On Aug 25, 3:26*pm, "Russel Sprout" wrote:
"Ian Sutherland" wrote in message

. uk... I have a friend who is a keen fisherman. The lake where he often goes is
run by a man who told him that high atmospheric pressure can push the
oxygen out of the water and thus adversely affect the fish.

I would have thought that increasing the atmospheric pressure would
increase the dissolved oxygen content. *A much bigger effect would be
caused by an increase in temperature of the water (reducing solubility)..

All true Ian, but I suppose as wind is usually light or calm with high
pressure, there will be less transfer of gasses at the water/air interface.
On the other hand it is more likely to be summy with high pressure, so the
aquatic plants may redress the O2/CO2 balance somewhat..

There is a wave that passes over the planet with the dawn and sunset.
And fish feed at those times.

With high atmospheric pressure, the weather tends towards fine and
that is poor fishing for some of the game fish.