we like it when it is windy: lunchtime chat: refining knowledge on ocean tides - tidal ranges for Ireland and worldwide, tide timing pattern/periods and tidal bores on rivers.

Tidal ranges

Ireland has pretty decent tidal range Dublin from 1m up to 5m (average 3m) tide-forecast.com/..Dublin-Ireland.. and Shannon marine.ie/../tidal-flows-around-ireland Shannon Estuary 4.5m-5.5m average range, average world tidal range is 0.6m open ocean. wikipedia.org/..Tidal_range ../M2_tidal_ranges.jpg

Thanks to wikipedia. Tidal ranges around the world. The M₂ tidal constituent, peak amplitude indicated by color. White lines are cotidal lines spaced at phase intervals of 30° (a bit over 1 hr).^[8] Amphidromic points are the dark blue areas where the lines come together.

Largest tidal ranges in world:

#1 Bay of Fundy, Canada (16m average)

#2 Severn Estuary, UK (15m average)

tides.today/../where-are-the-worlds-largest-tidal-ranges?

noaa.gov/faq.html#08 Q: Where are the highest tides? list of locations

See also: https://www.weather.gov/jetstream/fundy_max Bay of Fundy: The Highest Tides in the World

Tidal patterns/periods

Tidal pattern/period is diurnal following Moon influence around alot of the world but water sloshes about giving other different tide periods (as well as tidal bores), e.g. look at chart of Kinvara in Galway bay: http://www.marine.ie/site-area/data-services/real-time-observations/tidal-observations-imos clickable chart for Ireland.

INFO CHART

See world chart here Diurnal/Semidiurnal/other tidal phase patterns: http://canuck.seos.uvic.ca/SEOS/EOS110/tides/tides.html

Tidal bores (on rivers mostly, and a bit on harbour/estuaries

Does every river have a tidal bore at some location ? Maybe minor ones. It is said that tidal bores are not that common around the world. About 100 rivers around the world have a tidal bore.

Tidal bores are pretty cool. They can be stronger on spring tides or if wind/weather conditions raise sea level at river mouth. I understand they happen mostly on rivers with long slow mouth where river joins the sea https://education.nationalgeographic.org/resource/tidal-bore

The Bay of Fundy and Severn Estuary both have tidal bores.

https://ntslf.org/about-tides/tidal-river-bores The Severn, The Dee and the Mersey, the Qiantang (Hangzhou in China - largest tidal river bore in the world)

"Human activity can change or even remove tidal bores. A century ago, the Seine River in France had a strong tidal bore, called the mascaret. Years of river management (canals, dams, irrigation systems, dredging) eliminated the mascaret. Before the French began managing the Seine, the unpredictable mascaret was responsible for the loss of hundreds of ships. The wave would rush up the river, upsetting cargo ships and destroying docks."

Some significant tidal bores - some have names. https://en.wikipedia.org/wiki/Tidal_bore Info collected mostly from wikipedia there but filling in some extra info:

Asia: China, India and neighbours, Malaysia and Indonesia and neighbours:
The silver dragon on the Qiantang River, China worlds largest bore up to 9m youtube:Redbull Silver Dragon dangerous surf wave
The Benak on the Lupar River, Malaysia. Pesta Benak Festival in Sri Aman town in Sarawak. youtube:waves of Pesta Benak 2011 youtube:shiny fancy produced video
on the Sadong River, Sarawak, Malaysia. youtube:Benak of Gedong at Sadong River bore
The Bono "true" on the Kampar River, at Meranti Bay, Pelalawan, Indonesia. youtube:surf Bono
The Hooghly on the Ganges–Brahmaputra, India and Bangladesh
on the Indus River, India & Pakistan
on the Sittaung River, Burma
Australia:
Styx River, Queensland - "Crocodiles [and sharks/other predators] swim behind the Styx River bore in Queensland, Australia."
Daly River, Northern Territory
Ord River, currently has disappeared after channel was flushed with large flood.
Papua New Guinea:
Fly River^[21]
Turama River
UK:
The Severn bore on the River Severn, Wales and England, up to 2 meters (7 ft) high river surfing birthplace maybe youtube:surfing the Severn bore
River Mersey. The second highest tidal bore after the Severn bore, up to 1.7 meters (6 ft) high. The bore tends to form around the Manchester Ship Canal. youtube:swan surf Mersey bore
The Aegir on the Trent River, England up to 1.5m high.
The Aegir on the River Ouse, Yorkshire
The Arnside Bore on the River Kent
The Eagre bore on the River Nene.
Ireland:
River Shannon, up the Shannon Estuary to Limerick youtube:River Shannon bore wave from Barrington's Pier, Limerick on 21st September 2013. not bore but tidal youtube:surfing tidal/standing wave Limerick City
France:
Historically, la barre on the Seine River, France.
un mascaret is a general name for tidal bores in France
Bore in the Gironde, the Garonne and the Dordogne map:Gironde Gironde-tourisme.fr/mascaret "party wave" youtube:surfers, suppers, kayak, canow with outrigger
Bay of Mont-Saint-Michel
Vilaine, locally named le mascarin
Germany:
Eisbach river standing wave in Munich
South America:
The pororoca on the Amazon River, Brazil up to 4m and can go 200km/800km? up the Amazon. Surfing the Pororoca is fun but dangerous debris and fauna (pirahanas, crocs, ..) youtube:surfing the Pororoca
Araguari River in Brazil. Very strong in the past, it is considered lost since 2015
Orinoco River in Venezuela
US (and Mexico):
The Turnagain Arm of Cook Inlet, Alaska. Up to 2 meters (7 ft) and 20 km/h (12 mph).
Historically, the Colorado River had a tidal bore up to 6 feet, that extended 47 miles up river.
The Cook Inlet in the U.S. state of Alaska experiences strong tidal bores. Bears and eagles wade into the water hours after the wave passes to pick up fish along the banks.
Canada: "With the Bay of Fundy having the highest tidal range in the world, most rivers draining into the upper bay between Nova Scotia and New Brunswick have significant tidal bores." youtube:bore on the high tide Moncton, New Brunswick youtube:Weird Places: Bay of Fundy new word: seiching Google maps:Bay of Fundy
The Petitcodiac River (Chocolate River) formerly had the highest bore in North America at over 2 m
The Shubenacadie River in Nova Scotia.