Climate feedback weakening, reducing Earth's sensitivity to warming over time.
The Earth's climate feedback has been changing over the past 50 years, leading to a decrease in climate sensitivity. This change is due to a sea surface temperature pattern effect, causing warming to be concentrated in the western tropical Pacific. While Earth system models show an increase in climate feedback, historical records reveal a decrease of $0.8±0.5 W/m^2K. Understanding and predicting this trend is crucial for accurate climate projections.