Extreme storms in Southwest Asia (Northern Arabian Peninsula) under current and future climates

Precipitation extremes will generally intensify in response to a warming climate. This robust fingerprint of climate change is particular concern, resulting heavy rainfall and devastating floods. Often this intensification explained as consequence the Clausius–Clapeyron law warmer world, under constant relative humidity. Here, based on an ensemble CMIP5 global models high-resolution regional simulations, we take example Southwest Asia, where extreme storms beyond Clausius- Clapeyron scaling, propose additional novel mechanism for region: unique increase atmospheric humidity over Arabian Sea associated deep northward penetration moisture. dictated by changes circulation Indian Ocean. Our proposed consistent with recent, most storm ever observed region. findings advance new understanding natural variability region, substantial implications adaptation region’s critical infrastructure.