The paper presents an objectively analyzed global air–sea heat flux dataset for the ice-free oceans from 1981 to 2005, developed through the integration of satellite remote sensing data, atmospheric reanalyses, and surface meteorological observations. The study improves estimates of latent and sensible heat fluxes by combining satellite retrievals, ship observations, and numerical weather prediction (NWP) reanalyses using a variational objective analysis method. This approach enhances the accuracy and spatial coverage of heat flux estimates, which are essential for climate studies. The analysis reveals a significant long-term increase in latent heat flux (LHF) over the 25-year period, with a global average increase of about 9 W m⁻², representing a 10% increase in the mean value. The LHF trends are closely correlated with sea surface temperature (SST) trends, indicating that oceanic warming is driving increased latent heat loss. The study also highlights seasonal and interannual variability in LHF and sensible heat flux (SHF), with the largest seasonal variations occurring in the extratropical regions during fall and winter. The results show that the global oceanic latent heat loss has increased significantly, with the largest increases observed in the tropical Indian and western Pacific warm pools and along the boundaries of major ocean currents. The study also finds that the increase in LHF is influenced by changes in sea–air humidity difference (Δq) and wind speed (U), with Δq being a key factor linking SST and LHF. The analysis further indicates that the upward trend in U enhances the effect of Δq on LHF, contributing to the continued increase in latent heat loss. The study underscores the importance of accurate air–sea heat flux data for understanding climate variability and the role of the oceans in the coupled ocean–atmosphere system. The dataset provides valuable insights into the relationship between oceanic heat fluxes and atmospheric circulation, as well as the impact of global warming on oceanic and atmospheric processes. The findings suggest that the observed increase in LHF is consistent with the warming of the global oceans and highlights the need for continued monitoring and analysis of air–sea fluxes to better understand climate change.The paper presents an objectively analyzed global air–sea heat flux dataset for the ice-free oceans from 1981 to 2005, developed through the integration of satellite remote sensing data, atmospheric reanalyses, and surface meteorological observations. The study improves estimates of latent and sensible heat fluxes by combining satellite retrievals, ship observations, and numerical weather prediction (NWP) reanalyses using a variational objective analysis method. This approach enhances the accuracy and spatial coverage of heat flux estimates, which are essential for climate studies. The analysis reveals a significant long-term increase in latent heat flux (LHF) over the 25-year period, with a global average increase of about 9 W m⁻², representing a 10% increase in the mean value. The LHF trends are closely correlated with sea surface temperature (SST) trends, indicating that oceanic warming is driving increased latent heat loss. The study also highlights seasonal and interannual variability in LHF and sensible heat flux (SHF), with the largest seasonal variations occurring in the extratropical regions during fall and winter. The results show that the global oceanic latent heat loss has increased significantly, with the largest increases observed in the tropical Indian and western Pacific warm pools and along the boundaries of major ocean currents. The study also finds that the increase in LHF is influenced by changes in sea–air humidity difference (Δq) and wind speed (U), with Δq being a key factor linking SST and LHF. The analysis further indicates that the upward trend in U enhances the effect of Δq on LHF, contributing to the continued increase in latent heat loss. The study underscores the importance of accurate air–sea heat flux data for understanding climate variability and the role of the oceans in the coupled ocean–atmosphere system. The dataset provides valuable insights into the relationship between oceanic heat fluxes and atmospheric circulation, as well as the impact of global warming on oceanic and atmospheric processes. The findings suggest that the observed increase in LHF is consistent with the warming of the global oceans and highlights the need for continued monitoring and analysis of air–sea fluxes to better understand climate change.