| 新疆巴音布鲁克区域干雪及风吹雪介电常数对温度和低频频率的响应 |
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| 引用本文： | 杨金明,宋芳,刘洋,王大环,牛春霞,刘志辉.新疆巴音布鲁克区域干雪及风吹雪介电常数对温度和低频频率的响应[J].冰川冻土,2016,38(3):708-713. |
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| 作者姓名： | 杨金明 宋芳 刘洋 王大环 牛春霞 刘志辉 |
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| 作者单位： | 1. 新疆大学 资源与环境科学学院, 新疆 乌鲁木齐 830046;2. 新疆大学 教育部绿洲生态重点实验室, 新疆 乌鲁木齐 830046;3.新疆大学 干旱生态环境研究所, 新疆 乌鲁木齐 830046;4. 干旱半干旱区可持续发展国际研究中心, 新疆 乌鲁木齐 830046;5. 伊犁师范学院 物理科学与技术学院, 新疆 伊宁 835000 |
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| 基金项目： | 国家自然科学基金项目(41171023)；国家科技支撑计划项目子课题(2012BAC23B01) |
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| 摘 要： | 积雪是干旱半干旱区珍贵的可再生水资源，因此许多研究机构和人员将西北地区积雪特性的研究视为重点，然而对积雪介电常数的研究仍很少。积雪介电常数是建立积雪特性反演模型和雪水资源评估的基础，也是雪灾防灾减灾工作的辅助信息。为了研究不同雪层干雪和风吹雪介电常数与温度和频率之间的关系，使用I-V方法测量了巴音布鲁克区域干雪表、中、底层雪和风吹雪在1Hz~1MHz低频范围，-30~0℃温度区间内介电常数的实部和虚部。结果表明在1Hz~1MHz频率范围内干雪及风吹雪的介电常数与温度和频率有关；其中介电常数实部与虚部对温度和频率的响应相似，但虚部对温度的响应更加敏感；同时介电常数对温度的响应要比对频率的响应明显。最后得出了干雪表、中、底层雪和风吹雪介电常数实部与温度之间的线性关系，R2均大于0.85。
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| 关 键 词： | 低频 干雪 风吹雪 介电常数 |
| 收稿时间： | 2016-02-07 |
| 修稿时间： | 2016-04-29 |
Response of dielectric constant of dry snow and snow drift to temperature in low measuring frequency range in Bayinbuluk,Xinjiang Region |
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| YANG Jinming,SONG Fang,LIU Yang,WANG Dahuan,NIU Chunxia,LIU Zhihui.Response of dielectric constant of dry snow and snow drift to temperature in low measuring frequency range in Bayinbuluk,Xinjiang Region[J].Journal of Glaciology and Geocryology,2016,38(3):708-713. |
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| Authors: | YANG Jinming SONG Fang LIU Yang WANG Dahuan NIU Chunxia LIU Zhihui |
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| Abstract: | Snow is precious renewable water resources in arid and semi-arid regions. Consequently,many insti-tutions and researchers have focused on researching the characteristics of snow in Northwest China,but less at-tention has been put to researching dielectric constant of snow. The dielectric constant of snow is the foundation to establish inversion model of snow characteristics and to assess snow water resources,as well as to get the aux-iliary information for preventing and mitigating snow disasters. I-V method was adopted to measure the dielectric constant’s real and imaginary components of dry snow at surface,middle and bottom,as well as of snow drift, in Bayinbuluk under measuring frequency range of 1 Hz~1 MHz and at-30~0℃,in order to establish the rela-tionships between dielectric constant of dry snow,snow drift at different snow depths and temperatures and mea-suring frequencies,respectively. The result showed that dielectric constant of dry snow and snow drift is related to temperature and measuring frequency ranging from 1 Hz to 1 MHz;meanwhile,the response of dielectric con-stant’s imaginary parts to temperature and measuring frequency is a little more sensitive than that of the real parts. However,dielectric constant’s response to temperature is more obvious than that to measuring frequency. At last,the linear relationships between temperature and the real parts of dielectric constant of dry snow at sur-face,middle and bottom,as well as snow drift,are obtained,with R2 greater than 0.85. |
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| Keywords: | low frequency dry snow snow drift dielectric constant |
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