Concept notes: Jaisalmer, located in Western Rajasthan, is known as the driest part of India due to its arid climate and low annual rainfall. This region is part of the Thar Desert, which is one of the largest deserts in the world. The climate in Jaisalmer is characterized by extremely low humidity and high temperatures, making it a challenging environment for agriculture and human habitation.
Explanation: Jaisalmer, located in Western Rajasthan, is recognized as the driest part of India due to its arid climate and extremely low annual rainfall. The region is part of the Thar Desert, which is one of the largest deserts in the world. The climate in Jaisalmer is characterized by high temperatures and low humidity, with an average annual rainfall of less than 100 mm. This makes it a challenging environment for agriculture and human habitation.
The Thar Desert, also known as the Great Indian Desert, covers a vast area of Western Rajasthan and extends into parts of Pakistan. The desert is a result of the rain shadow effect caused by the Aravalli Range, which blocks the monsoon winds from reaching the region. This geographical feature results in a significant reduction in rainfall, making the area extremely arid.
In contrast, other regions mentioned in the options do not experience such extreme aridity. Bhatinda, located in Punjab, experiences a semi-arid climate with an average annual rainfall of around 400 mm. Darbhanga, in Bihar, has a humid subtropical climate with an average annual rainfall of approximately 1,200 mm, which is significantly higher than Jaisalmer. Gandhinagar, in Gujarat, also experiences a semi-arid climate but with an average annual rainfall of around 1,000 mm, which is still higher than Jaisalmer.
Understanding the climatic conditions and geographical features of these regions is crucial for recognizing why Jaisalmer is the driest part of India. The arid climate of Jaisalmer is a result of its location in the Thar Desert and the rain shadow effect caused by the Aravalli Range, making it stand out as the driest region in the country.