标题： 海冰通过扩散驱动的脱盐老化 显示英文标题

标题： Sea ice aging by diffusion-driven desalination

摘要： 海冰是地球气候系统的关键组成部分，使其老化过程成为当前研究的重要焦点。 海冰的年龄与其热学和力学性质密切相关，这些性质决定了它与周围环境的相互作用。 在本研究中，我们结合实验技术和建模方法，探讨盐水中泡沫冰生长和自发老化的完整动力学过程，在自然对流系统中进行。 我们表明，当前系统中新形成的泡沫冰的老化过程，以孔隙度的逐渐长期降低为特征，是由扩散驱动的脱盐控制的。 此外，我们观察到系统最终会转变为紧致的淡水冰层，靠近一个充分混合的盐水区域。 在这种渐近状态下，冰层的形状被非多孔冰的数值模拟很好地捕捉到了。 我们的发现提高了对水溶液中相变复杂物理机制的理解，并为在实验室环境中研究海冰老化提供了一个框架，其影响涉及多种自然和工业应用。 显示英文摘要

摘要： Sea ice is a key component of the Earth's climate system, making its aging process an essential focus of current research. The age of sea ice is closely linked to its thermal and mechanical properties, which govern its interactions with the surrounding environment. In this study, we combine experimental techniques and modeling to explore the full dynamical process of mushy ice growth and spontaneous aging in saline water, within a natural convective flow system. We show that the aging of newly formed mushy ice in the present system, characterized by a gradual long-term reduction in porosity, is controlled by diffusion-driven desalination. Moreover, we observe that the system eventually transits into a dense freshwater ice layer adjacent to a well-mixed saline water region. The shape of the ice layer in this asymptotic state is well captured by numerical simulations of non-porous ice. Our findings improve the understanding of the complex physics governing phase changes in aqueous systems and provide a framework for studying sea ice aging in laboratory settings, with implications spanning diverse natural and industrial applications.