Patent ID: 8082103

Claim:
An apparatus comprising: an observed CO 2 amount storage unit that stores an observed CO 2 amount that is an amount of CO 2 that is observed in an observation region; a plant-chlorophyll distribution information storage unit that stores plant-chlorophyll distribution information on distribution of plant-chlorophyll in the observation region; a solar radiation amount storage unit that stores an amount of solar radiation in the observation region; an absorbed CO 2 amount calculating unit that calculates an absorbed CO 2 amount that is an amount of CO 2 that is absorbed by the plant-chlorophyll on the basis of the plant-chlorophyll distribution information and the amount of solar radiation; a total CO 2 amount calculating unit that calculates a total CO 2 amount by adding up the observed CO 2 amount and the absorbed CO 2 amount; an average solar radiation amount storage unit that stores an average solar radiation amount in the observation region; an average absorbed CO 2 amount calculating unit that calculates an average absorbed CO 2 amount that is an average amount of CO 2 that is absorbed by plant-chlorophyll when a solar radiation amount is the average solar radiation amount; and a corrected CO 2 amount calculating unit that calculates a corrected CO 2 amount by subtracting the average absorbed CO 2 amount from the total CO 2 amount.