北太平洋海水表层铅直热通量收支的季节变化及与海温的联系

SEASONAL VARIATION OF SEA SURFACE HEAT FLUX BUDGET IN NORTH PACIFIC AND ITS RELATION TO SST

分析表明，北太平洋中纬度地区海水表层铅直热通量收支的分布特征与海流密切有关。暖流区的受热相对较小或失效相对较大，冷流区则反之。海水表层铅直热通量收支的季节变化分别具有一年、半年和四个月三种周期，并分别与太阳辐射、海流以及大气环流等相联系。海水表层错直热通量和海温的特征向量是基本相似的，其相应的时间系数也有基本相同的变化趋势。伴随着海水表层热通量的变化，海温也相应发生变化。海温变化的滞后时间，基本场为2个月，扰动场为1个月。

Analyses show the distribution of sea surface heat budget in mid-latitude in North Pacific is closely related to ocean currents. There is less heat gain(or more heat loss)near warmcurrent,conversely near cold current. The seasonal variation of sea surface heat flux budgetbears three different periods with one year, half year and four months, which is associatedwith solar radiation,ocean current and atmospheric general circulation, respectively. Basiclly',eigenvectors of sea surface heat flux budget and SST are analogous, their time coefficientshave same variation tendency. The corresponding variations of SST take place to follow thevariations of sea surface heat flux budget. The lag time of SST variation is 2 months for basicfield,and 1 month for perturbation field.