Author Topic: Meteorological tsunamis (death waves / seiche's / milghuba ) - effective cause  (Read 25057 times)

electrobleme

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Meteotsunamis (seiche's / milghuba) - caused by atmospheric pressure changes or by-product?



Seiche's are sudden waves or rises in the sea level. They are thought to be created by atmopsheric conditions. A sudden change in the pressure thought to push the wave or mass of water towards the land.

These waves can cause severe flooding and loss of life. They are sometimes known as 'deathwaves' and in Malta they are known as milghuba. This originates from the Maltese verb 'laghab' which means 'play' and the wave is fittingly called the 'play of the sea'.

The sea is a great conductor of electricity and the part of the Global Weather Circuit involves the potential difference point of the land and the sea. The sea is logically thought to either affect the local magnetic field or help produce it. This seems reasonable with the Telluric and Sea Currents flowing around the world.  Are sea currents, rip tides etc just natural electrical current flows, similar to electricity in a wire but flowing in the salt water? Would this explain why you get sudden hot spots of water? Why Malta has strong currents when in reality it should not as it has virtually no tides.

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Study of Seiche Oscillations

A most remarkable feature in the sea level signals observed in Malta consists of a band of high frequency signals with periods ranging from several hours to as low as a few minutes. These non-tidal short period sea level fluctuations are an expression of a coastal seiche, known by local fishermen as the 'milghuba' . This phenomenon has now been observed to occur all along the northern coast of the Maltese archipelago and manifests itself with very short resonating periods of the order of 20 minutes...

Analysis shows that weak seiching is present uninterrupted and appears as a background 'noise' on the tidal records. During random sporadic events the seiche oscillations can however become greatly enhanced. The maximum range measured in Mellieha Bay reached 1.1m. The seiche is often big enough to mask completely the small astronomical tide.These large-amplitude sea level oscillations are accompanied by remarkable currents that are triggered by the sloshing water masses. These currents are comparable in size to those generated in coastal areas characterised by tidal forcing.

While these seiche induced currents can be an important means for the flushing of coastal inlets and harbours, they can on the other hand be dangerous to navigation. - Physical Oceanography Unit - University of Malta


Effective Cause

Atmopsheric changes are thought to create seiches / meteorological tsunamis. What if atmosperic pressure is partially influenced by the electromagnetic effects of the currents in the sea or even just electromagnetic events in it? Maybe the atmosperic change is a by-product of an electromagnetic effect acting on and through the water, possibly slightly "levitating" the water. The atmosperic change maybe an effect not the cause.

Seiche's have been studied as standing waves and they may be that but what produces the ossilation? In Malta they are shown to be a constant background noise or frequency so the Seiche (Milghuba) is always there and then receives more energy to suddenly create its surge wave.

Nature uses waves/frequencies to transfer energy. Are normal waves, Seiche and Meteotsunami a transference of energy? Although we see the results of Seiche's there are also internal Seiche's that are far more powerful. These may provide a clue as to natures purpose of these  waves.


Internal seiches - bigger and badder

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Lake hydraulics - Internal seiches

Internal seiching results from thermal stratification. The layers separated by the thermoclines oscillate relative to one another. Observed uninodal periods for Loch Earn, Lake Geneva, Lake Baikal, and Lake Cayuga (New York) are approximately 16, 96, 900 (binodal), and 65 hours, respectively.

Because hypolimnion water is very different from epilimnion water with regard to both thermal and biological characteristics, the massive movements of water and the turbulent exchanges that can occur during internal seiching are very important. Substantial portions of the bottom of shallow lakes can experience periodic alternation of exposure to hypolimnetic and epilimnetic water, and hypolimnetic water can be periodically exposed to the surface. - Encyclopædia Britannica


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Internal seiche pumping between sill-separated basins

Abstract: Despite their close proximity and similar dimensions (~ 200m deep times 10km long times 2km wide) the two eastern basins of Lake Lucerne, Gersauersee and Urnersee, exhibit considerable differences in their internal behaviour, particularly during late winter and spring. The two lakes are separated by a small intermediate basin (~ 120m deep times 4km long times 1km wide) with sills of approximately 90m depth at each end.... Following wind events a large amplitude internal seiche in Gersauersee (vertical excursions of ~50m and period ~60 hours) effectively pumped the heavier Gersauersee bottom water onto the intermediate basin and eventually into the hypolimnion of Urnersee. Temperature spectra show a peak at this seiche frequency at all levels at the Gersauer sill but only near the bottom at the sill in Urnersee. Coherence estimates between the bottom temperatures at Gersauer sill and Fluelen showed a significant peak at period 60 hours suggesting transmission of energy from the Gersauersee seiching motion through the weaker stratification of Urnersee to Fluelen. The phase relationships indicate that the wave phase speed decreases as the wave propagates into the region of weaker stratification. Application of a simple two-layer Defant model which includes topographic variations confirms these observations. The estimated volume exchange due to seiche pumping is only a small fraction of the Urnersee hypolimnion. However, the dissipation of energy transferred from the Gersauersee seiche may be an important contribution to mixing in the deeper waters of Urnersee. - Geophysical & Astrophysical Fluid Dynamics

Are internal seiche's designed to transfer energy from one layer to another and are they caused by the actual energy difference?

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The Seiche (internal and external)

The same kind of wave (seiche's) occurs in the lakes. In the case of Lake Champlain, the wave may be from 30 feet to 300 feet high! Why does nobody notice a wave that high in the lake? Because the wave doesn't happen on the surface, but underwater. This huge wave moves along the boundary between the warm water layer and the cold water layer.

The warm and cold layers of these lakes do not usually mix. The boundary is very much like the boundary between the surface of the lake and the air above it. In the same way the waves we usually see move along the water-air boundary, the giant seiche wave moves along the warm water-cold water boundary. A giant 300-foot wave might be roaring along underneath the water, while the surface is smooth and placid. - The UnMuseum


electrobleme

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La Rissaga (Meteo tsunamis) linked to Roll Cloud or are they both EU?
« Reply #1 on: September 15, 2009, 07:25:11 »

Roll Clouds and La Rissaga by products of an Electrical Universe?

Was this Roll Cloud responsible for the La Rissaga that hit the port of Ciutadella later on or were they both a by product of and event in the earths electric weather system? Does the Roll Cloud show that there were electrical currents rolling across the island causing atmospheric pressure differences, the roll cloud is created by the electrical plasma discharge.

Pressure changes and sea level changes may be triggered by the same thing, a change in electrical activity. Could the actual local gravity of the area also change? If everything is electric and gravity is an electrical universe by product could there be small changes in the gravity for Meteorological tsunamis? Maybe also for those freak waves or 100 year waves?


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Just back from holidays in Menorca (one of the Balearic islands) and last Thursday night I observed a very strange cloud formation. I was on the south coast of the island.

and here it is going overhead (at a very fast pace, i must add):



The formation stretched from horizon to horizon, and proceeded northwards in an almost tsunami-wave like manner. It was a jaw dropping sight to see.

That same night , the port of Ciutadella was inundated by an actual 4 metre high tsunami. Luckily , nobody was hurt, but an awful lot of property and boats were damaged...
La Rissaga , Menorca - roll cloud linked to tsunami?

« Last Edit: September 15, 2009, 07:54:54 by electrobleme »