In a 10° square test area of the North Atlantic the annual wind stress is estimated in 1° squares from volunteer ship reports. The curl of the wind stress is deduced therefrom and is shown significantly different from that recently published based on 5° square wind stress data of Hellerman. The coarse resolution of the latter underestimates maxima and minima in the curl by as much as 50%....
Saunders, Peter M.. 1976. "On the uncertainty of wind stress curl calculations." Journal of Marine Research 34, (2). https://elischolar.library.yale.edu/journal_of_marine_research/1353