When it comes to sea level rise, climate deniers are desperate.
It’s so obviously happening that denying its reality is a loser. It’s so obviously costly already (half a billion dollars in Miami) that trying to deny that will only prove that they’re not interested in reality. Sea level rise has gotten so out of hand, even climate deniers are worried about it (but for all the wrong reasons).
That’s why they keep trying the stupidest excuses imaginable to blame it on something — anything — other than global warming of course. The part which is both fascinating and disturbing is that, however moronic their claims, their followers are gullible enough to believe ’em.
Case in point: in a recent post I suggested that Roy Spencer move, together with his climate denial, to Miami Beach. This prompted a reader who is gullible enough to believe nonsense to comment:
Pardon me? Miami Beach? That pice of land where SUBSIDENCE is waaaay bigger than SLR? C’mon.
He’s just repeating some truly stupid bullshit, which makes him look truly stupid.
I guess he’s unaware that we have sea level data which is unaffected by land movement: the satellite data. It doesn’t measure relative sea level as tide gauges do, which depends on the height of the sea surface and the height of the land. It measures sea surface height directly.
We can compare the tide gauge data from Miami (Virginia Key is the closest station which is up-to-date) and the satellite data. The difference between relative sea level (from the tide gauge) and sea surface height (from satellites) estimates how the land has moved. And … what do we find? Here’s the satellite data for the ocean near Miami Beach (in blue) and the tide gauge data (in red):
It certainly doesn’t look like land subsidence is “waaaay” bigger than sea level rise.
We’ll get a better idea if we subtract the tide gauge data from the satellite data. This will estimate the vertical land movement, and I’ll remove the seasonal cycle to make things even clearer. The result:
According to the trend line (in red) the land is indeed sinking, but not very fast. We can calculate how fast the sea surface is rising, and how fast the land is sinking. The result (how fast sea surface height is rising, compared to how fast the land surface is subsiding):
Two things are clear. First, it’s not certain that the land is actually sinking. The rate suggest that it is, but the uncertainy (as indicated by the error bars) shows that result is uncertain. Second, even if the land is sinking, subsidence is definitely not “waaaay” bigger than sea level rise. It’s smaller — and that result holds even when allowing for the uncertainty associated with the trend estimates.
So where did he get his nonsense? “Trump University”?
I regularly get such comments from climate deniers. I moderate them out, because this blog is not a forum for climate denier bullshit. But from time to time, I use such comments to demonstrate just how stupid climate denier bullshit is. So keep ’em comin’! If you want to spend your time composing idiocy for this blog, only to see it disappear into the void or, better yet, provide fodder for demonstrating your folly, please do. And thank you.
This blog is made possible by readers like you; join others by donating at My Wee Dragon.