In this paper a method of geoengineering is proposed involving clouds of dust placed in the vicinity of the L1 point as an alternative to the use of thin film reflectors. The aim of this scheme is to reduce the manufacturing requirement for space-based geoengineering. It has been concluded that the mass requirement for a cloud placed at the classical L1 point, to create an average solar insolation reduction of 1.7%, is 7.60x1010 kg yr−1 whilst a cloud placed at a displaced equilibrium point created by the inclusion of the effect of solar radiation pressure is 1.87x1010 kg yr−1. These mass ejection rates are considerably less than the mass required in other unprocessed dust cloud methods proposed and are comparable to thin film reflector geoengineering requirements. Importantly, unprocessed dust sourced in-situ is seen as an attractive scheme compared to highly engineered thin film reflectors. It is envisaged that the required mass of dust can be extracted from captured near Earth asteroids, whilst stabilised in the required position using the impulse provided by solar collectors or mass drivers used to eject material from the asteroid surface.
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机译:在本文中,提出了一种地球工程方法,该方法涉及在L1点附近放置尘埃云,作为使用薄膜反射器的替代方法。该方案的目的是减少基于空间的地球工程的制造需求。得出的结论是,放置在经典L1点处的云的质量要求为7.60x1010 kg yr-1,以使平均日照减少量达到1.7%,而放置在位移平衡点处的云由于包含了以下成分而产生:太阳辐射压力的影响为1.87x1010 kg yr-1。这些质量喷射速率大大低于提议的其他未处理粉尘云方法所需的质量,可与薄膜反射器地球工程要求相媲美。重要的是,与高度设计的薄膜反射器相比,原位未经处理的粉尘被视为一种有吸引力的方案。可以设想,可以从附近的地球小行星上捕获的尘埃中提取所需的尘埃,同时使用太阳能收集器或用于从小行星表面喷出物质的质量驱动器提供的脉冲,将所需的尘埃稳定在所需的位置。
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