留学生天文学代写 火星气候

Keywords:留学生天文学代写 火星气候

著名科学家卡尔·萨根是利用反照率效应使火星气候变暖的支持者。他提出，在一个多世纪的时间里，将109吨的黑暗物质运送到极地冰盖，可以增加吸收太阳辐射来融化冰盖。他建议使用多种材料，从火卫一或火卫二的黑暗尘埃到能在雪中生存的黑暗地衣。虽然在理论上很简单，但在目前的技术条件下，在太空中运输这么多材料的过程是不可行的。由美国国家航空航天局(NASA)领导的一个合作团队发表了一篇论文，提出了利用磁屏蔽来保护火星大气层免受太阳风影响的可能性。通过在火星的L1拉格朗日点形成一个磁偶极子场，这个行星就会处于一个人造磁气圈中。随着技术的进步，建造一个能产生2特斯拉磁场的充气结构来保护火星不受太阳风的影响也并非不可能。所引起的磁气圈将减少气体的逸出，增加压力和温度。据推测，气温升高4度可能导致占古代海洋近七分之一的极地冰盖的水融化。该研究小组认为，任何在不减少太阳风造成的大气逃逸的情况下对火星进行地球化的努力，从长远来看都是不可行的。随着来自火星实验的新数据不断涌现，我们对火星大气的了解与日俱增。火星在太阳系的“适居带”内，但仍然有非常不利于人类太空任务的大气层。平均表面温度为210k，压力为0.636 kPa，如果没有保护，大气是无法生存的。人们提出了许多通过诱发全球变暖来改造地球大气层的方法。虽然在理论上可行，但在目前的工程实践和技术条件下，没有一种方法是可行的。
留学生天文学代写 火星气候
Famous scientist Carl Sagan was proponent of utilizing the albedo effect as a method of warming the Martian climate. He proposed that transporting 109 tons of dark material to the polar ice caps over a century could increase the absorption of solar radiation to melt the ice caps. He suggested multiple materials that could be used from the dark dust of Phobos or Deimos to dark lichens that could survive on snow. Although simple in theory the process of transporting that much material in space in not feasible with current technology. A collaborative team headed by NASA published a paper proposing the possibility of a magnetic shield to protect mars’ atmosphere from solar wind. By creating a magnetic dipole field at mars’ L1 Lagrange point the planet would be within an artificial magnetosphere. With advancing technologies it is not improbable to build an inflatable structure capable of producing a 2 Tesla field which could shield mars from solar wind. The induced magnetosphere would reduce the escape of gasses increasing pressure and temperature. It is hypothesized that a four degree increase in temperature could lead to melting of water in the polar ice caps which is nearly 1/7th of the ancient oceans. The team believes that any effort to terraform mars without reducing the atmospheric escape caused by solar wind is infeasible in the long term.The Martian atmosphere is well studied with our knowledge growing daily as new data comes in from mars experiments. Mars is within the solar systems “Goldilocks” zone but still has a very inhospitable atmosphere for human space missions. With an average surface temperature of 210 K and pressure 0.636 kPa the atmosphere is not survivable without protection. Many methods have been proposed to terraform the planet’s atmosphere through induced global warming. Although theoretically possible no proposed methods are feasible with current engineering practices and technology.