Fig.3. (A) Annual carbon sequestration (Kg/m2) in Isfahan city based on the GWR model; (B )Zooming in on the picture(A): Annual carbon sequestration (Kg/m2) in green space around Zayandeh-rood river
To determine the spatial distribution of annual CO2absorption, the calculated value for carbon sequestration is multiplied by a coefficient of 3.67(refer to photosynthesis equation). Since based on the photosynthesis equation, for every unit of carbon storage, 3.67 units of carbon dioxide are absorbed by the tree. The maps obtained from the GWR model for CO2 absorption are shown in Fig 4.