Temperature extremes have been pretty unusual across the United States so far in 2014. Looking back over this time period quickly reveals at least part of what was going on: the polar jet stream got into a serious rut.

It's the time of year for potentially toxic algae blooms in Lake Erie. But the stage for most blooms is set in spring.

Never in the historical record have such large areas of the country experienced such radically different temperature extremes as they have so far in 2014.

Earth’s hottest periods occurred before humans existed. Those ancient climates would have been like nothing our species has ever seen.

CarbonTracker is a tool for modelling sources and sinks of carbon dioxide. Users can download the code, carbon dioxide data, and the tool's carbon flux estimates to conduct their own analyses or to help improve the system.

Pages