The degree of retreat was greater than ever before.

The melting and retreat trends are accelerating.

Feedbacks in the system are starting to take hold. We could see changes in Arctic ice happening much sooner than we thought and that is important because without the ice cover over the Arctic Ocean we have to expect big changes in Earth's weather.

I think there is a degree of speculation that is satisfied the climate is changing.

You have to retreat if you can.

making a retreat so as to advance better.