During the last glacial period, a vanished ocean current may have made the land bridge between Asia and the Americas into a place where humans could wait out the ice.
Global climate models
Posted inResearch Spotlights
Past Climate Sensitivity Not Always Key to the Future
New research suggests that changes in continental configuration, solar brightness, and background atmospheric carbon dioxide levels all conspire to drive Earth’s climate sensitivity over geologic time.
Posted inResearch Spotlights
How Ningaloo Niño Supercharges the El Niño–Southern Oscillation
The warm current cools the tropical Pacific and strengthens trade winds.
Posted inResearch Spotlights
Improving Our Understanding of El Niño in a Warm Climate
A new study seeks to bring together the strongest features of proxy data and climate models to reduce uncertainties in reconstructions of past El Niño behavior.
Posted inNews
Scientists Find the Point of No Return for Antarctic Ice Cap
Varying amounts of glacial debris in a core of ancient sediment show the ice cover grew and shrank until airborne carbon dioxide levels fell below 600 parts per million, spurring steady growth.
Posted inScience Updates
Quaternary Sea Ice Reconstruction: Proxy Data and Modeling
3rd Sea Ice Proxy Working Group Workshop: Sea Ice Proxy Synthesis and Data-Model Comparison; Bremerhaven, Germany, 23−25 June 2014