[aruanan]

If the average global temperature rises by more than 2 degrees C in the 21st century, the eventual total melting of the Greenland ice cap will be a virtual certainty to occur during the 22nd to 24th centuries.

So, during the Holocene Maximum there wasn't a Greenland ice cap?

[cogitator]

So, during the Holocene Maximum there wasn't a Greenland ice cap?

I invite you to derive a conclusion to your question based on the graphic on the page below. Note that this is not the so-called "Hockey Stick", which covered the past 600, 1000, or 2000 years (there are a few versions). The plot on the page below is for 12,000 years and is based on several different data sources. The inset is the Hockey Stick, which is not relevant to your question.

Holocene Temperature Variations

Intriguingly, the light blue line is for Greenland -- which certainly addresses your question. So [considering the light blue line now] why might climate scientists be concerned about a 1.5 - 2 C (or more) global temperature rise by the end of this century? Particularly if high boreal latitudes are expected to warm even more?