Using 25 years of ERA5 reanalysis data, this study shows that wind divergence is partially driven by small‐scale sea surface temperature (SST) patterns via their effect on the boundary layer stability. Moreover, strong warm‐to‐cold fronts (the upper quartile) are associated with a mean increase of cloud cover of 10% ± 5% and a mean increase in the probability of a rain event of 15% ± 6%, with respect to the average values. The cloud and rainfall dependence on SST fronts is more pronounced in Fall, probably due to the stronger SST gradients present at the end of the summer season.
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Desbiolles et al. (2021) studied this question.
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