利用TOPEX/Poseidon高度计资料提取的太平洋M2内潮能通量分布

基于内波动力学方程,提出利用TOPEX/Poseidon高度计资料提取内潮的方法.利用该方法,结合1992年10月到2002年6月共10a的TOPEX/Poseidon高度计资料和Levitus(1998)资料,给出了整个太平洋M₂内潮能通量的分布,并与观测资料进行比测,两者符合较好.同时也发现沿整个太平洋边界M₂内潮能通量向大洋内部输入的总功率为58.4GW,其中北太平洋对此贡献为30.2GW,南太平洋为28.2GW,可见南、北太平洋的贡献是基本相等的.东太平洋的总量为17.8GW,而西太平洋为40.6GW,两者差异较大(以160°W作为东、西太平洋分界线).

Estimates of M2 internal tide energy fluxes in the Pacific Ocean using TOPEX/Poseidon altimeter data

TOPEX/Po seidon altimeter data from October 1992 to June 2002 and Levitus(1998) are used to calculate the energy flux of M₂ internal tides in the Pacific Ocean,basing on inter naltides dynamical equation.M₂ internal tides,that yield energy transmission,are extracted from temporarily coherent internal tide signals in the altimeter data.The method is testified by the field measurements of ADCP current velocities in the South China Sea.The results show that satellite-derived M₂ tide components agree with the field data very well.Computation results indicate that the total energy flux of M₂ internal tides along the margin of Pacific Ocean is about 58.4 GW,in which 30.2 GW is from the North Pacific and 28.2 GW is from the South Pacific.However,the total energy flux of M₂ internal tides from the margin of East Pacific is 17.8 GW and 40.6 GW from the margin of the West Pacific.(160°W is taken as the boundary of the East Pacific Ocean and West Pacific Ocean)