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.

本研究旨在基于使用漂流浮标测量风浪和涌浪来研究海浪对海洋和大气之间动量交换的影响。由于东日本大地震，计划于2011年3月进行的实验性巡航被暂停。在 2011 年和 2012 年春季 R/V Bosei-Maru（东海大学）的交替巡航中，我们对海洋和大气表层中具有湍流能量的海浪进行了同步测量。在这些航行中，我们获得了可以区分公海不同大气和海洋条件下的风浪和海浪的光谱能量。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。这些测量使我们能够将测量的交叉涌浪和纯风浪情况分为两种情况，并对涌浪对海面风摩擦系数的影响给出了新的见解。此外，我们还可以验证有效波高等高阶信息与当前波浪模型的一致性。我们还坚持利用卫星数据构建地表通量产品，并在船上直接测量太阳和长波辐射。我们发现卫星微波辐射计测得的地面风在特定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使地面风数据的可靠性更高。