Awos , History , Advantages and Disadvantages

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  • Topic: Meteorology, Weather forecasting, METAR
  • Pages : 17 (4251 words )
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  • Published : February 12, 2012
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AWOS is a real need and aid in aviation meteorology. Elaborate merits/demerits of AWOS with respect to weather reporting and measure to overcome limitations if any.

INTRODUCTION:

All living beings live in an environment surrounded by the atmosphere. So, all changes and phenomena occurred in the atmosphere and in the environment lived in affect all the livings very much, human being as well. To be able to minimize the negative effects of the phenomena occurred and to be able to use the results of those phenomena more beneficial for the human being, it is very important to observe the atmosphere and the environment. From the early stage of the history till date human being have been interested in the weather, and to predict its changes. The weather was so effective and important in their life that, in the most of the mythologies of several cultures, some of the weather events were believed to be done by a special god of each phenomenon. In other words, they gave the names of the weather phenomena to their gods. God of wind, god of rain, god of thunder, god of sun, god of storm were some of the gods believed as a result of the effectiveness of weather events. So, it has become more and more important for human being to observe the weather for both to be able to understand the messages of their gods and to be able to use those phenomena for their benefits more efficiently, i.e. to minimize the negative effects and to increase the positive effects. For example, some measures had to be taken against heavy rain and flood while the wind was used for windmill. Consequently, following essential parameters were started to be observed and to be evaluated by using very simple techniques and methods: Wind

Air temperature
Humidity
Precipitation
Air pressure
Sun
Visibility
Clouds

WHY TO OBSERVE WEATHER?

Entering into the 21st century, it is very obvious that there is a necessity for the provision of accurate and timely weather observations which will be the essential input of weather forecasts and numerical weather prediction models, research studies on climate and climate change, sustainable development, environment protection, renewable energy sources, etc. All outputs and products of any system are input dependant. So, accuracy, reliability and efficiency of the products of any meteorological study will depend on its input

3. WHO NEEDS OBSERVATIONS?

Based on the fact of importance of the observation mentioned above, following sectors and studies need and use the observed data: Weather forecasting
Research studies
Transportation
Aviation
Navigation
Agriculture
Tourism
Health
City planning
Construction
Justice
Security
Insurance
National Defense
Sports
Others

4. OBSERVING PARAMETERS

As a result of the developing technology, the methods and techniques of the observations have also been developed and the meteorological parameters to be observed have been increased significantly. Today, it has become possible to observe, to measure, to calculate, to record, to report, to transmit and to evaluate following meteorological parameters: Wind speed

Wind direction
Air temperature
Wet bulb temperature
Dew point temperature
Relative Humidity
Soil Terrestrial Temperature
Soil temperature at different depths
Soil moisture Pressure
Precipitation
Snow depth
Evaporation
Leaf wetness
Soil heat flux
Global radiation
Direct radiation
Diffuse radiation
Sunshine duration
Lightning
Cloud height
Visibility
Present weather

5. OBSERVING SYSTEMS

Observing systems may be classified in several ways due to the criteria of the classification. We can say that there are two main types of the observations:

Surface observations
Upper air observations

Surface observations which are our concern in that study can also be classified in general as follows: Conventional (un-automated) observing systems
Modern (automated) observing systems

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