赤道东太平洋海温的季节波动

THE SEASONAL FLUCTUATION OF THE SST OF THE EQUATORIAL EASTERN PACIFIC OCEAN

本文以海温月波动值为指标，从经向时－空变化、纬向时－空变化以及水平分布等方面，论述了赤道东太平洋（0°－10°S、180°－90°W）海温波动的基本特征。这一海域，特别是150°W以东，海温季节变化明显，冬半年增温，夏半年降温。自10°S向北，逐渐过渡到10°N，则转为冬半年降温、夏半年增温。海温波动的水平分布表明，1月为增温期，7月为降温期，4月和10月是过渡季节。最大月增温值为1．8℃，出现于1月和2月，最大月降温值为—1．7℃，出现于7月。增温期，海温逐月升高，累计增温峰值可达6．2℃。文中指出，赤道东太平洋海温的波动与热带辐合带（ITCZ）的活动有关。

In this paper, by using monthly fluctuational value of the Sea-surface temperature (SST), has been discussed fundamental characteristic of the SST of the equatorial Eastern Pacific Ocean, from the longitudinal spatial-temporal distribution, the latitudinal spatial-temporal distribution and the hori zonal distribution. The paper point out that the fluctuation of the SST of the equatorial Eastern Pacific Ocean is related to the seasonal displacement of the Intertropical Convergence zone (ITCZ).