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70,920 次观看 • 2 个月前 •via X (Twitter)

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The Black Sea & Eastern Mediterranean CFD-V1. State 1 to State 2 [1] over a nine-hour period (plus one hour of settling time). During the initial acceleration northwards, the water retreats to the south. Shortly after we move over the geographic north pole, the deceleration sets in, and centrifugal forcing is reversed by ±180° - the departed water returns, inundating much of Ukraine - home to considerable coal, gas, and marine sedimentary deposits. Orange markers are marine fossils. Blue/Pink markers are salt deposits. The water levels during the second phase of this simulation are lower than would be expected in reality. More than 50% of the fluid volume is lost over the Sahara to the south and leaves the simulation domain. Some of this volume would have returned during the deceleration, but is not accounted for here (this is therefore likely a conservative outcome for this scenario). A further >45% is lost to the north, leaving <5% of the original simulation domain volume. Depth, velocity, precursor- and primary-flows are visualised as follows: Depth: greyscale shading of the fluid volume. Whiter is deeper. Velocity: blue-white-red graded shading of the particle system. Precursor (thin) Flows: leading the main volume may be seen as little 'sparkles' at the head of the inundation. These provide clues as to incursion potential. Primary (heavy) Flows: white particle flows which provide a sense of volume distribution in the simulation. Pooling: Dark grey areas on land indicate pooled water. Please note that this is a physically informed visualisation of the primary (acceleration) and secondary (centrifugal) forcings only. Lunar tidal forcing is not accounted for, as it is temporally unpredictable, and of negligible effect by comparison to those under consideration. Possible overflows from the Arctic and North Sea are not modelled. Presented in 4K resolution with DEM (GEBCO bathymetry) and Google Satellite imagery. This is not a predictive safety indicator. It is a passable, evidence-supported approximation of flow direction and extent for the theorised rotation. I may iterate this solution one more time (each taking approximately a week) to improve the detail, but the agreement with existing geological, archaeological, and cultural accounts seems good at this point. [1]

Craig Stone

69,747 次观看 • 1 年前