西太平洋海温和北极海冰异常对大气环流的影响  

Response of the General Circulation to Western Pacific Sea Surface Temperature Anomalies and North Pole Sea Ice Area Anomalies in Summer

作　　者：纪玲玲[1] 汤明敏[2] 

机构地区：[1]解放军理工大学气象学院大气科学系,南京211101 [2]南京大学大气科学系,南京210008

出　　处：《解放军理工大学学报（自然科学版）》2000年第2期75-82,共8页Journal of PLA University of Science and Technology(Natural Science Edition)

摘　　要：利用九层菱形截断 1 5波的全球大气环流谱模式 ,对赤道西太平洋海表温度、北极海冰及综合异常情形在北半球夏季大气环流中的作用进行了一系列数值试验和分析。结果表明 :赤道西太平洋海表温度的异常变化与北极海冰面积变异均可显著影响大气环流 ,但海冰异常对低纬大气环流的影响远小于西太平洋的海温异常的影响。对全球大气环流异常形成机制的讨论表明二维 Rossby波列的传播及外强迫引起的大气内部动力学过程是夏季大气环流异常产生的主要原因。By using a nine layer global spectral GCM which is rhomboidally truncated at wave number 15, a series of numerical experiments are conducted to study the effects of tropic West Pacific SSTA and the North Pole sea ice anomalies on the general circulation round the globe.Results show that the North Pole sea ice anomalies and SSTA of tropic West Pacific have very clear forcing effects on the global general circulation anomalies.The effect of sea ice anomalies on the general circulation of low latitude is much lesser than that of west tropical SSTA.The discussion on the formation mechanism of the global general circulation anomalies reveals that it is the propagation of two dimensional Rossby wave train and the internal atmospheric dynamic process due to external forcing that mainly cause the summer general circulation anomalies.

关 键 词：西太平洋 海温异常 大气环流 数值试验 

分 类 号：P732[天文地球—海洋科学]