The National Center for Atmospheric Research, an important hub for work on the causes and consequences of climate change, has shut down a program focused on strengthening poor countries’ ability to forecast and withstand droughts, floods and other climate-related hazards.

The move, which center officials say resulted from the shrinking of federal science budgets, is being denounced by many experts on environmental risk, who say such research is more crucial than ever in a world with rising populations exposed to climate threats.