New study reveals source of rain is major factor behind drought risks for farmers
A new University of California San Diego study uncovers a hidden driver of global crop vulnerability: the origin of rainfall itself.
Published in Nature Sustainability, the research traces atmospheric moisture back to its source—whether it evaporated from the ocean or from land surfaces such as soil, lakes and forests. When the sun heats these surfaces, water turns into vapor, rises into the atmosphere, and later falls again as rain.
Ocean-sourced moisture travels long distances on global winds, often through large-scale weather systems such as atmospheric ...