| 渤海西岸一次副热带高压边缘暴雨特征分析 |
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| 引用本文： | 于志明,王驷鹞,史有瑜. 渤海西岸一次副热带高压边缘暴雨特征分析[J]. 中国农学通报, 2016, 32(25): 159-165. DOI: 10.11924/j.issn.1000-6850.casb16060013 |
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| 作者姓名： | 于志明 王驷鹞 史有瑜 |
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| 作者单位： | 唐山市气象局,唐山市气象局,唐山市气象局 |
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| 基金项目： | 环渤海区域科技协同创新基金项目“黄渤海雷暴大风监测及预警指标研究”(QYXM201502)；河北省气象局科研开发项目“秦皇岛海洋天气预报业务平台开发与试验”(ZC1303)。 |
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| 摘 要： | 为探究夏季西太平洋副热带高压边缘暴雨特征，改进暴雨天气预报模型和可预报因子，提高暴雨预报准确率。利用micaps、高低空风场、T639L60 物理量资料，对2010 年8 月4—5 日发生在渤海西岸的暴雨天气过程的环流形势、高低空急流、垂直速度、相对湿度特征进行分析。结果表明：副热带高压、西风槽和中低层切变线以及地面气旋是造成此次暴雨天气过程的影响系统，高空冷空气和低空暖湿空气在渤海西岸地区交汇触发了此次天气过程；高层辐散、低层辐合为空气上升运动提供了有力的动力条件，中低层的西南风急流和近地面层持续的偏东风为降水区提供了充沛的水汽；此次暴雨出现在副高588 dagpm 等值线与584 dagpm 等值线之间中低层存在切变线的位置和200 hPa 高空急流入口处的右侧、850 hPa 低空急流的左侧所对应区域；高低空急流增强、上干下湿的对流不稳定层结发展、空气上升运动增强、高层有干冷空气侵入、低层有较强暖湿空气输送预示将出现强降水天气；高低空急流减弱消失、低层暖湿空气输送减弱消失及干冷空气侵入低层预示强降水将减弱停止。
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| 关 键 词： | 渔业贷款 渔业贷款 渔业经济 VAR模型 Grange因果检验 渔业政策 |
| 收稿时间： | 2016-06-02 |
| 修稿时间： | 2016-06-17 |
Characteristics of a Heavy Rainfall on Subtropical High Edge in West Coast of Bohai |
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| Abstract: | The paper aims to study the characteristics of a heavy rainfall on the west pacific subtropical high edge in summer, and improve the heavy rainfall forecasting models and factors and promote the prediction accuracy. Using the data of micaps, upper and lower wind field and T639L60 variable, the circulation situation, upper-lower jet, vertical speed, relative humidity of a heavy rainfall during August 4-5, 2010 in the west coast of Bohai were analyzed. The results indicated that: subtropical high, westerly trough and low level shear line, surface cyclone formed the major effect system of this heavy rainfall, the intersection of high altitude cold air and low warm wet air at west coast of Bohai touched off the heavy rainfall; low level convergence and high level divergence offered dynamic conditions, low level southwesterly jet and surface continuous easterly winds offered abundant moisture; this heavy rainfall occurred between 584 dagpm and 588 dagpm contour line of subtropical high where low level shear line existed, right side of 200 hPa high level jet and left side of 850 hPa low level jet; enhancing of high level jet, developing of instable convection stratification, enhancing of atmospheric lifting movement, invading of high level cold dry air, importing of low level warm wet air indicated heavy rainfall; weakening of high and low level jet, disappearing of low level warm wet air, invading of low level cold dry air indicated precipitation disappearing. |
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| Keywords: | coast heavy rainfall Subtropical high jet T639 variable |
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