Global Mean Sea Level

[NotaDenier]

https://sealevel.nasa.gov/understanding-sea-level/key-indicators/global-mean-sea-level

I found an interesting site this morning. It looks like they only update periodically. I wonder if we will see a more than usual rise in sea level after this NH summer with a greater than usual amount of melt from Greenland.

[Tom_Mazanec]

Excellent site, thank you, NotaDenier.
Talking about Sea Level Rise, Paul Beckwith has just posted videos predicting 7 meters by 2070. Is he another Sam Carana, or is this actually within the realms of possibility?

https://paulbeckwith.net/2019/08/10/vulnerability-and-mayhem-greenland-blue-ocean-events-accelerating-sea-rise/
https://paulbeckwith.net/2019/08/16/accelerating-sea-level-rise-vacation-from-increased-extreme-weather-frequency-severity-duration/

In this video I expand upon my argument that global sea level will indeed rise 7 meters by 2070, as I originally discussed over 5 years ago in a video.

An Arctic Blue-Ocean Event (BOE) is likely by 2022 and will cause very large warming spikes that will further expose Greenland to:
accelerated, catastrophic ice loss with an abrupt increase in the frequency, severity, and duration of extreme weather events globally, as well as very rapid sea level rise.
As I said 5 years ago, I expect global sea level to: rise 7 m by around 2070, about 3.5 m by 2063, and about 1.75 m by 2055 or so.
———- ———- and
An Arctic Blue-Ocean Event (BOE) that is very likely by 2022 will cause very large Arctic warming. With no sea-ice left to melt, we lose our Arctic “refrigerator” and all that previous “latent heat” will now be “sensible heat” jacking up temperatures. This will further expose Greenland to accelerated, catastrophic ice loss with rapid sea-level rise and abrupt increases in frequency, severity, duration of extreme weather events globally.

[fschmidt]

The arctic will be free in September and refreeze in winter. I don't see a fundamental change to the situation today as the amount of old ice is already very low.

[oren]

He's certainly way out there.  His videos are not science.
I love how he back-end his promises. By 2055 he may still be considered a prophet. By 2070 his BS is exposed.

[Tom_Mazanec]

He's certainly way out there.  His videos are not science.
I love how he back-end his promises. By 2055 he may still be considered a prophet. By 2070 his BS is exposed.

I have a feeling he won't be around to answer for his BS in 2070 anymore 

[Tom_Mazanec]

While Singapore hopes never to go to war, it cannot avoid taking on another threat to the country's existence: climate change.
Sea levels will rise, posing a grave threat to the low-lying island, said Prime Minister Lee Hsien Loong yesterday.
The only question is when. He estimates it will cost $100 billion or more, over 100 years, to protect the country against rising sea levels.
https://www.straitstimes.com/singapore/sea-level-rise-poses-threat-to-spore

[Tom_Mazanec]

Sea Level: Gridded Average
https://tamino.wordpress.com/2019/11/08/sea-level-gridded-average/

I’ve formed a gridded composite sea level estimate and I’d like to share it. It’s quite crude, but some compensation is necessary because a simple average of stations is dominated by Europe and North America, there are so many tide gauge stations there. My regional breakdown was a first step; this is the next.

The graph on this article is...scary.

[Stephen]

He's certainly way out there. 

James Hansen was quoting similar possible sea-level rises about 10 years ago. It presumes doubling of the rate of rise every 10 years.  He wasn't predicting it as a certainty, but putting it forward as a possibility for discussion  This is exactly what scientists should be able to do as a matter of course and they should not be criticized for it.