According to this atmospheric scientist, three effects of climate change are creating higher flood risks in mountainous regions: more intense precipitation, shifting snow and rain patterns and the effects of wildfires on the landscape. — The Conversation
. In some locations, the changes in flood risk due to the shift from snow to rain could even be larger than the effect from increased precipitation intensity., as happened in the recent flooding in Yellowstone, the combination of rain and snowmelt can lead to especially high runoff and flooding.
In some cases, rain-on-snow events occur while the ground is still partially frozen. Soil that is frozen or already saturated can’t absorb additional water, so even more of the rain and snowmelt run off, contributing directly to flooding. This combination of rain, snowmelt and frozen soils was a primary driver of theWhile rain-on-snow events are not a new phenomenon, climate change can shift when and where they occur. Under warmer conditions,, where they were previously rare.
The 2022 Yellowstone flood inundated communities and swiftly eroded the land beneath this cabin that housed park employees. In lower-elevation regions, rain-on-snow events may actually become less likely than they have been in the past because of the decrease in snow cover. These areas could still see worsening flood risk, though, because of the increase in heavy downpours.Changes in flooding are not happening in isolation. Climate change is also exacerbating
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