Near-inertial internal waves (NIWs) are crucial energy sources for deep-sea mixing, but the origins of deep NIWs have remained largely unknown. A research team led by Prof. Wang Fan from the Institute of Oceanology of the Chinese Academy of Sciences (IOCAS) has made advancements in understanding the generation mechanisms of deep near-inertial kinetic energy (NIKE). Their findings were published in Geophysical Research Letters.