What is the reason behind Himachal Pradesh experiencing its most rainless January since 1901
Himachal Pradesh had its most rainless January since 1901, but why did this happen? Find out.
There are several reasons behind Himachal Pradesh experiencing its most rainless January since 1901. Here are the key factors contributing to this phenomenon:
- Weak Western Disturbances: Western disturbances are low-pressure systems that bring winter rainfall to the region. In January 2021, the frequency and intensity of these disturbances were unusually weak, leading to a lack of precipitation.
- La Niña Phenomenon: La Niña, characterized by cooler than usual sea surface temperatures in the Pacific Ocean, can affect weather patterns worldwide. In the case of Himachal Pradesh, La Niña resulted in a shift of the winter jet stream, diverting moisture away from the region and causing a dry spell.
- High Pressure Systems: High-pressure systems over the region created a stable atmosphere, preventing the formation of clouds and rainfall. These systems, coupled with the absence of strong weather disturbances, further contributed to the rainless January.
- Mountainous Topography: Himachal Pradesh's mountainous terrain can impact rainfall patterns. Some areas may experience orographic effects, where moisture-laden winds coming from the west are forced to rise, leading to rainfall. However, in January 2021, these effects were limited, resulting in reduced precipitation.
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