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An important consequence of the warming of the planet due to climate change is that the frequency and/or severity of extreme weather events will increase. But how can we tell whether a particular event can be attributed to the changing climate? Would it have happened in “normal” climate as well, and if so, how would the event have been different? This aspect of climate science is called attribution science, and the guest of this episode, Friederike Otto is a pioneer in the field.
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Earlier this year I visited the European Center for Medium-Range Weather Forecasts, a European organization that produces global weather forecasts and performs research on how to improve those. The episode has three parts. First, Hilda Carr gives us an overview of the organization, its purpose and its history. Then I talk with Peter Bauer about weather and climate modeling and about encoding these models efficiently in software programs that run on supercomputers. Part three is a conversation with Tony McNally about where the ECMWF gets its data and how it is continuously fed into the “running” model.
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The sea ice in the arctic and antarctic regions of the earth is an especially sensitive indicator of the earth’s climate, and in particular, the current overall atmospheric temperature of the planet. It was recently reported to have reached a new low. Our guest, NASA’s Walt Meier explains why this is the case and which processes govern the increase or decrease of the ice. We then discuss how the ice mass is measured based on satellite and how its thickness is estimated based mostly on in-situ measurements. We cover climate modeling and its connection to sea ice and conclude with an outlook on future research.
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