# Wind stress curl

From AMS Glossary

## wind stress curl

The vertical component of the (mathematical) curl of the surface wind stress ∂τ

_{y}/∂*x*- ∂τ_{x}/∂*y*(with*x*and*y*eastward and northward coordinates, and τ_{x}, τ_{y}the corresponding components of the surface stress). The large-scale, long-term averaged wind stress curl contains the principal information to calculate the wind-driven mass transport.