索马里流系区域海温的年际变化Interannual Variations of the Sea Temperature Over the Region of the Somalia Current System
赵芳,胡瑞金
摘要(Abstract):
利用SODA资料对索马里流系区域海表温度(SST)的年际变化及其影响原因进行了研究。结果表明,春、秋季和冬季的索马里流系区SST呈现全区一致型的变化,但是夏季除了有全区一致型的变化外,还存在南北反位相的变化。夏季海温的这2种变化类型与ENSO、印度洋偶极子及印度季风存在密切关系。通过合成分析发现,在夏季全区一致型时,6月份热带西南印度洋、索马里沿岸的风应力旋度和大小与阿拉伯海均呈现相反的变化特点,夏季索马里流系区域海温变化主要受上升流和蒸发共同影响;在南北反位相型时,5月份的风应力变化信号最明显,且显著区域的位置和大小与全区一致型时的6月份不完全对应;夏季索马里流系南区SST异常可以利用上升流和蒸发异常进行解释,但北区的SST异常并非如此,其它因素应该起主导作用。
关键词(KeyWords): 海表温度(SST);索马里流系;年际变化;SODA;合成分析
基金项目(Foundation): 国家自然科学基金项目(41076004;40921004)资助
作者(Author): 赵芳,胡瑞金
DOI: 10.16441/j.cnki.hdxb.2014.03.003
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