CAJ | 학술논문

回顾了近年来由单多普勒雷达观测反演风场的各种方法.这些方法大部分基于线性假设,因此风场的非线性变化经常影响反演结果,使得反演的风场误差增大.我们提出一种以非线性近似理论为基础的反演方法,该方法主要考虑了风场分片光滑的特点并充分利用了雷达的径向风场数据.我们把该方法应用到1998年淮河能量与水循环实验的两个个例中.通过同双多普勒雷达观测的结果比较,发现该方法能反演较高分辨率和准确性的水平风场,反演的垂直风场也比较合理.
회고료근년래유단다보륵뢰체관측반연풍장적각충방법.저사방법대부분기우선성가설,인차풍장적비선성변화경상영향반연결과,사득반연적풍장오차증대.아문제출일충이비선성근사이론위기출적반연방법,해방법주요고필료풍장분편광활적특점병충분이용료뢰체적경향풍장수거.아문파해방법응용도1998년회하능량여수순배실험적량개개례중.통과동쌍다보륵뢰체관측적결과비교,발현해방법능반연교고분변솔화준학성적수평풍장,반연적수직풍장야비교합리.
The methods employed in recent years to retrieve vector wind information from single-Doppler radar observation are reviewed briefly. These methods are based on a linearity hypothesis for the wind field, so the retrieved wind field is sometimes negatively affected by the non-linearity of wind. This paper proposes a new method based on a non-linear approximation technique. This method, which relies on the piecewise smooth property of the wind field and makes full use of the radar velocity data, is applied to two cases of the Huaihe River Basin Energy and Water Cycle Experiment (HUBEX) in 1998. Checked against the wind field observed by dual-Doppler radar, the retrieved wind field by the method presented in this paper yields a relatively accurate horizontal vector wind field with high resolution, as well as a reasonable estimate of the magnitude of vertical velocity.