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应用灰色系统理论,对太平洋海域48个长期验潮站的月均海平面分别建立了GM(1,1)模型。GM(1,1)模型能较好地反映太平洋海域的海平面变化的趋势,它除了能给出连续的海平面变化速率外,同时能方便地给出海平面变化的加速率。模拟结果表明,在太平洋地壳均衡假设下,太平洋海域的月均海平面以平均速率0.17cm/a上升。在太平洋海域所取的48个长期验潮站中,有40个站在加速上升,全部站的平均加速度为0.00029cm/a2。且加速率逐渐增大。当然这些加速率都很小,但作为一种普遍性的趋势,这已足以说明:太平洋海域的海平面在加速上升
Applying the gray system theory, the GM (1,1) model is established respectively for the monthly mean sea levels of 48 long-term tide gauge stations in the Pacific Ocean. The GM (1,1) model can better reflect the trend of sea level change in the Pacific Ocean. In addition to giving a continuous sea level change rate, the GM (1,1) model can also give the acceleration of sea level change conveniently. The simulation results show that the average monthly sea level in the Pacific Ocean increases at an average rate of 0.17 cm / a under the assumption of Pacific crustal equilibria. Of the 48 long-term tide gauges taken in the Pacific Ocean, 40 stations accelerated at an acceleration of 0.00029 cm / a2 at all stations. And the acceleration rate gradually increased. Of course, these rates of acceleration are small, but as a general trend it is enough to show that the sea level in the Pacific Ocean is accelerating