According to a recent story on USAgNet, “Dramatic human-caused changes in land cover between 1850 and the 1930s had a substantive effect on the 1930s Dust Bowl drought in the Great Plains, a new study by University of Nebraska–Lincoln researchers finds.” Ocean temperatures are part of the story of what caused the Dust Bowl, but local changes in land cover also played a role in changing the atmospheric patterns which led to the drought. You can read more at https://www.usagnet.com/state_headlines/state_story.php?tble=NE2018&ID=566.