Diurnal and barometric pressure at high tide

DeadDingosDonger's picture
DeadDingosDonger started the topic in Wednesday, 5 Apr 2017 at 10:08am

Can anyone tell me does the barometric pressure rise on the rising tide?
I know that the diurnal is the pressure change between high and low water approx. 3Mba for 6 hrs or .5Mba per hour which allows you to see if there is a change in the weather. You set your barometer and if it has moved more than .5 mba in one hour you know there is an approaching change .

thermalben's picture
thermalben's picture
thermalben commented Friday, 7 Apr 2017 at 5:56pm

Not sure what you mean. "Diurnal" = daily, however ocean tides move around (in their timing) from day to day. 

tubeshooter's picture
tubeshooter's picture
tubeshooter commented Wednesday, 14 Jun 2017 at 9:12pm

I think its the other way round D.D.Donger in that barometric pressure affects sea levels and is called the 'inverted barometer effect'. Sea levels get lower under high pressure and rise under low pressure conditions. How much a rising tide affects the atmosphere I think would be negligible