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작성자로스터리정 조회 15회 작성일 2021-04-11 23:41:33 댓글 0

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Caltech Science Exchange: How Do We Remove CO2, and Where Does it Go?

Carbon dioxide (CO2) is a greenhouse gas that traps heat and warms the planet. Because of the burning of fossil fuels, the amount of CO2 in the earth’s atmosphere is higher than it has been in at least one million years.

Nature mitigates carbon and reduces some of the effects of climate change: Plants, trees, and algae in the ocean turn CO2 into oxygen through photosynthesis, and the ocean absorbs and stores CO2 in ocean sinks. But nature cannot withstand the rising levels of human-produced emissions. Consequently, Earth and the people on it have experienced the effects of climate change, such as more frequent and intense weather events.

That is why, in addition to efforts that reduce emissions through decreased fossil fuel use, scientists, engineers, and policy makers are pursuing techniques to decrease the CO2 that reaches and stays in the atmosphere and oceans.

Learn more about these science-based solutions in this video.

Interested in the science of sustainability and climate change?
Visit the Caltech Science Exchange https://scienceexchange.caltech.edu/topics/sustainability?utm_source=youtube\u0026utm_medium=web\u0026utm_campaign=csesustainability to dive deeper.

Caltech Science Exchange: Can Climate Models Be More Precise?

To explore and predict how the climate will change, researchers create computer models of the real world.

Models agree that the climate is changing because of human activity and that the average global temperature and the sea level will continue to rise. They also agree that weather patterns will change. Some of their specific predictions differ, primarily because each model includes different ways to model uncertain factors such as clouds.

In this video, Caltech’s Tapio Schneider, Andrew Stuart, and Anna Jaruga talk about why increased precision is an urgent goal for climate models.

Schneider and Stuart are cofounders of the Climate Modeling Alliance (CliMA). Schneider is Caltech’s Theodore Y. Wu Professor of Environmental Science and Engineering. He is also a senior research scientist at the Jet Propulsion Laboratory (JPL), which Caltech manages on behalf of NASA. Stuart is Bren Professor of Computing and Mathematical Sciences. Jaruga is a Caltech research scientist focused on clouds.

Interested in the science of sustainability and climate change?
Visit the Caltech Science Exchange https://scienceexchange.caltech.edu/topics/sustainability?utm_source=youtube\u0026utm_medium=web\u0026utm_campaign=csesustainability to dive deeper.

Caltech Science Exchange: What is the Future of Wind Energy Technology?

Developing renewable energy sources is a crucial part of addressing and mitigating climate change. Power derived from wind energy is a realistic and growing alternative to fossil fuel power.

Wind energy is a small but fast-growing fraction of electricity production. It accounts for 5 percent of global electricity production and 7 percent of the U.S. electricity supply.

Engineers are in the early stages of creating airborne wind turbines, in which the components are either floated by a gas like helium or use their own aerodynamics to stay high in the air, where wind is stronger. These systems are being considered for offshore use, where it is expensive and difficult to install conventional wind turbines on tall towers.

In this video, John Dabiri, Caltech’s Centennial Professor of Aeronautics and Mechanical Engineering, discusses the future of wind energy technology.

Interested in the science of sustainability and climate change? Visit the Caltech Science Exchange https://scienceexchange.caltech.edu/topics/sustainability?utm_source=youtube\u0026utm_medium=web\u0026utm_campaign=csesustainability to dive deeper.

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