Skeptical Technologist
All tweets are my own, or possibly my children's, or other family members, or even perhaps from someone halfway across the globe.
Deeper down the net effect is 90 degrees. Reminds me of the time I tried to ride a bicycle with backwards handlebars that turned left when you push right.
Eckman spirals are super cool to think about. When applied to evaluate the net direction of surface winds, you end up with total current motion shifted 45 degrees or so from the direction of the surface wind