Winter surface pressure patterns across the Northern Hemisphere when the Arctic Oscillation (AO) was negative (2009-10) and when it was positive (1988-89). The negative AO favors a warm Arctic and coo ...

Global average surface temperature has risen 0.14 degrees Fahrenheit per decade since 1880. The rate of warming has more than doubled since 1981. ...

The sun's total brightness varies by an average of 0.1 percent over an 11-year cycle, but there has been very little net change over the last century. ...

Since 1967, spring snow cover has shrunk by 1.4 percent per decade in April, 4.1 percent per decade in May, and 12.9 percent per decade in June. ...

Sea level has risen between 8 and 9 inches since 1880. The rate of sea level rise more than doubled from 2006-2015 compared to the rate throughout most of the twentieth century. ...

El Niño is on the prowl in the tropical Pacific. How loud do forecasters think it's going to roar?

Coastal storms brought heavy rains and flooding to the East Coast, and 111 counties had their warmest September on record.

Sharks, seals, birds, and fish count among predator species in the Northeastern Pacific that are ecologically, culturally, and commercially valuable. A new study shows how marine heatwaves affect predators differently.

Sea surface temperatures, storms, greenhouse gases, aerosols, and natural radiation all affect the tropical Atlantic climate. A new study finds that a north-to-south ocean temperature gradient is a key driver of Atlantic hurricanes and Sahel rainfall.

The ocean is storing 91% of the excess heat from global warming, contributing to sea level rise, ice shelf retreat, and stress on marine life. ...