Global temperature variations over time
The chart plots annual global temperature anomalies from 1850 onward. Values above zero represent years warmer than the baseline; values below zero represent cooler years.
Temperature anomaly data makes the long-term warming trend visible. That warming increases the odds of heat waves, shifts precipitation, melts ice, raises seas, and stresses ecosystems.
Rapid emissions cuts, cleaner electricity, efficient buildings, low-carbon transportation, and protecting forests and wetlands can slow the rate of warming and reduce future impacts.