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The increasingly visible human footprint on extreme weather and climate events with dangerous and costly impacts is evident in a detailed analysis of the global climate 2011-2015 – the hottest five-year period on record, by the World Meteorological Organisation (WMO).
The record temperatures were accompanied by rising sea levels and declines in Arctic sea-ice extent, continental glaciers and northern hemisphere snow cover.

All these climate change indicators confirmed the long-term warming trend caused by greenhouse gases.

Carbon dioxide reached the significant milestone of 400 parts per million in the atmosphere for the first time in 2015, according to the WMO report submitted to the UN climate change conference.

The 2011-2015 period was the warmest five-year period on record globally and for all continents apart from Africa (second warmest).

Temperatures for the period were 0.57 °C above the average for the standard 1961–1990 reference period.

The warmest year on record to…