Global warming will make heat waves hotter, longer, and more frequent. Communities in the U.S. West and the Great Lakes region may have the least time to prepare.
El calentamiento global es un síntoma del problema mucho más grande del cambio climático causado por los humanos.
Las actividades humanas emiten 60 veces o más la cantidad de dióxido de carbono liberado por los volcanes cada año.
U.S. maps of average daytime high temperature in January, April, July, and October in the 2060s show the projected impacts of continued high emissions of carbon dioxide.
Test runs of experimental models for predicting winter snowpack show some success in many mountain ranges in the western United States.
Groundfish stocks in the Eastern Bering Sea are healthy at present, but a recent string of very warm summers, preceded by winters with sparse sea ice, led NOAA biologists to recommend lower catch limits for pollock—the nation's largest commercial fishery.
Very old ice—thick, strong, and more melt-resistant—has nearly vanished in the Arctic. In March 2017, it made up less than 1 percent of the ice pack.
Spring and summer temperatures in the Arctic were cooler in 2017 than they have been in many years this decade, but the annual average surface temperature was still the second highest on record.
Where winter sea ice should be starting to cover the ocean, thousands of square miles of open water stretch westward from Alaska across the Bering and Chukchi Seas in November 2017.
