Estimate of Air-sea Fluxes During South China Sea Monsoon Experiment in 1998

Based on the data of the South China Monsoon Experiment in 1998, the air-sea fluxes are estimated by using the bulk coefficient and multi-stratification formulas. The results of latent and the sensible heat fluxes by two methods are basically close. The latent heat flux is 1–3 W·m^-2 larger and the sensible heat flux 0–1.5 W·m^-2 smaller by the multi-stratification method than by the bulk coefficient method. Generally the latent heat flux increases gradually during the monsoon onset. The flux at night is larger before the monsoon onset than after. During the days, the flux is smaller in the beginning and middle of the monsoon onset period than the latter period. The sensible heat flux transports from the sea surface to atmosphere in the beginning of the monsoon onset and from the atmosphere to sea surface in the latter period of the monsoon onset. The momentum flux and friction velocity increase with speed.