Enhancing the Albedo Effect
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| Anzahl der Teile | 46 | |
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| Lizenz | CC-Namensnennung - keine kommerzielle Nutzung - keine Bearbeitung 3.0 Deutschland: Sie dürfen das Werk bzw. den Inhalt in unveränderter Form zu jedem legalen und nicht-kommerziellen Zweck nutzen, vervielfältigen, verbreiten und öffentlich zugänglich machen, sofern Sie den Namen des Autors/Rechteinhabers in der von ihm festgelegten Weise nennen. | |
| Identifikatoren | 10.5446/49651 (DOI) | |
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00:00
Besprechung/Interview
00:46
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Besprechung/Interview
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Besprechung/Interview
Transkript: Englisch(automatisch erzeugt)
00:00
With albedo, we mean that not all of the sunlight is absorbed by the earth, but some of it is just reflected back into space. If you have a look at that picture of the globe behind me, you will see it's not only dark, but we see a lot of bright white, and these are clouds.
00:21
So these white clouds reflect the light back into the atmosphere, and that's what we call albedo. So if we somehow manage to enhance the albedo, the reflectivity of our planet, we will have less light that is reaching the ground and is converted into heat, and therefore we have less warming by the sunlight.
00:42
And all methods that try to enhance the albedo of the planet are considered albedo methods. So enhanced stratospheric clouds, enhanced tropospheric marine clouds, but there of course are other more speculative ideas out there, like change plants to reflect more sunlight, or paint rooftops white,
01:06
or use concrete that reflects more sunlight in construction. Just assume that you need to change the albedo of 1% of the earth's surface, and then you can easily calculate that the total earth's surface is like 5 times 10 to the 14 square meters,
01:27
so you would have to paint 5 times 10 to the 12, which is 5 trillion in European trillion square meters. And then you multiply that by, let's say, $1 per square meter,
01:42
and you end up in a huge amount, and you have to replenish that paint every year, so that will be a huge effort for, let's say, a little effect. And lots of people would have to paint. Yeah, lots of people would have to paint, right.