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陆地碳循环研究是全球变化研究的重要组成部分。土壤有机碳库作为陆地碳库的主要成分,在地球碳循环中扮演着重要角色。要精确估算土壤有机碳库的储量,就必须确定其组成及动态变化过程。这是我们对土壤碳循环的研究所面临的挑战。尤其在中国,全国性的土壤有机碳库广泛存在于何处尚未可知。本文是一个关于全国性土壤有机碳库储量估算研究项目的报告,数据来自中国第二次全国土壤普查中2473个土壤剖面的实测数据,并经过GIS技术确认。研究结果表明,中国土壤有机碳总储量约为92.4Pg(1Pg=10~(15)g),平均碳密度为10.53kgC/m~2,同时也分析了土壤有机碳的空间分布并将其绘制成图。本项研究提供了碳循环研究的一些基础数据和一个分析方法,同时为中国控制CO_2排放政策的制定提供了科学依据。
Terrestrial carbon cycle research is an important part of global change research. As the main component of terrestrial carbon pool, soil organic carbon pool plays an important role in the carbon cycle of the earth. To accurately estimate the reserves of soil organic carbon pool, we must determine its composition and dynamic changes. This is a challenge we face in the study of the soil carbon cycle. Especially in China, where the nationwide soil organic carbon pool exists extensively is unknown. This is a report on a national soil organic carbon stock reserve research project based on data from 2473 soil profiles collected from the Second National Soil Survey of China and confirmed by GIS. The results showed that the total organic carbon storage in China was about 92.4 Pg (1 Pg = 10 ~ (15) g) and the average carbon density was 10.53 kgC / m ~ 2. The spatial distribution of soil organic carbon was also analyzed and plotted Into the map. This study provides some basic data and an analytical method for carbon cycle research, and at the same time provides a scientific basis for the formulation of China’s policy of controlling CO 2 emissions.