【摘要】 应用1979.1-2006.12北太平洋海表温度(SST)资料,采用一元线性回归、功率谱等统计方法对该区SST的变化特征进行分析,结果表明:(1)北太平洋SST年际变化较为显著,尤其在靠近亚洲大陆一带洋面、北太平洋中部中纬度海域及赤道中、东太平洋;(2)北太平洋西部和中部SST1-12月均呈上升趋势,靠近亚洲大陆的日本海一带和我国大陆以东洋面升温最快。除我国以东洋面升温中心在冬季外,其余海域升温均在夏秋季更迅速,20世纪90年代初以来尤为明显;北美海岸山脉以西及赤道中、东太平洋SST则呈弱的下降趋势;(3)赤道中、东太平洋春夏季存在显著5a和3.5a左右的年际变化;北太平洋中部30°N一带冬春季存在5-6a左右的年际变化和约14a的年代际变化;(4)除北太平洋中部(西风漂流区)外,各个海域大部分月份SST高值年和低值年分别与厄尔尼诺年和拉尼娜年对应,西风漂流区SST高值年均出现在20世纪末21世纪初,低值年与厄尔尼诺年对应。更多还原

【Abstract】 Based on the sea surface temperature(SST) in the North Pacific Ocean from 1979.1 to 2006.12 a detailed analysis is made by means of the statistic methods such as unitary linearity regression method and power spectrum.The results show that 1) There are seven regions over that SST changes remarkably: near Japanese sea,east of the Chinese mainland,the middle of Pacific Ocean near 30oN,the middle of Pacific Ocean near 45oN,west of Coast Range in North America,west of Mexico and the Middle and East Equatorial Pacific.2) SST over the west and middle of Pacific Ocean is increasing,most quickly over Japanese sea and east of the Chinese mainland.Except for the center of SST the increase in winter is over east of the Chinese mainland;the others are all in summer and autumn,especially since the early 1990s.The SST over west of Coast Range and the Middle and East Equatorial Pacific decrease,but more slowly.3) The Middle and East Equatorial Pacific possesses the variation periods of 5a and 3.5a while there is about 5-6a and 14a periodicity over the middle of Pacific Ocean near 30oN.4) Years of both maximum and minimum SST are consistent with that of El Nino and La Nino in most regions except the mid-latitude Pacific where the maximum appears in the late 1990s and early 2000s and minimum appears in years of El Nino.更多还原