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Originally posted by Slipdig1
reply to post by Pigraphia
In relation to the boats displacement, Did you see the Archimedes principle of floating in the OP?
Originally posted by ken10
If you look at the Amazon river alone, it dumps a billion metric tons of sediment into the ocean every year...This river over time alone has to displace water and increase sea levels, let alone all the other rivers in the world dumping their sediment too.
Sea waters density is 1027kg/m3 not 1000kg/m3 so thats one mistake.
The density of surface seawater ranges from about 1,020 to 1,029 kg•m−3, depending on the temperature and salinity. Deep in the ocean, under high pressure, seawater can reach a density of 1,050 kg•m−3 or higher.
There are 10000 cargo ships world wide able to take an average 15000 teu each. A Teu is around 24000kg 0r 24 tonne. This would weigh one in at 360 000 tonnes and 10000 would be 3 600 000 000 tonnes
How did you convert the square Kilometres to a measurement of volume by multiplying it by a measurement of weight?
Land amounts added
Tokyo Bay, Japan - 249 km2
Kobe, Japan - 23 km2 (1995)
Buoyancy = weight of displaced fluid.
Cox and Chao  reported the detection of a large anomaly in the time series of Earth's dynamic oblateness J 2, the lowest-degree gravity spatial harmonic, in the form of a positive jump since 1998 overshadowing the decreasing secular trend in J 2 caused primarily by the postglacial rebound (PGR). Here we report that recent data show that J 2 has been rapidly returning toward “normal” (with PGR considered) since early 2001. In search of the geophysical and climatic causes for this “1998–2002 J 2 anomaly,” we report an oceanographic event that took place in the extratropic north and south Pacific basins that was found to match remarkably well with the time evolution of the anomaly. We examine the leading (nonseasonal, extratropic Pacific) Empirical Orthogonal Function/Principal Component modes in the sea-surface height (SSH) data from TOPEX/Poseidon, sea surface temperature (SST) data from the National Center for Environmental Predictions, and output fields of the Estimating the Circulation and the Climate of the Ocean (ECCO) ocean general circulation model (OGCM), including ocean bottom pressure (OBP) and temperature and salinity profiles. The phenomenon appears to be part of the Pacific Decadal Oscillation, and temporal correlations are made. However, quantitatively, the OBP field of the ECCO model predicts a J 2 anomaly that is smaller in magnitude than the observed by a factor of about 3. We discuss various possibilities for reconciling this discrepancy in terms of inadequacies of present OGCMs and considering other geophysical contributions; a complete resolution of the J 2 enigma awaits further studies.
posted on 30-9-2012 @ 05:01
I know this is old and I stumbled across it whilst browsing similar information however.....has anyone considered that the number of tonnes of seafood pulled out of the ocean must vastly outweigh the mass of ships within it..