1. Meteorological data collection

2. INDEX
Introduction
Difference between climate and atmospheric weather
Climatic elements:
Rainfall
Clouds
Atmospheric pressure
Humidity
Temperature
Wind

3. Introduction
Our project consists in the collection of meteorological data according to the instructions given to us by the protocols of GLOBE. These data are needed to determine whether climate changes are occurring globally. We have compared these data with those observed in other countries around the world, participating to the Globe project. 3

4. Difference between climate and
atmospheric weather
Climate is the average weather at a given location, observed for about years. Climate is mainly a function of the inclination of the sun’s rays on the Earth's surface, considered as a function of the latitude. It determines flora and fauna and influences the economic activities, the habits and culture of the people inhabiting the territory. 4

5. In meteorology, atmospheric weather is defined as the set of all weather phenomena that occur in the atmosphere at a given point in time. It is different from climate because the latter represents the average state of the atmosphere over a period of about thirty years. What characterizes the weather is called meteorological variability that can overlap the trend of natural climate in the medium - long term. 5

6. Climate’s elements

7. Rainfall
Rain is the most common type of atmospheric precipitation and it happens when separate drops of water fall from the clouds to the ground. The rain plays a very important role in the water cycle. Water evaporates from the oceans, condenses in the clouds and falls to the ground, then it returns to the ocean through groundwater and rivers, thus repeating the cycle. In this way water becomes available to the biosphere, allowing the development of flora and fauna and becoming available for human beings.

8. Our work
With a pluviometer we collected rain, measured the millimetres fall and reported these data in the protocols.

9. Our pluviometer
Diameter 14 cm
Height 36 cm
Diameter 16 cm

10. Clouds
Clouds are made by very little water particles, ice crystals or both of them. They are suspended in the athmosphere and they do not usually touch the ground.

11. Our work
Thanks to GLOBE’s guide we can say what type of clouds are in the sky in a specific moment of the day.

13. Atmospheric pressure
Atmospheric pressure is the pressure exerted by a column of air with the height of the Earth’s atmosphere on a surface of 1 cm2

14. We gauged atmospheric pressure with a barometer!
Our work!!
We gauged atmospheric pressure with a barometer!

15. Humidity
Atmosphere is composed by a mixture of gases, one of which is water vapour. Water vapour is added to atmosphere by evaporation and transpiration and it is removed when it condenses or when it freezes and crashes.
Relative humidity (RH) is the ratio between water vapour’s quantity in the atmosphere and the maximum possible one at the same temperature.
Absolute humidity is the water vapour’s quantity in the atmosphere.

16. To measure the relative humidity we used an hygrometer
Our work
To measure the relative humidity we used an hygrometer

17. Atmospheric temperature
Temperature is the physical quantity that indicates body or system’s thermal state.

18. To report temperature we used a digital thermometer
For maximum temperature
For minimum temperature
For actual temperature

19. Maxim temperature
Actual temperature
Minimum temperature
We report the 3 temperatures then we press the key “clear” every day to reset data just wrote.

20. Wind
Wind is an horizontal movement of air masses as a result of the vertical movements of atmospheric air masses.

21. Our work!!
To monitor the direction of the wind we used a little flag and a compass rose

23. Our Photos!

24. Our “little house”. Inside it there are our instrument!

25. We... We are watching the clouds...
We are wathing wind direction and then we write data on Globe’s scheemes.
Our pluviometer

26. The End
CLASSE 2° B ITC EINAUDI di PALMANOVA