本文關(guān)鍵詞：北大西洋海溫異常對(duì)廣義東亞夏季風(fēng)和印度夏季風(fēng)交界面年際變化的影響機(jī)制　出處：《云南大學(xué)》2016年博士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 東亞夏季風(fēng)與印度夏季風(fēng)交界面 年際變化 北大西洋三極型 廣義位溫 EASM ISM

【摘要】：東亞夏季風(fēng)與印度夏季風(fēng)交界面是表征亞洲夏季風(fēng)兩個(gè)子系統(tǒng)(東亞夏季風(fēng)與印度夏季風(fēng))相互作用的重要指標(biāo)之一。其年際變化對(duì)理解和預(yù)測(cè)亞洲夏季風(fēng)環(huán)流及其降水具有重要意義。本文首先在前人研究工作的基礎(chǔ)上,對(duì)東亞夏季風(fēng)與印度夏季風(fēng)交界面進(jìn)行了改進(jìn),提出了基于廣義位溫定義下的東亞夏季風(fēng)與印度夏季風(fēng)交界面GIIE,并獲得了相應(yīng)的GIIE指數(shù)。并利用NOAA二十世紀(jì)再分析資料V2、hadley中心月平均海溫資料,綜合應(yīng)用相關(guān)分析、合成分析、經(jīng)驗(yàn)正交函數(shù)分解(EOF)、奇異值分解(SVD)、T-N flux診斷等方法和數(shù)值模擬方法,系統(tǒng)地研究了前期到同期北大西洋海溫異常對(duì)廣義東亞夏季風(fēng)與印度夏季風(fēng)的交界面GIIE年際變化的影響機(jī)制。揭示了北大西洋三極型海溫異常通過激發(fā)北大西洋-絲路型遙相關(guān)影響GIIE年際變化的物理過程。并用ECHAM5-NEM02.3數(shù)值模式對(duì)分析結(jié)果進(jìn)行了分析和驗(yàn)證。主要結(jié)論如下：(1)廣義位溫的概括公式及廣義定義下的交界面。在前人廣義位溫定義的基礎(chǔ)上,用EOF提取各種大氣不均勻飽和狀況的權(quán)重,按照權(quán)重線性組合得到能綜合概括不同非均勻飽和狀態(tài)的廣義位溫的線性組合公式。用這個(gè)廣義位溫的線性組合公式重新計(jì)算了東亞夏季風(fēng)與印度夏季風(fēng)的交界面及其指數(shù),并將其稱為基于廣義位溫的東亞夏季風(fēng)與印度夏季風(fēng)交界面(GIIE)。由于廣義位溫的線性組合能更真實(shí)地描述大氣的“不完全飽和”狀態(tài),因此GIIE能更好地描述東亞夏季風(fēng)與印度夏季風(fēng)交界面的演變。(2)北大西洋影響GIIE年際變化主導(dǎo)模態(tài)的提取。通過對(duì)多年春季到夏季北大西洋海溫異常和GI IE多年位置分布做奇異值分解SVD后發(fā)現(xiàn),從前期春季到同期夏季北大西洋三極型海溫分布與GIIE年際變化存在顯著的關(guān)系。進(jìn)一步對(duì)北大西洋海溫異常做GIIE指數(shù)的合成分析確認(rèn),北大西洋三極型海溫異常是兩個(gè)場(chǎng)耦合關(guān)系的主導(dǎo)模態(tài)。(3)北大西洋三極型海溫影響GIIE年際變化的物理過程。通過對(duì)基于SVD1左場(chǎng)(海溫場(chǎng))時(shí)間序列和右場(chǎng)(GIIE)時(shí)間序列做高層經(jīng)向風(fēng)異常、位勢(shì)高度異常和波通量的合成分析,得到了北大西洋三極型海溫異常對(duì)GIIE的影響機(jī)制-北大西洋-絲路型遙相關(guān),揭示了前期到同期北大西洋三極型海溫影響GIIE位置的物理過程：前期北大西洋三極型“+、-、+”(“-、+、-”)海溫異常持續(xù)到夏季,并激發(fā)北大西洋-絲路型遙相關(guān),夏季北大西洋-絲路型沿大圓路徑傳播,相應(yīng)的位勢(shì)高度異常沿大圓路徑呈“負(fù)-正-負(fù)-正-負(fù)-正”(“正-負(fù)-正-負(fù)-正-負(fù)”)分布特征,環(huán)流場(chǎng)則沿大圓路徑呈“氣旋-反氣旋-氣旋-反氣旋-氣旋-反氣旋”(反氣旋-氣旋-反氣旋-氣旋-反氣旋-氣旋)分布特征,導(dǎo)致西太平洋副高異常偏強(qiáng)偏南(偏弱偏北),進(jìn)一步導(dǎo)致GIIE位置異常偏東(偏西)。(4)北大西洋海溫異常影響GIIE年際變化的數(shù)值模擬。所用的ECHAM5-NEM02.3模式能夠比較好地模擬出北大西洋三極型海溫的基本特征。分析耦合模式中異常風(fēng)場(chǎng)、位勢(shì)高度場(chǎng)和T-N通量對(duì)北大西洋三極型海溫的響應(yīng),結(jié)果表明數(shù)值模式比較好地再現(xiàn)了觀測(cè)事實(shí)分析中的北大西洋-絲路型遙相關(guān)及其導(dǎo)致的GI IE年際擺動(dòng),驗(yàn)證了北大西洋三極型通過北大西洋-絲路型影響西太平洋副高強(qiáng)度和位置進(jìn)而影響GIIE的物理模型,所獲結(jié)果也與第四章的分析結(jié)論一致。
[Abstract]:The East Asian summer monsoon and the India summer monsoon interface are one of the important indicators of the interaction between the two sub-systems of the Asian summer monsoon (the East Asian summer monsoon and the India summer monsoon). Its interannual variation is of great significance to understanding and predicting the Asian summer monsoon circulation and its precipitation. In this paper, based on previous studies, we improved the East Asian summer monsoon and India summer monsoon interface, and proposed the GIIE of the East Asian summer monsoon and India summer monsoon based on the generalized potential temperature, and obtained the corresponding GIIE index. And the use of NOAA in twentieth Century, Hadley V2 reanalysis data center SST data, correlation analysis, comprehensive application of synthetic analysis, empirical orthogonal function (EOF), singular value decomposition (SVD), T-N flux simulation method and numerical method of diagnosis, systematically study the influence mechanism of the North Atlantic SST anomalies over the same period the interface of GIIE generalized the interannual variations of East Asian summer monsoon and the summer monsoon in India. The physical process of the interannual variation of the North Atlantic tri - type sea temperature anomalies by stimulating the North Atlantic - silk teleconnection of the North Atlantic is revealed in the North Atlantic Ocean. The results of the analysis are analyzed and verified by the ECHAM5-NEM02.3 numerical model. The main conclusions are as follows: (1) the generalized formula of the generalized bit temperature and the interface under the generalized definition. Based on the definition of generalized potential temperature of predecessors, we extract the weight of all kinds of atmospheric non-uniform saturated conditions by EOF, and get a linear combination formula based on weight linear combination to generalize the generalized potential temperature of different non-uniform saturated states. Using the linear combination formula of the generalized potential temperature, we calculate the interface and index of the East Asian summer monsoon and the India summer monsoon, and call it the East Asian summer monsoon and India summer monsoon interface (GIIE) based on generalized potential temperature. Because the linear combination of generalized potential temperature can more accurately describe the "incomplete saturation" state of the atmosphere, GIIE can better describe the evolution of the East Asian summer monsoon and the India summer monsoon interface. (2) the extraction of the leading mode of the interannual variation of GIIE in the North Atlantic. Through the singular value decomposition SVD for many years from the spring to summer in the North Atlantic SST and GI IE, we find that there is a significant relationship between the three pole SST distribution in the North Atlantic and the GIIE interannual variation from the early spring to the same period. Further analysis of the North Atlantic sea temperature anomaly GIIE index has confirmed that the North Atlantic tri - polar sea temperature anomaly is the dominant mode of two field coupling relationships. (3) the physical process of the interannual variation of GIIE in the North Atlantic tri - polar sea temperature. Based on the SVD1 field (SST) based on the left and right field time series (GIIE) time series wind anomalies, geopotential height anomaly and the wave flux obtained by synthetic analysis of high-rise, the North Atlantic SST anomaly triode type impact mechanism of GIIE - the Silk Road North Atlantic teleconnection, reveals the influence of the physical process the location of GIIE over the same period prior to the North Atlantic SST: the North Atlantic triode triode type "+, -, +" ("+, -, -) SST anomalies continued to summer, and stimulate the North Atlantic teleconnection Silk Road, the spread of the Summer North Atlantic - Silk Road along the great circle path, the corresponding potential the height anomaly along the great circle path is" negative positive negative positive negative positive (positive negative positive negative positive negative ") distribution, circulation field along the great circle path is" - cyclonic anticyclonic cyclonic and anticyclonic cyclonic and anti cyclonic (anticyclonic - "cyclone anticyclone - - cyclone The distribution characteristics of anticyclone cyclones lead to the abnormal bias of the West Pacific subtropical high (the weaker North), which further leads to the anomalous eastward (West) position of the GIIE position. (4) the numerical simulation of the interannual variation of GIIE in the North Atlantic Ocean temperature anomaly. The ECHAM5-NEM02.3 model can be used to simulate the basic characteristics of the tri - polar SST in north the Atlantic. Response analysis of coupled model of abnormal wind, geopotential height and T-N flux of the North Atlantic SST triode type, the results show that the numerical model is well reproduced by the observation and analysis of facts in the North Atlantic - Silk Road and GI IE teleconnection to verify the interannual oscillation, the North Atlantic triode type effect of physical model GIIE then through the North Atlantic - silk road type influence the West Pacific subtropical high intensity and position, the results obtained with the fourth chapter analysis conclusion.
【學(xué)位授予單位】：云南大學(xué)
【學(xué)位級(jí)別】：博士
【學(xué)位授予年份】：2016
【分類號(hào)】：P425.42;P461.2

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