一次天气尺度扰动过程对东海北部大气边界层垂直结构的影响

发布时间：2018-06-11 17:55

本文选题：GPS探空 + 海洋大气边界层　；参考：《中国海洋大学学报(自然科学版)》2016年04期

【摘要】：利用2013年6月船载GPS探空、云高仪资料,结合ERA-Interim再分析资料、卫星资料,分析一次天气尺度扰动(锋面过境)过程对东海北部海洋大气边界层(MABL)垂直结构的影响。结果表明:受梅雨锋影响,航测区域上空在整个过程中都有低云覆盖,MABL没有呈现日变化特征;当MABL为稳定边界层时,锋面与站位距离越近,站位上空增强的上升运动导致MABL高度越高。梅雨锋过境前后云层之上都覆盖有较为稳定的逆温层,受锋面抬升作用,云底高度和云顶逆温层高度在锋面过境后高度变高;锋面过境导致航测区域上空700hPa以下大气的上升运动增强,水汽上升到更高位置,云底从MBAL中脱离。锋面过境后,3 000m以下整层大气相对湿度较大,大气层结退耦的产生导致云分层形成高度不同的多层云。
[Abstract]:The influence of a synoptic scale disturbance (frontal transit) process on the vertical structure of MABLs in the northern part of the East China Sea is analyzed by using the shipborne GPS sounding and the cloud-altimeter data in June 2013, combined with ERA-Interim reanalysis data and satellite data. The results show that under the influence of Meiyu front, there is no diurnal variation of MABL over the aerial survey area during the whole process, and when MABL is a stable boundary layer, the distance between the front and the station is closer. Increased upward movement over the station results in a higher MABL height. Before and after the Meiyu front transit, there is a relatively stable inversion layer on the top of the cloud, and the height of the cloud bottom and the inversion layer of the top of the cloud become higher after the front crossing by the action of the front uplift. The frontal transit results in the rising motion of the atmosphere below 700 HPA over the aerial survey area, the rise of water vapor to a higher position, and the departure of the cloud bottom from MBAL. After the frontal transit, the relative humidity of the whole layer below 3000 m is larger, and the formation of stratification and decoupling of the atmosphere leads to the formation of multi-layer clouds with different height.
【作者单位】：中国海洋大学物理海洋教育部重点实验室山东省高校海洋-大气相互作用与气候重点实验室;中国酒泉卫星发射中心;
【基金】：国家自然科学基金项目(411750006)资助~~
【分类号】：P732

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