Chemistry 2011.org
Chemistry2011.org
All About Chemistry... 2011 and beyond
Global warming, Global warming

Related Stories

Indian monsoon failure more frequent with global warming, research suggests

Nov. 5, 2012Global warming could cause frequent and severe failures of the Indian summer monsoon in the next two centuries, new research suggests.

The effects of these unprecedented changes would be extremely detrimental to India's economy which relies heavily on the monsoon season to bring fresh water to the farmlands.

The findings have been published November 6, in IOP Publishing's journal Environmental Research Letters, by researchers at the Potsdam Institute for Climate Impact Research and Potsdam University.

They found that as we move towards the end of the 21st, and into the 22nd, century, increasing temperatures and a change in strength of the Pacific Walker circulation in spring could cause more frequent and severe changes in monsoon rainfall.

The Walker circulation usually brings areas of high pressure to the western Indian Ocean but, in years when El Niño occurs, this pattern gets shifted eastward, bringing high pressure over India and suppressing the monsoon, especially in spring when the monsoon begins to develop.

The researchers' simulations showed that as temperatures increase in the future, the Walker circulation, on average, brings more high pressure over India, even though the occurrence of El Niño doesn't increase.

These failures of the monsoon system -- defined in the study as a 40 to 70 per cent reduction in rainfall below normal levels -- were unprecedented in the researchers' observational record, which was taken from the India Meteorological Department and goes back to the 1870s.

The immediate effects of Climate-Change'>climate change on monsoon rainfall have already been observed by some researchers; however, the patterns of response in the coming decades are not uniform across different models and studies.

Lead author of the study, Jacob Schewe, said: "Our study points to the possibility of even more severe changes to monsoon rainfall caused by climatic shifts that may take place later this century and beyond."


Journal Reference:

  1. Jacob Schewe, Anders Levermann. A statistically predictive model for future monsoon failure in India. Environmental Research Letters, 2012; 7 (4): 044023 DOI: 10.1088/1748-9326/7/4/044023

Note: If no author is given, the source is cited instead.

The source of this article can be found at: Physics.

Note: Materials m' target='_blank'>http://www.iop.org" class="blue">Institute of Physics.

Note: Materials m

Share this story with your friends!

Social Networking

Please recommend us on Facebook, Twitter and more:

Other social media tools

Global Partners
Feedback

Tell us what you think of Chemistry 2011 -- we welcome both positive and negative comments. Have any problems using the site? Questions?

About us

Chemistry2011 is an informational resource for students, educators and the self-taught in the field of chemistry. We offer resources such as course materials, chemistry department listings, activities, events, projects and more along with current news releases.

Events & Activities

Are you interested in listing an event or sharing an activity or idea? Perhaps you are coordinating an event and are in need of additional resources? Within our site you will find a variety of activities and projects your peers have previously submitted or which have been freely shared through creative commons licenses. Here are some highlights: Featured Idea 1, Featured Idea 2.

About you

Ready to get involved? The first step is to sign up by following the link: Join Here. Also don’t forget to fill out your profile including any professional designations.

Global Partners