论文标题
表面粗糙度在月球上水解吸模型中的含义
Implications of Surface Roughness in Models of Water Desorption on the Moon
论文作者
论文摘要
在时代的月球雷果石中观察到的水分子是一个意想不到的发现，并且仍然了解不足。标准的热物理模型预测温度太高，无法吸附水稳定。我们建议这个问题可能是由于在此类模型中常见的局部平坦表面的假设引起的。在这里，我们应用了一个明确考虑表面粗糙度的模型，并说明了太阳照明，通过地形，自热，热辐射和热传导施放的阴影。我们将热物理模型与月球地表水的一阶解吸模型相结合，并证明表面粗糙度大大提高了月亮在任何纬度的阳光半球上保留水的能力，并且在$ 45^{\ circ} $之内，在圆盘的任何时候。因此，我们表明月球表面粗糙度对月球水的吸附和解吸具有很大的影响。因此，重要的是要考虑表面粗糙度，以准确了解月球表面和外层中的水量。
The observed presence of water molecules in the dayside lunar regolith was an unexpected discovery and remains poorly understood. Standard thermophysical models predict temperatures that are too high for adsorbed water to be stable. We propose that this problem can be caused by the assumption of locally flat surfaces that is common in such models. Here we apply a model that explicitly considers surface roughness, and accounts for solar illumination, shadows cast by topography, self-heating, thermal reradiation, and heat conduction. We couple the thermophysical model to a model of first-order desorption of lunar surface water and demonstrate that surface roughness substantially increases the capability of the Moon to retain water on its sunlit hemisphere at any latitude, and within $45^{\circ}$ of the poles, at any time of the lunar day. Hence, we show that lunar surface roughness has a strong influence on lunar water adsorption and desorption. Therefore, it is of critical importance to take account of surface roughness to get an accurate picture of the amount of water on the Moon's surface and in its exosphere.
