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Climate change at its finest

graphite · 61-69, M
Remember when Al Gore said we were all going to be underwater in 10 years so Rush Limbaugh put a 10-year doomsday clock on his website to track the impending catastrophe? The 10 years came and went, no catastrophe.
SilkandLace2 · 46-50, M
@graphite i do remember that, on more than one occasion!!🙄
Fairydust · F
We are living in dark times.

The world is full of deceit and evil, they’ll keep using this to gain control.
@Fairydust Our "rulers" are keeping us in the dark as much as possible.
Yeah. The joke is gonna be on Obama when the seas rise and bury his $12 million estate on Marth's Vineyard 🙄

[image deleted]
MrAboo · 36-40, M
The pictures were likely taken high tide in 1920 and low tide in 2020.
hippyjoe1955 · 61-69, M
@ElwoodBlues What change? You have such a short time line you have no proof at all. Have glaciers melted before? Yes! In fact most leading experts say that the earth has had at least 4 mass glaciation events in the past. For some reason the earth warmed up and the glaciers melted. The reason the glaciers melted in the past may well explain why they are melting now.
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sunsporter1649 · 70-79, M
@ElwoodBlues What model of suv's did these dudes drive?

@MarineBob says [quote]more big ships on the seas today than there was 100 years ago[/quote]
True. Maybe it would be more illustrative to look at shrinkage of glaciers - the source of the extra seawater.

Muir Glacier, Alaska

Muir Glacier and Inlet, Alaska, 1880s and 2005

Carroll Glacier, Alaska, 1906 and 2004

Grinnell Glacier, Montana, 1926 and 2008

Bear Glacier from space 1980. 1989, 2011

Bear Glacier from the air 2002, 2007

Glacier shrinkage driving global changes in downstream systems
[b]https://www.pnas.org/doi/10.1073/pnas.1619807114[/b]

Accelerated global glacier mass loss in the early twenty-first century
[b]https://www.nature.com/articles/s41586-021-03436-z[/b]
[quote]Using largely untapped satellite archives, we chart surface elevation changes at a high spatiotemporal resolution over all of Earth’s glaciers. We extensively validate our estimates against independent, high-precision measurements and present a globally complete and consistent estimate of glacier mass change. We show that during 2000–2019, glaciers lost a mass of 267 ± 16 gigatonnes per year, equivalent to 21 ± 3 per cent of the observed sea-level rise6. We identify a mass loss acceleration of 48 ± 16 gigatonnes per year per decade, explaining 6 to 19 per cent of the observed acceleration of sea-level rise. [/quote]
@hippyjoe1955 The melting [i]accelerated[/i] when CO2 levels began skyrocketing.
hippyjoe1955 · 61-69, M
@ElwoodBlues [b][i][u][quote]NOW THAT IS FUNNY![/quote][/u][/i][/b]!!! You have no idea how quickly the glaciers melted in the past.
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SilkandLace2 · 46-50, M
🤷‍♀️, i don't see any difference?!
SilkandLace2 · 46-50, M
@SW-User i can't really tell if you're being sarcastic or not, but judging by your other comments I'm guessing you are one of the climate changers, sorry for you😞
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@SilkandLace2 [quote] i don't see any difference?![/quote]
Maybe we need to look at more detailed measurements. At the southern tip of Manhattan they've measured about a 20 inch sea level rise over 160 years.

[quote]Historic sea level rise 1850–2017 in New York City at The Battery (NOAA, 2017). Black trend line shows an increasing trend from 1850 to 2017, while the red trend line shows a slightly higher trend from 1993 to 2017, which may reflect the apparent recent acceleration seen in the global sea level rise record.[/quote]

Also. GPS has been measuring a sea level rise of about 3mm per year globally since 1993, and the rate was slower in the first half of the 1900s. A picture at the scale HJ posted makes the change impossible to see.
MarineBob · 56-60, M
Looks the same to me
@MarineBob GPS has been measuring a sea level rise of about 3mm per year since 1993, and the rate was slower in the first half of the 1900s. A picture at that scale makes the change impossible to see.

Sea level rise, mm/year, as measured by GPS
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hippyjoe1955 · 61-69, M
@SW-User Already done. You choose not to believe what is widely known. Your problem not mine.
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Sea level rise, mm/year, as measured by GPS

@hippyjoe1955 says: [quote] There has been no increase in sea levels.[/quote]
Actually, sea levels have risen 6 to 8 inches in the past 100 years. But the process continues even after the warming stops.

[quote]Between about 21,000 years and about 11,700 years ago, Earth warmed about 4 degrees C (7.2 degrees F), and the oceans rose (with a slight lag after the onset of warming) about 85 meters, or about 280 feet. However, sea levels continued to rise another 45 meters (about 150 feet) after the warming ended, to a total of 130 meters (from its initial level, before warming began), or about 430 feet, reaching its modern level about 3,000 years ago.

This means that, even after temperatures reached their maximum and leveled off, the ice sheets continued to melt for another 8,000 years until they reached an equilibrium with temperatures.

Stated another way, the ice sheets’ response to warming continued for 8,000 years after warming had already ended, with the meltwater contribution to global sea levels totaling 45 additional meters of sea-level rise.

From about 3,000 years ago to about 100 years ago, sea levels naturally rose and declined slightly, with little change in the overall trend. Over the past 100 years, global temperatures have risen about 1 degree C (1.8 degrees F), with sea level response to that warming totaling about 160 to 210 mm (with about half of that amount occurring since 1993), or about 6 to 8 inches. And the current rate of sea-level rise is unprecedented over the past several millennia.[/quote]

https://www.globalchange.gov/browse/indicators/global-sea-level-rise
MarineBob · 56-60, M
@ElwoodBlues more big ships on the seas today than there was 100 years ago
Most of the Earth's ice is in Antarctica and Greenland; are those glaciers and ice sheets shrinking?


[quote] A recent study of Greenland’s ice sheet found that glaciers are retreating in nearly every sector of the island, while also undergoing other physical changes. Some of those changes are causing the rerouting of freshwater rivers beneath the ice.

In a study led by Twila Moon of the National Snow and Ice Data Center, researchers took a detailed look at physical changes to 225 of Greenland’s ocean-terminating glaciers—narrow fingers of ice that flow from the ice sheet interior to the ocean. They found that none of those glaciers has substantially advanced since the year 2000, and 200 of them have retreated.
. . .
“The coastal environment in Greenland is undergoing a major transformation,” said Alex Gardner, a snow and ice scientist at NASA’s Jet Propulsion Laboratory and co-author of the study. “We are already seeing new sections of the ocean and fjords opening up as the ice sheet retreats, and now we have evidence of changes to these freshwater flows. So losing ice is not just about changing sea level, it’s also about reshaping Greenland’s coastline and altering the coastal ecology.”
[/quote]
https://earthobservatory.nasa.gov/images/147728/shrinking-margins-of-greenland

Antarctica
[media=https://youtu.be/AmSovbt5Bho]

[quote]April 1, 2021. The Antarctic ice sheet's mass has changed over the last decades. Research based on satellite data indicates that between 2002 and 2020, Antarctica shed an average of 149 billion metric tons of ice per year, adding to global sea level rise.Apr 1, 2021
. . .
Areas in East Antarctica experienced modest amounts of mass gain due to increased snow accumulation. However, this gain is more than offset by significant ice mass loss on the West Antarctic Ice Sheet (dark red) over the 19-year period. Floating ice shelves whose mass change GRACE and GRACE-FO do not measure are colored gray.[/quote]
https://climate.nasa.gov/climate_resources/265/video-antarctic-ice-mass-loss-2002-2020/

[quote]For Antarctica, BEDMAP2 and Bedmachine provides the most complete and up-to-date estimate of ice volume, and it is derived by combining thousands of radar and seismic measurements of ice thickness [2,3].

In fact, BEDMAP 2 is derived from 25 million measurements. Fretwell et al. 2013 estimated that the Antarctic Ice Sheet comprised 27 million km3 of ice, with a sea level equivalent of ~58 m. BedMachine estimates the sea level equivalent of Antarctica to be 57.9±0.9m [/quote]
https://www.antarcticglaciers.org/glaciers-and-climate/estimating-glacier-contribution-to-sea-level-rise/
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