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对COADS资料中1950～1992年西北太平洋(50°N—10°S,90°E—170°W)4°×4°方区的海表面气温、水温、气压和风速序列数据,采用考虑非线性效应的混合谱等方法,进行了时间序列分析;通过周期成分加线性趋势项拟合这些序列,求得表示各方区各要素升降趋势的年变率.年变率分析结果表明,上述西北太平洋海表气温在上升,整个海区平均年上升率为0.00170℃;水温在下降,整个海区平均年下降率为0.00105℃.水温下降区的范围比气温下降区的范围大,因而总体呈下降趋势.海表气温和水温的变化趋势在各海区的分布并非一致.其分布的突出特征是两者在赤道太平洋都有1a上升率高值区;而在中国东海北部以北、日本海和日本以东的西北太平洋广大海区,都有1a下降率的低值区;两者形成南升北降的相反趋势的对峙分布.上述整个西北太平洋海面气压的变化平均呈上升趋势,平均年上升率为0.00840hPa.气压的升降在该区并非一致,其中国海域及赤道太平洋海面气压呈上升趋势,而在140°E以东,20°N以北区域海面气压为下降趋势.太平洋海面风速呈加强趋势.风速东分量和北分量变化趋势的区域分布变化较大.
Based on the COADS data, the sequence of sea surface temperature, water temperature, pressure and wind speed in the 4 ° × 4 ° area of the Northwest Pacific (50 ° N-10 ° S, 90 ° E-170 ° W) The time series analysis is made by means of the mixed spectrum such as the linear effect, the annual variation of the rising and falling trend of each element of each square area is obtained by fitting the periodic elements with the linear trend elements, and the annual variation analysis shows that the northwest Pacific sea surface temperature is rising, the average annual rate of rise of the entire sea area is 0.00170 ℃; water temperature is declining, the average annual rate of decline of the entire sea area 0.00105 ℃ .Water temperature drop zone range than the temperature drop zone range, so the overall downward trend. The trend of sea surface air temperature and water temperature is not consistent in each sea area, and the salient feature of its distribution is that both have a high rate of increase of 1a in the equatorial Pacific Ocean. However, in the north of the East China Sea, the Sea of Japan and the east of Japan Of the western North Pacific Ocean, there is a low rate of decline in the la area; the two form the opposite trend of the south-north-up trend of the confrontation distribution.The above-mentioned Northwest Pacific sea surface pressure on the average upward trend, the average annual increase Is 0.00840hPa. The pressure rise and fall is not consistent in this region, with the sea surface pressure rising in both the China sea area and the equatorial Pacific, while the sea surface pressure in the area east of 140 ° E and north of 20 ° N is decreasing. The regional distribution of the trend of the East and North parts of the wind speed varies a lot.