{"id":389734,"date":"2025-07-19T14:21:47","date_gmt":"2025-07-19T12:21:47","guid":{"rendered":"https:\/\/climatescience.press\/?p=389734"},"modified":"2025-07-19T14:21:49","modified_gmt":"2025-07-19T12:21:49","slug":"monster-nature-8x-faster-the-sea-near-africa-rose-10-to-25mm-a-year-in-huge-meltwater-pulses-12000-years-ago","status":"publish","type":"post","link":"https:\/\/climatescience.press\/?p=389734","title":{"rendered":"Monster Nature 8x faster: The sea near Africa rose 10 to 25mm a year in huge meltwater pulses 12,000 years ago"},"content":{"rendered":"\n
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From JoNova<\/a><\/p>\n\n\n\n

By Jo Nova<\/strong><\/p>\n\n\n\n

Twelve thousand years ago sea levels around Africa rose much faster than today<\/h3>\n\n\n\n

It\u2019s another totally solid, non-controversial paper that will never be mentioned in the media or by 50 shades of climate experts.<\/p>\n\n\n\n

In extraordinary detail, Vecchi et al look at 347 datapoints up and down the west coast of Africa and find that, like everywhere else, sea levels were a blockbuster 125m lower at the depths of the ice age 25,000 years ago. Then seas rose in rapid bursts as the vast Laurentide and Eurasian ice sheets melted, until they finally stopped rising 8,000 years ago. It must have been twelve thousand years of mayhem for corals, mangroves and beach-side cave-dwellers.<\/p>\n\n\n\n

In the northern Gulf of Guinea seas were recorded as rising at up to 25 mm per year about 12,000 years ago \u2014 eight times faster than anything we see today. And given the difficulty of knowing sea levels 15,000 years ago, there were probably many short episodes of faster shifts that got washed away, never to be recorded.<\/p>\n\n\n\n

All our panic about the current crisis of a pitiful 3mm-a-year rise allegedly \u201cdue to man-made CO2\u201d pales to nothing compared to what Monster Nature does. This study and hundreds like it, are like a stake through the heart of the vampire. For if the children understood the seismic shifts of the past, they would know that they were being sold a lie that the world had a stable and perfect climate or that current beaches have some sacred right to exist in perpetuity. Obviously, as commenters* pointed out, the Torres Strait Islanders ought<\/a> to have a cultural memory of massive inundation, reefs shifting and the beaches being washed away. Like everywhere else in the world, Australian sea levels have been falling<\/em> for 7000 years<\/a>.<\/p>\n\n\n\n

Thanks to Kenneth Richard at NoTricksZone<\/em> <\/strong>who wrote that Africa\u2019s Atlantic Coast Sea Levels Were Still 1 Meter Higher Than Today 2000 Years Ago.<\/a><\/p>\n\n\n\n

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Click to enlarge\u00a0 |\u00a0Nature<\/a>\u00a0 | NB: The authors must be left-handers and run their graphs right to left \u2014 so in graph C, the present is on the\u00a0left<\/em>.<\/figcaption><\/figure>\n\n\n\n

And if natural rises can be eight times faster than what we see today, then how do we know the current rise is not partially or wholly natural? All we have are climate simulations\u2026<\/p>\n\n\n\n

Sea levels have fallen by 1 to 4 meters in last 5,000 years<\/h3>\n\n\n\n

Imagine the amount of work to collect all these data points from so many locations?<\/p>\n\n\n\n

There were some sharp falls in sea level in the last 2,000 years.<\/p>\n\n\n\n

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Click to enlarge. The timeline reads backwards. The distant past is on the right hand side.<\/figcaption><\/figure>\n\n\n\n

From the paper:<\/p>\n\n\n\n

These data represent the first Atlantic Ocean evidence of the sea-level lowering trend during the LGM [Last Glacial Maximum]. Previously, the Barbados record, was the single LGM dataset available for the Atlantic Ocean2<\/a>,8<\/a>,10<\/a><\/sup> but its accuracy in defining the timing and magnitude of the LGM was debated for possible tectonic influence8<\/a><\/sup> as well as for the potential presence of allochthonous dated material from downslope transportation of the coral sea-level indicators29<\/a><\/sup>. \u2026<\/p>\n\n\n\n

Rates of sea-level rise during the main phase of deglaciation<\/h3>\n\n\n\n

A major phase of deglaciation and consequent increase in global mean sea level occurred between \u223c16.5 ka and \u223c7.0 ka BP24<\/a><\/sup> from a reduction of land-based ice volume of \u223c45 \u00d7 106<\/sup> km3<\/sup>.<\/p>\n\n\n\n

From the Abstract:<\/p>\n\n\n\n

From ~15 ka to ~7.5 ka BP, RSL shows phases of major accelerations up to ~25\u2009mm a\u22121<\/sup><\/strong> and a significant RSL deceleration by ~8 ka BP. In the mid to late Holocene, data indicate the emergence of a sea-level highstand, which varied in magnitude (0.8\u2009\u00b1\u20090.8\u2009m to 4.0\u2009\u00b1\u20092.4\u2009m above present mean sea level) and timing (5.0\u2009\u00b1\u20091.0 to 1.7\u2009\u00b1\u20091.0 ka BP).<\/p>\n\n\n\n

The Results<\/p>\n\n\n\n

In the northern Gulf of Guinea<\/strong>, RSL was stable at \u221261.6\u2009\u00b1\u20093.0\u2009m between 14.0 ka and 13.0 ka BP (Fig. 3c<\/a>). RSL rose to \u221244.9\u2009\u00b1\u20094.0\u2009m at 12.0\u2009\u00b1\u20090.2 ka BP and to \u221237.2\u2009\u00b1\u20093.0\u2009m at 11\u2009\u00b1\u20090.2 ka BP. Younger SLIPs indicate RSL rose to \u22126.1\u2009\u00b1\u20090.2\u2009m at 8.0\u2009\u00b1\u20090.2 ka BP and finally to \u22121.6\u2009\u00b1\u20090.7\u2009m at 7.0\u2009\u00b1\u20090.2 ka BP. The 9 SLIPs indicate two phases of major acceleration with rates of rise up to 25.2\u2009\u00b1\u200911\u2009mm a\u22121<\/sup> between 12.6 ka and 12.1 ka BP<\/strong> and up to 11.6\u2009\u00b1\u200911\u2009mm a\u22121<\/sup> between 10.0 ka and 8.0 ka BP (Fig. 3d<\/a>). After 8.0 ka BP, RSL rates were <7.0\u2009\u00b1\u20092\u2009mm a\u22121<\/sup> at 7.5 ka BP.<\/p>\n\n\n\n

In Congo, RSL rose from \u221270.7\u2009\u00b1\u20093.9\u2009m to \u221224.7\u2009\u00b1\u20091.7\u2009m between 13.3\u2009\u00b1\u20090.2 ka and 10.0\u2009\u00b1\u20090.2 ka BP (Fig. 3e<\/a>). Younger SLIPs indicate RSL rose to \u22124.3\u2009\u00b1\u20092.0\u2009m at 8.0\u2009\u00b1\u20090.2 ka BP and reached present sea-level at 7.0 ka BP. The 9 SLIPs show sea-level rose at rates from 13.4\u2009\u00b1\u20093.4\u2009mm a\u22121<\/sup> at 13.0 ka BP to 14.8\u2009\u00b1\u20091.8\u2009mm a\u22121<\/sup> at 11.4\u2009\u00b1\u20090.2 ka BP (Fig. 3<\/a>). This was followed by progressive decrease in rising rates from 10.3\u2009\u00b1\u20091.4\u2009mm a\u22121<\/sup> after 9.0 ka BP to 6.0\u2009\u00b1\u20091.0\u2009mm a\u22121<\/sup> after 8.0 ka BP, respectively (Fig. 3f<\/a>).<\/p>\n\n\n\n

Sea levels were higher in the Holocene, all over the world<\/h4>\n\n\n\n

Like giant oysters that used to live in the streets of Taiwan 7,000 years ago<\/a>. Hundreds of Pacific Islands appeared out of the sea in the last 5,000 years as the seas receded, and these islands didn\u2019t exist <\/a>during the Holocene peak. 50 million years ago New Zealand was as big as India, then the ocean swallowed Zealandia<\/a>. (So careless, they lost a whole continent.)<\/p>\n\n\n\n

The fact is, according to 1000 tide gauges, spread all over the globe, sea levels<\/a> are rising slowly at around 1 sole mm a year.<\/strong> And a nerd-level intense study of 60 beaches in Northern Europe showed a similar ris<\/a>e. By a strange coincidence the Topex\/Poseidon satellite sea-level data<\/a> set also showed the same tiny rates of sea level change in the 1990s \u2014 right up until they tortured the data to fit climate models. (We hear they calibrated the satellites to one sinking  gauge in Hong Kong).<\/p>\n\n\n\n

Other posts on Sea Levels<\/h4>\n\n\n\n