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有可能在杆子上造冰吗?(关闭)

人类是否有可能在两极之下建立一个受控的系统来再次制造人造冰山?为了防止冰层融化，降低海平面?这个系统会影响生活质量和气候吗?

回答

这取决于哪个极点。南极位于南极洲的中部，平均温度为-57°C，那里没有液态水，空气非常干燥。因此，我想说，由于液态水的缺乏，不可能产生更多的冰。如果有液态水，它就会自然结冰。如果我们看一下南极的地理，这就说得通了。这张地图会有帮助。根据你的想法，一个可能的行动是将液态水从海岸带到南极，并让它冻结在那里。然而，南极与最近的海岸(实际上在数百米厚冰下)之间有500多公里的距离，与开放水域之间有1300公里的距离，这使得这个想法非常不切实际。一个类似但更有效的方法是将水从海岸泵到附近的南极盆地，这确实有助于降低海平面。这个想法是由科学家提出的。 However, to make this effect significant you would need to pump incredible amounts of water, something that makes this geoengineering idea very costly and not very appealing. Other scientist have proposed that dumping piles of rock in the ocean floor at specific points could be the most cost-effective way to slowdown sea level rise. The idea is to redirect warm ocean currents away from glaciers, something that could significantly reduce the rate at which they are melting down. This approach would have a much lower (but still very high) cost. [This paper][4] explain this idea and the following figure summarizes it: [![enter image description here][5]][5] The North pole in contrast is just in the middle of the Arctic ocean. You could indeed take ocean water there and turn it into icebergs. However, as others have said in the comments, using any kind of cooling system would produce a lot of heat so it would not be a good idea. But you can just enhance the heat transfer with the atmosphere as ski resorts do to make artificial snow. Their approach is to wait for a cold day and spray water into the air. If it is cold enough, the water droplets will turn into ice before falling back to the ground. However, even if you succeed in making icebergs, that would not make any change in sea level, because they are floating. It would be equivalent of melting of ice cubes in a glass, something that doesn't change the level of the liquid in the glass. Here a graphical example of that [![enter image description here][6]][6] Nevertheless, your feat of engineering would have a positive effect in slowing global warming by covering the ocean with a layer of highly reflective ice. That ice would reflect back to space a lot of sunlight that would have been absorbed by the ocean otherwise. However, when you freeze sea water, most of the salt is expelled, so you would also put a lot of salt into the water, that would make sea water more dense and it would sink. That could have a undesired effect on ocean circulation, so you have to be very careful in studying the side effects of such approach. Similar to the antarctic approach. You might get better results if you pump water from the Arctic ocean and let it freeze on top of a desolate arctic island. However, it still doesn't seem to be the most cost effective approach. Said that, there is a long list of geoengineering ideas to battle against climate change and sea level rise. However, the most cost-effective way to slowdown sea level rise, is to reduce the rate at which we are consuming stuff. So just buy less and reduce/repair more. Also very important is reducing the use of fossil fuels (something that would also be a side effect of consuming less). Having less children or adopting instead of having your own is also a way to make big contributions to slow down sea level rise. [1]: https://en.wikipedia.org/wiki/South_Pole [2]: https://i.stack.imgur.com/BojxT.png [3]: https://geology.com/world/antarctica-satellite-image.shtml [4]: https://www.the-cryosphere.net/12/2955/2018/ [5]: https://i.stack.imgur.com/waFBI.png [6]: https://i.stack.imgur.com/Os6IQ.gif

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\ begingroup美元这肯定是一个很好的解释。关于收养，我没有接触过权力，但我听说诺贝尔化学奖获得者马里奥·莫利纳在我的城市，他说有一个协议，不让人口增长太多。它会受到限制。我们应该做出反应，尝试新的能量 \ endgroup美元
- - - - - -user12525
2019年1月2日22:53

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像这样
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def函数(foo):
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' ' '
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_italic_或* *的* *
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