| Topic: | Re:Re:Re:Re:Re:Re:Re:Re:Re:Re:Re:Re:Re:Re:Re:Re:Re:Re:Re: 75 floods in 7 centuries | |
| Posted by: | Russell Pearson | |
| Date/Time: | 06/11/24 16:46:00 |
| This is what the WMO have to say on the matter “The phenomenon which hit Spain – known as Isolated Depression at High Levels, or DANA in Spanish – often occurs during the autumn season because the remaining warm surface heat from summer meets a sudden cold invasion aloft from the polar regions. This leads to what meteorologists used to call '''a cut-off system'' with low-pressure values that persist over a few days and rotating over the concerned region. It also impacted southern France. “The presence of warm air near the surface being fueled by excessive moisture from the still-warm Mediterranean Sea and the instability generated by the conflict with cold air in the upper atmosphere leads to large convective clouds with heavy downpours and sudden flash floods,” says Omar Baddour, chief of Climate Monitoring at WMO. “Climate change is expected to make these systems more intense because of warmer sea waters and increasing moisture in the atmosphere,” ” |