本文選題：南海海浪 + ENSO　； 參考：《華北電力大學(xué)》2014年碩士論文

【摘要】：本文利用歐洲中尺度天氣預(yù)報(bào)中心提供的高分辨率再分析數(shù)據(jù)集ERA-Interim資料中的風(fēng)場(chǎng)和混合浪海浪場(chǎng)有效波高、波向數(shù)據(jù),分析1979-2012年南海海浪場(chǎng)的時(shí)空變率特征,著重分析冬季(1979/80-2011/12年)的變化特征,并揭示了厄爾尼諾南方濤動(dòng)(ENSO)影響南海冬季海浪的物理機(jī)制。結(jié)果表明：南海冬季有效波高的主導(dǎo)模態(tài)存在顯著的年代際和年際變化特征,空間模態(tài)呈海盆一致模,異常中心位于呂宋海峽西側(cè)。在年代際尺度上,有效波高從負(fù)位相轉(zhuǎn)變?yōu)檎幌嘀饕芴窖笫隄齽?dòng)(PDO)對(duì)東亞冬季風(fēng)的調(diào)制作用影響；年代際尺度上,波高變率與前秋和同期的ENSO有很顯著的負(fù)相關(guān)性。為了更好地探究南海海浪變率與ENSO的關(guān)系,我們進(jìn)一步對(duì)大氣環(huán)流做了相應(yīng)分析,證明了ENSO通過(guò)南海冬季風(fēng)和對(duì)流層底層的太平洋-東亞遙相關(guān)影響南海海浪。在EI Nino (La Nina)年,西太平洋被菲律賓海的異常反氣旋(氣旋)覆蓋,削弱(增強(qiáng))了東亞冬季風(fēng)從而導(dǎo)致南海海浪異常偏低(偏高)。 海浪數(shù)值模擬一直是海浪研究的重要方面,近年來(lái)已經(jīng)發(fā)展到比較成熟的階段。本論文最后利用第三代海浪數(shù)值模式(Wave Watch Ⅲ),以高精度QSCAT/NCEP混合風(fēng)場(chǎng)為模式輸入風(fēng)場(chǎng),模擬了2008年的南海海浪場(chǎng)。模式輸出結(jié)果基本能反映南海海浪場(chǎng)的氣候態(tài)特征。進(jìn)一步分析模擬結(jié)果可知,輸入風(fēng)場(chǎng)的精度與模式模擬結(jié)果有密切的關(guān)系,風(fēng)場(chǎng)精度的提高可以很大程度上改善模擬結(jié)果。
[Abstract]:In this paper, the data of effective wave height and wave direction of wind field and mixed wave field in the ERA-Interim data set of high resolution reanalysis data provided by the European Mesoscale Weather Forecast Center are used to analyze the temporal and spatial variability characteristics of the wave field in the South China Sea from 1979 to 2012. This paper analyzes the variation characteristics of winter ocean waves in 1979 / 80-2011 / 12, and reveals the physical mechanism of ENSO (El Nino Southern Oscillation) affecting the winter waves in the South China Sea. The results show that the dominant modes of the effective wave height in the South China Sea in winter have significant interdecadal and interannual variations. The spatial mode is a consistent model of the sea basin and the anomalous center is located on the west side of the Luzon Strait. On the Interdecadal scale, the effective wave height transition from negative to positive phase is mainly influenced by the modulation of the East Asian winter monsoon by the Pacific decade Oscillation (PDO), and on the Interdecadal scale, there is a significant negative correlation between the wave height variability and the ENSO in the previous autumn and the same period. In order to better explore the relationship between wave variability and ENSO in the South China Sea, we further analyze the atmospheric circulation and prove that ENSO influences the South China Sea waves through the Pacific Ocean teleconnection between the South China Sea winter monsoon and the troposphere bottom. In ei Nino La Nina, the western Pacific Ocean was covered by anomalous anticyclones (cyclones) in the Philippine Sea, which weakened (strengthened) the East Asian Winter Monsoon, thus causing the South China Sea waves to be abnormally low (high). Wave numerical simulation has been an important aspect of ocean wave research, and has developed to a relatively mature stage in recent years. In the end of this thesis, the third generation wave numerical model is used to simulate the South China Sea wave field in 2008 by using the high precision QSCAT/NCEP mixed wind field as the input wind field. The model output can basically reflect the climate characteristics of the South China Sea wave field. Further analysis of the simulation results shows that the precision of the input wind field is closely related to the results of the model simulation, and the improvement of the accuracy of the wind field can improve the simulation results to a great extent.
【學(xué)位授予單位】：華北電力大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：P731.2

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本文編號(hào)：1926793