基于觀測(cè)系統(tǒng)模擬試驗(yàn)的雙雷達(dá)風(fēng)場(chǎng)反演算法評(píng)估

doi:10.12306/2024jms.0016

首頁(yè) > 過(guò)刊瀏覽>2025年第45卷第4期 >560-571. DOI:10.12306/2024jms.0016

基于觀測(cè)系統(tǒng)模擬試驗(yàn)的雙雷達(dá)風(fēng)場(chǎng)反演算法評(píng)估
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                        10.12306/2024jms.0016
                    
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中圖分類號(hào):P412.25
基金項(xiàng)目:海南省南海氣象防災(zāi)減災(zāi)重點(diǎn)實(shí)驗(yàn)室開(kāi)發(fā)基金資助項(xiàng)目(SCSF202202)

Evaluation of dual-Doppler radar wind retrieval methods based on observation system simulation experiment

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本文利用新一代中尺度數(shù)值模式(Weather Research and Forecasting model，WRF)模擬了一次強(qiáng)對(duì)流天氣過(guò)程，開(kāi)展了基于觀測(cè)系統(tǒng)模擬試驗(yàn)(Observation System Simulation Experiment，OSSE)的雙雷達(dá)風(fēng)場(chǎng)反演效果試驗(yàn)研究。基于WRF模式輸出的三維風(fēng)場(chǎng)，模擬兩部多普勒雷達(dá)的體掃數(shù)據(jù)，再利用迭代法和變分法進(jìn)行三維風(fēng)場(chǎng)反演，將模式輸出場(chǎng)作為真實(shí)風(fēng)場(chǎng)，定量計(jì)算反演風(fēng)場(chǎng)的風(fēng)速誤差，結(jié)合典型強(qiáng)對(duì)流個(gè)例的發(fā)生、發(fā)展過(guò)程，分析不同算法反演風(fēng)場(chǎng)的散度、渦度和垂直速度等特征。結(jié)果表明，兩種算法反演獲得的風(fēng)場(chǎng)結(jié)構(gòu)與強(qiáng)對(duì)流天氣過(guò)程的基本特征一致，變分法能更準(zhǔn)確地反演出強(qiáng)對(duì)流天氣過(guò)程的垂直速度、散度和渦度場(chǎng)，而迭代法反演的結(jié)構(gòu)特征不明顯，且強(qiáng)度明顯偏弱。

Abstract:

The accuracy and error characteristics of two dual-Doppler radar wind retrieval methods were evaluated by using Observation System Simulation Experiment (OSSE). A severe convective storm was simulated by the Weather Research and Forecasting model (WRF), and the model wind field was used as the true value to quantitatively calculate the errors of the retrieved wind field. Volumetric scans of reflectivity and radial velocity similar to operational radars were generated from the WRF output by placing virtual radars at different locations within the WRF domain. Three-dimensional wind fields were then retrieved from the simulated radar scans by the iterative and variational methods. The speed, divergence, vorticity, and vertical velocity fields in the retrieved wind were compared with the true wind at different periods of the lifecycle of the simulated convective storm. Results show that both methods were able to recover the basic characteristics of the wind fields. The variational method was able to better recover the vertical velocity, divergence, and vorticity fields of the convective storm, while those retrieved from the iterative method were either absent or too weak.

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羅銳瑩,唐曉文,鄭艷.基于觀測(cè)系統(tǒng)模擬試驗(yàn)的雙雷達(dá)風(fēng)場(chǎng)反演算法評(píng)估.氣象科學(xué),2025,45(4):560-571 LUO Ruiying, TANG Xiaowen, ZHENG Yan. Evaluation of dual-Doppler radar wind retrieval methods based on observation system simulation experiment. Journal of the Meteorological Sciences,2025,45(4):560-571

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收稿日期:2023-12-26
最后修改日期:2024-02-01
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在線發(fā)布日期: 2025-11-29
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