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18577 |
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Date: June 19, 2023 at 23:21:14
From: pamela, [DNS_Address]
Subject: Rampant groundwater pumping has changed the tilt of Earth’s axis |
URL: https://www.nature.com/articles/d41586-023-01993-z |
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Rampant groundwater pumping has changed the tilt of
Earth’s axis
NEWS
16 June 2023
Update 19 June 2023
Human depletion of underground reservoirs has shifted
the global distribution of water so much that the North
Pole has drifted by more than 4 centimetres per year.
Davide Castelvecchi
The Earth has lost enough groundwater to thirsty humans
to measurably tilt the planet’s axis of rotation1.
The net water lost from underground reservoirs between
1993 and 2010 is estimated to be more than 2 trillion
tons. That has caused the geographic North Pole to
shift at a speed of 4.36 centimetres per year,
researchers have calculated. The results appeared on 15
June in Geophysical Research Letters.
A wobbling of the Earth
The tilt of the axis on which any celestial object
spins tends to be stable. But small changes can occur
when large masses shift location inside a planet and on
its surface. “Every mass moving around on the surface
of the Earth can change the rotation axis,” says Ki-
Weon Seo, a geophysicist at Seoul National University.
Astronomers can track such motions in the Earth’s axis
by observing quasars, the bright centres of distant
galaxies that constitute practically immobile points of
reference. The largest axis change is seasonal and is
triggered by the motion of atmospheric masses as the
weather and seasons change. This effect causes the
Earth’s geographic poles to wobble by up to several
metres every year.
The world faces a water crisis — 4 powerful charts show
how
Shifts in water masses can cause smaller but still
measurable changes in the tilt of Earth’s axis. Until
recently, researchers thought that these water-driven
effects would be caused mainly by the melting of
glaciers and ice caps. But when Seo and his
collaborators tried to model the Earth’s water content
to account for how much the axis has tilted, they could
not fully explain the data. Adding the effects of
changes in surface reservoirs did not help, says Seo,
“so I just scratched my head and said, ‘probably one
effect is groundwater’”.
Gravitational surveys have measured the depletion of
underground reservoirs, which is caused in large part
by irrigation, especially in northwestern India and
western North America. These surveys show that
groundwater pumping shifted enough mass into the oceans
to cause 6.24 millimetres of global sea-level rise
between 1993 and 2010.
By including these changes in their model, the authors
calculated that they should have a substantial impact
on the Earth’s rotation axis. They predicted that the
displacement of groundwater alone causes a shift in the
North Pole of 4.36 centimetres per year, roughly in the
direction of Russia’s Novaya Zemlya islands.
The research “distills the magnitude of groundwater
extraction across the globe to a significant, relatable
metric,” says Allegra LeGrande, a climate scientist at
the NASA Goddard Institute for Space Studies in New
York City. Seeing yet another global impact of people
on the world, she says, gives her a sense of “grief and
awe.”
doi: https://doi.org/10.1038/d41586-023-01993-z
UPDATES & CORRECTIONS
Update 19 June 2023: This story has been updated with
comment from a scientist who was not involved with the
research.
References
Seo, K.-W. et al. Geo. Res. Lett. 50, e2023GL103509
(2023).
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Responses:
[18579] [18580] [18582] [18584] [18589] [18578] |
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18579 |
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Date: June 20, 2023 at 05:57:53
From: Eve, [DNS_Address]
Subject: Re: Rampant groundwater pumping has changed the tilt of Earth’s axis |
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Spot on...caused by human activity. It's not just thirsty
humans...it is major used for livestock consumption as
well.
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Responses:
[18580] [18582] [18584] [18589] |
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18580 |
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Date: June 20, 2023 at 06:23:05
From: Eve, [DNS_Address]
Subject: Re: Rampant groundwater pumping has changed the tilt of Earth’s axis |
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Furthermore the waters of the earth are toxic by human
activity...nuclear waste, human waste, livestock waste,
and other industrial waste, etc....human generated.
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Responses:
[18582] [18584] [18589] |
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18582 |
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Date: June 21, 2023 at 19:13:49
From: georg, [DNS_Address]
Subject: Re: Rampant groundwater pumping has changed the tilt of Earth’s axis |
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every time a whale grounds itself it is deemed a
"mystery" by the media ... when are they going to admit
that suicide might be the cause
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Responses:
[18584] [18589] |
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18584 |
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Date: June 21, 2023 at 23:08:43
From: Eve, [DNS_Address]
Subject: Re: Rampant groundwater pumping has changed the tilt of Earth’s axis |
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I have had the same thought.
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Responses:
[18589] |
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18589 |
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Date: June 23, 2023 at 17:48:13
From: georg, [DNS_Address]
Subject: Re: Rampant groundwater pumping has changed the tilt of Earth’s axis |
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it seems to be an act of desperation and not an accident
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Responses:
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18578 |
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Date: June 20, 2023 at 00:08:22
From: pamela, [DNS_Address]
Subject: another perspective |
URL: https://youtu.be/arroxd7G7v0 |
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Earth's Tilt Has Shifted as Fish Farms Will Be Closed
Next
Earth's tilt has "been shifted" by ground water
pumping and the upper reaches of our atmosphere above
the thermosphere are compressing. Fish farms are the
next to be shut because of effects on the environment,
proteins gotta go !
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