During the Dust Bowl years , the drought was 30% more worst and severe than the one which came later in 1958 in the plains of North America. This conclusion was drawn from the findings of the research done by the scientists from Lamont Doherty Earth Observatory from Columbia university and NASA.This study was published in October 17 issue for Geophysical Research Letters.
The lead author of the study, Ben Cook said that,
“It was the worst by a large margin”.
He is a Climate scientist at NASA Goddard Institute for Space studies at New York .According to the scientists there are two major causes. First is the suppressed rainfall, due to the Dust Storm. The second reason is the presence of high pressure winter system which don’t let precipitation take place from the West Coast.
They further determined that the 71.6 % area of North America was affected by the Drought in 1934. On the contrary, 2012 drought affected almost 59.7 percent of North America. Using modern techniques of observation, scientist used the tree rings from 1000 to 2005 to determine these figures.