Before revision: The Drought Research Initiative (DRI) was established to better understand the physical characteristics of and processes influencing Canadian Prairie droughts , and to contribute to their better prediction, through a focus on the recent severe drought that began in 1999 and largely ended in 2005.
After revision: The Drought Research Initiative (DRI) was established to better understand the characteristics and processes influencing Canadian Prairie droughts and better predict them, focusing on the severe drought which began in 1999 and largely ended in 2005.