September 5, 2023
Climate Events Analysis
Using the Climate Shift Index maps, Climate Central issues alerts when there’s a notable heat event around the world that was made more likely by human-caused climate change.
The following examples were published in the summer of 2023.
Previous Climate Shift Index alerts
About the Climate Shift Index
Climate Shift Index levels indicate how much human-caused climate change has altered the frequency of daily temperatures at a particular location. Level 1 indicates that climate change is detectable in that day’s temperature. Level 2 means that climate change made exceptionally warm temperatures in a given location at least twice as likely. Level 5 is the maximum and indicates temperatures at least 5 times more likely because of climate change.
For these analyses, forecast temperatures come from NOAA’s Global Forecast System model, and past actual temperatures come from the ERA5 dataset.