Derf
Well-known member
Good answer. I don't have the time, personally, but I would hope that is what they did.I've seen them, but without the elevation database on which to do them, not easy to replicate. The data are open for anyone who wants to put in the time.
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It does consider the additional capacity of flooded coastlines, but since they'd be so shallow, it doesn't do very much.
Moisture in the atmosphere, just like the coastline question, is one that is not as simple as a doubling of the humidity. Greater heat would extend our atmosphere higher, as the greater energy of the molecules will compensate against gravity to some greater extent than now. Thus, the atmosphere will be able to accomodate more moisture. I'm sure there are additional factors I haven't thought about, both positive and negative.There is always water in the atmosphere. Clouds are, of course, the most visible manifestation of atmospheric water, but even clear air contains water—water in particles that are too small to be seen. One estimate of the volume of water in the atmosphere at any one time is about 3,100 cubic miles (mi3) or 12,900 cubic kilometers (km3). That may sound like a lot, but it is only about 0.001 percent of the total Earth's water volume of about 332,500,000 mi3 (1,385,000,000 km3), as shown in the table below. If all of the water in the atmosphere rained down at once, it would only cover the globe to a depth of 2.5 centimeters, about 1 inch.
So even a doubling of the present humidity would be a drop in the bucket, so to speak, if the continental glaciers continue to melt.
But I was also using the atmospheric moisture as a for-instance, suggesting there are many factors that will play into how much sea levels rise as the glaciers melt. To only consider one or a couple is short sighted. I'm not saying you are doing that, but nobody knows all of the factors. And even if we did, it would be difficult, if not impossible, to model them all correctly. That said, models can be improved and have been as we have learned more.
Ah, this is where we see divergence. I have historical documents that describe the beginning of the world, as well as events that followed, including a probable ice age less than 5000 years ago. You say the Ice Age occurred prior to that beginning of the world--a decided disconnect.(Barbarian notes sea levels haven't changed much in our history)
Yep. Last big change was the end of the ice age, about 8-10 thousand years ago. Long before historical times.
https://www.livescience.com/1759-stone-age-settlement-english-channel.html
Since you agree that the Ice Age was worse, then you would also agree that the world will survive this next change? Like it might flood many settlements like those in the article (though our settlements today might be more pricey to rebuild). And like the article says, more land would be freed up elsewhere (like Canada and Greenland and mountainous areas). It was no doubt uncomfortable for the people that had to relocate. It will be in our case, too, no doubt. But wasn't the end result a better one than the beginning? Isn't what we have today better than the Ice Age?Since the ice sheets then covered a lot more land than they do now, I don't think it would be hundreds of feet difference.
Is it not at least possible that the end result of our climate change period will be better than the current conditions? I know that's not what scientists are predicting, but sometimes scientists get it wrong, as in this article excerpt:
Forests in the northern hemisphere could be growing faster now than they were 200 years ago as a result of climate change, according to a study of trees in eastern America. The trees appear to have accelerated growth rates due to longer growing seasons and higher concentrations of carbon dioxide in the atmosphere. Scientists have documented the changes to the growth of 55 plots of mixed hardwood forest over a period of 22 years, and have concluded that they are probably growing faster now than they have done at any time in the past 225 years – the age of the oldest trees in the study. Geoffrey Parker, a forest ecologist at the Smithsonian Environmental Research Centre in Edgewater, Maryland, said that the increase in the rate of growth was unexpected and might be matched to the higher temperatures and longer growing seasons documented in the region. The growth may also be influenced by the significant increase in atmospheric carbon dioxide, he said. |
??? I'm just saying that if the Dutch can reclaim land area from the sea by putting up dikes and pumping out seawater, then we could more easily put up dikes before the sea water gets there. Then pumps are merely for maintenance rather than for establishing the area in the first place.Barbarian notes that putting up dikes and pumping out water is not the same thing as changing sea level.
No. That land is still below sea level. They have to maintain dikes and pump out water to keep it from flooding.