A DIAGNOSTIC RESEARCH OF THE SEASONAL NORTHWARD BEATING OF THE SUBTROPICAL HIGH |
| |
| Authors: | Zhu Yuxian and Yu Shihua |
| |
| Institution: | Air Force Institute of Meteorology, Nanjing, 211101;Air Force Institute of Meteorology, Nanjing, 211101 |
| |
| Abstract: | Diagnostic techniques of CEOF, power spectrum and bandpass filter wave are applied in this paper to analyze the seasonal northward beating of the northern subtropical high using day to day geopotential fields of 2.5 × 2.5 at 500 hPa May through July in 1988 and 1991. It is concluded that it is globally observed that the subtropical high has northward beats that propagate westward; the source of beating mainly lies in the region of Arabian Sea and central Pacific and the sink in eastern Pacific; the seasonal beating is dominated by effects of the disturbance field; low frequency oscillation plays a key role in the beating and the westward propagation so that the difference in the latter in individual years is caused by the varying source of disturbance and the low frequency waves it excites. |
| |
| Keywords: | subtropical high seasonal northward beating source and sink analysis of CEOF method low frequency oscillation |
|
| 点击此处可从《热带气象学报(英文版)》浏览原始摘要信息 |
| 点击此处可从《热带气象学报(英文版)》下载免费的PDF全文 |
