Abstract: As a key indicator of global climate change, ocean heat content (OHC) accurately reflects the net energy budget of the Earth system, and its spatiotemporal variations significantly influence the genesis and intensification of typhoons. Based on the GDCSM_Argo global ocean reanalysis dataset featuring long-term time series and multi-parameter observations, this study preliminarily investigates the regulatory and responsive roles of upper- and middle-layer OHC in typhoon activity using lagged regression and correlation analysis. The results demonstrate that near-surface OHC directly modulates typhoon occurrence frequency, while middle and deep OHC sustains typhoon energy through vertical mixing, with all layers exhibiting 1-6 months of lagged response to typhoon activity. The typhoon-induced "cold wake" effect significantly reduces ocean stratification stability along storm tracks, particularly in the typhoon intensification zone (10°N-25°N, 120°E-145°E), where low Richardson number values above the mixed layer highly coincides with the position of the typhoon's maximum wind speed. The OHC-typhoon relationship exhibits notable sensitivity to anomalous climate conditions: during El Niño, typhoons move eastward and affect areas with deeper thermocline layers, making it easier for wind agitation to penetrate the subsurface and transport heat downwards, temporarily weakening stratification; during La Niña, the number of typhoons increases relatively and their paths move westward, with typhoons active in the high heat content western Pacific.. These findings provide theoretical foundations for further research on ocean-atmosphere interaction mechanisms governing extreme weather events, while simultaneously validating GDCSM_Argo reanalysis data as a robust resource for systematic air-sea interaction studies.

Key words: Ocean heat content, typhoon, Regulation and response, Richardson number, climate change