ABSTRACT
Fig 5. Isopleths of 137Cs and salinity for transect A across the North Channel
resultant water mixing are strongly dependent on wind speed and direction and it has indeed been shown that this applies to the North Channel (22). Wind speed and direction are relatively constant in this region at all times of year, exceptions being during March and May when the prevailing wind is from the north-east rather than the south-west. It thus seems highly likely that the observed broadening and increased lateral homogeneity of the 13bs plume during the month of May is a reuslt of this change in local wind conditions.
