基于局地相似理论的蒸发波导计算方案及敏感性试验  

Computing Scheme and Sensitivity Analysis of the Evaporation Duct Model Based on the Local Similarity

作　　者：丁菊丽[1] 费建芳[1] 黄小刚[1] 周鑫[1,2] 

机构地区：[1]解放军理工大学气象学院,江苏南京211101 [2]91404部队,河北秦皇岛066200

出　　处：《海洋通报》2009年第1期86-95,共10页Marine Science Bulletin

基　　金：中国科学院大气物理研究所大气科学和地球流体力学国家重点实验室开放课题2709;中国气象局上海台风研究所开放课题2006STB02联合资助

摘　　要：蒸发波导是海洋环境中最常出现的异常大气折射结构,具有很高的利用价值。利用局地相似理论代替Monin-Obukhov相似理论来确定近地层温度、湿度垂直分布廓线,并借助热带海洋全球大气—海气耦合响应试验(TOGA COARE)中提出的总体通量算法,对Local模式和New的推导过程和算法设计进行了详细的阐述和说明。通过比较不同模式的计算结果和敏感性试验发现,在较强逆温和低风速(强稳定层结)条件下,除P-J模式外,基于Monin-Obukhov相似理论的蒸发波导模式计算的高度值均出现异常突变;而基于局地相似理论的Local模式能够有效抑制这种异常突变的现象,且与加入人为修正的P-J模式结果比较接近。New模式集Babin模式与Local模式的优点于一身,应该说是目前理论上最为完善的模式。Evaporation Duct is the most commonly occurring anomalous refraction structure over the ocean, which is of great value in application. In this paper, we show and clarify Local model and New model in detail, in which Local Similarity has been used instead of Monin-Obukhov similarity theory to determine the vertical profile of the potential temperature and humidity, and the scaling parameters have been obtained in virtue of a modified bulk flux algorithm developed by TOGA COARE （ Tropical Ocean Global Atmosphere Coupled Ocean-Atmosphere Response Experiment ）. Comparison of different models and sensitivity analysis shows that, in strong temperature inversion and low speed conditions, the evaporation duct heights obtained from all the models based on Monin-Obukhov similarity theory appear abnormity except P-J model （ by man-made modified ） On the contrary, Local model which based on the Local Similarity can restrain the abnormity effectively and give more reasonable results similar to the P-J model. New model which uses Local model in stable condition and Babin model in unstable condition seems to be the most perfect model in theory.

关 键 词：蒸发波导 局地相似理论 总体通量算法 Local模式 New模式 

分 类 号：P732[天文地球—海洋科学]