The Estimation Of The Terrestrial Carbon Budget In Guangdong Province And Discussion On The Mechanism Of Its Change

Because green-house gases such as CO₂ are released during the industry processing and their concentrations in atmosphere are increasing respectively, green-house effect and global warming becomes a real challenge for human being's sustainable development. Carbon cycle, as an important scientific method to explain greenhouse effect and to find the control means, has attracted much attention of the academic cycle in the world. Based on the former studies and applying improved indices, this paper estimated the net carbon storage and emission of Guangdong province during the period 1990-2004, as well as their variation tendency. Tn addition, the function of the carbon source & sink to its terrestrial ecosystem and the factors affected the variation of the carbon budget were discussed. At last, the corresponding control countermeasures were suggested in the end of the article.The results indicate that the net carbon storage in Guangdong province has been increased from 54093.6 thousand tons in 1990 to 68626.0 thousand tons in 2004 and the average annual growth rate is 1.71%, on the other hand, the total carbon emission has been increased from 80794.5 thousand tons in 1990 to 147125.0 thousand tons in 2004 and the average annual growth rate is 4.37%. The net carbon storage increased 26.87% while the total amount of carbon emission increased 82.10% during the investigated time-period. Up to 2004, the net carbon emission was much more than the net storage. The net carbon emission doubled during the investigated 14 years and its annual average growth rate is more than 8%. Although both the net carbon storage and the total carbon emission increased in Guangdong province during these years, the latter was much higher and was growing faster than the former.The lands for carbon storage in Guangdong province include all kinds of woodland, garden plot, meadow, cropland and peatland. The area of the carbon storage lands changed little, which only increased 24.84% from 1990 to 2004 and the annual average...