A shallow marine inversion kept polluted air trapped in the L.A. Basin for days. (Paul Duginski / Los Angeles Times) One good thing about Santa Ana winds: They really clear the air. During the first ...

Figure 2: Mechanisms of primary and secondary inversion. The more distal position and symmetric shape of the associated shallow, marginal troughs show that the Palaeocene inversion phase was more ...

Drive up to Bogus Basin right now and look out over the Treasure Valley; you’ll see a haze hanging over Boise and its surrounding cities. But for those below the haze … the view is not so interesting.