A Comprehensive Analysis of Difference in Carbon Stock Estimation in the Grasslands of China

doi:10.11733/j.issn.1007-0435.2017.05.001

Acta Agrestia Sinica ›› 2017, Vol. 25 ›› Issue (5): 905-913.DOI: 10.11733/j.issn.1007-0435.2017.05.001

A Comprehensive Analysis of Difference in Carbon Stock Estimation in the Grasslands of China

WANG Sui-zi^1,2, FAN Jiang-wen¹, LIU Shuai³

1. Key Laboratory of Land Surface Pattern and Simulation, Institute of Geographical Sciences and Natural Resources Research, CAS, Beijing 100101, China;
2. University of Chinese Academy of Sciences, Beijing 100049, China;
3. Grassland Monitoring and Supervision Center, Ministry of Agriculture, Beijing 100125, China

Received:2017-03-15 Revised:2017-09-06 Online:2017-10-15 Published:2018-01-25

中国草地碳库估算差异性综合分析

王穗子^1,2, 樊江文¹, 刘帅³

1. 中国科学院地理科学与资源研究所陆地表层格局与模拟院重点实验室, 北京 100101;
2. 中国科学院大学, 北京 100049;
3. 农业部草原监理中心, 北京 100125

通讯作者: 樊江文,E-mail:fanjw@igsnrr.ac.cn
作者简介:王穗子(1990-),女,博士研究生,主要从事草地生态学研究,E-mail:wsz_3225@163.com
基金资助:
草原碳汇和碳排放权交易（Y6L60170AJ）；南方草地固碳现状速率（Y3L30240AJ）资助

Abstract

Abstract:

As one of the most widespread vegetation types in the world, grassland ecosystem plays an important role in the global carbon cycle. China has very abundant resource of meadows and profound carbon sink. Grassland ecosystem holds a central position in the process of carbon cycling in terrestrial ecosystems in China, and even in global. The estimated carbon stock was different in the studies due to the differences in estimation methods and data resources. This study makes a synthetic analysis on carbon stock in grassland ecosystem of China by literatures. Our estimate indicated that the estimation of total carbon storage in grassland in China was very different. In China, the grassland carbon reserves are mainly distributed in alpine and temperate regions. The average area of grassland varied largely from different data resources, the maximum and minimum average areas came from the data of grassland inventory and remote sensing, respectively. Below-ground biomass estimates are also different due to different Root-shoot ratio data. The carbon storage was also different depending on estimation methods. The maximum and minimum value was estimated by average carbon density in global and models, respectively. Using a comprehensive analysis, the valuation of total carbon storage in the grassland of China was 41.67 PgC, which has great potential for carbon sequestration.

Key words: Grassland ecosystem, Carbon storage, Carbon sink, Difference, Distribution pattern

摘要：

我国草地资源丰富，固碳量大，具有深厚的碳汇潜力。本文综合分析已发表的中国草地碳库相关研究结果，以期阐述中国草地碳库的情况及其分布格局，探究草地碳储量估算中不确定性因素导致的差异性。结果表明：中国草地碳储量估算结果差异较大，接近4倍；中国草地有机碳主要分布于高寒和温带地区；采用不同资料数据来源估算出的草地面积不同，利用草场普查资料估算的草地面积均值最大，卫星遥感数据估算出的最小；不同估算方法也导致碳库估算结果存在差异，全球平均碳密度法的草地碳储量平均估值最大，模型估算法最小；根冠比范围差距由0.38到52.30导致草地地下生物量碳储量估算差异较大。经综合分析，中国草地碳储量为41.67 PgC，具有较大的碳汇潜力。

关键词: 草地生态系统, 碳库, 碳汇, 差异性, 分布格局

CLC Number:

S153.61

WANG Sui-zi, FAN Jiang-wen, LIU Shuai. A Comprehensive Analysis of Difference in Carbon Stock Estimation in the Grasslands of China[J]. Acta Agrestia Sinica, 2017, 25(5): 905-913.

王穗子, 樊江文, 刘帅. 中国草地碳库估算差异性综合分析[J]. 草地学报, 2017, 25(5): 905-913.

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A Comprehensive Analysis of Difference in Carbon Stock Estimation in the Grasslands of China

中国草地碳库估算差异性综合分析

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