• Karen Seto Coordinates New IPCC Chapter

    75-80% of the world's population will live in cities by the year 2050. Infrastructure for another two billion humans has yet to be built. How should it be done in order to minimize contributions to climate change? Karen Seto was Coordinating Lead Author on the new urbanization chapter of the latest Working Group III report.

  • YCEI Honors IPCC Chair Rajendra Pachauri

    Founding Director Pachauri holds a hockey stick, an emblem of the potential trajectory of earth's temperature, presented by Yale President Peter Salovey. The gift bears signatures of Yale Presidents, top climate scientists and Coach Keith Allain of the Yale Bulldogs 2013 National Championship hockey team.

  • Chikungunya Makes Ready for Landfall

    A virus mutates, a mosquito adapts, and suddenly climate "feedback" takes on a whole new meaning. The chikungunya epidemic racing through the Caribbean poses no risk to most Americans. But that could change if Asian tiger mosquito, one of the world's most invasive pests again becomes a primary carrier.

  • El Nino In the Pliocene. Same As It Ever Was?

    Yale researchers report that temperature gradients existed across the Pacific during a time when CO2 levels were similar to those of today. Their findings challenge a long-held consensus about a permanent El Nino, suggesting temperatures then were higher than previously thought, and may be heading in that direction again.

  • Culture and Arctic Climate Change

    Physical Oceanographer Mary-Louise Timmermans hosts a 2-day workshop including historians, anthropologists, and climate scientists to discuss the perspective of their disciplines in the context of historic climate change and its effects on people of the Arctic.

Submitted by: Adam Wilson

After much of the U.S. experienced an unusually long and cold winter, many ask whether climate change is still happening.  There has, in fact, been little change in global mean annual temperature since the early 2000s leaving scientists struggling to figure out where the heat associated with continuing greenhouse gas emissions has gone.  In a recent paper…

Submitted by: Jonathan Mellor

A presumed benefit of global warming is the assumption that warmer winter temperatures might decrease excessive winter deaths (EWDs) common in temperate climates. EWDs are defined as the difference between the number of deaths in a region during winter months (December – March) and the average of the proceeding fall and subsequent spring deaths.

by Eric Ellman

For forty years, Royal Dutch Shell has committed significant intellectual resources to forecasting the future.  Multiple futures, in the form of alternative scenarios presented as if each had an equal chance to unfold as time reels forward. They are…


The same week as he oversaw release of the most recent IPCC report, “Patchy” is honored for his service as YCEI’s Founding Director.  He reflects here on when he first became concerned about climate, and the hope he sees now that  major corporations are planning for a lower carbon future.