• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Ocean Dynamics >A seasonal dipolar eddy near Ras Al Hamra (Sea of Oman)
【24h】

A seasonal dipolar eddy near Ras Al Hamra (Sea of Oman)

机译：Ras Al Hamra（阿曼海）附近的季节性偶极涡

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Trajectories and hydrological data from two Argo floats indicate that warm and salty water at 200–300-m depths was ejected from the coast of Oman, near Ras al Hamra, in spring 2008, 2011, and 2012. This warm and salty water, Persian Gulf Water (PGW), once ejected from the coast, recirculated cyclonically in the western Sea of Oman, but also flowed eastward along the Iranian and Pakistani coasts. There, it was expelled seaward by mesoscale eddies as shown by other float data. Seasonal maps of salinity were computed from all available Argo floats; they showed that, in spring, PGW is present in the middle and north of the Sea of Oman, contrary to fall, when the salinity maxima lie southeast of Ras al Hadd. The ejection of PGW from Ras al Hamra is related here to the influence of a mesoscale dipolar eddy which often appears near this cape in spring. The time-averaged and empirical orthogonal functions of altimetric maps over 11 years for this season confirm the frequent presence and the persistence of this feature. From surface currents and hydrology, deep currents were computed via thermal wind balance, and the associated shear and strain fields were obtained. This deformation field is intense near Ras al Hamra, with an offshore direction. This flow structure associated with the mesoscale dipole explains PGW ejection from the coast. This observation suggests that PGW distribution in the Northern Arabian Sea can be strongly influenced by seasonal mesoscale eddies.
机译：来自两个Argo浮标的轨迹和水文数据表明，2008年，2011年和2012年春季，从Ras al Hamra附近的阿曼海岸喷出了200-300 m深度的温暖和咸水。这种温暖和咸水是波斯语海湾水（PGW）曾经从海岸喷出，在阿曼西部海域进行了旋流再循环，但也沿伊朗和巴基斯坦海岸向东流动。在那里，它被中等尺度的涡流向海驱逐，如其他浮点数据所示。从所有可用的Argo浮游物计算出盐度的季节性图；他们发现，春季时，盐度最大值位于拉斯哈德（Ras al Hadd）东南，阿曼海中部和北部存在PGW，与秋季相反。从拉斯·哈姆拉（Ras al Hamra）喷出的PGW与中尺度偶极涡的影响有关，这种涡通常在春季出现在该海角附近。该季节超过11年的时间平均和经验正交图函数证实了该特征的频繁出现和持久性。从地表水流和水文，通过热风平衡计算深水流，并获得相关的剪切和应变场。该变形场在Ras al Hamra附近具有近海方向，强度很高。与中尺度偶极子相关的这种流动结构解释了PGW从海岸的喷射。该观察结果表明，北阿拉伯海的PGW分布可能受到季节性中尺度涡旋的强烈影响。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号