gchange  > 影响、适应和脆弱性
DOI: 10.1111/gcb.12998
Title:
The greenhouse gas balance of European grasslands
Author: Chang J.; Ciais P.; Viovy N.; Vuichard N.; Sultan B.; Soussana J.-F.
Source Publication: Global Change Biology
ISSN: 13541013
Indexed By: SCI ; SCI-E
Publishing Year: 2015
Volume: 21, Issue:10
pages begin: 3748
pages end: 3761
Language: 英语
Keyword: European grassland ; Grassland management ; Greenhouse gases balance ; Livestock ; ORCHIDEE
Scopus Keyword: biogeochemistry ; carbon balance ; carbon dioxide ; grassland ; greenhouse gas ; livestock ; management practice ; methane ; net ecosystem exchange ; nitrogen oxides ; Norway ; Switzerland ; Animalia ; gas ; air pollution ; analysis ; biological model ; carbon cycle ; chemical model ; environmental protection ; Europe ; gas ; grassland ; greenhouse effect ; season ; Air Pollution ; Carbon Cycle ; Conservation of Natural Resources ; Europe ; Gases ; Grassland ; Greenhouse Effect ; Models, Biological ; Models, Chemical ; Seasons
Subject in Chinese: 土壤 ; ; ; 排放物 ; 氮氧化物 ; 草原 ; 保护 ; 二氧化碳 ; 甲烷
Subject: SOILS ; CARBON ; NITROGEN ; EMISSIONS ; NITROGEN OXIDES ; GRASSLANDS ; CONSERVATION ; CARBON DIOXIDE ; METHANE
English Abstract: The greenhouse gas (GHG) balance of European grasslands (EU-28 plus Norway and Switzerland), including CO2, CH4 and N2O, is estimated using the new process-based biogeochemical model ORCHIDEE-GM over the period 1961-2010. The model includes the following: (1) a mechanistic representation of the spatial distribution of management practice; (2) management intensity, going from intensively to extensively managed; (3) gridded simulation of the carbon balance at ecosystem and farm scale; and (4) gridded simulation of N2O and CH4 emissions by fertilized grassland soils and livestock. The external drivers of the model are changing animal numbers, nitrogen fertilization and deposition, land-use change, and variable CO2 and climate. The carbon balance of European grassland (NBP) is estimated to be a net sink of 15 ± 7 g C m-2 year-1 during 1961-2010, equivalent to a 50-year continental cumulative soil carbon sequestration of 1.0 ± 0.4 Pg C. At the farm scale, which includes both ecosystem CO2 fluxes and CO2 emissions from the digestion of harvested forage, the net C balance is roughly halved, down to a small sink, or nearly neutral flux of 8 g C m-2 year-1. Adding CH4 and N2O emissions to net ecosystem exchange to define the ecosystem-scale GHG balance, we found that grasslands remain a net GHG sink of 19 ± 10 g C-CO2 equiv. m-2 year-1, because the CO2 sink offsets N2O and grazing animal CH4 emissions. However, when considering the farm scale, the GHG balance (NGB) becomes a net GHG source of -50 g C-CO2 equiv. m-2 year-1. ORCHIDEE-GM simulated an increase in European grassland NBP during the last five decades. This enhanced NBP reflects the combination of a positive trend of net primary production due to CO2, climate and nitrogen fertilization and the diminishing requirement for grass forage due to the Europe-wide reduction in livestock numbers. © 2015 John Wiley & Sons Ltd.
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被引频次[WOS]:25   [查看WOS记录]     [查看WOS中相关记录]
Document Type: 期刊论文
Identifier: http://119.78.100.177/globalchange/handle/2HF3EXSE/61907
Appears in Collections:影响、适应和脆弱性

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Affiliation: Laboratoire des Sciences du Climat et de l'Environnement, UMR8212, CEA-CNRS-UVSQ, Gif-sur-Yvette, France; Sorbonne Universités (UPMC Univ Paris 06), CNRS-IRD-MNHN, LOCEAN/IPSL, 4 place Jussieu, Paris, France; INRA, Grassland Ecosystem Research Unit, UREP, Clermont-Ferrand, France

Recommended Citation:
Chang J.,Ciais P.,Viovy N.,et al. The greenhouse gas balance of European grasslands[J]. Global Change Biology,2015-01-01,21(10)
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