{"id":294939,"date":"2024-01-14T15:10:19","date_gmt":"2024-01-14T14:10:19","guid":{"rendered":"https:\/\/climatescience.press\/?p=294939"},"modified":"2024-01-14T15:10:22","modified_gmt":"2024-01-14T14:10:22","slug":"king-tides-not-related-to-climate-change","status":"publish","type":"post","link":"https:\/\/climatescience.press\/?p=294939","title":{"rendered":"King Tides \u2014 Not Related to Climate Change"},"content":{"rendered":"\n
\"\"<\/figure>\n\n\n\n

<\/p>\n\n\n\n

Watts Up With That?<\/a><\/p>\n\n\n\n

Brief Note by Kip Hansen \u2014 13 January 2024\u00a0<\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n

What is a King Tide?<\/strong>\u00a0\u00a0<\/p>\n\n\n\n

\u201cA King Tide is a non-scientific term people often use to describe exceptionally high tides. Tides are long-period waves that roll around the planet as the ocean is \u201cpulled\u201d back and forth by the gravitational pull of the moon and the sun as these bodies interact with the Earth in their monthly and yearly orbits. Higher than normal tides typically occur during a\u00a0<\/em>new or full moon<\/em><\/a>\u00a0and when the Moon is at its\u00a0<\/em>perigee<\/em><\/a>, or during specific seasons around the country.\u201d\u00a0<\/em>[ source \u2013\u00a0NOAA \u2013 National Ocean Service<\/a>\u00a0]<\/p>\n\n\n\n

If this is the case, why are there\u00a0<\/strong>so many sites<\/strong><\/a>\u00a0claiming that King Tides are caused by climate change or sea level rise?<\/strong><\/p>\n\n\n\n

Ignorance.  <\/strong>That\u2019s the one-word answer.  But why are they even talking about King Tides?  Pushed by Scripps Institution of Oceanography<\/a>, \u201cthe California King Tides Project <\/a>is a community science program managed by the California Coastal Commission that is focused on highlighting this coastal phenomenon.\u201d   Exactly why?  \u201cKing tides provide a great opportunity to get a glimpse of what our coast may look like as sea-level rises. The water level reached by an extreme high tide today will be the same water level of more frequent moderate tides in the future.\u201d [ source<\/a> ] <\/p>\n\n\n\n

Basically, it is another scare tactic to promote the Climate Change and Sea Level Rise agendas.<\/p>\n\n\n\n

Here\u2019s an example from the news yesterday, from Bill McCarthy of the Bay area News Group, published in the Mercury News<\/a> [may be paywalled]:<\/p>\n\n\n\n

\u201cWith climate change, king tides could be the new normal \u2026. <\/strong><\/em><\/p>\n\n\n\n

King tides are a natural regularly occurring phenomenon as old as time, where\u2013three to four times a year, in conjunction with the moon\u2019s cycles\u2013the tide rushes in further and with more power than normal. They generally occur in the winter, usually January and December. Low-lying areas are flooded, and the water poses a minor nuisance at best, a heavy flooding threat at worst.<\/em><\/strong><\/p>\n\n\n\n

In Marin, a popular boardwalk running through a tidal marsh will be covered with water. Narrow beaches become inaccessible. Underpases might flood.<\/em><\/strong><\/p>\n\n\n\n

But as climate change pushes sea levels higher, the flooding apparent during king tides could soon become permanent. Current projections estimate that the Bay Area could rise by approximately two feet by 2050, which would put our permanent shoreline at the water level seen during king tides.\u201d<\/em><\/strong><\/p>\n\n\n\n

King Tides will always be King Tides by definition.  They will always be exceptionally high compared to normal tide levels \u2013 that\u2019s why they have a special designation.<\/p>\n\n\n\n

More properly, King Tides are perigean spring tides<\/a>.  They don\u2019t just happen in the Spring season. \u201cOften between 6-8 times a year, the new or full moon coincides closely in time with the perigee of the moon \u2014 the point when the moon is closest to the Earth. These occurrences are often called \u2018perigean spring tides.\u2019 High tides during perigean spring tides can be significantly higher than during other times of the year.\u201d<\/em><\/p>\n\n\n\n

How much higher?<\/strong><\/p>\n\n\n\n

That depends on the exactly location, the date and the year all taking into account the cycles of the Earth and the Moon. <\/p>\n\n\n\n

Here is\u00a0San Francisco, California<\/a>, (the major city of \u201cthe Bay Area\u201d):<\/p>\n\n\n

\n
\"\"<\/figure>\n<\/div>\n\n
\n
\"\"<\/figure>\n<\/div>\n\n\n

The first thing you will notice is that the tide charts have a \u201cfunny\u201d shape \u2013 this is called a \u201cMixed Semidiurnal tide cycle. An area has a mixed semidiurnal tidal cycle if it experiences two high and two low tides of different size every lunar day.\u201d<\/em><\/p>\n\n\n\n

Oh, what\u2019s the matter?  You don\u2019t see a huge dangerous looking King Tide?  Correct \u2013 the King Tide happened, it was about 1 foot higher than the more normal Mean Higher-High Water (MHHW) for this tide station, which is 5.84 feet above Mean Lower-Low Water. <\/em><\/p>\n\n\n\n

This graph will give you a better view:<\/p>\n\n\n

\n
\"\"<\/figure>\n<\/div>\n\n\n

You can see not only the higher highs but the lower lows as well, under the influence of the Moon.\u00a0 Here is last year\u2019s January King Tide, at 7.68 feet:<\/p>\n\n\n

\n
\"\"<\/figure>\n<\/div>\n\n\n

which was almost a foot higher than this year\u2019s. <\/p>\n\n\n\n

And Climate Change?  Not related at all. <\/p>\n\n\n\n

The only factor that affects King Tides is the mean sea level at the location in question. \u00a0And for the coast of California, sea level rise isn\u2019t much of a factor.<\/p>\n\n\n

\n
\"\"<\/figure>\n<\/div>\n\n\n

About four inches in 50 years,  right in line with the expected 8-10 inches per century of global sea level rise as measured by tide gauges around the world.<\/p>\n\n\n\n

The local mean sea level will control the height and range of the normal tides.  As mean sea level in the Bay Area rises, and it will, slowly and inexorably, at about two millimeters a year, the King Tides will advance the same small amount each year.<\/p>\n\n\n\n

# # # # # <\/p>\n\n\n\n

Author\u2019s Comment:<\/p>\n\n\n\n

Journalists working in today\u2019s media seem to be simply incapable of thinking for themselves or of actually doing any fact-checking or back-grounding when it comes to anything that touches on climate, weather, sea levels, storms, hurricanes and all that.  They just parrot talking points from the climate crisis agenda.<\/p>\n\n\n\n

Not to worry, King Tides are just perigean spring tides<\/a>.  Those locations adversely affected by King Tides are too close to local mean sea level and need to be raised or protected.  And that\u2019s all.<\/p>\n\n\n\n

Thanks for reading.<\/p>\n\n\n\n

<\/p>\n","protected":false},"excerpt":{"rendered":"

Journalists working in today\u2019s media seem to be simply incapable of thinking for themselves or of actually doing any fact-checking or back-grounding when it comes to anything that touches on climate, weather, sea levels, storms, hurricanes and all that.\u00a0 They just parrot talking points from the climate crisis agenda.<\/p>\n","protected":false},"author":121246920,"featured_media":294950,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_coblocks_attr":"","_coblocks_dimensions":"","_coblocks_responsive_height":"","_coblocks_accordion_ie_support":"","_crdt_document":"","advanced_seo_description":"","jetpack_seo_html_title":"","jetpack_seo_noindex":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"Journalists working in today\u2019s media seem to be simply incapable of thinking for themselves or of actually doing any fact-checking or back-grounding when it comes to anything that touches on climate, weather, sea levels, storms, hurricanes and all that.\u00a0 ","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":false,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2},"jetpack_post_was_ever_published":false},"categories":[1],"tags":[691818056,691826268,691826270,691826269,691826271],"class_list":{"0":"post-294939","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","6":"hentry","7":"category-uncategorized","8":"tag-climate-change","9":"tag-king-tides","10":"tag-noaa-national-ocean-service","11":"tag-perigean-spring-tides","12":"tag-sea-level-rise-agenda","14":"fallback-thumbnail"},"jetpack_publicize_connections":[],"jetpack_featured_media_url":"https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2024\/01\/0pexels-emiliano-arano-1295138-scaled-1.jpg?fit=2560%2C1440&ssl=1","jetpack_likes_enabled":true,"jetpack_sharing_enabled":true,"jetpack_shortlink":"https:\/\/wp.me\/paxLW1-1eJ5","jetpack-related-posts":[{"id":201462,"url":"https:\/\/climatescience.press\/?p=201462","url_meta":{"origin":294939,"position":0},"title":"Grading The NOAA Arctic Report Card","author":"uwe.roland.gross","date":"25\/05\/2022","format":false,"excerpt":"NOAA claims that sea ice is disappearing, the Greenland ice sheet is melting and this is causing sea level rise and extreme weather. 2021 Arctic Report Card reveals a (human) story of cascading disruptions, extreme events and global connections Arctic sea ice extent is right at the 1981-2010 median. 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