Afforestation increases ecosystem productivity and carbon storage in China during the 2000s

文献类型： 外文期刊

第一作者： Yue, Xu

作者： Yue, Xu;Zhang, Tianyi;Shao, Changliang;Shao, Changliang

作者机构：

关键词： gross primary productivity; land cover change; CO2 fertilization; land carbon storage; trend; afforestation

期刊名称：AGRICULTURAL AND FOREST METEOROLOGY （ 影响因子：5.734； 五年影响因子：5.964 ）

ISSN： 0168-1923

年卷期： 2021 年 296 卷

页码：

收录情况： SCI

摘要： China is experiencing fast afforestation and sensible climate change in recent decades. However, their impacts on regional carbon cycle remain unclear. Here, we explore the effects of climate and land cover change (LCC) on ecosystem productivity and carbon storage in China during 2001-2012 by forcing a dynamic vegetation model with satellite-based land cover and two different climate datasets. The model predicts a significant increase of 0.065 m(2) m(-2) decade(-1) in annual mean leaf area index, higher than the observed trend of 0.038 m(2) m(-2) decade(-1). Meanwhile, national annual total gross primary productivity increases by 0.041 +/- 0.007 Pg C yr(-2), which is contributed by CO2 fertilization (0.035 +/- 0.001 Pg C yr(-2)), LCC (0.036 +/- 0.001 Pg C yr(-2)), and climate change (-0.032 +/- 0.01 Pg C yr(-2)). Consequently, the total land carbon storage in China increases by 0.99 Pg C yr(-1), to which the LCC alone contributes 0.77 Pg C yr(-2). The maximum enhancement of >1 g C m(-2) yr(-1) in land carbon stock is found over the central west, where a large fraction of shrublands is converted to forests. Our results suggest that afforestation in China provides a strong mitigation to the regional carbon emissions during the 2000s.

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