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首页> 外文期刊>Proceedings of the National Academy of Sciences of the United States of America >Feasibility of cooling the Earth with a cloud of small spacecraft near the inner Lagrange point (L1)
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Feasibility of cooling the Earth with a cloud of small spacecraft near the inner Lagrange point (L1)

机译：在内部拉格朗日点（L1）附近用小型航天器云冷却地球的可行性

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摘要

If it were to become apparent that dangerous changes in global climate were inevitable, despite greenhouse gas controls, active methods to cool the Earth on an emergency basis might be desirable. The concept considered here is to block 1.8% of the solar flux with a space sunshade orbited near the inner Lagrange point (L1), in-line between the Earth and sun. Following the work of J. Early [Early, A (1989) J Br Interplanet Soc 42:567-569], transparent material would be used to deflect the sunlight, rather than to absorb it, to minimize the shift in balance out from L1 caused by radiation pressure. Three advances aimed at practical implementation are presented. First is an optical design for a very thin refractive screen with low reflectivity, leading to a total sunshade mass of approximate to 20 million tons. Second is a concept aimed at reducing transportation cost to
机译：如果尽管要控制温室气体，要使全球气候不可避免地发生危险的变化是显而易见的，那么在紧急情况下采取主动冷却地球的方法可能是可取的。这里考虑的概念是用一个在内部拉格朗日点（L1）附近，围绕地球和太阳的轨道环绕的空间遮阳帘来阻挡1.8％的太阳通量。继J. Early [Early，A（1989）J Br Interplanet Soc 42：567-569]的工作之后，将使用透明材料来偏转阳光，而不是吸收阳光，以最大程度地减少从L1出来的平衡偏移。由辐射压力引起。提出了针对实际实施的三项进展。首先是针对具有低反射率的超薄折射屏幕的光学设计，从而使遮阳总质量约为2000万吨。其次是旨在降低运输成本的概念

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