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Volume 8 Issue 3

Jul.  1991

Article Contents

Seasonal Characteristics and Interannual Variability of Monthly Scale Low-Frequency Oscillation in a Low-Order Global Spectral Model


doi: 10.1007/BF02919613

  • Analysis is done of five-year low-pass filtered data by a Five-layer low-order global spectral model, indicating that although any non-seasonal external forcing is not considered in the model atmosphere, monthly-scale anomaly takes place which is of remarkable seasonality and interannual variability.Analysis also shows that for the same seasonal external forcing the model atmosphere can exhibit two climatic states, similar in the departure pattern but opposite in sign, indicating that the anomaly is but the manifestation of the adverse states, which supports the theory of multi-equilibria proposed by Charney and Devore (l979) once again.Finally, the source for the low-frequency oscillation of the global atmosphere is found to be the convective heat source / sink inside the tropical atmosphere as discussed before in our study.Therefore, the key approach to the exploration of atmospheric steady low-frequency oscillation and the associ-ated climatic effect lies in the examination of the distribution of convective heat sources / sinks and the variation in the tropical atmosphere.
  • [1] Fu Congbin, Ye Duzheng, 1988: THE TROPICAL VERY LOW-FREQUENCY OSCILLATION ON INTERANNUAL SCALE, ADVANCES IN ATMOSPHERIC SCIENCES, 5, 369-388.  doi: 10.1007/BF02656760
    [2] Yan Jinghua, Chen Longxun, Wang Gu, 1988: THE PROPAGATION CHARACTERISTICS OF INTERANNUAL LOW-FREQUENCY OSCILLATIONS IN THE TROPICAL AIR-SEA SYSTEM, ADVANCES IN ATMOSPHERIC SCIENCES, 5, 405-420.  doi: 10.1007/BF02656787
    [3] Chen Longxun, Zhu Congwen, Wang Wen, Zhang Peiqun, 2001: Analysis of the Characteristics of 30-60 Day Low-Frequency Oscillation over Asia during 1998 SCSMEX, ADVANCES IN ATMOSPHERIC SCIENCES, 18, 623-638.  doi: 10.1007/s00376-001-0050-0
    [4] Fu Zuntao, Liu Shikuo, Fu Caixia, 1998: Low-Frequency Waves Forced by Large-scale Topography in the Barotropic Model, ADVANCES IN ATMOSPHERIC SCIENCES, 15, 312-320.  doi: 10.1007/s00376-998-0003-y
    [5] HE Jinhai, YU Jingjing, SHEN Xinyong, 2007: Impacts of SST and SST Anomalies on Low-Frequency Oscillation in the Tropical Atmosphere, ADVANCES IN ATMOSPHERIC SCIENCES, 24, 377-382.  doi: 10.1007/s00376-007-0377-2
    [6] Li Maicun, 1987: ON THE LOW-FREQUENCY, PLANETARY-SCALE MOTION IN THE TROPICAL ATMOSPHERE AND OCEANS, ADVANCES IN ATMOSPHERIC SCIENCES, 4, 249-263.  doi: 10.1007/BF02663596
    [7] Lu Keli, Zhu Yongchun, 1994: Seasonal Variation of Stationary and Low-Frequency Rossby Wave Rays, ADVANCES IN ATMOSPHERIC SCIENCES, 11, 427-435.  doi: 10.1007/BF02658163
    [8] Mozheng Wei, 1996: A Low-order Model of Two-dimensional Fluid Dynamics on the Surface of a Sphere, ADVANCES IN ATMOSPHERIC SCIENCES, 13, 67-90.  doi: 10.1007/BF02657029
    [9] FENG Junqiao, HU Dunxin, YU Lejiang, 2012: Low-Frequency Coupled Atmosphere--Ocean Variability in the Southern Indian Ocean, ADVANCES IN ATMOSPHERIC SCIENCES, 29, 544-560.  doi: 10.1007/s00376-011-1096-2
    [10] LI Yuefeng, 2007: Conversion of Kinetic Energy from Synoptic Scale Disturbance to Low-Frequency Fluctuation over the Yangtze River Valley in the Summers of 1997 and 1999, ADVANCES IN ATMOSPHERIC SCIENCES, 24, 591-598.  doi: 10.1007/s00376-007-0591-y
    [11] FuZuntao, Zhao Qiang, QiaoFangli, Liu Shikuo, 2000: Response of Atmospheric Low-frequency Wave to Oceanic Forcing in the Tropics, ADVANCES IN ATMOSPHERIC SCIENCES, 17, 569-575.  doi: 10.1007/s00376-000-0020-y
    [12] Lu Peisheng, 1993: The Propagation of Disturbances Excited by Low-Frequency Oscillations in the Tropics, ADVANCES IN ATMOSPHERIC SCIENCES, 10, 287-295.  doi: 10.1007/BF02658134
    [13] Li Guitong, Li Chongyin, 1998: Activities of Low-Frequency Waves in the Tropical Atmosphere and ENSO, ADVANCES IN ATMOSPHERIC SCIENCES, 15, 193-203.  doi: 10.1007/s00376-998-0039-z
    [14] Wang Huijun, 2000: The Seasonal Climate and Low Frequency Oscillation in the Simulated Mid-Holocene Megathermal Climate, ADVANCES IN ATMOSPHERIC SCIENCES, 17, 445-457.  doi: 10.1007/s00376-000-0035-4
    [15] Ni Yunqi, Bette L. Otto-Bliesner, David D. Houghton, 1988: THE EFFECTS OF TOPOGRAPHY ON THE SUMMER ATMOS-PHERIC ENERGETICS OF THE NORTHERN HEMISPHERE IN A LOW-RESOLUTION GLOBAL SPECTRAL MODEL, ADVANCES IN ATMOSPHERIC SCIENCES, 5, 181-194.  doi: 10.1007/BF02656780
    [16] FAN Ke, WANG Huijun, 2007: Dust Storms in North China in 2002: A Case Study of the Low Frequency Oscillation, ADVANCES IN ATMOSPHERIC SCIENCES, 24, 15-23.  doi: 10.1007/s00376-007-0015-z
    [17] Zhang Ren, Yu Zhihao, 2000: Low-Frequency CISK-Rossby Wave and Stratospheric QBO in the Tropical Atmosphere, ADVANCES IN ATMOSPHERIC SCIENCES, 17, 311-321.  doi: 10.1007/s00376-000-0012-y
    [18] Fang ZHOU, Hong-Li REN, 2017: Dynamical Feedback between Synoptic Eddy and Low-Frequency Flow as Simulated by BCC_CSM1.1(m), ADVANCES IN ATMOSPHERIC SCIENCES, 34, 1316-1332.  doi: 10.1007/s00376-017-6318-9
    [19] Jiapeng MIAO, Tao WANG, Huijun WANG, Yongqi GAO, 2018: Influence of Low-frequency Solar Forcing on the East Asian Winter Monsoon Based on HadCM3 and Observations, ADVANCES IN ATMOSPHERIC SCIENCES, 35, 1205-1215.  doi: 10.1007/s00376-018-7229-0
    [20] WangHuijun, Xue Feng, Bi Xunqiang, 1997: The Interannual Variability and Predictability in a Global Climate Model, ADVANCES IN ATMOSPHERIC SCIENCES, 14, 554-562.  doi: 10.1007/s00376-997-0073-2

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Manuscript History

Manuscript received: 10 July 1991
Manuscript revised: 10 July 1991
通讯作者: 陈斌, bchen63@163.com
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Seasonal Characteristics and Interannual Variability of Monthly Scale Low-Frequency Oscillation in a Low-Order Global Spectral Model

  • 1. Department of Atmospheric Sciences, Nanjing University,Nanjing Institute of Meteorology,Department of Atmospheric Sciences, Nanjing University

Abstract: Analysis is done of five-year low-pass filtered data by a Five-layer low-order global spectral model, indicating that although any non-seasonal external forcing is not considered in the model atmosphere, monthly-scale anomaly takes place which is of remarkable seasonality and interannual variability.Analysis also shows that for the same seasonal external forcing the model atmosphere can exhibit two climatic states, similar in the departure pattern but opposite in sign, indicating that the anomaly is but the manifestation of the adverse states, which supports the theory of multi-equilibria proposed by Charney and Devore (l979) once again.Finally, the source for the low-frequency oscillation of the global atmosphere is found to be the convective heat source / sink inside the tropical atmosphere as discussed before in our study.Therefore, the key approach to the exploration of atmospheric steady low-frequency oscillation and the associ-ated climatic effect lies in the examination of the distribution of convective heat sources / sinks and the variation in the tropical atmosphere.

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