Extreme rainfall in Central India in past 50 years

Meteorologists have observed a very high rise in the "extreme events of rainfall" in the country in the last 50 years.

Updated: Feb 04, 2012, 11:08 AM IST

Pune: Meteorologists have observed a very high rise in the "extreme events of rainfall" in the country in the last 50 years, particularly in Central India region in a climate change that can be attributed to global warming.

The finding is noted by the scientists at the city-based Indian Institute of Tropical Meteorology (IITM) which is engaged in various research projects relating to the monsoon behaviour in the country.

"We feel that the rise in extreme events of rainfall which has almost doubled in the past 50 years in Central India (excluding mountainous region) has a relation with global
warming," B N Goswami, Director, IITM said in a talk with PTI.

Referring to the meteorological data available with IITM, he said temperature over the Indian continent and Indian ocean region has risen over over the last 100 years, resulting in an increased moisture in the atmopshere.

Goswami said the rising trends noticed in intensity and frequency of the extreme events were significant and can be attributed to the phenomenon of global warming the world over.

He, however, noted that the total amount of the monsoon rainfall in India had not increased with the rise of temperature in the past 100 years, adding that the "potential
evaporation" had deceased over the country with the weakening of surface winds.
Highlighting the need for accurate projections of the monsoon in view of the climate change scenario, the IITM director said "reliable tools are required for reliable answer
to climate change".

According to India Meteorological Department (IMD), 2009 was considered the warmest year in the last 100 years, he said adding "we are trying to build more reliable models for
precise projections and long term prediction of the monsoon.

Goswami said that development of precision models would prove to be helpful to the country`s agricultural sector.

"There is a need to improve the models currently in use so as to provide better forecast of rainfall", he said adding that there should be development of "higher resolution"
climate change scenario using regional climate models.

The Centre for Climate Change Research at the IITM is currently working on reduction of uncertainties of projections development of precision models and capacity building with recruitment of young climate scientists, Goswami said.