Photograph on the beach of high waves with the sunset sun. El Niño event

El Niño

El Niño Southern Oscillation (ENSO) is a large-scale ocean-atmosphere interaction in the tropical Pacific Ocean. ENSO consists of oscillations between a warm phase (El Niño) and a cool phase (La Niña).

Finger and hand fingerprints in William James Herschel's Beginnings of Fingerprinting. Forcing and Fingerprinting

Forcing and Fingerprinting

The IPCC recently concluded (with 95% certainty) that humans are responsible for over half of the warming we’ve experienced since 1951. Their best estimate is that we’re responsible for all of the warming, and we could even be responsible for …
Plant field and black sky photo with orange filter to show climate change

Long-term Look at Climate Change

It has fallen upon climate scientists to develop the technical sophistication and to employ the research methods necessary to understand climate variables, how they change across time and space, and the degree of human-caused climate disruption.

Dr. Mike Mann on Climate Models, in office with books in the background

Dr. Mike Mann on Climate Models

Noted climate scientist Michael Mann discusses the scary reality that human greenhouse gas emissions are currently overcoming natural forcings, as well as the current confusion around surface warming, climate models, and natural variability.

IPCC members in the presentation of the Working Group II

Working Group II

Working Group II (WGII) covers the impacts and vulnerabilities caused by climate change and discusses pathways for adaptation.

IPCC leaders release their climate mitigation report in Berlin. Working Group I.

Working Group I

AR5 reflects advances in science that point to increased levels of certainty on issues already raised and provides greater detail on measurements and projections.

Close up photo of small snow mountain with the sun and mountains in the background. New Record for Temperature

New Record for Temperature Whiplash

U.S. temperature extremes in 2014 have been exceptional—with record heat in the West and cooler than average temperatures in the East—and many scientists think climate change may be contributing. Temperature extremes occur when regions experience temperatures at the top or bottom 10% of the historical range of recorded values.

Photo of Tacloban City, Philippines, after Super Typhoon Haiyan struck land.

Typhoon Haiyan

Super Typhoon Haiyan (called Yolanda by many in the Philippines) struck land on Thursday November 7th. It may have been the strongest tropical cyclone on record to make landfall.

Foggy forest photo

Debunking the Top 10 Climate Change Myths

Mythbusting: an unfortunately necessary part of climate communications There are a number of myths that opponents of climate action use to make their case. These attacks on climate science are repeated often, despite their innacuracy. Here's a quick rebuttal to …