本文關(guān)鍵詞： 聲散射層 垂直遷移 日變化 LADCP 船載ADCP 南海　出處：《海洋科學(xué)進(jìn)展》2016年02期 　論文類型：期刊論文

【摘要】：依據(jù)2012年ROSE航次船載ADCP和LADCP的觀測數(shù)據(jù),對南海秋季聲散射層的垂向分布特征和日變化進(jìn)行了分析;根據(jù)估算出的散射層中散射體的垂向遷移速度,對散射體類型進(jìn)行了分析。觀測結(jié)果表明,南海存在著2個聲散射層,一個聲散射層位于0~200m,散射強(qiáng)度具有顯著的日變化特征,即白天弱,夜晚強(qiáng);另一聲散射層則處于300~500m的深度,其散射強(qiáng)度的日變化與另一個相反,白天較強(qiáng),夜晚變?nèi)�。通過計算可得,散射體的垂向遷移,在傍晚時分運動方向向上,速度約為1.74cm/s;而凌晨左右運動方向向下,速度約為1.39cm/s。觀測結(jié)果還表明,ADCP和LADCP的觀測結(jié)果能夠互相補(bǔ)充,更有利于對聲散射層的細(xì)致研究。
[Abstract]:Based on the observations of ADCP and LADCP carried by ROSE on 2012, the vertical distribution and diurnal variation of the acoustic scattering layer in the South China Sea in autumn are analyzed, and the vertical migration velocity of the scatterer in the scattering layer is estimated. The observation results show that there are two acoustic scattering layers in the South China Sea, one of which is located at 0 ~ 200 m, and the scattering intensity is characterized by obvious diurnal variation, that is, weak day and strong night. The other sound scattering layer is at a depth of 300 ~ 500m, and the diurnal variation of scattering intensity is opposite to that of the other, which is stronger during the day and weaker at night. The vertical migration of the scatterer can be obtained by calculation, and the direction of the scattering is upward in the evening. The velocity is about 1.74 cm / s, while the velocity is about 1.39 cm / s in the early morning. The results also show that the observations of ADCP and LADCP can complement each other, which is more beneficial to the detailed study of acoustic scattering layer.
【作者單位】： 國家海洋局第一海洋研究所;海洋環(huán)境科學(xué)和數(shù)值模擬國家海洋局重點實驗室;
【基金】：國家自然科學(xué)基金委員會-山東省人民政府聯(lián)合資助海洋科學(xué)研究中心項目——海洋環(huán)境動力學(xué)和數(shù)值模擬(U1406404)
【分類號】：P716
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本文編號：1555951