ENSO是年际尺度上最为突出的海气耦合现象，是我国短期气候预测的关键预报因子。20世纪90年代末中部型（CP）El Niño的发现，对ENSO的理论提出新的挑战，加大ENSO的预测难度。近期，跨海盆间相互作用受到了广泛的关注，然而热带北大西洋SST调制CP El Niño生成的机制尚未有成熟理论。为此，本项目拟利用统计分析、动力诊断和数值模拟等技术手段，以春季热带北大西洋 SST异常偏冷/暖为切入点，比较不同情况下CP El Niño在发展过程中的海气耦合特征，归纳不同CP El Niño生成的关键因子；通过寻找其与热带北大西洋SST的联系，阐述热带北大西洋SST影响不同CP El Niño的物理过程。通过上述研究，本项目试图揭示热带北大西洋SST对CP El Niño的调制机制，丰富ENSO多样性理论，提高我国短期气候预测能力。

ENSO is the most prominent air-sea coupling phenomenon on the interannual scale and a key predictor of short-term climate prediction in China. The discovery of the central type (CP) El Niño in the late 1990s presented new challenges to the theory of ENSO and made the prediction of ENSO more difficult. Recently, the interaction between trans-basin basins has received extensive attention. However, the mechanism of the modulation of CP El Niño by SST in the north tropical Atlantic has not yet reached a mature theory. So, this project intends to use statistical analysis, dynamic diagnosis, and numerical simulation to research this question. First, characteristics of CP El Niño during the development of the sea-air coupling under different north tropical Atlantic SST conditions will be compared. Then, the key factors for the generation of different CP El Niño will be summarized and its connection with the north tropical Atlantic SST will be sought. Finally, the physical process of the tropical North Atlantic SST affecting different CP El Niño will be explained. Through the above research, this project attempts to reveal the modulation mechanism of north tropical Atlantic SST on CP El Niño, enrich the ENSO diversity theory, and improve China's short-term climate prediction capabilities.