Global Climate Indicators describe the changing climate, providing a broad picture of climate change at a global level that goes beyond temperature. They provide important information for the domains most relevant to climate change, including the composition of the atmosphere, the energy changes that arise from the accumulation of greenhouse gases and other factors, and the responses of land, oceans and ice. Key Global Climate Indicators include global mean surface temperature, atmospheric greenhouse gas concentrations, ocean heat content, global sea level, ocean acidification, sea-ice extent and the mass balance of glaciers and ice sheets.
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