The bottom of the ocean has started sinking under the weight of melting glaciers..this is a real article!

https://www.sciencealert.com/bottom-ocean-literally-sinking-under-weight-melting-glaciers-climate-change

Decades of measurements and predictions of sea level rise could have underestimated the scale of the problem, experts warn, due to scientists not accounting for the weighty, warping effects of our ever burgeoning oceans.

Existing assessments of sea level rise haven’t factored in that as the total ocean mass increases due to melting glaciers and ice sheets, the weight of all that extra water pushes down on the sinking ocean floor, deforming the seabed – and disguising just how much the oceans are truly swelling.

“The Earth itself is not a rigid sphere, it’s a deforming ball,” geoscientist Thomas Frederikse from the Delft University of Technology in the Netherlands told Earther.

“With climate change, we do not only change temperature.”

The implications, according to Frederikse and his team, is that as the ocean bottom subsides elastically, the actual increasing volume of the ocean – called barystatic sea level rise – is masked from measurements based on satellite observations.

That’s because satellite readings only tell us one side of the story: geocentric sea level rise, as seen from the surface side.

“[B]ecause satellite altimetry observes sea level in a geocentric reference frame, global mean sea-level estimates derived from altimetry will not observe the increase in ocean volume due to ocean-bottom subsidence, and hence, they may underestimate [global mean sea-level] rise,” the researchers explain in a new paper.

To quantify how much the bottom of the ocean is deforming under the extra load of meltwater, the researchers used various estimates of mass loss from glaciers, the Greenland and Antarctic ice sheets, and land water storage, including groundwater depletion and dam retention.

For roughly the last two decades (the period 1993–2014), the team calculates the increase of the total ocean load has pushed the seabed down by about 0.13 mm (0.005 inches) per year, or around 2.5 mm (almost 1/10th of an inch) in total for the period.

That might not sound like much, but in some regions the deformation is significantly greater – up to 1 mm (0.04 inches) per year over the Arctic Ocean, and 0.4 mm (0.016 inches) per year in the South Pacific.

Overall, the researchers say purely satellite-derived assessments of sea level rise for the period could have underestimated barystatic sea level rise by as much as 8 percent – which is definitely something we need to think about in the future, especially this hidden variable will only become more significant as the world gets hotter and sea level rise accelerates.

“In a future warming climate, the sea-level rise induced by ice sheets will increase, and therefore, the magnitude of the bias due to elastic ocean-bottom deformation will grow,” the team writes.

“To increase the accuracy of sea-level estimates, the effect of ocean-bottom deformation should be taken into account, either based on modelled estimates of ocean mass change, as was done in this study, or using more direct observations.”

The findings are reported in Geophysical Research Letters.

http://onlinelibrary.wiley.com/doi/10.1002/2017GL075419/abstract

———–

how do they measure at the bottom of the worlds oceans which are between 6000 and 30,000 feet down?

the weight has allegedly led to a 0.004 of an inch depression..please..this is just fake alarmist clap trap..

“That might not sound like much, but in some regions the deformation is significantly greater – up to 1 mm (0.04 inches) per year over the Arctic Ocean, and 0.4 mm (0.016 inches) per year in the South Pacific.”

*sigh

“based on modeled estimates of ocean mass change”

oh..the models..the modelling..so accurate..so politically on point!

401

~ by seeker401 on January 16, 2018.

3 Responses to “The bottom of the ocean has started sinking under the weight of melting glaciers..this is a real article!”

  1. haha! What a crazy message. By using “model” “estimates” – estimates, again “estimates” they were able to calculate the extreme measurement that was an “estimated” less than 1mm movement. Less than 1mm for most of the movement, some as much as – wow – 1mm. What a jacked up effort by the green religion.

    I love (sarcasm) how they even made the estimate. Not by any observation methods. Not by anything that has to actually do with the ocean floor itself – one would think an estimate, or anything about the ocean floor, would have to actually involve the ocean floor in the calculation, but no:

    “To quantify how much the bottom of the ocean is deforming under the extra load of meltwater, the researchers used various estimates of mass loss from glaciers, the Greenland and Antarctic ice sheets, and land water storage, including groundwater depletion and dam retention.”

    The scapegoat method was the pseudoscientific method. Since the green religion falsely predicated the ocean levels were going to rise and put the coastlines around the world under water, and since that never happened, then they make the ocean floor the scapegoat. The water is there somewhere, they say, so it must be because the ocean floor sank. That is where all the water went. Maybe all the water went over the flat earth waterfall? Might as well throw that in there while they are at it. haha!

    I know! Our world is a toilet bowl and when the ice melts it overflows the sides of the toilet and fills the rest of the spaceroom.

    • haha..remember when it was only a warming world and then it got cold..so the meme changed..then they lost all the heat..then they found it all in the oceans..and i could go on.. 🙂

  2. Yes I noticed when paddling in the Clyde last summer the water was about 1 millimeter higher up my ankle than the previous summer – lol

    Surely the guy realises that there are raised beaches all round the world
    of about 30 ft when the water was much higher in the past .
    Compare 30 ft with less than a millimeter .

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