Team News Riveting
New Delhi, July 27
India has received 92 per cent Long Period Average (LPA) monsoon rainfall in the month of June, which is normal.
Union Minister of State (Independent Charge) Science & Technology; Minister of State (Independent Charge) Earth Sciences Dr Jitendra Singh said the LPA of the rainfall for the month of June was 165.4 millimeter (mm) based on the data of 1971-2020. The rainfall in June is said to be normal if it is within 92 per cent to 108 per cent of LPA.
The Minister informed about the early onset of southwest monsoon and said this was an inherent property observed in the inter-annual variability of monsoon behaviour. This year the monsoon onset over Kerala was on May 29, 2022 against the normal date of June 1 (3 days ahead of normal date) and it has covered the entire country on July 2, 2022, against the normal date of July 8 i.e. six days ahead of the normal date for monsoon coverage for the entire country.
There was excess rainfall over East and Northeast India and deficient rainfall over Central India.
Monsoon remained active in July due to formation and movement of low-pressure systems across Central India and the monsoon trough lying to the south of its normal position, the minister said.
Quoting a report released by IMD, Dr Jitendra Singh informed that five states of Uttar Pradesh, Bihar, West Bengal, Meghalaya and Nagaland have shown significant decreasing trends in southwest monsoon rainfall during the recent 30 years period (1989-2018). The annual rainfall over these five states along with the states of Arunachal Pradesh and Himachal Pradesh also show significant decreasing trends. Other states do not show any significant changes in southwest monsoon rainfall during the same period.
IMD has studied and investigated the observed changes of rainfall patterns and its extremes in the recent 30 years in different states and districts and 29 Reports of states and UTs on “Observed Rainfall Variability and Changes” have been published by IMD in January 2020.
Considering district-wise rainfall, there are many districts in the country, which show significant changes in southwest monsoon and annual rainfall during the recent 30 years period (1989-2018). With regard to the frequency of heavy rainfall days, significant increasing trend is observed over Saurashtra& Kutch, South-eastern parts of Rajasthan, Northern parts of Tamil Nadu, Northern parts of Andhra Pradesh and adjoining areas of Southwest Odisha, many parts of Chhattisgarh, Southwest Madhya Pradesh, West Bengal, Manipur & Mizoram, Konkan& Goa and Uttarakhand.
