| 静水生长的淡水湖冰微结构的季节变化及其受生长过程的影响 |
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| 引用本文： | 黄文峰,李志军,韩红卫,贾青.静水生长的淡水湖冰微结构的季节变化及其受生长过程的影响[J].冰川冻土,2016,38(3):699-707. |
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| 作者姓名： | 黄文峰 李志军 韩红卫 贾青 |
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| 作者单位： | 长安大学 旱区地下水文与生态效应教育部重点实验室，陕西 西安 710054;长安大学 环境科学与工程学院，陕西 西安 710054;大连理工大学 海岸与近海工程国家重点实验室,辽宁 大连,116024;黑龙江大学 水利电力学院,黑龙江 哈尔滨,150080 |
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| 基金项目： | 国家自然科学基金项目(41402203；41376186)；冻土工程国家重点实验室开放基金项目(SKLFSE201202)；陕西省博士后科研项目(2015年度) |
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| 摘 要： | 冰物理微结构特征控制着冰层基本物理性质.基于多年冬季对东北平原区水库和湖泊冰层生消过程、气象条件,以及冰层晶体、冰内气泡和密度特征的现场观测,分析了淡水湖冰微结构的季节演化和年变化规律及其影响因素.湖冰晶体结构、气泡含量与分布、冰密度具有明显的分层结构,且在冰厚增长期和稳定期内基本维持不变;进入融化期,冰内微结构变化迅速,表现为晶体边界融化、气泡体积扩展和融水迁移.不同年份、不同湖泊冰晶体类型和气泡形态类似,但各类晶体层厚度比例、气泡含量与尺寸存在差异.统计分析显示,晶体和气泡结构与湖冰生长速率关系密切,晶体粒径与生长速率呈正比,水内气体的产生和溶解过程、水体扰动程度的差异影响着气泡含量同生长速率之间的关系.
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| 关 键 词： | 湖冰 晶体 气泡 季节变化 生长速率 |
Seasonal evolution of static freshwater lake ice microstructures and the effects of growth processes |
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| HUANG Wenfeng,LI Zhijun,HAN Hongwei,JIA Qing.Seasonal evolution of static freshwater lake ice microstructures and the effects of growth processes[J].Journal of Glaciology and Geocryology,2016,38(3):699-707. |
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| Authors: | HUANG Wenfeng LI Zhijun HAN Hongwei JIA Qing |
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| Abstract: | The physical structure dominates other physical properties of lake ice. The lake ice processes,crystal structures,air bubbles,densities,and local meteorology were investigated in a reservoir and a lake in northeast-ern plain for several winters in order to determine the seasonal and annual variations of lake ice microstructure and its influencing factors. It is found that the crystalline structure,air bubble content and distribution,and ice density have distinct vertical stratification,and does not change significantly during the ice growth. However, when the melting season comes,everything changes rapidly,such as crystal boundary melting,air bubble ex-panding,and meltwater transporting. Ice covers resemble each other in crystal types and air bubble shapes,but differ in thickness percentage of each crystal type and the content and size of air bubble in different regions or winters. Statistically,the ice crystal size increases with increasing growth rate,but the generating and dissolving processes of air in water and the water agitation influence the relationship of gas content with ice growth rate. |
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| Keywords: | lake ice crystal air bubble seasonal evolution growth rate |
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