基于WRF模式预报的微波湍流特性研究

赵慧; 张守宝; 王红光; 刘萱; 林乐科; 张银辉; 蔡文炳

doi:10.12265/j.cjors.2021034

基于WRF模式预报的微波湍流特性研究

doi: 10.12265/j.cjors.2021034

赵慧^1, ,,
张守宝^1,,
王红光^1,,
刘萱^1,,
林乐科¹,
张银辉²,
蔡文炳²

1.
中国电波传播研究所青岛 266107
2.
北京跟踪与通信技术研究所北京 100094

基金项目: 院士基金项目（A172003Y06）；国家自然科学基金（61971385，61901424）；稳定支持项目（A131901W14）

详细信息

作者简介:
赵慧：（1988—），女，宁夏人，中国电波传播研究所工程师，博士，研究方向为电波环境和传播特性研究

张守宝：（1985—），男，山东人，中国电波传播研究所高级工程师，硕士，研究方向为大气波导传播

王红光：（1980—），男，河南人，中国电波传播研究所高级工程师，博士，研究方向为电波环境和传播特性研究

通讯作者:
赵慧 E-mail：zhaohui0806@126.com

中图分类号: TN011.3
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- 文章访问数: 137
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- 被引次数: 0
出版历程
- 收稿日期: 2021-02-04
- 网络出版日期: 2021-06-24

Research on the turbulence characteristics in microwave band based on WRF forecasting model

1.
China Research Institute of Radiowave Propagation, Qingdao 266107, China
2.
Beijing Institute of Tracking and Telecommunication Technology, Beijing 100094, China

摘要

摘要: 大气湍流对对流层内微波的传播具有重要影响，正确认识大气湍流的特性有助于提高电波传播模型预测的准确性和可靠性. 本文利用天气数值预报（weather research and forecasting,WRF）模式预测气象要素，计算微波波段大气折射率结构常数，研究对流层内大气湍流的时空分布特性，并探讨其与温度、相对湿度和修正大气折射率的变化关系. 研究表明：近海面微波湍流强度具有明显的日变化特征；对流层内微波湍流的垂向结构具有较为明显的分层；大气环境出现逆温减湿现象，湍流活动较强. 这些研究成果可为微波在大气环境中传播的准确预测提供理论支持.
- 大气湍流 /
- 大气折射率结构常数 /
- 天气数值预报（WRF) /
- 时空分布
Abstract: Atmospheric turbulence plays an important role in the propagation of microwave in troposphere. A better knowledge for the characteristics of atmospheric turbulence is helpful to improve the accuracy and reliability of radio wave propagation model simulation. In this paper, the meteorological parameters are forecasted by the WRF model, and used to calculate the structure constant of atmospheric refractive index in microwave band. Based on the structure constant of refractive index, the temporal and spatial distribution characteristics of atmospheric turbulence in troposphere are studied, and the correlation between turbulence and atmospheric parameters is discussed. The results show that the turbulence intensity near the sea surface has obvious diurnal variation characteristics; the vertical structure of turbulence in the troposphere is stratified; the phenomenon of temperature inversion and humidity reduction in atmospheric environment may cause strong turbulence. These results provide theoretical support for the accurate prediction of microwave propagation in the atmospheric environment.
- atmospheric turbulence /
- structure constant of atmospheric refractive index /
- WRF model /
- spatial-temporal distribution

HTML全文

图 1 模拟区域示意图

Fig. 1 Schematic diagram of model domain

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图 2 温度T、相对湿度${\boldsymbol{U}}$和气压预报数据P与探空数据对比

Fig. 2 Comparison of temperature T, relative humidity ${\boldsymbol{U}}$ and air pressure P forecast data with sounding data

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图 3 折射率结构常数随时间变化的高度剖面

Fig. 3 Structure constant of atmospheric refractive index profile

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图 4 近海面折射率结构常数随时间变化曲线

Fig. 4 Structure constant of atmospheric refractive index curve with time near the sea surface

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图 5 折射率结构常数随高度变化的等值线剖面

Fig. 5 Structure constant of atmospheric refractive index contour profile with height

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图 6 修正折射率M，大气折射率结构常数${\boldsymbol{C}}_{\boldsymbol{n}}^2$，温度T和相对湿度${\boldsymbol{U}}$随高度变化曲线

Fig. 6 Modified refractive index M, structure constant of atmospheric refractive index ${\boldsymbol{C}}_{\boldsymbol{n}}^2$, temperature T and relative humidity U vs. height

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图 7 修正折射率M和大气折射率结构常数${\boldsymbol{C}}_{\boldsymbol{n}}^2$随高度变化曲线

Fig. 7 Modified refractive index M and structure constant of atmospheric refractive index $ {\boldsymbol{C}}_{\boldsymbol{n}}^2$ vs. height

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图 8 修正折射率M和大气折射率结构常数${\boldsymbol{C}}_{\boldsymbol{n}}^2$随高度变化的时间剖面

Fig. 8 Modified refractive index M and structure constant of atmospheric refractive index ${\boldsymbol{C}}_{\boldsymbol{n}}^2$ profiles with time vs. height

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