Dating and melting


06-Jan-2020 04:23

An assessment of about 200,000 glaciers in the world, some of which have been monitored since the mid 19th century, has found that about two thirds of the current rate of glacial melting is due to human influences on the climate.Scientists found that while much of the melting a century or more ago was most probably due to natural variability in the climate, it is now primarily caused by anthropogenic global warming resulting from industrial greenhouse gases.“We can clearly detect an anthropogenic effect on glaciers and it’s been steadily rising over the last 100 years,” said Ben Marzeion, a climate scientist at the University of Innsbruck in Austria.“In the 19th century and first half of the 20th century we observed that glacier mass loss attributable to human activity is hardly noticeable but since then it has steadily increased,” said Dr Marzeion, the lead author of the study published in the journal In comparison to anthropogenic warming caused carbon dioxide emissions, variations in solar radiation and the effects of volcanic eruptions, which can lower temperatures by blocking solar radiation, now play only a minor role in influencing whether a glacier recedes or expands, the scientists found.He was employed at Caltech's Division of Geological & Planetary Sciences at the time of writing the first edition.He is presently employed in the Space & Atmospheric Sciences Group at the Los Alamos National Laboratory.But they all have their disadvantages and they take time..of it.

dating and melting-12

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The study found that about 25 per cent of the global loss of glacier ice that occurred between 18 could be attributable to human influences, but that this rose to about 69 per cent between 19, based on computer simulations of the climate that included natural and man-made effects.“The influence of anthropogenic warming becomes robust around the middle of the 20th century.



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