counter intuitive to suppose that warm air descends, but I guess the explanation is that if there is a lower entrance, cold air (further down the system) will tend to flow out of the bottom as it sinks, dragging warm air down with it . . . which implies that there must be a lower entrance to Eldon Hole – ?

There must be.. but it's blocked.
The water cutting that slot had to have gone somewhere.. but WHERE??

 

[Pitlamp]

It seems counter intuitive to suppose that warm air descends, but I guess the explanation is that if there is a lower entrance, cold air (further down the system) will tend to flow out of the bottom as it sinks, dragging warm air down with it . . . which implies that there must be a lower entrance to Eldon Hole – ?

Yes - quite possibly Peak Cavern, although there is no known cavers' connection at present.
But air can get through chokes of course.

I know what you mean about warm air generally ascending but your explanation here of why it can sink down a shaft seems fine to me. It's a reversed chimney effect, as air in the chimney / shaft is cooler than the air ouside the house / cave system.

It's the same reason why people with wood burning stoves may notice a sooty smell inside the house in really hot weather.

 

[pwhole]

Windle and Rush Mine, on the eastern edge of Eldon Quarry (shaft gone sadly), went down over 200m from the surface, apparently to flowing water, possibly the P8-Speedwell stream/sump route, reputed to pass under, or close to the pothole. I was at the top of a deep shaft (but inside a chamber rather than surface) two weeks ago and the air was most definitely going down that.

 

[Loki]

Trolling on the forum is a bannable offence. Please don't do it.

Trolling on ukc? Never! Watch out - you know who you are.

 

[mikem]

Hell, it was only a month agp

 

[John tapeworm]

It's melting fast, this is how it looked this lunchtime, if you want to play in the snow, don't leave it too longView attachment 15891