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Study on influence of oceanic wave for momentum exchange process between ocean and atmosphere

海浪对海洋与大气动量交换过程的影响研究

基本信息

批准号：
22540452
负责人：
KUTSUWADA Kunio
金额：
$ 2.66万
依托单位：
Tokai University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
2010
资助国家：
日本
起止时间：
2010 至 2012
项目状态：
已结题

项目摘要

This study aims to examine effects of oceanic waves on momentum exchange between ocean and atmosphere based on measurements of wind-wave and swell using drifting buoys. The experimental cruise planned in March 2011 was suspended due to the Great East Japan Earthquake. In alternate cruises by R/V Bosei-Maru (Tokai Univ.) in spring 2011 and 2012, we have performed simultaneous measurements of oceanic waves with turbulent energies in both the oceanic and atmospheric surface layers. In these cruises, we had spectral energies which are distinguishable betweenwind waves and swells under different atmospheric and oceanic conditions on open ocean. In addition to these data under restricted conditions depending on weather , we have also measured oceanic waves under various conditions at the Shirahama observation tower in the Disaster Prevention Research Institute of Kyoto University . These measurements permitted us to classify into two cases in which the cross swelland pure wind-wave cases are measured, and gave a new insight about effects of swells on frictional coefficient by wind on sea surface. Further, we could verify the consistency with the current wave model about high-order information such as significant wave height. We have also constructed surface flux products persistently by satellite data, and made direct measurements of solar and long-wave radiations on ship board. We have found that surface winds by satellite microwave radiometer have systematic errors under the conditions with specific wave and wind directions, meaning a possibility that the additional wave information make the reliability of surface wind data higher.

本研究旨在利用漂流浮标测量海浪和涌浪，探讨海浪对海洋与大气动量交换的影响。原计划于2011年3月进行的实验性巡航由于东日本大地震而暂停。在2011年春季和2012年春季由东海大学的R/V Bosei-Maru交替巡航中，我们在海洋和大气表层同时测量了具有湍流能量的海浪。在这些巡航中，我们获得了在不同大气和海洋条件下在开阔海洋上区分风浪和涌浪的光谱能量。除了这些受天气限制条件下的数据外，我们还在京都大学防灾研究所的白滨观测塔测量了各种条件下的海浪。这些测量结果使我们能够将横浪和纯风浪两种情况进行分类，并对风浪对海面风摩擦系数的影响有了新的认识。进一步验证了有效波高等高阶信息与当前波浪模型的一致性。我们还利用卫星数据持续构建了地表通量产品，并在船上进行了太阳辐射和长波辐射的直接测量。我们发现卫星微波辐射计测得的地面风在特定的波浪和风向条件下存在系统误差，这意味着附加的波浪信息有可能提高地面风资料的可靠性。