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Spain's lethal DANA weather condition phenomenon and its links to climate modification

Catastrophic flash floods that have actually eliminated at least 72 people in Spain are caused by a devastating weather system in which cold and warm air satisfy and produce effective storm cloud, a. pattern thought to be growing more regular due to climate. modification.

The phenomenon is known locally as DANA, a Spanish acronym. for high-altitude separated depression, and unlike typical storms. or squalls it can form separately of polar or subtropical jet. streams.

When cold air blows over warm Mediterranean waters it causes. hotter air to rise rapidly and form dense, water-laden clouds. that can remain over the very same location for many hours, raising their. damaging capacity. The event in some cases provokes large hail. and twisters as seen today, meteorologists state.

Eastern and Southern Spain are especially prone to. the phenomenon due to its position between the Atlantic Ocean. and the Mediterranean Sea. Warm, humid air masses and cold. fronts satisfy in an area where mountains favour the development of. storm clouds and rains.

This week's DANA was one of the three most intense such. storms in the last century in the Valencia area, Ruben del. Campo, spokesperson for the national weather firm Aemet,. stated.

Projections were in line with what occurred. However in a location. between Utiel and Chiva, in the province of Valencia, rainfall. exceeded 300 litres per square meter. In that location, storm. systems formed and regenerated continually, he described.

While experts state it will take time to evaluate all the information. to identify if this particular DANA was caused by climate. modification, a lot of agree that an increase in temperature level of the. Mediterranean and warmer and more damp atmospheric conditions. add to producing more frequent extreme episodes.

We can't say anything on the fly, other than that in the. context of climate modification, these types of events will be more. regular and more extreme, said Spanish meteorologist and. researcher Dr Ernesto Rodríguez Camino.

Before the term DANA was created in the early 2000s, any. heavy rainfall in the autumn, characteristic of the. Mediterranean climate, utilized to go by the popular name gota. fria (cold drop) in Spain and parts of France. The term is. still widely utilized informally.

Its origin go back to 1886 when German scientists. introduced the idea of kaltlufttropfen, or cold air drop, to. explain high elevation disturbance but without apparent. reflection on the surface.

Aemet states the idea of cold drop is outdated and defines. DANA as a closed high-altitude depression that has actually ended up being. separated and separated from an associated jet stream. Aemet says. DANAs in some cases become fixed or perhaps move in reverse, from. east to west.

(source: Reuters)