Arctic Report Card: update for 2013 (NOAA 2013)

National Oceanic and Atmospheric Administration (NOAA) (2013)

What's new in 2013? There were fewer snow and ice extremes than in 2012. Many regions and components of the Arctic environment were closer to their long-term averages, but the effects of a persistent warming trend that began over 30 years ago remain clearly evident.The impacts of the warming climate on the physical environment during those 30 years are influencing Arctic ecosystems on the land and in the sea.