Re: GIMP 3.0.0-RC1

On 1/3/25 11:43 AM, The Natural Philosopher wrote:

On 03/01/2025 16:31, Chris Ahlstrom wrote:

The Natural Philosopher wrote this post while blinking in Morse code:
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On 03/01/2025 13:32, -hh wrote:

Sea levels have already risen by 4 inches since 1993, and hard science
has found the primary energy imbalance reason why:  its anthropometric.

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Sea level rise has been 3mm/yr for the last 4000 years. Nothing has changed

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This source disagrees:
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     https://ocean.si.edu/through-time/ancient-seas/sea-level-rise
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Also, sea level is *not* the same all over the world. The article mentions that
as well.
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It's an interesting read.

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Well I will merely quote from the Wiki:
https://en.wikipedia.org/wiki/Past_sea_level
 "Sea level has changed over geologic time. As the graph shows, sea level today is very near the *lowest level ever attained*  (the lowest level occurred at the Permian-Triassic boundary about 250 million years ago)."
 "Recently, it has become widely accepted that late Holocene, 3,000 calendar years ago to present, sea level was nearly stable prior to an acceleration of rate of rise that is variously dated between 1850 and 1900 AD."
 *Long before any CO2 excess was present*.

Yes, the rate of raise was nearly stable **before** the Industrial Age.
Which is the point:  the contemporary acceleration in the rate of rise is a change, and it is coincident with the advent of the Industrial Age.
Overall, sea level is kind of like driving down the highway:  it doesn't particularly matter if the speed limit is 55 or 65:  what matters is when there's a rapid rate of change.
When we look at the timescale of rates of change, we find that over the past 2000 years, the last 150 years stand out:
[quote]
Stable sea level from 200 BC until 1000 AD
A 400-year rise by about 6 cm per century up to 1400 AD
Another stable period from 1400 AD up to the late 19th C
A rapid rise by about 20 cm since.
[/quote]
TL;DR KISS:
~1200 years of ~0.0 mm/yr
~400 years of +0.6 mm/yr
~450 years of: -0.1 mm/yr
~1850-present: +2.1 mm/yr
<https://www.realclimate.org/index.php/archives/2011/06/2000-years-of-sea-level/>
Doing the math, the history is ~195mm over 2000 years = +0.1 mm/yr, which means that today's 2.1 mm/yr is a 20x greater rate of change.
-hh