| A sub-surface eddy at inertial current layer in the Canada Basin,Arctic Ocean |
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| 作者姓名： | 史久新 赵进平 矫玉田 曹勇 |
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| 作者单位： | College of Physical and Environmental Oceanography Ocean University of China，College of Physical and Environmental Oceanography，Ocean University of China，College of Physical and Environmental Oceanography，Ocean University of China，College of Physical and Environmental Oceanography，Ocean University of China，Qingdao 266100，China，Qingdao 266100，China，Qingdao 266100，China，Qingdao 266100，China |
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| 摘 要： | An Arctic Ocean eddy in sub-surface layer is analyzed in this paper by use of temperature,salinity and current profiles data obtained at an ice camp in the Canada Basin during the second Chinese Arctic Expedition in summer of 2003.In the vertical temperature section,the eddy shows itself as an isolated cold water block at depth of 60 m with a minimum temperature of-1.5℃,about 0.5℃ colder than the ambient water.Isopycnals in the eddy form a pattern of convex,which indicates the eddy is anticyclonic.Although maximum velocity near 0.4 m s-1 occurs in the current records observed synchronously,the current pattern is far away from a typical eddy.By further analysis,inertial frequency oscillations with amplitudes comparable with the eddy velocity are found in the sub-surface layer currents.After filter the inertial current and mean current,an axisymmetric current pattern of an eddy with maximum velocity radius of 5 km is obtained.The analysis of the T-S characteristics of the eddy core water and its ambient waters supports the conclusion that the eddy was formed on the Chukchi Shelf and migrated northeastward into the northern Canada Basin.
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| 关 键 词： | 惯性流 表面分层 北冰洋 漩涡 |
A sub-surface eddy at inertial current layer in the Canada Basin, Arctic Ocean |
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| Shi Jiuxin,Zhao Jinping,Jiao Yutian,Cao Yong.A sub-surface eddy at inertial current layer in the Canada Basin,Arctic Ocean[J].Chinese Journal of Polar Science,2007,18(2):135-146. |
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| Authors: | Shi Jiuxin Zhao Jinping Jiao Yutian Cao Yong |
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| Institution: | College of Physical and Environmental Oceanography, Ocean University of China, Qingdao 266100, China |
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| Abstract: | An Arctic Ocean eddy in sub-surface layer is analyzed in this paper by use of temperature, salinity and current profiles data obtained at an ice camp in the Canada Basin during the second Chinese Arctic Expedition in summer of 2003.In the vertical temperature section, the eddy shows itself as an isolated cold water block at depth of 60 m with a minimum temperature of-1.5℃, about 0.5℃ colder than the ambient water.Isopycnals in the eddy form a pattern of convex, which indicates the eddy is anticyclonic.Although maximum velocity near O.4 m s-1 occurs in the current records observed synchronously, the current pattern is far away from a typical eddy.By further analysis, inertial frequency oscillations with amplitudes comparable with the eddy velocity are found in the sub-surface layer currents.After filter the inertial current and mean current, an axisymmetric current pattern of an eddy with maximum velocity radius of 5 km is obtained.The analysis of the T-S characteristics of the eddy core water and its ambient waters supports the conclusion that the eddy was formed on the Chukchi Shelf and migrated northeastward into the northern Canada Basin. |
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| Keywords: | Eddy Inertial current Sub-surface layer Arctic Ocean |
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