omega tau - English only

How do scientists uncover phenomena and explain their connections? How do engineers design machines, methods and infrastructure? At omega tau, experts give detailed answers. Over the last ten years, we have produced over 350 episodes in which we dug deeper, until we ran out of questions. Join us on our journey through the world of science and engineering: the closer you look and listen, the more interesting things get.


episode 385: 385 - Solar Geoengineering

Gast: David Keith    Host: Markus Völter    Shownoter: Alexander Grote

The root cause of global warming is that more and more of the energy supplied by the sun is captured by the atmosphere because of increased amounts of CO2 and other climate gases. One way of fixing this is to make sure that more of that energy is reflected and never even penetrates the lower atmosphere. Solar geoengineering proposes to put particles into the upper atmosphere to increase its reflectivity and thereby reduce the temperature. In the episode I talk with Harvard’s David Keith about some of the technical aspects, which role this technique can play in the overall fight against climate change, some of the political challenges as well as current avenues of research.

Introduction of Peter Keith and to stratospheric aerosol injection 00:08:37

David Keith | Albedo | Cirrus cloud | Stratosphere | Tropopause | Aerosol | Stratospheric aerosol injection | Sulfuric acid | Pinatubo | Lockheed U-2 | Feedback Loop

Unintended effects and moral implications 00:29:05

Rocket plume | Trolley Problem | Precautionary principle | Ozone depletion | Cost of climate change | Geo Engineering | IPCC

Climate Model simulations and issues 00:54:22

Gaussian Grid | Plume


 2022-03-18  1h1m