The earth’s prevailing winds are the result of two major factors: differential heating and the earth’s rotation. What region of Earth receives direct sunlight? All six wind patterns travel north in the northern summer, and south in the northern winter. At the poles, the cooler air sinks and moves back toward the equator. When cooling air sinks, the air flows steadily back down the equator. The Global winds patterns movement is also called the general circulation of the atmosphere. All these scales are often superimposed on top of each other. Describe the air in the equator? Global Winds Patterns. Each belt occupies about 30 degrees of latitude, that is, one third of the way from the pole to the equator. From pole to equator, they are the polar easterlies, the westerlies, and the trade winds. This figure shows all six cells diagrammatically, along with the pressure variations at the surface of the Earth and zones of typical wet and dry belts. Global Wind Patterns. The. Global Wind Patterns. climate, ocean circulation, etc.) However, global winds push air masses around Earth and bring changes in the weather. These winds are favored by sailors because of their warmth and steady stream. died out. Global Wind Patterns Winds on Earth are either global or local. Let's turn now to actual global surface wind and pressure patterns, shown in Figure 5.17. Wind drags on the ocean surface, causing water to move in the direction the wind … In area near the equator, the sun is almost directly overhead for most of the year. The trade winds are located from 30 degrees latitude, north and south, to the equator. Warm air rises at the equator and moves toward the poles. In the northern hemisphere, they include two large high-pressure cells that flank North America—the Hawaiian and Azores highs. However, it is not this simple. The subtropical high-pressure belts, created by the Hadley cell circulation, are important features. _ _ 2. Wind is mainly the outcome of a thermodynamic principle and of the Coriolis effect due to the counterclockwise rotation of the earth. Start studying Global Wind Patterns. Warm air around the equator is lifted, which creates a suction effect for air masses coming from higher (or lower) latitudes. A three-cell model of global circulation is a starting point for understanding the prevailing winds, but keep in mind that seasonal changes and landmasses have a major effect on these patterns. Global winds blow in the same directions all the time and are related to the unequal heating of Earth by the Sun — that is, more solar radiation strikes the equator than the polar regions –- and the rotation of the Earth — that is, the Coriolis effect . Three forces cause the circulation of a gyre: global wind patterns, Earth’s rotation, and Earth’s landmasses. For instance, in the United States, global winds called the prevailing westerlies to push air masses from west to east. Unequal heating of the Earth’s surface also forms large global wind patterns. Global wind patterns: Winds are named by the direction from which they blow. Global winds are composed of three different wind patterns: trade winds, polar easterlies and westerlies. Clarifying Questions: 1. View Global Wind Patterns.docx from COMPUTER 123 at Appalachian State University. The globe is encircled by six major wind belts, three in each hemisphere. However, because there are higher temperature differences and more landmass in the northern hemisphere, the regions located north of the Equator observe more extreme wind currents and weather events than the southern hemisphere. Describe how the trade winds, westerlies, and easterlies are influenced by the Coriolis effect; Wind patterns exist at many different scales of motion, from the largest patterns over the whole globe, to winds associated with lows and fronts, to small turbulent eddies. latent heat are stored in the vapor. Learn vocabulary, terms, and more with flashcards, games, and other study tools.
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