Satellite laser ranging technique reveals 90 mm sea-level surge over past 30 years
Posted by Portalrules123@reddit | collapse | View on Reddit | 14 comments
Nilbogtraf@reddit
It has been a long time but I think, roughly, 8230ish billions tonnes of ice loss equals about an inch of sea level rise. 25.4 millimeters per inch, 3.5 inches of sea level rise in 30 years, with 60% attributed to mass as opposed to thermal expansion means a crapload of freshwater intrusion. (17280ish drunken math billions of tonnes of ice melt.)
PintLasher@reddit
One of the major contributors maybe more than ice melt, is extracted groundwater running off into the oceans. Its much more insidious than it seems at first No easy way to put that water back and it's kinda the entire thing that allows us to be the cancer that we are
RileyCrrow@reddit
The title makes it seem like it's a surprise, but it's not, it's just a new method of measuring sea levels:
(SLR is new, altimeters is old)
theCaitiff@reddit
Yep, we knew the sea level was rising, we knew by about how much, its just new tech telling us a bit more precisely than the older methods.
Saying the sea level has risen in the last 30 years is hardly ground breaking. Being able to more accurately keep track with precision instruments and compensate for how much water expands due to heat by bouncing a laser off of it is pretty cool though.
RileyCrrow@reddit
It is, and the article is interesting, it's just clear that the title was made clickbaity, probably without author's input.
Electrical_Notice169@reddit
It would be nice if the article would explain if this means the final value was greater or lower than the adjusted predictions using altimeters.
Only other mention in the article. Seems conflicting.
Worldly_Bit1416@reddit
Could anyone explain how it's related to this post on this sub? Thank you!
roblewk@reddit
That is an inch every 8 years. I know this is weird, but at 62 YO I convert everything into the likelihood of my seeing the worldwide embrace of Climate Change. It will happen someday. It will be ugly, there will be massive death, but it will happen. I fear I’ll miss it.
karabeckian@reddit
Hang in there Pops!
SometimesAccurate@reddit
This will be the next satellite they want to deorbit
trdvir@reddit
~4 inches of rise from 1880s to 1990s
~4 inches of rise from 1990s to 2020s
110 years --> 30 years --> ???
So surely we're nearing a plateau of acceleration (still crazy speed) since there are limits to how fast ice can melt and how fast water can absorb heat right? so maybe the next 4 inches in like 20 years? 15?
daviddjg0033@reddit
"GMSL Global mean sea level is primarily driven by two factors: the thermal expansion of seawater—as the oceans absorb around 90% of the excess heat in the Earth's climate system—and the increase in global ocean mass, which is mainly caused by the influx of freshwater from melting land ice."
"with about 60% of this rise attributable to ocean mass increase."
"Their research further indicates that GMSL has been increasing at an average rate of approximately 3.3 mm per year with a notable acceleration observed,"
StatementBot@reddit
The following submission statement was provided by /u/Portalrules123:
SS: Related to climate collapse and disruption of the water cycle as new satellite data using a laser ranging technique has revealed that average global sea levels have risen by 90 mm over the last thirty years, with an average of 3.3 mm of an increase per year. The sea level rise also appears to be accelerating in recent years. Most of this is attributed to an increase in ocean mass from freshwater entering the oceans from sources such as ice sheets, unreplenished groundwater, and glaciers, but some is due to thermal expansion as well. Expect many low lying nations to start losing land en masse in the coming decades, resulting in mass migration away from coastal areas and thus global conflict.
Please reply to OP's comment here: https://old.reddit.com/r/collapse/comments/1n63s9d/satellite_laser_ranging_technique_reveals_90_mm/nbx9bmd/
Portalrules123@reddit (OP)
SS: Related to climate collapse and disruption of the water cycle as new satellite data using a laser ranging technique has revealed that average global sea levels have risen by 90 mm over the last thirty years, with an average of 3.3 mm of an increase per year. The sea level rise also appears to be accelerating in recent years. Most of this is attributed to an increase in ocean mass from freshwater entering the oceans from sources such as ice sheets, unreplenished groundwater, and glaciers, but some is due to thermal expansion as well. Expect many low lying nations to start losing land en masse in the coming decades, resulting in mass migration away from coastal areas.