Wind erosion processes The three processes of wind erosion are surface creep, saltation and suspension.

The soil transported by wind to the different regions of the earth’s surface is known as loess. Sand dunes are formed as a result of deposition by wind. Dunes are common in all sandy regions, deserts and beaches. Sand dunes move gradually in the direction of prevailing winds.

As wind blows over the ground it picks up small particles of sediment in the process of deflation. The stronger the wind, the larger the particles it erodes. Wind causes erosion through ablation and abrasion.

Sediments are deposited to the ground when the wind slows down or encounters obstacles such as big rocks or grasses. Wind deposition results to sand dunes, which are usually seen in deserts and beaches, and loess deposits, which contains clay and silt particles.

Wind erosion is composed of: Abrasion – Very small particles of rocks are hit against the rock surfaces which lead to the formation of some characteristic features of desert like Zeugens, Rock pedestals and Yardangs. Deflation – The depressions are formed when wind blows away the wastes of rocks to distant areas.

Wind and Water Pollination

• No bright colors, special odors, or nectar.
• Small.
• Most have no petals.
• Stamens and stigmas exposed to air currents.
• Large amount of pollen.
• Pollen smooth, light, easily airborne.
• Stigma feathery to catch pollen from wind.
• May have staminate and pistillate flowers, may be monoecious or dioecious.

Wind is air in motion. It is produced by the uneven heating of the earth’s surface by the sun. Since the earth’s surface is made of various land and water formations, it absorbs the sun’s radiation unevenly. Two factors are necessary to specify wind: speed and direction.

A wind is always named according to the direction from which it blows. For example, a wind blowing from west to east is a west wind. The ultimate cause of Earth’s winds is solar energy. The greater the difference in pressure, the greater the force and the stronger the wind.

There is ongoing confusion many pilots have about weather briefings. There is not, in fact, such a thing as a “legal weather briefing.” ForeFlight delivers weather, NOTAMs, etc. that help a pilot meet this requirement – especially when obtaining a briefing from the file/brief system.

The chart is always read from left to right like a graph. The left side will show the flight levels from the surface to your highest planned altitude, plus at least 2000 thousands of feet. The bottom of the chart is divided into 15 sections. These sections do not correspond to waypoints on the flight plan.

ForeFlight Mobile features a full range of aviation weather products for comprehensive preflight planning. Access METARs and TAFs for airports, a rich library of static weather imagery, and an extensive collection of map weather overlays from radar to global icing and turbulence forecasts.

We received the FAA approval letter on Monday of this week. This means that Part 121 and 135 operators may now list ForeFlight as their approved QICP and as an official source for weather information.

On the Airports page and in the NavLog in the Flights tab where the wind Dir/Speed is given, winds aloft are displayed as true north. Elsewhere in the app, if you are viewing a calculated headwind, tailwind, or heading for a route, the winds aloft information will be determined for magnetic north.

MOS stands for Model Output Statistics. As the name suggests, MOS is derived from the output of weather prediction models developed and run by research meteorologists at NOAA.