The temperature change of the current's water is part of a known climate pattern, one that is expected to flip again, and cause more of the melting and ice thinning for which Jakobshavn is known. Although the melting rate has slowed, the glacier continues to contribute to sea level rise, ultimately losing more ice to the ocean than it gains from snow accumulation overall.
if you can follow this my mam born 1920 told me her mam told her when she was a child say about 1930 that her mam told her a mild winter killed more people than a cold un the thinking behind this it did not kill all the germs off i think. but it shows the weather does vary over the years
I was watching something on TV I had recorded, it was about a pile of human bones that were dug up by archeologists. To cut to chase, the bones dated to 13th or 14th century and showed signs of cannibalism.
Turns out that around that time there was a lot of freak weather and the crops failed regularly people were starving.