تقرير
Surface phase transitions and crystal growth rates of ice in the atmosphere
| العنوان: | Surface phase transitions and crystal growth rates of ice in the atmosphere |
|---|---|
| المؤلفون: | Llombart, Pablo, Noya, Eva G., MacDowell, Luis G. |
| المصدر: | Sci. Adv. 6, eaay9322 (2020) |
| سنة النشر: | 2020 |
| المجموعة: | Condensed Matter Physics (Other) |
| مصطلحات موضوعية: | Physics - Atmospheric and Oceanic Physics, Condensed Matter - Materials Science, Condensed Matter - Statistical Mechanics |
| الوصف: | With climate modeling predicting a raise of at least 2 C by year 2100, the fate of ice has become a serious concern, but we still do not understand how ice grows (or melts). In the atmosphere, crystal growth rates of basal and prismatic facets exhibit an enigmatic temperature dependence, and crossover up to three times in a range between 0 and -40 C. Here we use large scale computer simulations to characterize the ice surface and identify a sequence of novel phase transitions on the main facets of ice crystallites. Unexpectedly, we find that as temperature is increased, the crystal surface transforms from a disordered phase with proliferation of steps, to a smooth phase with small step density. This causes the anomalous increase of step free energies and provides the long sought explanation for the enigmatic crossover of snow crystal growth rates found in the atmosphere. Comment: 21 pages, 4 figures + supplementary material. A revised version to appear in Science Advances (In press) under a CC-BY license |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1126/sciadv.aay9322 |
| URL الوصول: | http://arxiv.org/abs/2004.10465 |
| رقم الأكسشن: | edsarx.2004.10465 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1126/sciadv.aay9322 |
|---|