The study of temperature decadal oscillation and meridional propagation in the southeast Indian Ocean
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摘要: 用SODA资料分析了热带西南印度洋上升区温度距平与整个南印度洋温度距平的时滞相关, 发现热带西南印度洋上升区温度距平与65°S, 105°E附近200 m深度的温度距平存在滞后10 a的相关振荡, 同时探讨了其可能的机制为温跃层内的斜压内波驱动, 即65°S, 105°E附近200 m深度的温度距平沿着温跃层上层在东南印度洋沿岸从高纬度向低纬的传播, 传播时间大约为10 a左右, 这种信号在传播过程中表现得较弱, 而在起点和终点的两端振荡比较强。波动的传播相比振荡本身要显得弱。Abstract: The temperature anomalies lag relationship between whole south Indian Ocean and the upper welling region of the southwest tropical Indian Ocean is investigated using the Simple Ocean Data Assimilation (SODA) oceanic reanalyses. The results indicate that the signal of temperature anomalies propagates from high latitude to low latitude along thermocline in the southeast Indian Ocean. It is found that the atmospheric perturbation drive the signal in the ocean located around 65°S, 105°E at the beginning, then it reaches to southeast Indian Ocean after about 10 a. The possible reason is also discussed in this study.
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吕俊梅. 亚洲夏季风的季节内、年际和年代际变异及其成因研究[D]. 北京:中国科学院大气物理研究所, 2005. 梁平德. 印度夏季风与我国华北夏季降水量[J].大气科学, 1988, 46(1):75-81. 蔡怡, 李海, 张人禾, 等. 热带印度洋海温异常与 ENSO关系的进一步研究[J].气象学报, 2008, 66(1):120-124. Xie S P, Annamalai H, Schott F A, et al. Structure and mechanism of South Indian Ocean climate variability[J]. J Clim, 2002, 15:864-878. Hermes J C, Reason1 C J C. Annual cycle of the South Indian Ocean (Seychelles-Chagos) thermocline ridge in a regional ocean model[J].Journal of Geophysical Research, 2008, 113: C04035, doi: 10.1029/2007JC004363. 蔡怡, 凌铁军, 张志华, 等. 2011热带西南印度洋上升流季节和年际变化研究及与印太系统海气相互作用[J]. 海洋学报, 34(6):42-49. Carton J A, Giese B S.A reanalysis of ocean climate using Simple Ocean Data Assimilation (SODA)[J]. Mon Wea Rev, 2008, 136: 2999-3017. Smith R D, Dukowicz J K, Malone R C. Parallel ocean general circulation modeling[J]. Physica D, 1992, 60:38-61, doi: 10.1016/0167-2789(92)90225-C. Liu Z Y. Forced planetary wave response in a thermocline gyre[J]. Journal of Physical Oceanography, 1999, 29(5):1036-1055. Schneider N, Miller A J, Alexander M A. Subduction of decadal North Pacific temperature anomalies: Observations and dynamics[J]. J Phys Oceanogr, 1999, 29(5): 1056-1070.
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