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Monsoon Rainfall Decline 2nd Steepest In Last Decade


The Indian Meteorological Division has launched a ‘new regular’ rainfall replace for the nation. Whereas the brand new up to date rainfall regular measures a decline in annual rainfall within the nation, the monsoon rainfall in Odisha reveals a decline in amount.

As per the IMD report, the annual rainfall measured within the nation for the interval 1961 to 2010 had been 1176.9 mm (117.69cm). The up to date rainfall knowledge reveals that within the interval 1971-2020, the annual rainfall obtained by the nation is recorded at 1160.1 (116.1). The brand new regular rainfall knowledge, subsequently, has recorded a decline of 1.59 cm of rainfall within the nation.

The information launched by IMD documented a drop in monsoon rainfall within the nation. Pattern the next desk.

Monsoon Drying Up!Monsoon Drying Up!

Through the interval 1961- 2010, the nation had obtained a mean rainfall of 880.6 mm in the course of the monsoon interval (June – Sept). Nonetheless, the up to date rainfall knowledge measures the typical rainfall in the course of the monsoons within the interval of 1971-2020 at 868.6 mm.

A knowledge evaluation reveals the monsoon rainfall within the nation shrinking by round 1.2 cm in the course of the interval 1971-2020. The drop in precipitation amount is attributed to erratic monsoon within the final decade and half.

Be it monsoon, pre or post-monsoon and even winter, the prevailing pattern has been that the rainfall has turned frugal within the nation.  A drop is a amount measured in each season. 

The SW monsoon rainfall within the nation has been on the decline for the reason that decade of 1971-80. however the horror story is over the past decade of 2001-2019, the departure from regular monsoon rainfall had been an enormous 4.8 %.

Declining Drops!Declining Drops!

Information with IMD revealed that the nation had recorded the best 6.1 % departure from imply decadal rainfall in the course of the SW monsoon interval. The nation had recorded a bountiful monsoon in the course of the interval 1921-1960. After a steady rise for 3 consecutive many years, monsoon rainfall has taken a plunge from the last decade 1951-60. (see the above picture)

Odisha Local weather

The IMD knowledge pops up a altering pattern of rainfall within the State. Within the interval 1961-2010, the imply rainfall in the course of the SW monsoon interval within the State had been round 1160.2 mm rainfall.

As per the brand new up to date regular rainfall launched by IMD, the imply rainfall measured for the interval 1971-2020, although, had remained between the vary of 1000mm-1600mm. An in depth evaluation by IMD reveals that within the interval of 1971-2020, the State had recorded a rainfall that had been within the vary of (-20mm to 10mm).

Monsoon Rainfall in OdishaMonsoon Rainfall in Odisha

The reason of the above numbers right here is the imply rainfall in the course of the lengthy interval of 1971-2020 within the monsoon interval had been poor within the State by 20mm and above regular by solely 10mm.

A look on the above knowledge clearly reveals the drop in monsoon rainfall within the State is greater at 20mm than the rise of 10mm.

Odisha Vs Different States  

A comparative evaluation of rainfall in SW monsoon knowledge reveals that states like main elements of Gujarat, Rajasthan, Madhya Pradesh and Andhra Pradesh have recorded greater rainfall in Monsoon in the course of the interval of 1971-2020. The states have recorded extra rainfall to the tune of 33 %. (see the picture under).

The Big TrendThe Large Pattern

Dry or Deluge In Odisha?

Not like the nation, the annual rainfall within the State has not recorded a drop. The imply annual rainfall measured in teh State for the interval 1971-2020 had been greater by round 10mm. The imply annual rainfall recorded within the State throughout interval 1961-2010 had been 1447.8mm.

However the vital pointer for the State has been that imply rainfall has turned damaging (-5mm) in winter. The precipitation amount in pre-monsoon had been within the vary of (-2mm) to (2mm).

Nonetheless, it’s within the post-monsoon season (means throughout Oct-Dec), imply rainfall within the above talked about interval had been up by practically 10 mm.

The Bottomline

A poor monsoon and surplus put up monsoon do not maintain ominous portends for the agrarian State. Declining monsoon rain means erratic rainfall in the course of the sowing season, and surplus rainfall in Oct-Dec means crop loss throughout harvesting interval.



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