摘要:
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利用ERA-40 海表10 m风场驱动WAVEWATCH-Ⅲ(WW3)海浪模式,模拟得到南海-北印度洋1957 年9 月—2002 年8 月的海浪资料,采用线性回归、功率谱分析、MK检验等方法,分析了该海域有效波高(SWH)的线性趋势、变化周期、突变形势。结果表明:(1)近44 a 期间,吕宋岛东北部近海、吕宋海峡、南海大风区、斯里兰卡-苏门答腊岛、索马里以东的SWH有线性递增趋势;(2)索马里以东、斯里兰卡-苏门答腊岛、南海大风区、吕宋岛以东近海的SWH存在共同的3.3—5.2 a 显著性变化周期和26 a 以上的长周期震荡;(3)索马里以东的SWH存在显著的突变现象,突变期为1982 年;斯里兰卡-苏门答腊岛的SWH无显著的突变现象;南海大风区和吕宋岛以东近海的SWH均存在显著的突变现象,突变期分别为1971年和1969年。 |
In this study, the wave data from December 1957 to August 2002 was simulated by using WAVEWATCH-Ⅲ (WW3) wave model, with ERA-40 wind data as the driving field. The linear trend, periods and abrupt phenomenon of the SWH (Significant Wave Height) were presented and analyzed by using linear regression method, power spectrum and MK test. Results show that, (1) SWH in the northeast of Luzon Island, Luzon Strait, gale area in the south china sea, east of Somali and Sri Lanka-Sumatra Island waters from 1958 to 2001 presents a significant increasing trend. (2) There is a common periods of 3.3—5.2 years, and long term oscillation period of above 26 years in the east of Somali, Sri Lanka-Sumatra Island waters, gale area in the South China Sea, Luzon Strait and its east coastal. (3) The abrupt period of SWH is 1982 in east waters of Somali, and 1971 in gale area in the South China Sea, 1969 in Luzon Strait and its east coastal, but no obvious abrupt phenomenon in the Sri Lanka-Sumatra Island waters. |
参考文献:
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