【摘要】：通過(guò)分析深海潛標(biāo)系統(tǒng)的實(shí)際觀測(cè)海流數(shù)據(jù)對(duì)2013年赤道印度洋上層Wyrtki急流(WJ)的變異進(jìn)行了研究,發(fā)現(xiàn)WJ在2013年呈現(xiàn)明顯異常變化,主要表現(xiàn)為春季W(wǎng)J強(qiáng)度略強(qiáng)于同年秋季W(wǎng)J。再分析資料的分析結(jié)果也同樣驗(yàn)證此結(jié)論,而這與氣候態(tài)WJ的演化特征相反。在氣候平均態(tài)下,印度洋春季W(wǎng)J強(qiáng)度遠(yuǎn)弱于秋季W(wǎng)J強(qiáng)度。進(jìn)一步數(shù)據(jù)分析與數(shù)值模式結(jié)果表明,2013年春季W(wǎng)J異常加強(qiáng)與赤道印度洋海表風(fēng)場(chǎng)變化密切相關(guān),而春季海表風(fēng)場(chǎng)的變化主要?dú)w因于2013年春季異常增強(qiáng)的季節(jié)內(nèi)振蕩(ISO)事件,發(fā)生在2013-05的ISO對(duì)流位相是導(dǎo)致春季印度洋海表西風(fēng)異常的直接原因。本研究揭示了中小時(shí)間尺度海氣相互作用可以影響更長(zhǎng)時(shí)間尺度海洋環(huán)流系統(tǒng)的年際變化。
[Abstract]:The variation of Wyrtki jet (WJ) in the upper layer of the equatorial Indian Ocean in 2013 is studied by analyzing the observed current data of the deep-sea submarkage system. It is found that the variation of WJ in 2013 is obviously abnormal, which mainly shows that the intensity of WJ in spring is slightly stronger than that in autumn of the same year. The results of reanalysis also confirm this conclusion, which is contrary to the evolution of climatic WJ. The WJ intensity in the Indian Ocean in spring is much weaker than that in autumn in the mean climatic state. The results of further data analysis and numerical model show that the enhancement of WJ anomaly in spring 2013 is closely related to the variation of the sea surface wind field in the equatorial Indian Ocean, and the variation of the surface wind field in spring is mainly attributed to the intraseasonal oscillation (ISO) event, which is enhanced in the spring of 2013. The ISO convective phase occurred in 2013-05 is the direct cause of the Indian Ocean surface westerly anomaly in spring. In this study, it is revealed that the interaction between sea and air at medium and small time scales can influence the interannual variation of ocean circulation system in longer time scale.
【作者單位】： 國(guó)家海洋局第一海洋研究所海洋與氣候研究中心;青島海洋科學(xué)與技術(shù)國(guó)家實(shí)驗(yàn)室區(qū)域海洋動(dòng)力學(xué)與數(shù)值模擬功能實(shí)驗(yàn)室;國(guó)家海洋局第一海洋研究所海洋環(huán)境數(shù)值模擬實(shí)驗(yàn)室;
【基金】：全球變化研究國(guó)家重大科學(xué)研究計(jì)劃項(xiàng)目——太平洋印度洋對(duì)全球變暖的響應(yīng)及其對(duì)氣候變化的調(diào)控作用(2012CB955601) 國(guó)家自然科學(xué)基金項(xiàng)目——全球變暖背景下印度洋年際時(shí)間尺度海氣相互作用對(duì)季節(jié)內(nèi)振蕩的影響(41376037) 國(guó)家自然科學(xué)基金委員會(huì)項(xiàng)目-山東省人民政府聯(lián)合資助海洋科學(xué)研究中心項(xiàng)目——海洋環(huán)境動(dòng)力學(xué)和數(shù)值模擬(U1606405) 全球變化與海氣相互作用專項(xiàng)項(xiàng)目——季風(fēng)變化對(duì)印度洋東部和南海南部上升流生態(tài)系統(tǒng)的影響(GASI-03-01-03-03);熱帶印度洋海洋過(guò)程與海氣相互作用(GASIIPOVAI-02);太平洋-印度洋與亞洲季風(fēng)的相互影響(GASI-IPOVAI-03);東印度洋南部水體綜合調(diào)查春、秋航次(GASI-02-IND-STSspr,GASI-02-IND-STSaut)
【分類號(hào)】：P731.2;P732
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本文編號(hào)：2169293