Rajdev Pandey, Patna. During the year 2023, the August rains saved the agriculture of Bihar. Almost 100 days of monsoon season have completed. The contribution of the month of August in the total rainfall of 629.4 mm in 100 days is 49% (306.5 mm). This situation is considered unprecedented. Considering that half of the total rainfall occurred only in August. According to meteorologists, the main reason behind this situation is climate change.
Understand the changing trend of rain in this way
According to the official data of IMD Patna, there is a comparatively decreasing trend of rainfall in June and July in Bihar during the last two years. It will be 172 mm in the year 2022, only 85 mm in 2023. In the previous two years like 2021 and 2020, there was 305.9 and 354.3 mm rainfall in the month of June. Even in June 2019, there was only 98.7 mm rainfall. In this way, a trend of decreasing rainfall in June is developing.
Special Facts:
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-Only 13 districts in Bihar have received normal rainfall so far. In this, except Banka, all the districts are of North Bihar.
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-Rainfall in 25 districts of Bihar is much less than normal, out of which eight are districts of Southern and Western Bihar except Begusarai, Madhubani, Munger, Saharsa, Sitamarhi, Samastipur, Shivhar and Naland. Southern Bihar is more or less affected by less rainfall.
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– Sitamarhi, Saharsa, Patna, Nawada, West Champaran, Saran, Gopalganj, Jehanabad, Bhojpur, Bhabua and Aurangabad are such districts, where 35 to 52 percent less rainfall than normal has been recorded.
Monsoon activity is constantly changing
There has been 178.2 mm rainfall in July this year. Higher than 134 mm in 2022, but much lower than 258 mm in 2021, 443 in 2020 and 418.5 mm in 2019. It is clear that monsoon activity has reduced in July. If we look at the data of the last five years in August, it becomes clear that the rainfall of this month is increasing almost continuously. In the year 2019 there was only 140 mm of rain, in 2020 there was 202.6 mm of rain, in 2021 there was 328.7 mm of rain and this time there was more than 306 mm of rain. The only exception was that in 2022 there was less than 170 mm rainfall.
Large monsoon system inactive, rains due to small weather events
According to Anand Shankar, senior meteorologist of IMD Patna, the mood of monsoon is changing rapidly in Bihar. Now monsoon is becoming active through small weather events like low pressure areas and depressions etc. Now the large scale monsoon system is comparatively less active in Bihar. The monsoon trough line played a major role in this. It is through this that the monsoon remained regular and active for a long time. His trend also remained set. At present, due to lack of continuity in low pressure areas and depressions, the number of dry spells has increased. Anand Shankar says that such incidents of change in monsoon trend were being seen last year also. All these changes are part of climate change.
Mercury increased by 2.6 degrees with decrease in rain activity
According to the forecast of the Meteorological Department in Muzaffarpur, the mercury has started increasing with the rain activity decreasing. There was a rapid change in the weather in the last 24 hours. The mercury has increased by 2.6 degrees. According to the records of the Meteorological Department, the maximum temperature was recorded at 33.2 degrees Celsius on Sunday. The minimum temperature was 24 degrees Celsius. Whereas last Saturday the maximum temperature was recorded at 30.6 degrees Celsius. According to the forecast, light rain will prevail in some districts of North Bihar till September 13. With the change in weather, people will once again have to face the heat.