【摘要】：利用2002—2011年南海海面風(fēng)場(chǎng)、高度場(chǎng)和溫度場(chǎng)的月平均資料分析了這些要素的變化趨勢(shì)及年際變化特征。計(jì)算得到區(qū)域平均海面風(fēng)東分量的線性趨勢(shì)為(-0.012±0.014)(m·s~(-1))·a~(-1),北分量的線性趨勢(shì)為(-0.014±0.019)(m·s~(-1))·a~(-1),其年際變化與NINO3指數(shù)相關(guān)系數(shù)可達(dá)0.63,滯后1個(gè)月;區(qū)域平均海面風(fēng)應(yīng)力旋度的線性趨勢(shì)為(0.099±0.330)×10~(-9)(N·m~(-3))·a~(-1),其年際變化與中太平洋厄爾尼諾(EMI)指數(shù)呈高度相關(guān),達(dá)到-0.85,滯后3個(gè)月;區(qū)域平均海面高度的線性趨勢(shì)為(0.665±0.200)cm·a~(-1),其年際變化與EMI指數(shù)相關(guān)系數(shù)可達(dá)-0.80,滯后2個(gè)月;區(qū)域平均海表溫度的線性趨勢(shì)為(-0.016±0.017)℃·a~(-1),其年際變化與NINO3指數(shù)相關(guān)系數(shù)可達(dá)0.68,滯后4個(gè)月。其中海表溫度的負(fù)趨勢(shì)與近期全球變暖的停滯相一致。采用經(jīng)驗(yàn)正交函數(shù)分解方法分析了各要素的年際變化特征,結(jié)果顯示海面風(fēng)場(chǎng)的第一模態(tài)呈現(xiàn)海盆尺度的反氣旋格局,其對(duì)應(yīng)的時(shí)間序列與NINO3.4指數(shù)相關(guān)系數(shù)最大可達(dá)0.68,滯后5個(gè)月。海面高度場(chǎng)的第一模態(tài)沿南海東邊界和越南東部出現(xiàn)較高值,其對(duì)應(yīng)的時(shí)間序列的變化滯后于EMI指數(shù)3個(gè)月,呈負(fù)相關(guān),但系數(shù)最大為-0.32。海面溫度場(chǎng)的第一模態(tài)呈西高東低的分布狀態(tài),其對(duì)應(yīng)的時(shí)間序列與NINO3指數(shù)的相關(guān)系數(shù)最大可達(dá)0.62,滯后4個(gè)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 鹵0.014) (m s ~ (-1) a ~ (-1), and the linear trend of the northern component is (-0.014 鹵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 鹵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 鹵0.330) 脳 10 ~ (-9) (N ~ (-3) a ~ (-1). Delay 3 months; The linear trend of the mean sea surface height is (0.665 鹵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 鹵0.017) 鈩，

本文編號(hào)：2385190