| FGOALS－g快速耦合模式模拟的北太平洋年代际变率 |
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| 引用本文： | 朱益民,杨修群,俞永强,赵珊珊,孙旭光,谭言科.FGOALS－g快速耦合模式模拟的北太平洋年代际变率[J].地球物理学报,2008,51(1):58-69. |
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| 作者姓名： | 朱益民 杨修群 俞永强 赵珊珊 孙旭光 谭言科 |
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| 作者单位： | 1.中国科学院大气物理研究所大气科学和地球流体力学数值模拟国家重点实验室（LASG），;北京 100029;2.解放军理工大学气象学院，南京 211101;3.南京大学灾害性天气气候研究所，南京 210093;4.中国气象局国家气候中心，北京 100081 |
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| 基金项目： | 国家自然科学基金，国家重点基础研究发展计划(973计划)，中国科学院基金，中国科学院大气物理研究所资助项目 |
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| 摘 要： | 本文分析了由中国科学院大气物理研究所大气科学和地球流体力学数值模拟国家重点实验室（LASG/IAP）最新发展的FGOALS－g快速耦合模式300 a积分模拟结果，通过与多种观测资料的对比分析，讨论了北太平洋年代际变率的时空结构、主要年代际模态的演变特征以及与ENSO的联系等研究内容. 结果表明：该模式能成功模拟出北太平洋年代际变率的主要空间分布特征；模拟的年代际模态具有多时间尺度性，其中最显著的是周期约为10～20 a左右的准20年振荡模态，该模态上层海洋热容量异常的演变过程主要表现为大致沿副热带海洋涡旋做海盆尺度顺时针旋转的特征，相应的大气异常不仅与阿留申低压的变异有关，而且与太平洋-北美PNA）遥相关型以及上游的欧亚大气环流异常有密切关系；模拟的北太平洋年代际变率对年际ENSO循环的发生频率和强度有明显的调制作用. 但模拟的KOE区和阿拉斯加湾SST异常振幅比观测偏强，这与模式海冰偏多、高纬度SST偏冷的误差有关.
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| 关 键 词： | FGOALS－g快速耦合模式 年代际变率 太平洋年代际振荡(PDO) ENSO |
| 文章编号： | 0001-5733（2008）01-0058-12 |
| 收稿时间： | 2006-09-15 |
| 修稿时间： | 2007-09-04 |
Decadal variability in the North Pacific as simulated by FGOALS—g fast coupled climate model |
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| ZHU Yi-Min,YANG Xiu-Qun,YU Yong-Qiang,ZHAO Shan-Shan,SUN Xu-Guang,TAN Yan-Ke.Decadal variability in the North Pacific as simulated by FGOALS—g fast coupled climate model[J].Chinese Journal of Geophysics,2008,51(1):58-69. |
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| Authors: | ZHU Yi-Min YANG Xiu-Qun YU Yong-Qiang ZHAO Shan-Shan SUN Xu-Guang TAN Yan-Ke |
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| Institution: | 1.LASG, Institute of Atmospheric Physics, Chinese Academy of Sciences, Be;ijing 100029, China;2.Institute of Meteorology, PLA University of Science and Te;chnology, Nanjing 211101, China;3.Institute of Severe Weather and Climate, Nanjing University, Nanjing 210093, China;4.National Climate Center, China Meteorological Administration, Beijing 100081, China |
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| Abstract: | This study examines the North Pacific decadal-to-interdecadal variabilities as simulated by a fast version of the coupled climate modelnamely FGOALS－g developed at LASG/IAP. The spatio temporal structures of those variabilities and the evolution of the dominant mode together with its relation to El Nino-Southern Oscillation (ENSO) are analyzed with a 300-yr integration of the coupled model. The results indicate that the model reproduces well many features of the observed North Pacific variability. Similar to that in reality, the simulated modes are characterized by timescales ranging from decades to multidecades. However, the most prominent mode is a bidecadal mode with a principal period roughly 10～20-yr. The evolution of the bidecadal mode xhibits a clockwise rotation of the upper-ocean heat content anomalies in an association with the subtropical gyre. The corresponding atmospheric circulation anomalies are associated with the variabilities of Aleutian low, Pacific North American (PNA) teleconnection and atmospheric circulation over Eurasia. Both the simulation and the observation show that the North Pacific decadal-to-interdecadal variabilities play an important role in modulating the frequency and strength of interannual ENSO events. However, the simulated SST anomalies are fairly larger than that of observations in Kuroshio/Oyashio Extension (KOE) region and Gulf of Alaska. This may be attributed to the excessive sea ice coverage error and SST cool biases over high-latitude in coupled model. |
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| Keywords: | ENSO |
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