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MJO與熱帶風(fēng)場(chǎng)、海溫日變化的關(guān)系

單位：1. 國(guó)家海洋局南通海洋環(huán)境監(jiān)測(cè)中心站, 江蘇南通 226002;
2. 南京信息工程大學(xué)大氣科學(xué)學(xué)院, 江蘇南京 210044;
3. 南京信息工程大學(xué)海洋科學(xué)學(xué)院, 江蘇南京 210044

關(guān)鍵詞：熱帶大氣季節(jié)內(nèi)振蕩位相經(jīng)向風(fēng)場(chǎng)日變化海溫日增暖太陽(yáng)輻射場(chǎng)

分類(lèi)號(hào)：P732

出版年·卷·期（頁(yè)碼）：2018·35·第一期（80-94）

摘要：

利用CCMP的風(fēng)場(chǎng)、NOAA地表日均太陽(yáng)輻射通量等資料，研究了MJO與風(fēng)場(chǎng)和海表溫度日變化的關(guān)系。結(jié)果表明： MJO不同位相時(shí)，風(fēng)場(chǎng)及海表溫度日變化有明顯不同。當(dāng)夏季MJO處于發(fā)展位相（位相1—4）時(shí)，赤道印度洋經(jīng)向風(fēng)場(chǎng)的日變化偏弱；而西太平洋經(jīng)向風(fēng)場(chǎng)的日變化偏強(qiáng)；當(dāng)MJO處于成熟位相（位相5—8）時(shí)，赤道印度洋和西太平洋的經(jīng)向風(fēng)場(chǎng)日變化與發(fā)展位相時(shí)相反。MJO對(duì)于海表溫度場(chǎng)日變化的調(diào)制，冬季比夏季表現(xiàn)得更加明顯。同時(shí)使用Dynamo的實(shí)測(cè)資料證明了在經(jīng)驗(yàn)公式中赤道地區(qū)驅(qū)動(dòng)海溫日增暖的主要因子是風(fēng)場(chǎng)的變化，輻射場(chǎng)對(duì)其影響遠(yuǎn)不如風(fēng)場(chǎng)的變化。

The relationship between MJO and wind diurnal cycle and sea surface temperature (SST) diurnal warming are analyzed by using CCMP wind field and NOAA surface solar flux. The results are as follows:Wind diurnal cycle and SST diurnal warming are significantly different when MJO in different phases. In summer, when MJO is in phases 1 to 4, the equatorial Indian ocean has strong precipitation and weak solar radiation, meridional wind (v) diurnal cycle becomes weak. V diurnal cycle in the Indian ocean becomes strong when MJO in phases 5-8. The meridional diurnal cycle in the western Pacific has an opposite performance with that in the Indian ocean. The effect of MJO on SST diurnal warming is stronger in winter than that in summer. The Dynamo observation data proves that the main factor causing sst diurnal warming in an empirical formula in the equatorial region is the changes of wind. The effect of radiation is far less than that of wind.

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