根据我国宁波台塑项目环境评估期间使用系留气艇对一次典型海陆风过程进行时间加密探测所获得的资料,分析了弱盛行风影响下海陆风环流的时空变化规律,并用分辨率为5km的wRF模式模拟了此次海陆风过程。观测结果表明,在成熟海风期间的高空存在明显的返回气流,所观测到的海风环流相当完整;陆风过程伴有下沉逆温层出现。数值模拟结果表明,海陆风的开始时间、持续时间与实测基本一致,海风期间的返回气流也清晰可见。
A case of land and sea breezes during 11--13 June 2005 over eastern Ningbo was observed using DigiCORA Tethersonds System and simulated using the Weather Research and Forecas (WRF) model with 5 km horizontal resolution. The observational results show that upper return currents were detected during the mature phase of sea breeze, and that the sea breeze circulation was complete, and that the land breeze was accompanied with a subsidence temperature inversion layer. Subjective analyses show that except for 11--13 June, the WRF-predicted onset time and duration of the land and sea breezes agree well with observations, and that there is a return flow aloft during the sea breeze.