Rate of temperature–precipitation scaling in rainfall events
![Monsoon rains in south western USA](/sites/default/files/styles/landscape_16_9/public/2022-11/Monsoon-rain-alan-levine-flickr.jpg?h=43349d6f&itok=KSJvli5y)
Future extreme rain will be embedded in shorter, more convective dominant rainfall events in the northeastern region of North America, leading to larger rate in future temperature-precipitation scaling.
In a future climate, precipitation is expected to be around 7% more intense for each Celsius-degree temperature increment. This estimation is based on a thermodynamic relationship described by the Clausius-Clapeyron equation. However, the temperature-precipitation scaling rate is known to deviate for extreme precipitation.
Pérez Bello et al. [2022] use a duration-based classification of the extreme rainfall events to analyze this rate. By using an ensemble of 50-member climate simulations, they find that in northeastern North America the peak value and the total rainfall depth of the rainfall events respond differently to temperature. Values above the Clausius-Clapeyron relation were observed in the southern regions for most of the ranges of rainfall durations analyzed. The authors also find that in a future climate, the more extreme one-hour annual maximums will be embedded in shorter and likely more convective dominant rainfall events.