Understanding climate
for the benefit of society

The Physical Science Basis

The Working Group 1 contribution includes a detailed assessment of climate change observations throughout the climate system - weather, ocean currents, sea ice and glaciers. 

Climate Change 2013: The Physical Science Basis from IPCC WG1 on Youtube.

The Working Group I contribution provides a comprehensive assessment of the physical science basis of climate change. The report explains how the increase of human made greenhouse gas emissions have warmed the atmosphere and ocean, melted snow and ice and raised global sea levels. 

Link to the whole WB1 report here.

Link to Summary for Policymakers.