Measurement and estimation of different environmental variables

1. Measurement and estimation of
different environmental variables

2. Thermometer placed in Stevenson screen

3. Thermocouples connected with data logger

4. Rain gauge

5. Rotating cup anemometer
Kestrel 2500 hand-held
weather meter

6. Sonic anemometer (for horizontal and vertical
wind speed)

7. Hygrometer

8. Lux meter
Light meter

9. A measure of the ability of the atmosphere to remove
water from the surface through the processes
of evaporation and transpiration assuming no control on
water supply.

11. Penman–Monteith equation (after Howard Penman and John
Monteith)
Predicts net evapotranspiration (ET), requiring as input daily mean
temperature, wind speed, relative humidity and solar radiation

12. A number representing net effect of evaporation,
transpiration, and precipitation in producing
cumulative moisture depletion in deep duff or
upper soil layers.

13. Pyranometer

14. Pyranometer

15. Campbell-Stoke Sunshine recorder

16. Accupar