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Rees Erwin - Saturday, January 21, 2023
Showing posts with label Perigean - Spring tide (New Moon). Show all posts
Showing posts with label Perigean - Spring tide (New Moon). Show all posts
January 22, 2023
King Tide, Chinese New Year & Rees Erwin
~
photo by Rees Erwin
The term king tide is generally used to describe the highest tides of the year. Tides are caused by the gravitational forces of the moon and the sun. Even
though both the sun and moon influence our tides, the moon’s
gravitational pull is about twice as strong than that of the sun.
Therefore, we experience different tidal forces as a result of how far
away the sun, moon, and earth respectively are from each other. When the
earth, moon, and sun are near alignment we get a new moon (moon between
the sun and earth) . . .
oceanservice_noaa.gov
. . . and full moon (earth between the moon and sun).
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oceanservice_noaa.gov
This
alignment causes an increase in the gravitational pull roughly twice a
month called ‘spring tides’. The moon’s closest position to the earth is
called a ‘perigee.’ When a full or new moon coincides with perigee we
get perigean spring tides. These are slightly larger tidal events that happen about three or four times a year.
For every super high tide of these events there is an equally low tide. This occurred yesterday during the new moon and the Chinese New Year.
Rees Erwin and a group of his friends took a dinghy out into the middle of the bay where a patch of land emerged from the waters of the bay to temporarily form an island and he photographically captured the event quite eloquently.
photos by Rees Erwin
Net links:
Best Things California ~ Walk with the King Tide Along the Embarcadero
Rees Erwin
Sea Grant California ~ King Tide
Thanks for the fantastic experience, Rees!
Styrous® ~ Sunday, January 21, 2023
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