They obviously didn't know there was a Little Ice Age and a Dalton and Maunder minimum after the medieval warming of nearly 1000 years ago.
When a lot of ice melts, as it did after the end of The Little Ice Age, it runs down hill due to gravity. At the bottom of the hills are what we call oceans. When water flow into those oceans, they get deeper, unless so much water is evaporating and being dumped as snow at the poles that they get shallower.
Also, as water gets warmer, it expands, unless it is close to 0 degrees Celsius in which case it shrinks. That's why ice floats. Over 4 degrees, water expands as it gets warmer. So with the end of the brrrrr temperatures of The Little Ice Age, the oceans got a tiny bit warmer and therefore expanded just a bit.
But Global Alarmists should be fearful, because lots of water is near 0 degrees, so as it heats, it will first shrink, causing sea level to fall, and then expand as it warms further, causing sea levels to rise. So Global Alarmists should warn that if sea levels rise, or fall, both are due to Global Warming. Same as if it snows, or doesn't, or rains, or doesn't, or is windy, or isn't, or is cloudy, or isn't - it's all due to Global Warming.
Meanwhile, to help alleviate fear of 10cm of sea level rise, or fall, you should get a graph of sea level over the last 15,000 years. Warning, it's so much [hundreds of metres] that after seeing it and wetting your pants, you won't be worried about 20cm of sea level rise in the 21st century.
Hint - don't worry about 20cm of sea level rise over 100 years. Be fearful of 100 metres of sea level rise in half a second due to a wave caused by a bolide. Or 10 metres due to an earth-quake. See Japan a few years ago for example.
Mqurice |
