Advice 1: How to determine the wind rose

It is believed that the rose of the winds was invented by sailors who needed to know the particular weather conditions for navigation. This information helped to understand when it is better to start swimming, to the wind was favorable. The diagram in the form of a rose and is now used in the design and construction.
How to determine the wind rose
You will need
  • Observations about wind direction in the studied period of time, paper, pencil, ruler, eraser.
Instruction
1
Draw two axes. Meteorologists keep records for 8 or 16 rhumbs. Depending on how detailed were the observations for wind direction, draw two, or six axes. If you were using 8 compass points (North, northeast, East, Southeast, South, southwest, West, Northwest), add two axes at an angle of 45 degrees to the first two.
2
Construct the bisectors to the angles of 45 degrees, when observations were conducted for 16 rhumbs. That is, if are taken into account and a more accurate direction (North-northeast, East-northeast, South-southwest, etc.), there should be two more lines.
3
Put all the already constructed 8-axis equal segments and connect them with lines. Find the middle of each of them through this point and the center of the picture draw a straight line. Turned four axes. Erase the auxiliary lines.
4
Analyze observational data. Count the number of days the wind was blowing in each direction. It is possible that in this area the air masses come only with the sample of cardinal. This means that the rose of the winds is clearly expressed.
5
Put on the drawn coordinate axes the results of your calculations in scale. As a rule, rose of the winds is drawn for a certain period of time: month, quarter, year. The longer the time interval, the smaller must be the scale. For example, if you build a chart for the month, then the unit can be accepted by the cell in 5 mm.
6
If you do a annual schedule, a single day can mean one millimeter. Take another scale that fits your needs. Measure on each axis is the number of measurement units how many days the wind was blowing in this direction.
7
Connect the marked points with lines. The resulting figure is the rose of the winds for a given location over a selected period of time. Light side, where stands the largest segment, characterizes the predominant direction of air masses.

Advice 2: How to draw a wind rose

Rose of the winds is a circular vector diagram that shows the frequency of occurrence of wind in different directions for a certain period of time. Built rose of the winds are usually on the average long-term data for year, season, month.
How to draw a wind rose
You will need
  • - a sheet of paper;
  • pencil or pen;
  • - calendar weather.
Instruction
1
In order to draw the rose of the winds, you will need the data of daily wind direction for some time. For example, you can observe the weather for one month, recording daily information about wind direction in the weather Calendar".
2
Draw on a sheet of paper intersecting lines (according to the principle coordinate system), which will specify the principal directions, otherwise they are called Rumba horizon (North–South, West–East). Then swipe through the center of the two lines (North-West, South-West, North-East, South-East). All you should have eight directions (compass points). Sign their names on your drawing (S; u; W; V; s-Z; s-V; SW; se ).
3
Using data from "Calendar, weather", in each direction from the center in the direction where the wind blows, check the scale of the number of days during which the prevailing wind is a certain direction. You can choose any convenient scale, e.g. 1 day to take 0.5 cm If, for example, wind South-West blew in a month 5 days it is required from the centre of the graph by a line, which is oriented to the South-West, to defer 2.5 cm and make a mark.
4
In the same way mark winds on each of the eight directions.
5
Of the mark consistently connect straight lines. In the center of a rose of winds near or specify the number of days with calm weather.
6
Ray rose of the winds you can make a conclusion about the prevailing winds in your area during the month.
Note
Wind direction is the direction (point) of the horizon, where the wind blows. Accordingly, the South wind always blows to the North, West to East, South-West to North-East, etc. In meteorology, wind direction is determined by 8 or 16 rhumbs.
Useful advice
The first written mention of the rose of the winds belong to the TWELFTH century.

Graphs of the wind rose in mandatory are made when designing construction projects to account for the effects of the prevailing winds in a particular region in the construction of housing, objects socially-cultural appointment and industry.
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