Note4Students
From UPSC perspective, the following things are important :
Prelims level: DANA
Why in the News?
The extreme conditions in eastern Spain which saw Valencia get a year’s worth of rain in just 8 hours can be blamed on an event locally known as Depresion Aislada en Niveles Altos (DANA).
What is DANA?
- Depresion Aislada en Niveles Altos (DANA), is commonly referred to as the “cold drop” in English.
- It is a meteorological phenomenon in the western Mediterranean region that brings intense rainfall and flooding.
- The term “DANA” was coined by Spanish meteorologists to specifically describe this weather phenomenon.
Features and Location:
- DANA occurs when cold air from the Polar Regions separates from the polar jet stream and descends over the warmer Mediterranean Sea.
- The contrast between cold air aloft and warm, moist air near the surface causes atmospheric instability, leading to the rapid formation of cumulonimbus clouds and intense thunderstorms.
- It primarily affects Spain and Portugal but can also impact Italy, France, and other areas around the Mediterranean Sea.
- This occurs in autumn and spring, as temperature variations are more pronounced during these seasons.
PYQ:[2014] The seasonal reversal of winds is the typical characteristic of: (a) Equatorial climate (b) Mediterranean climate (c) Monsoon climate (d) All of the above climates |
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