黑潮末端与黑潮延伸体海域海表流场EOF分析研究
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摘要
利用17 a的流场资料,分析黑潮末端与黑潮延伸体海域流场的年际变化特征。通过复经验正交函数对流场数据的分析,可发现该海域流场存在准两年的周期变化,同时该海域流场存在对ENSO现象的响应;通过经验正交函数对流场流速大小数据的分析,证实该海域流场存在准两年的周期变化,同时流速大小异常场的经验正交函数分析第二模态可反映黑潮流轴大弯曲现象,北太平洋涛动信号也在第一和第三模态中有所体现。
The annual variation characteristics of sea surface current in the Kuroshio End and Kuroshio Extension region are analyzed using 17-year sea surface current data in this paper. Based on analysis using complex empirical orthogonal function, it is found that the current field has a quasi periodicity of 2 years and shows response to the ENSO events. Applying an empirical orthogonal function(EOF) analysis to the current speed, the quasi periodicity of 2 years is confirmed. The second mode typically shows the large Kuroshio meander. A further indication is that the signal of the North Pacific Oscillation is revealed in both mode 1 and mode 2.
The annual variation characteristics of sea surface current in the Kuroshio End and Kuroshio Extension region are analyzed using 17-year sea surface current data in this paper. Based on analysis using complex empirical orthogonal function, it is found that the current field has a quasi periodicity of 2 years and shows response to the ENSO events. Applying an empirical orthogonal function(EOF) analysis to the current speed, the quasi periodicity of 2 years is confirmed. The second mode typically shows the large Kuroshio meander. A further indication is that the signal of the North Pacific Oscillation is revealed in both mode 1 and mode 2.
引文
[1]潘家祎,袁业立,郑全安.用Geosat高度计数据观测黑潮流系的低频变化Ⅱ.季节及年际变化分析[J].海洋学报,1997,19(4):41-50.
[2]潘丰,张有广,林明森.黑潮延伸体区海平面异常和中尺度涡的时空特征分析[C]//中国海洋学会第五届青年海洋科学家论坛暨首届国家海洋局青年海洋科学基金学术研讨会论文集.杭州:中国海洋学会,首届国家海洋局,2011.
[3]卢姁,徐建,卢艳,等.黑潮末端与黑潮延伸体的流场异常模态分析[J].海洋科学进展,2016,34(1):10-21.
[4]Scharffenberg M.Annual variations of geostrophic currents and eddy kinetic energy inferred from TOPEX/Poseidon-Jason-1Tandem Mission data[C]//Eumetsat Meteorological Satelite Confer ence and,American Meteorological Society.2010:526-534.
[5]Qiu B,Chen S M,Hacker P,et al.The kuroshio extension northern recirculation gyre:profiling float measurements and forcing mechanism[J].Journal of Physical Oceanography,2008,38(8):1764-1779.
[6]路凯程,卢姁,张铭.赤道外北太平洋上层洋流异常分析[J].海洋通报,2011,30(1):29-36.
[7]He Y H,White W B.Interannual variability of the kuroshio frontal structure along its western boundary in the north pacific ocean associated with the 1982 ENSO event[J].Journal of Physical Oceanography,1987,17(9):1494-1506.
[8]张永垂,张立凤,王业桂.北太平洋海表面高度的年际变化及其机制[J].地球物理学报,2010,53(2):247-255.
[9]North G R,Bell T L,Cahalan R F,et al.Sampling errors in the estimation of empirical orthogonal functions[J].Monthly Weather Review,1982,110(7):699-706.
[10]Dommenget D,Latif M.A cautionary note on the interpretation of EOFs[J].Journal of Climate,2002,15(2):216-225.
[11]符淙斌,全小伟,苏炳凯.用复EOF分析EI Ni?o增暖的振幅和位相变化[J].科学通报,1987,32(16):1241-1241.
[12]黄嘉佑.气象统计分析与预报方法[M].北京:气象出版社,1990.
[13]Barnet T P.Interaction of the monsoon and pacific trade wind system at interannual time scales part I:the equatorial zone[J].Monthly Weather Review,1984,111(4):756-773.
[14]卢姁,包赟,吕庆平.热带太平洋上层洋流异常的复EOF分析[J].海洋预报,2014,31(2):56-66.
[15]李崇银,李桂龙.北大西洋涛动和北太平洋涛动的演变与20世纪60年代的气候突变[J].科学通报,1999,44(16):1765-1768.
[16]李杰,杜凌,韩飞,等.黑潮延伸体海域海平面年际变化及其与海流的关系[J].海洋通报,2015,34(2):158-167.
[2]潘丰,张有广,林明森.黑潮延伸体区海平面异常和中尺度涡的时空特征分析[C]//中国海洋学会第五届青年海洋科学家论坛暨首届国家海洋局青年海洋科学基金学术研讨会论文集.杭州:中国海洋学会,首届国家海洋局,2011.
[3]卢姁,徐建,卢艳,等.黑潮末端与黑潮延伸体的流场异常模态分析[J].海洋科学进展,2016,34(1):10-21.
[4]Scharffenberg M.Annual variations of geostrophic currents and eddy kinetic energy inferred from TOPEX/Poseidon-Jason-1Tandem Mission data[C]//Eumetsat Meteorological Satelite Confer ence and,American Meteorological Society.2010:526-534.
[5]Qiu B,Chen S M,Hacker P,et al.The kuroshio extension northern recirculation gyre:profiling float measurements and forcing mechanism[J].Journal of Physical Oceanography,2008,38(8):1764-1779.
[6]路凯程,卢姁,张铭.赤道外北太平洋上层洋流异常分析[J].海洋通报,2011,30(1):29-36.
[7]He Y H,White W B.Interannual variability of the kuroshio frontal structure along its western boundary in the north pacific ocean associated with the 1982 ENSO event[J].Journal of Physical Oceanography,1987,17(9):1494-1506.
[8]张永垂,张立凤,王业桂.北太平洋海表面高度的年际变化及其机制[J].地球物理学报,2010,53(2):247-255.
[9]North G R,Bell T L,Cahalan R F,et al.Sampling errors in the estimation of empirical orthogonal functions[J].Monthly Weather Review,1982,110(7):699-706.
[10]Dommenget D,Latif M.A cautionary note on the interpretation of EOFs[J].Journal of Climate,2002,15(2):216-225.
[11]符淙斌,全小伟,苏炳凯.用复EOF分析EI Ni?o增暖的振幅和位相变化[J].科学通报,1987,32(16):1241-1241.
[12]黄嘉佑.气象统计分析与预报方法[M].北京:气象出版社,1990.
[13]Barnet T P.Interaction of the monsoon and pacific trade wind system at interannual time scales part I:the equatorial zone[J].Monthly Weather Review,1984,111(4):756-773.
[14]卢姁,包赟,吕庆平.热带太平洋上层洋流异常的复EOF分析[J].海洋预报,2014,31(2):56-66.
[15]李崇银,李桂龙.北大西洋涛动和北太平洋涛动的演变与20世纪60年代的气候突变[J].科学通报,1999,44(16):1765-1768.
[16]李杰,杜凌,韩飞,等.黑潮延伸体海域海平面年际变化及其与海流的关系[J].海洋通报,2015,34(2):158-167.