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MODIS Based Estimation of Forest Aboveground Biomass in China.

Yin G, Zhang Y, Sun Y, Wang T, Zeng Z, Piao S - PLoS ONE (2015)

Bottom Line: The mean forest aboveground biomass density is 56.1 Mg C ha-1, with high values observed in temperate humid regions.The responses of forest aboveground biomass density to mean annual temperature are closely tied to water conditions; that is, negative responses dominate regions with mean annual precipitation less than 1300 mm y-1 and positive responses prevail in regions with mean annual precipitation higher than 2800 mm y-1.During the 2000s, the forests in China sequestered C by 61.9 Tg C y-1, and this C sink is mainly distributed in north China and may be attributed to warming climate, rising CO2 concentration, N deposition, and growth of young forests.

View Article: PubMed Central - PubMed

Affiliation: College of Urban and Environmental Sciences, Peking University, Beijing, China.

ABSTRACT
Accurate estimation of forest biomass C stock is essential to understand carbon cycles. However, current estimates of Chinese forest biomass are mostly based on inventory-based timber volumes and empirical conversion factors at the provincial scale, which could introduce large uncertainties in forest biomass estimation. Here we provide a data-driven estimate of Chinese forest aboveground biomass from 2001 to 2013 at a spatial resolution of 1 km by integrating a recently reviewed plot-level ground-measured forest aboveground biomass database with geospatial information from 1-km Moderate-Resolution Imaging Spectroradiometer (MODIS) dataset in a machine learning algorithm (the model tree ensemble, MTE). We show that Chinese forest aboveground biomass is 8.56 Pg C, which is mainly contributed by evergreen needle-leaf forests and deciduous broadleaf forests. The mean forest aboveground biomass density is 56.1 Mg C ha-1, with high values observed in temperate humid regions. The responses of forest aboveground biomass density to mean annual temperature are closely tied to water conditions; that is, negative responses dominate regions with mean annual precipitation less than 1300 mm y-1 and positive responses prevail in regions with mean annual precipitation higher than 2800 mm y-1. During the 2000s, the forests in China sequestered C by 61.9 Tg C y-1, and this C sink is mainly distributed in north China and may be attributed to warming climate, rising CO2 concentration, N deposition, and growth of young forests.

No MeSH data available.


Related in: MedlinePlus

Spatial distribution of mean forest AGBD during 2001–2013.
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pone.0130143.g003: Spatial distribution of mean forest AGBD during 2001–2013.

Mentions: Fig 3 illustrates the spatial distribution of forest AGBD across China, indicating a strong spatial heterogeneity. More than half of Chinese forest AGBD falls in a range of 40–70 Mg C ha-1. The highest AGBD was found in tropical rainforests in southeastern Tibet with values higher than 100 Mg C ha-1. Besides southeastern Tibet, central areas of Mts. Daxinganling, Mts. Xiaoxinganling and Mts. Changbai in Northeast China also show a relatively high AGBD, with values ranging from 60 to 80 Mg C ha-1. However, the edge regions of these mountains display a relatively low AGBD (< 40 Mg C ha-1). The relatively low AGBD can also be found in South China, Xinjiang and central Inner Mongolia.


MODIS Based Estimation of Forest Aboveground Biomass in China.

Yin G, Zhang Y, Sun Y, Wang T, Zeng Z, Piao S - PLoS ONE (2015)

Spatial distribution of mean forest AGBD during 2001–2013.
© Copyright Policy
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4482713&req=5

pone.0130143.g003: Spatial distribution of mean forest AGBD during 2001–2013.
Mentions: Fig 3 illustrates the spatial distribution of forest AGBD across China, indicating a strong spatial heterogeneity. More than half of Chinese forest AGBD falls in a range of 40–70 Mg C ha-1. The highest AGBD was found in tropical rainforests in southeastern Tibet with values higher than 100 Mg C ha-1. Besides southeastern Tibet, central areas of Mts. Daxinganling, Mts. Xiaoxinganling and Mts. Changbai in Northeast China also show a relatively high AGBD, with values ranging from 60 to 80 Mg C ha-1. However, the edge regions of these mountains display a relatively low AGBD (< 40 Mg C ha-1). The relatively low AGBD can also be found in South China, Xinjiang and central Inner Mongolia.

Bottom Line: The mean forest aboveground biomass density is 56.1 Mg C ha-1, with high values observed in temperate humid regions.The responses of forest aboveground biomass density to mean annual temperature are closely tied to water conditions; that is, negative responses dominate regions with mean annual precipitation less than 1300 mm y-1 and positive responses prevail in regions with mean annual precipitation higher than 2800 mm y-1.During the 2000s, the forests in China sequestered C by 61.9 Tg C y-1, and this C sink is mainly distributed in north China and may be attributed to warming climate, rising CO2 concentration, N deposition, and growth of young forests.

View Article: PubMed Central - PubMed

Affiliation: College of Urban and Environmental Sciences, Peking University, Beijing, China.

ABSTRACT
Accurate estimation of forest biomass C stock is essential to understand carbon cycles. However, current estimates of Chinese forest biomass are mostly based on inventory-based timber volumes and empirical conversion factors at the provincial scale, which could introduce large uncertainties in forest biomass estimation. Here we provide a data-driven estimate of Chinese forest aboveground biomass from 2001 to 2013 at a spatial resolution of 1 km by integrating a recently reviewed plot-level ground-measured forest aboveground biomass database with geospatial information from 1-km Moderate-Resolution Imaging Spectroradiometer (MODIS) dataset in a machine learning algorithm (the model tree ensemble, MTE). We show that Chinese forest aboveground biomass is 8.56 Pg C, which is mainly contributed by evergreen needle-leaf forests and deciduous broadleaf forests. The mean forest aboveground biomass density is 56.1 Mg C ha-1, with high values observed in temperate humid regions. The responses of forest aboveground biomass density to mean annual temperature are closely tied to water conditions; that is, negative responses dominate regions with mean annual precipitation less than 1300 mm y-1 and positive responses prevail in regions with mean annual precipitation higher than 2800 mm y-1. During the 2000s, the forests in China sequestered C by 61.9 Tg C y-1, and this C sink is mainly distributed in north China and may be attributed to warming climate, rising CO2 concentration, N deposition, and growth of young forests.

No MeSH data available.


Related in: MedlinePlus