Advances in Atmospheric Sciences

, Volume 32, Issue 5, pp 585–600 | Cite as

Major modes of short-term climate variability in the newly developed NUIST Earth System Model (NESM)

  • Jian Cao
  • Bin Wang
  • Baoqiang Xiang
  • Juan Li
  • Tianjie Wu
  • Xiouhua Fu
  • Liguang Wu
  • Jinzhong Min
Open Access


A coupled earth system model (ESM) has been developed at the Nanjing University of Information Science and Technology (NUIST) by using version 5.3 of the European Centre Hamburg Model (ECHAM), version 3.4 of the Nucleus for European Modelling of the Ocean (NEMO), and version 4.1 of the Los Alamos sea ice model (CICE). The model is referred to as NUIST ESM1 (NESM1). Comprehensive and quantitative metrics are used to assess the model’s major modes of climate variability most relevant to subseasonal-to-interannual climate prediction. The model’s assessment is placed in a multi-model framework. The model yields a realistic annual mean and annual cycle of equatorial SST, and a reasonably realistic precipitation climatology, but has difficulty in capturing the spring-fall asymmetry and monsoon precipitation domains. The ENSO mode is reproduced well with respect to its spatial structure, power spectrum, phase locking to the annual cycle, and spatial structures of the central Pacific (CP)-ENSO and eastern Pacific (EP)-ENSO; however, the equatorial SST variability, biennial component of ENSO, and the amplitude of CP-ENSO are overestimated. The model captures realistic intraseasonal variability patterns, the vertical-zonal structures of the first two leading predictable modes of Madden-Julian Oscillation (MJO), and its eastward propagation; but the simulated MJO speed is significantly slower than observed. Compared with the T42 version, the high resolution version (T159) demonstrates improved simulation with respect to the climatology, interannual variance, monsoon-ENSO lead-lag correlation, spatial structures of the leading mode of the Asian-Australian monsoon rainfall variability, and the eastward propagation of the MJO.

Key words

coupled climate model earth system model climate variability 


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Copyright information

© The Authors 2015

Authors and Affiliations

  • Jian Cao
    • 1
    • 2
    • 3
  • Bin Wang
    • 1
    • 2
    • 3
    • 4
  • Baoqiang Xiang
    • 5
    • 6
  • Juan Li
    • 3
  • Tianjie Wu
    • 1
    • 2
    • 3
  • Xiouhua Fu
    • 1
    • 2
    • 3
  • Liguang Wu
    • 1
    • 2
  • Jinzhong Min
    • 1
    • 2
  1. 1.Earth System Modeling CenterNanjing University of Information Science and TechnologyNanjingChina
  2. 2.Key Laboratory of Meteorological Disaster of Ministry of EducationNanjing University of Information Science and TechnologyNanjingChina
  3. 3.International Pacific Research CenterUniversity of Hawaii at ManoaHonoluluUSA
  4. 4.Department of Atmospheric SciencesUniversity of Hawaii at ManoaHonoluluUSA
  5. 5.NOAA/Geophysical Fluid Dynamics LaboratoryPrincetonUSA
  6. 6.University Corporation for Atmospheric ResearchBoulderUSA

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