海水温度对海浪成长的影响及其机制分析  

Effect of sea surface temperature on wave growth and its mechanism analysis

作　　者：高金鹏[1,2] 赵栋梁[1,2] 

机构地区：[1]中国海洋大学物理海洋教育部重点实验室,山东青岛266100 [2]中国海洋大学海洋与大气学院,山东青岛266100

出　　处：《中国科技论文》2016年第21期2498-2501,2518,共5页China Sciencepaper

基　　金：国家自然科学基金资助项目(41276015);高等学校博士学科点专项科研基金资助项目(20120132110004)

摘　　要：利用浮标、卫星高度计和再分析这3种数据分析了海水温度和海浪波高之间的关系。发现同一纬度海域的低温波高大于高温波高,且两者的差异随风速的增大而减小。对不同纬度处波高进行距平处理,得到的距平波高与海温呈现显著的负相关性,并且这种负相关性对风浪、涌浪及混合浪没有明显差异。为解释此现象,给出了1种可能的物理机制,即海温增大伴随分子黏性减小,间接引起湍流耗散增强,从而加大波动能量耗散使波高降低。The relationship between sea surface temperature （SST） and ocean waves was explored by buoys, satelhte altimeter and reanalysis data. The results indicate that significant wave height （SWH） under low SST is greater than that under high SST at the same latitude, and the difference decreases with the increase of wind speed. SWH shows significant negative correlation with SST after eliminating the influence of SWH varies with latitude distribution. The conclusion is true for wind waves, swell and combined waves. One possible physical mechanism for this phenomenon Is that the decrease of water viscosity with increasing temperature can cause the enhancement of turbulence effect indirectly. As a result, SWH is reduced partly since the wave turbu- lent dissipation is strengthened.

关 键 词：物理海洋学 波高 海水温度 分子黏性 湍流耗散 

分 类 号：P731[天文地球—海洋科学]