News Highlight
Winters in Delhi: the maximum temperature on Monday was 27.1 degrees Celsius, four degrees above the normal for this time of the year.
Key Takeaway
- The days have been unusually warm for winter this December, with the maximum temperature remaining above average.
- On Sunday, the high temperature reached 28.4 degrees Celsius.
- This is the second-highest maximum temperature for December from 2015 onwards, India Meteorological Department (IMD) data shows.
- The maximum temperature in December 2020 was 29 degrees Celsius, while the highest maximum temperature in December 2014 was 30 degrees, the all-time high for the month.
The reasons for warmer winters
- Penetration of easterly winds
- Another reason for warmer winters is the penetration of easterly winds from the Bay of Bengal.
- It will raise the minimum temperature but will not necessarily result in rain.
- The subdued effect of Western disturbance
- The reduced impact of Western disturbance activity may result in less cloudiness and above-normal day and night temperatures.
- The tempered effect of Western disturbance activity may result in less cloudiness and above-normal day and night temperatures.
The Effects of Warmer Winters
- The amount a warmer winter affects the wheat crop relies on the weather’s dynamic behaviour and the plant’s life cycle stages.
- Warmer winter impacts the wheat crop, and its extent depends on the weather’s dynamic behaviour and the plant life cycle stages.
Western disturbances
- They are extratropical storms with origins in the Mediterranean that bring brisk winter rain to the Indian subcontinent’s northern regions.
- It is a westerly-driven non-monsoonal precipitation pattern.
- These storms typically get their moisture from the Mediterranean, Caspian, and Black Seas.
- Western disturbances are crucial for the growth of the Rabi crop in the Northern subcontinent because they bring winter and pre-monsoon rain.
- Extreme weather phenomena like floods, flash floods, landslides, dust storms, hail storms, and cold waves can occasionally be brought on by Western disturbances.
La Nina
- About
- The trade winds are stronger than typical during La Nina, bringing warmer water toward Asia.
- La Nina has the opposite effect of El Niño.
- Impacts
- La Nina tends to provide colder winters in southern/western Europe, which causes snow in the Mediterranean region, and milder winters in northern Europe.
- The majority of these conditions are most noticeable in North America’s continent.
- Ecuador and Peru both experience drought as a result of La Nina.
- Western South America’s fishing industry typically benefits from it.
- La Nina in the western Pacific raises the possibility of landfall in the regions most susceptible to its effects, particularly in continental Asia and China.
- As a result, Australia has severe flooding, and the Western Pacific, Indian Ocean, and the waters off the coast of Somalia see high temperatures and monsoon rains that are relatively better in India.
- How it affects India?
- There could be significant rainfall in several areas of India, according to the India Meteorological Department (IMD).
- Rainfall on the Western Ghats could be average or below average.
- In North India, the winter rainfall is lower than usual.
- The Western Himalayas are receiving less snow than usual.
- The plains’ winter temperatures are lower than usual.
- The second half of the northeast monsoon will bring more rain.
Conclusion
- According to IMD experts, Delhi has had fewer western disturbances this year, which has resulted in nights with winter temperatures that are near to average but bright, sunny days with above-average maximum temperatures.
- There have been fewer such weather systems from around mid-November resulting in a more “stable” temperature.
Pic Courtesy: Indian Express
Content Source: Indian Express