| 摘要: |
| 蒸发波导是海上大气波导中发生概率最高，对海上舰艇和岸基雷达探测系统影响最大的一种波导类型，研究意义重大。本文搭建了一种基于NPS诊断模型的新型蒸发波导数值预报模式，对我国南海海域2014年11月1日至5日的5天海上蒸发波导分别进行了数值模拟。利用数值模拟数据与岸基铁塔实测数据分别绘制蒸发波导高度随时间的变化曲线，并进行误差分析，显示模拟结果与实测结果变化规律基本一致，统计计算这5天的蒸发波导高度平均误差为1.289m。这表明了本模式的可行性及其存在的模拟偏差。此外，利用本预报模式对南海海域2011年整年的蒸发波导进行了数值模拟，得到了12个月的蒸发波导时空分布特征，分析总结的规律与其它文献的研究结论基本一致。 |
| 关键词: 蒸发波导 WRF模式 NPS模型 数值模拟 |
| DOI：10.11759/hykx20170320002 |
| 分类号:TN011.3 |
| 基金项目:海洋公益性行业科研专项（2014405006） |
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| Mesoscale numerical simulation of evaporation duct in the South China Sea based on NPS model |
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Wu Chao and Zhong Ying
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Tianjin University,Tianjin University
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| Abstract: |
| Evaporation duct has the highest occurrence compared to other types of atmospheric duct over sea. And it has the greatest impact on radar detection system on naval ships and along the shore, so it is very necessary to study evaporation duct. In this paper, a new numerical prediction model of evaporation duct based on NPS diagnostic model is proposed. The evaporation duct process over the South China Sea from November 1, 2014 to 5 (5 days) is simulated numerically with the new prediction model respectively. The simulation results are compared with tower observation data in the way: the comparison of the time-dependent curves of evaporation duct height and the error analysis. The results fit well and have a basically consistent variation. And the average error of evaporation duct height of the 5 days is 1.289m. It demonstrates the feasibility and simulation error of this model. Besides, the prediction model is used to simulate the evaporation duct over the South China Sea during the whole year of 2014. Spatial-temporal features of evaporation duct for 12 months are statistically analyzed and the conclusion of the analysis is consistent with the conclusions of other literatures. |
| Key words: evaporation duct WRF model NPS diagnostic model numerical simulation |