[MUSIC] Another one of the factors that we are going to see, the barometric swamps. That will be associated... What is a barometric swamp? It is as simple as... I like that you see this, for those of us dedicated to meteorology, we have to learn to draw with what we call the isobaric pulse. A meteorologist always tries to draw lines that are of a single stroke and that we should be able to be accurate seems silly, to pinpoint the starting point. This is called isobaric pulse and we must have it especially when we do contour analysis. We have to do it decisively, with courage, draw the stroke of the line we are drawing. This is a barometric swamp. What does it mean? Well, if this were an anticyclone, in the northern hemisphere, it would rotate clockwise. That is why we have wind in the four cardinal points. But from here what wind does, in what direction does the wind blow in this zone? We do not know, because it could be west, east, north, south. This area where we do not have a clear direction of isobars this area is called barometric swamp. May correspond to a high pressure zone, but could also be a very large area in which there are no isobars for any reason. What effects will this have? The local weather phenomena that are going to be related to the sun, with the energy that comes from the sun. We will see in some cases the breezes, the mists, some of these local weather factors. They are very associated with the lack of dominant wind because we are in a zone of barometric swamp. We'll see it in some other lesson.