Northern Hemisphere portrays the upper air westerlies having troughs as well as ridges. The upper air westerlies depicts clockwise curvature in elevation. On a weather map of the Northern Hemisphere, one can see the westerlies among the subtropical highs and subpolar lows.
Starts September 22,
ends December 20 this year of 2016!
C petroleum because i been learned about this
The answer could be erosion from earthquakes and stuff
