IMD compiling data on 110 years of monsoon trends

50-page research booklet will discuss unpredictability of monsoon across the country

Written by Nisha Nambiar | Pune | Published: September 6, 2013 2:54 am

Pune India Meteorological Department (IMD) is compiling trends on rainfall of the entire country in the past 110 years. The records will be updated till 2010.

With the work on for the past three years,the data will be released shortly as part of a research paper.

“It is a voluminous data that we have been tracking for the past three years. Recording trends in rainfall – extreme and scanty,break and active spell,heavy rainfall – will be covered in this booklet,which will be released shortly,” said S Pai,director of long-range forecast.

The 50-page research booklet,which has been in demand by met scientists,will help understand the details and trends of rainfall. The book compiled for Met scientists discusses unpredictability of the monsoon and the heavy and scanty trends across the country.

“We have finished 99 per cent of the work and we should be able to release it soon in Pune,” Pai said. With the Ministry of Earth Sciences keen on studying the trends,the data will be of use to forecasters too.

Many Met departments have taken up various areas for data compilation. Recently,the regional meteorological centre in Bhubaneshwar had started compiling data on climatology in their state over the past 40 years. The centre would publish it in a book and also upload it on their website.

It is slated to be a repository of information on standard rainfall,trends and other parameters,including thunderstorms,humidity,temperature and wind speed.

3.8 mm rainfall recorded on Thursday

On Thursday,Pune received heavy showers in the afternoon with the Met department recording 3.8 mm rainfall. The total average rainfall recorded in Pune from June to August was 499.9 mm. While June and July recorded more than the mean normal rainfall set by the IMD, August saw a dip in the rainfall. Till July end,rainfall recorded in Pune was 435.5 mm,while only 46 mm rainfall was recorded in August. Compared to 34.5 mm rainfall in June last year,this year for the same period the met department recorded rainfall of 261.6 mm. The normal mean rainfall for the period is 137.7 mm.

In July it was 73.4 mm rainfall with the normal mean being 184 mm and August recorded 204.9 mm rainfall as against the normal 117 mm rainfall. Met officials maintained that while heavy rainfall was recorded in June and July,there was a slight dip in August.

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