Nghiên cứu thay đổi hướng mặt trời có thể cải thiện nóng lên toàn cầu

máy phun thiết kế để làm sáng đám mây trên sàn đáp của Hornet, tàu sân bay ngừng hoạt động hiện là bảo tàng ở Alameda, California

It was the first outdoor test in the United States of technology designed to brighten clouds and bounce some of the sun’s rays back into space, a way of temporarily cooling a planet that is now dangerously overheating. The scientists wanted to see whether the machine that took years to create could consistently spray the right size salt aerosols through the open air, outside of a lab.

If it works, the next stage would be to aim at the heavens and try to change the composition of clouds (thay đổi thành phần của đám mây) above the Earth’s oceans.

As humans continue to burn fossil fuels and pump increasing amounts of carbon dioxide into the atmosphere, the goal of holding global warming to a relatively safe level, 1.5 degrees Celsius compared with preindustrial times (thời tiền công nghiệp), is slipping away. That has pushed the idea of deliberately intervening in climate systems closer to reality.

The goal was to determine whether the aerosols leaving the sprayer, which had been carefully manipulated to reach a specific size, remained that size as they rushed through the air in different wind and humidity conditions. It will take months to analyze the results (phân tích kết quả). But the answers could determine whether marine cloud brightening would work, and how, according to Dr. Wood.

Ms. Wanser said she hoped the testing, which could continue for months or longer, will demystify the concept of climate intervention technologies. Toward that aim, the equipment will remain on the Hornet and be on display during hours when the ship is open to the public. Even if the equipment is not ultimately used to cool the planet, the data it generates can add to the understanding of how pollution and other aerosols interact with clouds, the researchers said.

source: nytimes,

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