南海海面风

发布时间：2018-12-18 02:44

【摘要】：利用2002—2011年南海海面风场、高度场和温度场的月平均资料分析了这些要素的变化趋势及年际变化特征。计算得到区域平均海面风东分量的线性趋势为(-0.012±0.014)(m·s~(-1))·a~(-1),北分量的线性趋势为(-0.014±0.019)(m·s~(-1))·a~(-1),其年际变化与NINO3指数相关系数可达0.63,滞后1个月;区域平均海面风应力旋度的线性趋势为(0.099±0.330)×10~(-9)(N·m~(-3))·a~(-1),其年际变化与中太平洋厄尔尼诺(EMI)指数呈高度相关,达到-0.85,滞后3个月;区域平均海面高度的线性趋势为(0.665±0.200)cm·a~(-1),其年际变化与EMI指数相关系数可达-0.80,滞后2个月;区域平均海表温度的线性趋势为(-0.016±0.017)℃·a~(-1),其年际变化与NINO3指数相关系数可达0.68,滞后4个月。其中海表温度的负趋势与近期全球变暖的停滞相一致。采用经验正交函数分解方法分析了各要素的年际变化特征,结果显示海面风场的第一模态呈现海盆尺度的反气旋格局,其对应的时间序列与NINO3.4指数相关系数最大可达0.68,滞后5个月。海面高度场的第一模态沿南海东边界和越南东部出现较高值,其对应的时间序列的变化滞后于EMI指数3个月,呈负相关,但系数最大为-0.32。海面温度场的第一模态呈西高东低的分布状态,其对应的时间序列与NINO3指数的相关系数最大可达0.62,滞后4个月。
[Abstract]:Based on the monthly mean data of the sea surface wind field, height field and temperature field in the South China Sea from 2002 to 2011, the variation trend and interannual variation characteristics of these elements are analyzed. The linear trend of the east component of the mean sea surface wind is (-0.012 卤0.014) (m s ~ (-1) a ~ (-1), and the linear trend of the northern component is (-0.014 卤0.019) (m s ~ (-1) a ~ (-1). The correlation coefficient between interannual variation and NINO3 index can reach 0.63, which lags by one month. The linear trend of the mean sea surface wind stress curl is (0.099 卤0.330) 脳 10 ~ (-9) (N ~ (-3) a ~ (-1), and the interannual variation is highly correlated with the El Nino (EMI) index in the central Pacific Ocean, reaching -0.85, and the linear trend of mean sea surface wind stress is (0.099 卤0.330) 脳 10 ~ (-9) (N ~ (-3) a ~ (-1). Delay 3 months; The linear trend of the mean sea surface height is (0.665 卤0.200) cm a ~ (-1). The correlation coefficient between the interannual variation and the EMI index is -0.80, with a delay of 2 months. The linear trend of mean sea surface temperature is (-0.016 卤0.017) 鈩，

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