It is crucial that they are accurate.
A new study conducted in Greenland is shedding new light on melting ice sheets.
According to a study published in the Nature Communications journal, the bare-ice ablation zone is acting differently than previously thought. "Climate models traditionally assume that all bare-ice runoff enters the ocean, unlike porous firn, in which some meltwater is retained and/or refrozen," it stated.
What's happening?
It is now believed that bare ice can act like firn ice, which is more porous, and snow. Bare ice is credited with contributing to the rising sea level. However, bare ice can also retain water and refreeze. The climate models are not accounting for this, so they are overestimating ice sheet runoff.
According to the study, "direct measurements of supraglacial runoff are overestimated by 21%-58% during peak summer melt conditions."
The study added: "Ice sheet mass changes are overestimated by 21%-47% relative to … satellite gravity retrievals, and satellite laser altimetry measurements indicate that surface melt rates are overestimated by 14%-40%."
Why is the miscalculation of ice sheet melt concerning?
https://www.msn.com/en-us/weather/topstories/scientists-discover-serious-flaw-in-predictions-for-major-global-crisis-overestimated/ar-AA1N6l6r?ocid=msedgdhp&pc=HCTS&cvid=68d2790152c64559bef72ad7cfe91e5c&ei=128
