MUMBAI: The amount of monsoons in India depends on the dust in North Africa, says a new study from the Indian Institute of Technology Bhubaneswar.
The dust in the air absorbs sunlight west of India, warming the air and strengthening the winds carrying moisture eastward. This results in more monsoon rainfall about a week later in India,'' said the study which appeared in Nature Geoscience on Sunday.
The study, done in collaboration with the US-based Pacific Northwest National Laboratory, explains how dust can affect the climate.
The study also shows that natural airborne particles can influence rainfall in unexpected ways, with changes in one location rapidly affecting weather thousands of miles away,'' said a release put out by the Pacific Northwest National Laboratory. The researchers analyzed satellite data and performed computer modeling of the region to tease out the role of dust on the Indian monsoon.
""The difference between a monsoon flood year or a dry year is about 10 % of the average summer rainfall in central India. Variations driven by dust may be strong enough to explain some of that year-to-year variation,"" said climate scientist Phil Rasch of the American department of energy's Pacific Northwest National Laboratory.
Rasch, V Vinoj of the Indian Institute of Technology Bhubaneswar, India, and their coauthors wanted to explore a correlation that appeared in satellite records: higher amounts of small particles called aerosols over North Africa, West Asia, and the Arabian Sea seemed to be connected to stronger rainfall over India around the same time.
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