Ralph Diaz wrote: <snip> "...Even that "straightforward" movement is tricky enough because of the bottom surface of the passages involved. To all of this you have to add the effects of wind, barometric pressure, any fresh water flow, phases of the moon, relative location of the moon in its orbit (perigee vs. apogee)." Quick question about the barometric pressure (bp) aspect of this. I'd heard before that bp played a role in currents, but I'd always assumed it was solely due to the winds that result from changes in bp. Does bp (or *changes* in bp) produce an effect on currents aside from the wind? (I'm just trying to get a better handle on the underlying physics.) Evan Dallas Woodinville, WA *************************************************************************** PaddleWise Paddling Mailing List - Any opinions or suggestions expressed here are solely those of the writer(s). You must assume the entire responsibility for reliance upon them. All postings copyright the author. Submissions: PaddleWise_at_PaddleWise.net Subscriptions: PaddleWise-request_at_PaddleWise.net Website: http://www.paddlewise.net/ ***************************************************************************
Yep, high pressure tends to flatten seas, low the opposite. Witness the storm surge during a hurricane. It is an effect primarily of the low pressure in the center of the storm. Dave G. At 10:00 AM 12/23/2002 -0800, Evan Dallas wrote: >Quick question about the barometric pressure (bp) aspect of this. I'd >heard before that bp played a role in currents, but I'd always assumed it >was solely due to the winds that result from changes in bp. Does bp (or >*changes* in bp) produce an effect on currents aside from the wind? (I'm >just trying to get a better handle on the underlying physics.) > >Evan Dallas >Woodinville, WA *************************************************************************** PaddleWise Paddling Mailing List - Any opinions or suggestions expressed here are solely those of the writer(s). You must assume the entire responsibility for reliance upon them. All postings copyright the author. Submissions: PaddleWise_at_PaddleWise.net Subscriptions: PaddleWise-request_at_PaddleWise.net Website: http://www.paddlewise.net/ ***************************************************************************
> Ralph Diaz wrote: <snip> "...Even that "straightforward" movement is > tricky enough because of the > bottom surface of the passages involved. To all of this you have to add > the > effects of wind, barometric pressure, any fresh water flow, phases of the > moon, relative location of the moon in its orbit (perigee vs. apogee)." > > Quick question about the barometric pressure (bp) aspect of this. I'd > heard before that bp played a role in currents, but I'd always assumed it > was solely due to the winds that result from changes in bp. Does bp (or > *changes* in bp) produce an effect on currents aside from the wind? (I'm > just trying to get a better handle on the underlying physics.) > > Evan Dallas > Woodinville, WA High pressure tends to depress the level of the water and therefore affects the height of tides. Low pressure the opposite. And, as you indicate, barometric pressures also affect winds. ralph diaz *************************************************************************** PaddleWise Paddling Mailing List - Any opinions or suggestions expressed here are solely those of the writer(s). You must assume the entire responsibility for reliance upon them. All postings copyright the author. Submissions: PaddleWise_at_PaddleWise.net Subscriptions: PaddleWise-request_at_PaddleWise.net Website: http://www.paddlewise.net/ ***************************************************************************
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