Bjorn Stevens on the philosophy of climate modeling

In love with Maxwell

Bjorn Stevens has a lot going on: scientific member of the Max Planck Society, director of the Max Planck Institute for Meteorology, head of the department Atmosphere and the Earth System, professor at the University of Hamburg, lead author of an IPCC AR 5 Chapter 7, co-lead of a WCRP Grand Challenge on Clouds, Circulation and Climate Sensitivity. All of these roles don’t come as much of a surprise, once you get your head around the degree to which Bjorn manages to combine a deep scientific enthusiasm with big vision, an in-the-trenches grasp of details, a willingness to take risks, and an inspirational leadership style.

Continue reading →

Mat Collins on climate models and El Nino

Understanding climate models

If you’ve heard about any climate cycle, it’s probably the El Niño Southern Oscillation, or ENSO. 2015/2016 is looking like it might bring a record El Niño, and media coverage is, for climate, pretty remarkable.

The coverage is understandable, as weird things happen during big El Niños. The eastern tropical Pacific Ocean is anomalously warm during boreal winter. Deep convection moves away from the Western Pacific Warm Pool, and other bits of the climate system tend to shift to unusual states.

Continue reading →