Methane uptake in global forest and grassland soils from 1981 to 2010

•Empirical models were developed to estimate CH4 uptake by forest and grassland soils.•Global CH4 uptake averaged 9.16Tg/year and 3.73Tg/year in forest and grassland soils during 1981–2010.•CH4 uptake in global forest and grassland soils increased slightly over the thirty years. [Display omitted] Me...

Celý popis

Uloženo v:
Podrobná bibliografie
Vydáno v:The Science of the total environment Ročník 607-608; s. 1163 - 1172
Hlavní autoři: Yu, Lijun, Huang, Yao, Zhang, Wen, Li, Tingting, Sun, Wenjuan
Médium: Journal Article
Jazyk:angličtina
Vydáno: Netherlands Elsevier B.V 31.12.2017
Témata:
CH4 uptake
climate change
Climate zone
ecosystems
Forest soils
Global
Grassland soils
grasslands
greenhouse gases
methane
temperature
tropical forests
CH4 uptake
Climate zone
Global
Grassland soils
Forest soils
CH uptake
ISSN:0048-9697, 1879-1026, 1879-1026
On-line přístup:Získat plný text
Tagy: Přidat tag
Žádné tagy, Buďte první, kdo vytvoří štítek k tomuto záznamu!
Popis
Shrnutí:•Empirical models were developed to estimate CH4 uptake by forest and grassland soils.•Global CH4 uptake averaged 9.16Tg/year and 3.73Tg/year in forest and grassland soils during 1981–2010.•CH4 uptake in global forest and grassland soils increased slightly over the thirty years. [Display omitted] Methane (CH4) is one of the most potent greenhouse gases. Although forest and grassland soils generally consume atmospheric CH4, the quantities and spatiotemporal changes in CH4 uptake remain largely uncertain for these ecosystems at the global scale. In this study, we developed an empirical model to estimate the CH4 uptake in global forest and grassland soils during the period 1981–2010. We estimated that the mean values of CH4 uptake were 9.16 (± 3.84) Tg yr−1 in forest soils and 3.73 (± 1.41) Tg yr−1 in grassland soils during the study period. Tropical forest and grassland soils were determined to be the largest CH4 sink, contributing 58% to the global total. During the 30-year period, the CH4 uptake in cool temperate dry and warm temperate dry soils and in polar/boreal grassland soils increased significantly (P<0.05) at rates of 0.30–2.95Ggyr−1 owing mainly to increases in mean temperatures. However, the uptake decreased significantly (P<0.01) in tropical dry grassland soils, at 1.22Ggyr−1, owing mainly to increases in precipitation. Ultimately, our simulation indicated that the global CH4 uptake by forest and grassland soils increased significantly (P<0.05) at rates of 4.67Ggyr−1 and 2.98Ggyr−1, respectively, during the period 1981–2010. The trend of increasing sinks from forest and grassland and its relationship with temperature and precipitation variability imply that forest and grassland CH4 sinks will play a positive role in climate change mitigation in the future.
Bibliografie:ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
ISSN:0048-9697
1879-1026
1879-1026
DOI:10.1016/j.scitotenv.2017.07.082