Air-sea exchange is important in constructing a budget of He in the upper oceanic water column. This exchange of He is controlled by the transfer velocity (KwHe) and the air-sea concentration gradient. Here, the global transfer velocity field of He is computed for January and July with user-defined derived fields based on control runs of the NCAR (National Center for Atmospheric Research) CCM1 (Community Climate Model), a 12 layer atmospheric general circulation model. The spatial resolution of these calculations is 4.5¿¿7.5¿ latitude-longitude. The range of KwHe variation over the globe is over an order of magnitude, varying from 5 to 75 cm hr-1. Equatorial values are generally 10--20 cm hr-1 and high latitude regions experience values in excess of 60 cm hr-1. The annual variability of the transfer velocity in the high-latitude northern hemisphere is larger than in the high-latitude southern hemisphere. This work shows that the spatial and temporal variation in the global transfer velocity field of He is significant. This result should be included in future high-resolution 3-dimensional coupled ocean-atmosphere tracer models when attempting to quantitatively deconvolute vertical transport and air-sea exchange in surface ocean He budgets. This approach may allow high-resolution global estimates of nitrate flux into the euphotic zone, an important component in oceanic biogeochemical modeling efforts. ¿ American Geophysical Union 1988 |