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气候模式CAS-ESM-C对1月热带太平洋流场模态的模拟评估

张东凌 卢姁 张铭 吕庆平

张东凌, 卢姁, 张铭, 等. 2023. 气候模式CAS-ESM-C对1月热带太平洋流场模态的模拟评估[J]. 大气科学, 47(3): 725−738 doi: 10.3878/j.issn.1006-9895.2205.21016
引用本文: 张东凌, 卢姁, 张铭, 等. 2023. 气候模式CAS-ESM-C对1月热带太平洋流场模态的模拟评估[J]. 大气科学, 47(3): 725−738 doi: 10.3878/j.issn.1006-9895.2205.21016
ZHANG Dongling, LU Xu, ZHANG Ming, et al. 2023. Simulation and Evaluation of Climate Model CAS-ESM-C for Flow Field Modes in the Tropical Pacific Ocean in January [J]. Chinese Journal of Atmospheric Sciences (in Chinese), 47(3): 725−738 doi: 10.3878/j.issn.1006-9895.2205.21016
Citation: ZHANG Dongling, LU Xu, ZHANG Ming, et al. 2023. Simulation and Evaluation of Climate Model CAS-ESM-C for Flow Field Modes in the Tropical Pacific Ocean in January [J]. Chinese Journal of Atmospheric Sciences (in Chinese), 47(3): 725−738 doi: 10.3878/j.issn.1006-9895.2205.21016

气候模式CAS-ESM-C对1月热带太平洋流场模态的模拟评估

doi: 10.3878/j.issn.1006-9895.2205.21016
基金项目: 国家重点研发计划项目2016YFB0200800
详细信息
    作者简介:

    张东凌,男,1974年出生,博士、助理研究员,主要从事气候学研究。E-mail: zdl@mail.iap.ac.cn

    通讯作者:

    卢姁,E-mail: xlu2006918@163.com

  • 中图分类号: P732

Simulation and Evaluation of Climate Model CAS-ESM-C for Flow Field Modes in the Tropical Pacific Ocean in January

Funds: National Key Research and Development Program of China (Grant 2016YFB0200800)
  • 摘要: 利用气候模式CAS-ESM-C从1922年起84年的模拟资料,对1月份热带太平洋上层流场作复EOF分解及小波分析,并与实况以及理论解析解作对比讨论,以考察模式对赤道大洋上层流场的模拟能力,得到主要结论:(1)复EOF分解前3个模态的方差贡献为53.5%、12.9%、9.5%,累积方差贡献为75.9%,累积方差贡献比实况更高。(2)第一、二模态空间场与实况相比总体相像,流场都为赤道所俘获,在俘获区内的流场均以偏纬向流为主;差异在于模拟资料分析的赤道俘获区范围较实况要大,流场的经向流分量及越赤道流也较实况明显。(3)第一、二模态实时间系数序列无线性变化趋势,而实况则有。复EOF模态年际及年代际变化与实况相同或相近;第一、二模态中3~7年的年际变化是厄尔尼诺与南方涛动(ENSO)的反映;第一模态22~23年的年代际变化受北太平洋主要气候模态北太平洋年代际振荡(PDO)对热带太平洋的影响,而第二模态13年的年代际变化是受北太平洋次要气候模态北太平洋环流振荡(NPGO)对热带太平洋的影响;第一、二模态还都有峰值16年的年代际变化,这可能与印尼穿越流有关。(4)模拟资料分析的结果具有理论解析解中流场为赤道所俘获及流场为纬向流的特点,只是解析解中因无风应力强迫,流场呈纯纬向流。(5)第一(二)模态在赤道太平洋东部(中部)有海温动力异常,并可称之为东(中)部型ENSO模态。气候模式CAS-ESM-C对热带太平洋上层流场的模拟表现较佳。
  • 图  1  1922~2005年CAS-ESM-C模式模拟的大洋(a)表层、(b)近表层、(c)次表层、(d)上层底流场复EOF分解第一模态的空间场(单位:m s−1)。水深5.0 m、25.0 m、115.0 m和222.5 m的层次分别作为大洋表层、近表层、次表层和上层底的代表

    Figure  1.  First eigenvector pattern (units: m s−1) of CEOF (complex EOF) for flow field simulated by the CAS-ESM-C model depth at (a) the surface, (b) near-surface, (c) sub-surface, and (d) upper bottom of ocean from 1922 to 2005. The layers with water depth of 5.0 m, 25.0 m, 115.0 m, and 222.5 m are representative of the surface, near-surface, sub-surface and upper bottom of ocean, respectively

    图  2  1922~2005年CAS-ESM-C模式模拟的流场复EOF分解第一模态复时间系数的(a)辐角、(b)模

    Figure  2.  (a) Argument and (b) module of complex time coefficient for the first mode of CEOF for flow field simulated by the CAS-ESM-C model from 1922 to 2005

    图  3  1922~2005年CAS-ESM-C模式模拟的流场复EOF分解的(a)第一模态、(b)第二模态复时间系数转化后的实时间系数

    Figure  3.  The real-time coefficient converted from the complex time coefficient of (a) first mode and (b) the second mode for CEOF for flow field simulated by CAS-ESM-C model from 1922 to 2005

    图  4  1922~2005年CAS-ESM-C模式模拟的流场复EOF分解第一模态复时间系数转化后的实时间系数的(a)小波全谱、(b)局地功率谱

    Figure  4.  (a) Wavelet full spectrum and (b) the local power spectrum of the real-time coefficient converted from complex time coefficient of the first mode for CEOF of flow field simulated by the CAS-ESM-C model from 1922 to 2005

    图  5  图1,但为复EOF分解第二模态的空间场

    Figure  5.  As in Fig. 1, but for the second eigenvector pattern of CEOF

    图  6  图4,但为复EOF分解第二模态的(a)小波全谱、(b)局地功率谱

    Figure  6.  As in Fig. 4, but for (a) wavelet full spectrum and (b) the local power spectrum of the second mode for CEOF

    图  7  1922~2005年CAS-ESM-C模式模拟的大洋(a)近表层(25.0 m)、(b)次表层(115.0 m)流场复EOF分解第一模态的垂直速度分布(单位:m s−1

    Figure  7.  Vertical velocity (units: m s−1) for the first mode of CEOF for flow field simulated by the CAS-ESM-C model at (a) near-surface (25.0 m), (b) sub-surface (115.0 m) of ocean from 1922 to 2005

    图  8  图7,但为复EOF分解第二模态的垂直速度分布

    Figure  8.  As in Fig. 7, but for the vertical velocity for the second mode of CEOF

    表  1  1922~2005年第一、二模态各深度上的流场最大值

    Table  1.   Maximum value of the flow field at each depth in the first and second eigenvector patterns from 1922 to 2005

    水深/m流场最大值/cm s−1
    第一模态第二模态
    5.011
    55.011
    105.011
    115.00.91
    125.00.90.9
    135.00.80.8
    145.00.80.7
    156.90.70.6
    178.40.60.5
    222.50.40.4
    下载: 导出CSV
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  • 收稿日期:  2021-01-28
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