本文選題：深層經(jīng)向翻轉(zhuǎn)環(huán)流 + Ekman部分　； 參考：《熱帶海洋學(xué)報(bào)》2016年04期

【摘要】：基于六套模式產(chǎn)品,研究了時(shí)間平均狀態(tài)下印度洋深層經(jīng)向翻轉(zhuǎn)環(huán)流的動(dòng)力特征。時(shí)間平均狀態(tài)下,印度洋深層經(jīng)向翻轉(zhuǎn)環(huán)流(meridional overturning circulation,MOC)在各套數(shù)據(jù)中呈現(xiàn)一致的結(jié)構(gòu),即底層和深層水體向北進(jìn)入印度洋,中上層往南流出印度洋的逆時(shí)針?lè)D(zhuǎn)結(jié)構(gòu)。通過(guò)對(duì)經(jīng)向翻轉(zhuǎn)環(huán)流的動(dòng)力分解,文章分析了其各動(dòng)力部分在各套數(shù)據(jù)中的異同。在各套數(shù)據(jù)中,在南印度洋Ekman部分呈現(xiàn)一致的逆時(shí)針?lè)D(zhuǎn)結(jié)構(gòu),在10°S強(qiáng)度最大;地轉(zhuǎn)和外模部分在10°S以南分別呈現(xiàn)相似的順時(shí)針和逆時(shí)針的翻轉(zhuǎn)結(jié)構(gòu),在27°S強(qiáng)度最大且符號(hào)相反;相對(duì)而言,Ekman部分在20°S及赤道之間,對(duì)MOC的影響更明顯,而地轉(zhuǎn)及外模部分則在25°S以南的區(qū)域更明顯�；诓煌膭�(dòng)力熱力強(qiáng)迫,各套數(shù)據(jù)中各動(dòng)力部分流函數(shù)的空間范圍及強(qiáng)度存在顯著差異:由于各套數(shù)據(jù)的風(fēng)場(chǎng)相差不大,因此Ekman部分的整體結(jié)構(gòu)相似,強(qiáng)度差異較小;對(duì)于地轉(zhuǎn)部分,各數(shù)據(jù)表現(xiàn)出的順時(shí)針?lè)D(zhuǎn)結(jié)構(gòu)強(qiáng)度的差異主要受內(nèi)區(qū)斜壓流場(chǎng)強(qiáng)弱和西邊界流結(jié)構(gòu)的影響,內(nèi)區(qū)斜壓流場(chǎng)越強(qiáng),翻轉(zhuǎn)結(jié)構(gòu)越強(qiáng);西邊界流流幅越寬,對(duì)內(nèi)區(qū)斜壓流場(chǎng)影響越大,對(duì)翻轉(zhuǎn)結(jié)構(gòu)強(qiáng)度的削弱越大;外模部分翻轉(zhuǎn)結(jié)構(gòu)的強(qiáng)度受西邊界流強(qiáng)度的影響:西邊界流強(qiáng)度越大,外模部分翻轉(zhuǎn)結(jié)構(gòu)強(qiáng)度越大。
[Abstract]:Based on six sets of model products, the dynamic characteristics of the deep meridional reversal circulation in the Indian Ocean under the time average state are studied. Under the time-averaged condition, the meridional overturning circulation of the deep meridional overturning circulation of the Indian Ocean shows a consistent structure in various sets of data, i.e. the reverse clockwise turnover structure of the bottom and deep water bodies entering the Indian Ocean northward and the upper meridional overturning circulation flowing out of the Indian Ocean to the south. Through the dynamic decomposition of the meridional reversal circulation, this paper analyzes the similarities and differences of each dynamic part in each set of data. In each set of data, the Ekman part of the southern Indian Ocean showed a consistent counterclockwise inversion structure with the maximum intensity at 10 擄S, and the geostrophic and outer mode parts showed similar clockwise and counterclockwise flipping structures south of 10 擄S, respectively. The maximum intensity of 27 擄S and the opposite sign, the Ekman part is between 20 擄S and the equator, the effect on MOC is more obvious, and the geostrophic and outer mode part is more obvious in the area south of 25 擄S. Based on the different dynamic thermal forcing, there are significant differences in the spatial range and strength of the flow function of each set of data: because the wind field of each set of data is not different, the Ekman part is similar in structure and small in strength; For geostrophic part, the intensity difference of clockwise inverted structure in each data is mainly affected by the intensity of baroclinic flow field in inner region and the structure of western boundary flow. The stronger the baroclinic flow field in the inner region is, the stronger the turnover structure is, and the wider the flow amplitude of west boundary flow is. The greater the influence on the baroclinic flow field in the inner region, the greater the intensity of the overturned structure, and the greater the intensity of the western boundary flow is, the greater the strength of the outer mode part of the flipping structure is, and the more the strength of the outer mode part of the inverted structure is, the greater the intensity of the western boundary flow is.
【作者單位】： 熱帶海洋環(huán)境國(guó)家重點(diǎn)實(shí)驗(yàn)室(中國(guó)科學(xué)院南海海洋研究所);中國(guó)科學(xué)院大學(xué);中國(guó)科學(xué)院大氣物理研究所大氣科學(xué)和地球流體力學(xué)數(shù)值模擬國(guó)家重點(diǎn)實(shí)驗(yàn)室;
【基金】：中國(guó)科學(xué)院戰(zhàn)略性先導(dǎo)科技專(zhuān)項(xiàng)(A類(lèi))(XDA11010301) 國(guó)家自然科學(xué)基金(41376024) 國(guó)家重點(diǎn)基礎(chǔ)研究發(fā)展計(jì)劃(2013CB956204)~~
【分類(lèi)號(hào)】：P731.27

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