Modeling the morphogenesis of brine channels in sea ice.

Modeling the morphogenesis of brine channels in sea ice.
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模拟海冰中盐水通道的形态发生

DOI:
10.1103/physreve.81.036106
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发表时间:
2011
期刊:
Physical review. E, Statistical, nonlinear, and soft matter physics
影响因子:
--
通讯作者:
S. Gemming
S. Gemming
中科院分区:
--
文献类型:
--
作者:
B. Kutschan;K. Morawetz;S. Gemming

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盐水通道是在一定的限制条件下在海冰中形成的,代表了不同微生物的栖息地。这个复杂的系统取决于许多不同的量,如盐度、密度、pH值或温度。每一个量都控制着盐水通道的形成过程。存在着一个强有力的联系之间的散装盐度和盐水排水渠道的存在,在不断增长的冰相对于水平和垂直平面。我们开发了一个合适的唯象模型的形成盐水通道既指的是金斯堡-朗道相变理论,以及根据图灵的形态发生的化学基础。从临界波数可以推断出结构的尺寸和临界参数。理论推导的跃迁速率与实验值具有相同的量级。该模型创建了与实验观察到的尺寸相似的通道。该模型可以扩展到不同尺寸的通道。冰的微观结构决定了冰的反馈,因此在大尺度全球环流模式中起着重要的作用。
Brine channels are formed in sea ice under certain constraints and represent a habitat of different microorganisms. The complex system depends on a number of various quantities as salinity, density, pH value, or temperature. Each quantity governs the process of brine channel formation. There exists a strong link between bulk salinity and the presence of brine drainage channels in growing ice with respect to both the horizontal and vertical planes. We develop a suitable phenomenological model for the formation of brine channels both referring to the Ginzburg-Landau theory of phase transitions as well as to the chemical basis of morphogenesis according to Turing. It is possible to conclude from the critical wave number on the size of the structure and the critical parameters. The theoretically deduced transition rates have the same magnitude as the experimental values. The model creates channels of similar size as observed experimentally. An extension of the model toward channels with different sizes is possible. The microstructure of ice determines the albedo feedback and plays therefore an important role for large-scale global circulation models.
海冰:检查和分析盐水袋和渠道结构的铸造技术
DOI: --
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