China’s forest biomass carbon sink based on seven inventories from 1973 to 2008

Zhang, Chunhua; Ju, Weimin; Chen, Jing M.; Mei, Zan; Li, Dengqiu; Zhou, Yanlian; Xi-qun, Wang

doi:10.1007/s10584-012-0666-3

Cited by 69 publications

(77 citation statements)

References 19 publications

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“…And our estimate was significantly higher than that during 1981-2000 based on a variety of ways [25], and was also higher than the sink during 2001-2010 (0.28-0.33 PgC a -1 , Table 8) obtained from atmospheric inversion method [24,83], models [79] and resource inventory method [84,85]. These differences resulted primarily for two reasons.…”

Section: Uncertainty In the Assessment Of Carbon Sinkcontrasting

confidence: 56%

“…Hence, this GPP was chosen for our study. [84,85] a GPP and NEP of terrestrial ecosystems in China from MODIS and model tree ensemble approach were extracted from corresponding global database b Only data of GPP were reported. NPP were calculated based on NPP/GPP = 0.5 c Only data of NPP were reported.…”

Section: Uncertainty In the Assessment Of Carbon Sinkmentioning

confidence: 99%

“…GPP were calculated based on NPP/GPP = 0. [84]. By assuming no differences in the strength of carbon sink of forests' soil, grassland and cropland comparing with the level [85] at the end of last century, the national carbon sink was about 0.29 PgC a -1…”

Section: Uncertainty In the Assessment Of Carbon Sinkmentioning

confidence: 99%

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Primary estimation of Chinese terrestrial carbon sequestration during 2001–2010

et al. 2015

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Quantifying the carbon budgets of terrestrial ecosystems is the foundation on which to understand the role of these ecosystems as carbon sinks and to mitigate global climate change. Through a re-examination of the conceptual framework of ecosystem productivity and the integration of multi-source data, we assumed that the entire terrestrial ecosystems in China to be a large-scale regional biome-society system. We approximated the carbon fluxes of key natural and anthropogenic processes at a regional scale, including fluxes of emissions from reactive carbon and creature ingestion, and fluxes of emissions from anthropogenic and natural disturbances. The gross primary productivity, ecosystem respiration and net ecosystem productivity (NEP) in China were 7.78, 5.89 and 1.89 PgC a -1 , respectively, during the period from 2001 to 2010. After accounting for the consumption of reactive carbon and creature ingestion (0.078 PgC a -1 ), fires (0.002 PgC a -1 ), water erosion (0.038 PgC a -1 ) and agricultural and forestry utilization (0.806 PgC a -1 ), the final carbon sink in China was about 0.966 PgC a -1 ; this was considered as the climate-based potential terrestrial ecosystem carbon sink for the current climate conditions in China. The carbon emissions caused by anthropogenic disturbances accounted for more than 42 % of the NEP, which indicated that humans can play an important role in increasing terrestrial carbon sequestration and mitigating global climate change. This role can be fulfilled by reducing the carbon emissions caused by human activities and by prolonging the residence time of fixed organic carbon in the large-scale regional biome-society system through the improvement of ecosystem management.

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Section: Uncertainty In the Assessment Of Carbon Sinkcontrasting

confidence: 56%

Section: Uncertainty In the Assessment Of Carbon Sinkmentioning

confidence: 99%

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Primary estimation of Chinese terrestrial carbon sequestration during 2001–2010

et al. 2015

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“…The TRENDY simulations showed excellent agreement with inversion results for a slower rate of FFC CO 2 emission increase for both the interannual variations and sink magnitudes, except for magnitudes during 2010-2012. These CO 2 uptakes are also in good agreement with the average biomass carbon sink of 0.17 PgC year −1 during 1999-2008, estimated based on forest stands inventory in China (Zhang et al 2013), or the net carbon sink in the range of 0.19-0.26 PgC year −1 using inventory, biogeochemical models and inverse models (Piao et al 2009). …”

Section: Resultssupporting

confidence: 82%

Implications of overestimated anthropogenic CO2 emissions on East Asian and global land CO2 flux inversion

Saeki

Patra

2017

Geosci. Lett.

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Measurement and modelling of regional or country-level carbon dioxide (CO 2 ) fluxes are becoming critical for verification of the greenhouse gases emission control. One of the commonly adopted approaches is inverse modelling, where CO 2 fluxes (emission: positive flux, sink: negative flux) from the terrestrial ecosystems are estimated by combining atmospheric CO 2 measurements with atmospheric transport models. The inverse models assume anthropogenic emissions are known, and thus the uncertainties in the emissions introduce systematic bias in estimation of the terrestrial (residual) fluxes by inverse modelling. Here we show that the CO 2 sink increase, estimated by the inverse model, over East Asia (China, Japan, Korea and Mongolia), by about 0.26 PgC year . Independent results from methane (CH 4 ) inversion suggested about 41% lower rate of East Asian CH 4 emission increase during 2002-2012. We apply a scaling factor of 0.59, based on CH 4 inversion, to the rate of anthropogenic CO 2 emission increase since the anthropogenic emissions of both CO 2 and CH 4 increase linearly in the emission inventory. We find no systematic increase in land CO 2 uptake over East Asia during 1993-2010 or 2000-2009 when scaled anthropogenic CO 2 emissions are used, and that there is a need of higher emission increase rate for 2010-2012 compared to those calculated by the inventory methods. High bias in anthropogenic CO 2 emissions leads to stronger land sinks in global land-ocean flux partitioning in our inverse model. The corrected anthropogenic CO 2 emissions also produce measurable reductions in the rate of global land CO 2 sink increase post-2002, leading to a better agreement with the terrestrial biospheric model simulations that include CO 2 -fertilization and climate effects.

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“…地上碳储量和40%的地下碳储量, 在维持全球碳平衡减缓气候变化中发挥着重要作用, 因此, 森林碳固存已成为全球碳循环研究的热点 (Dixon et al, 1994;Houghton, 2005)。科学估测森林生态系统碳密度、碳储量及其变化特征是充分认识森林生态系统功能、评价区域森林碳汇潜力和应对气候变化的首要任务。近年来, 国内外学者采用多种研究手段, 针对不同目标, 从林分 (Ren et al, 2010;Zhang et al, 2013b)、区域 (Chen et al, 2009;Zhang et al, 2012)、国家 Zhang et al, 2013a …”

Section: 森林作为陆地生态系统的主体储存了80%的unclassified