The effects of the binary typhoon on the surface wave field in the South China Sea (SCS) were investigated using the third-generation wave model WaveWatch Ⅲ (WWⅢ). The surface wave field during the binary typhoons Sarika and Haima (2016) was reproduced with blended winds and two nested domains, and the simulation results obtained are in good agreement with the satellite altimeter data. To investigate different wave characteristics under binary and individual typhoons, a numerical experiment was designed with the multi-annual mean winds replacing one cyclone of the blended binary typhoons, and its results were compared with the simulation results of realistic binary typhoons. The comparison suggests that the surface waves induced by the binary typhoon not only have higher intensity, but also exhibit more complex behaviors. Binary typhoons cause an increase in the significant wave height (H_s) inside the maximum wind radius of the latter typhoon (Haima). Factors affecting the enhanced H_s on the surface wave field include typhoon intensity, maximum wind radius, and typhoon translation speeds. The interactions between waves generated by Haima and Sarika enhance extreme waves by 4%–5%. The response of wave characteristics of Sarika and Haima to the monsoon winds is different. For wave spectra, bi-modal features are widespread on the surface wave field between the interval of the two typhoons, even if the separation distance between them is greater than 1700 km.

利用第三代波浪模型WaveWatchⅢ（WWⅢ），研究了二元台风对南海（SCS）表面波场的影响。利用混合风和两个嵌套域再现了二元台风Sarika和Haima（2016）期间的表面波场，并且获得的模拟结果与卫星高度计数据吻合良好。为了研究二元和个别台风下的不同波浪特征，设计了一个数值实验，用多年平均风代替混合二元台风的一个旋风，并将其结果与实际二元台风的模拟结果进行了比较。比较表明，二元台风引起的表面波不仅强度更高，而且表现出更复杂的行为。H _s）位于后一个台风（Haima）的最大风半径内。影响表面波场上增强的H _s的因素包括台风强度，最大风半径和台风平移速度。Haima和Sarika产生的波浪之间的相互作用将极端波浪增强了4％–5％。Sarika和Haima的波浪特征对季风的响应是不同的。对于波谱，双峰特征在两个台风间隔之间的表面波场上很普遍，即使它们之间的间隔距离大于1700 km。