首页 | 期刊简介 | 编委会 | 投稿指南 | 常用下载 | 联系我们 | 期刊订阅 | In English
引用本文:韩雪,冯俊乔.太平洋内部副热带-热带经向翻转环流的季节变化特征.海洋与湖沼,2022,53(1):8-18.
【打印本页】   【HTML】   【下载PDF全文】   查看/发表评论  下载PDF阅读器  关闭
←前一篇|后一篇→ 过刊浏览    高级检索
本文已被:浏览 454次   下载 448 本文二维码信息
码上扫一扫!
分享到: 微信 更多
太平洋内部副热带-热带经向翻转环流的季节变化特征
韩雪1,2,3,4, 冯俊乔1,2,4,5
1.中国科学院海洋环流与波动重点实验室 山东青岛 266071;2.中国科学院海洋研究所 山东青岛 266071;3.中国科学院大学 北京 100049;4.中国科学院海洋大科学研究中心 山东青岛 266071;5.青岛海洋科学与技术试点国家实验室海洋动力过程与气候功能实验室 山东青岛 266237
摘要:
太平洋内部副热带-热带经向翻转环流(subtropical-tropical cell,STC)是连接热带和副热带的海洋通道。由于以往海洋观测资料的匮乏,前人多利用海洋模式数据进行研究,且仅限于沿单一纬度上的STC的分析,较少涉及沿不同纬度的STC的季节变异规律。利用地转海洋学实时观测阵(array for real-time geostrophic oceanography,Argo)温盐数据、海洋再分析数据GODAS (global ocean data assimilation system)、SODA3.4.2(simple ocean data assimilation 3.4.2)、ORAS5(ocean reanalysis system 5)和大气再分析数据NCEP (National Centers for Environmental Prediction)等研究了沿不同纬度的STC的季节变异规律及其机制。结果显示:沿10°~2°S和2°~6°N,STC春季强,夏秋弱;沿7°~15°N,STC夏季偏强,冬季偏弱;沿15°~11°S,STC冬季偏强,夏季偏弱。STC季节变化主要由表面风场和西传Rossby波驱动,且在不同纬度,二者相对贡献存在差异:在10°S~6°N,STC的季节变化基本与风场季节变化一致,风场直接驱动是STC季节变化的主要因素;在15°~11°S以及7°~10°N,STC变化滞后风场3~4个月,在11°~15°N,STC变化滞后风场9个月,因此,西传Rossby波较局地风场对STC季节变化的贡献更大。本研究对于深入理解STC的变异规律及其对热带海洋气候变化的影响具有重要意义,多源海洋再分析数据的诊断对比分析也为大洋环流研究提供了重要参考。
关键词:  STC  季节变化  经向输运
DOI:10.11693/hyhz20210800186
分类号:P731
基金项目:国家自然科学基金,41976027号;中国科学院先导科技专项B子课题,XDB42010403号。
附件
SEASONAL VARIABILITY OF SUBTROPICAL–TROPICAL MERIDIONAL OVERTURNING CIRCULATION IN THE PACIFIC
HAN Xue1,2,3,4, FENG Jun-Qiao1,2,4,5
1.Key Laboratory of Ocean Circulation and Waves, Chinese Academy of Sciences, Qingdao 266071, China;2.Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China;3.University of Chinese Academy of Sciences, Beijing 100049, China;4.Center for Ocean Mega-Science, Chinese Academy of Sciences, Qingdao 266071, China;5.Laboratory for Ocean Dynamics and Climate, Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao 266237, China
Abstract:
The subtropical-tropical cell (STC) in the Pacific Ocean is an ocean channel connecting the tropical and subtropical oceans. Due to the lack of ocean observation data, mostly available studies use ocean model data only, which limited the analysis of STC along a single latitude, and were less involved in the seasonal variation of STC along different latitudes. Based on Argo (Array for Real-time Geostrophic Oceanography) temperature and salinity data, GODAS (Global Ocean Data Assimilation System), SODA3.4.2 (Simple Ocean Data Assimilation 3.4.2), ORAS5 (Ocean ReAnalysis System 5), and NCEP (National Centers for Environmental Prediction) reanalysis data, the seasonal variations of STC along different latitudes in the Pacific as well as its mechanism are investigated in this study. Results show that along 10°~2°S and 2°~6°N, STC is stronger in spring and weaker in summer and autumn; at 7°~15°N, STC is stronger in summer and weaker in winter; at 15°~11°S, STC is stronger in winter and weaker in summer. The seasonal variation of STC is mainly driven by surface wind field and westward Rossby wave, and their relative contributions are different at different latitudes: at 10°S~6°N, the seasonal variation of STC is basically consistent with the seasonal variation of wind field, indicating that the seasonal variation of STC is mainly attributed to the sea surface wind forcing; At 15°~11°S and 7°~10°N, the STC variation lags behind the wind field for 3~4 months, and at 11°~15°N, the STC variation lags behind the wind field for 9 months. Therefore, the westward propagating of the Rossby wave plays an important role in the seasonal variation of STC than that of the local wind field. This study offered insightful view for in-depth understanding of the variation of STC and its impact on tropical ocean climate change. The diagnosis and comparative analysis of multi-source ocean reanalysis data also provides an important reference for the study of ocean circulation.
Key words:  subtropical-tropical cell (STC)  seasonal variation  meridional transport
版权所有 海洋与湖沼 Oceanologia et Limnlolgia Sinica Copyright©2008 All Rights Reserved
主管单位:中国科协技术协会 主办单位:中国海洋湖沼学会
地址:青岛市福山路32号  邮编:266071  电话:0532-82898753  E-mail:ols@qdio.ac.cn
技术支持:北京勤云科技发展有限公司