| SST對(duì)臺(tái)風(fēng)過(guò)程影響的敏感性試驗(yàn)——以“杰拉華”為例 |
| 作者:胡耀輝1 趙彪2 趙杰臣3 |
單位:1. 海軍北海艦隊(duì)海洋水文氣象中心, 山東 青島 266001; 2. 國(guó)家海洋局第一海洋研究所, 山東 青島 266061; 3. 國(guó)家海洋環(huán)境預(yù)報(bào)中心, 北京 100081 |
| 關(guān)鍵詞:SST 臺(tái)風(fēng) “杰拉華” 數(shù)值試驗(yàn) |
| 分類號(hào):P731.11;P444 |
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| 出版年·卷·期(頁(yè)碼):2019·36·第一期(76-85) |
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摘要:
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| 針對(duì)臺(tái)風(fēng)“杰拉華”過(guò)程,使用中尺度大氣模式(WRF),采用不同時(shí)間分辨率的TRMM/TMI海表面溫度觀測(cè)資料作為大氣模式底邊界條件,設(shè)計(jì)數(shù)值試驗(yàn),研究不同時(shí)間分辨率SST對(duì)臺(tái)風(fēng)模擬的影響;同時(shí),通過(guò)分析HadISST1資料得到東中國(guó)海近50aSST變化趨勢(shì),根據(jù)計(jì)算得到的SST(海表溫度)變化趨勢(shì)重構(gòu)SST,并以重構(gòu)的SST作為模式底邊界條件,通過(guò)定量分析水文要素的變化,研究臺(tái)風(fēng)“杰拉華”過(guò)程對(duì)重構(gòu)SST的響應(yīng)情況。數(shù)值試驗(yàn)結(jié)果表明:SST時(shí)間精度的提高對(duì)臺(tái)風(fēng)“杰拉華”的路徑后報(bào)誤差減小貢獻(xiàn)較小,但臺(tái)風(fēng)強(qiáng)度精度有明顯提高。在根據(jù)SST長(zhǎng)期變化趨勢(shì)改變SST條件后,海平面氣壓顯著降低,海面10m風(fēng)速、潛熱通量、波浪能密度明顯加大,有較明顯增幅。 |
| Using TRMM/TMI sea surface temperature (SST) data with different temporal resolution as bottom boundary condition, the Weather Research and Forecasting Model (WRF) is employed to investigate the impacts of SST temporal resolution on the simulation of typhoon "Jelawat". The variation trend of SST over the past 50 years in the East China Sea is deduced using HadISST1 data, based on which SST can be reconstructed. The reconstructed SST is used as the WRF bottom boundary condition to study the response of typhoon "Jelawat" by analyzing the variation of hydrological variables. The results of numerical experiment show that the increase of SST temporal resolution doesn't notably decrease the track error in "Jelawat" hindcast, whereas its accuracy of intensity is significantly increased. Taking the long-term SST trend into consideration, typhoon'Jelawat'is prominently strengthened. |
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參考文獻(xiàn):
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