The year was the second warmest in modern times for the fragile Arctic, said the peer-reviewed report compiled by 85 scientists from 12 nations.
New instruments have been developed to help mobilise financing for projects to mitigate climate change, but measuring their impact remains difficult
The number of heritage sites at risk has grown to 62 from 35 in 2014 — nearly double the number from just three years ago
Scientists and green campaigners say the peatlands hold gigatonnes of carbon — a stockpile that poses a threat to hopes of limiting global warming.
The Paris treaty calls for capping global warming at "well under" two degrees celsius, and 1.5 °C if possible.