Globally, sea levels have risen by 20cm since the start of the 20th century, mostly due to thermal expansion of the oceans and melting of glaciers and ice caps.
Elsewhere, the 2016 autumn freeze-up was exceptionally slow, with sea ice extent even contracting for a few days in mid-November.
WMO Secretary-General Petteri Taalas said of the report, "With levels of carbon dioxide in the atmosphere consistently breaking new records, the influence of human activities on the climate system has become more and more evident." Anthropogenic activity has produced massive amounts of carbon dioxide, sulphur dioxide and other greenhouse gases that not only pollute the air, but directly contribute to the rapid warming of the planet.
The link between human activity and climate change has been decried by the WMO and other scientific organisations as irrefutable.
Taalas notes that the reality of the agreement needs to "[curb] greenhouse gases, [foster] climate resilience and [mainstream] climate adaption into national development policies."