论文标题
使用从伽利略图像获得的地形，对欧罗巴的冰冷岩爆发的限制
Constraints on effusive cryovolcanic eruptions on Europa using topography obtained from Galileo images
论文作者
论文摘要
伽利略固态成像仪（SSI）拍摄的欧罗巴表面的图像显示了几公里的光滑特征，这可能是由于低粘度材料（如液体冷冻量）的喷发而产生的。我们通过产生四个伽利略/SSI图像的数字高程模型（DEM）来估算这些平滑特征中的四个的体积。 We used the shape-from-shading technique with special care to estimate the uncertainties on the produced DEMs and estimated feature volumes to be between ($5.7*10^{7}$ m$^{3}$ and ($2.7*10^{8}$ m$^{3}$. We discussed the implications for putative sub-surface liquid reservoir dimensions in the case of eruptions induced from冻结储层。我们以前的Cryovolcanic爆发模型通过考虑冷冻冻结和积液的循环，并估计Cryolava一旦Cryolava扩散到欧罗巴的表面上，我们的表面就会表明这些平滑特征是$ 100 km。爆发和0.4至60 km $^{3} $用于产生周期性爆发的整个寿命）。欧罗巴。
Images of Europa's surface taken by the Galileo Solid State Imager (SSI) show smooth features measuring a few kilometers, potentially resulting from eruptions of low-viscosity material such as liquid cryomagma. We estimated the volume of four of these smooth features by producing digital elevation models (DEMs) of four Galileo/SSI images. We used the shape-from-shading technique with special care to estimate the uncertainties on the produced DEMs and estimated feature volumes to be between ($5.7*10^{7}$ m$^{3}$ and ($2.7*10^{8}$ m$^{3}$. We discussed the implications for putative sub-surface liquid reservoir dimensions in the case of eruptions induced from freezing reservoirs. Our previous cryovolcanic eruption model was improved by considering a cycle of cryomagma freezing and effusion and by estimating the vaporized cryolava fraction once cryolava spreads onto Europa's surface. Our results show that the cryomagma reservoirs would have to be relatively large to generate these smooth features (1 to 100 km$^{3}$ if the flow features result from a single eruption, and 0.4 to 60 km$^{3}$ for the full lifetime of a reservoir generating cyclic eruptions). The two future missions JUICE (ESA) and Europa Clipper (NASA) should reach Europa during the late 2020s. They shall give more information on those putative cryovolcanic regions which appear as interesting targets that could provide a better understanding of the material exchanges between the surface, sub-surface and ocean of Europa.
