IMHE OpenIR  > 山地表生过程与生态调控重点实验室
Characteristics of annual greenhouse gas flux and NO release from alpine meadow and forest on the eastern Tibetan Plateau
Yao, Zhisheng1; Ma, Lei1; Zhang, Han1; Zheng, Xunhua1,2; Wang, Kai1; Zhu, Bo3; Wang, Rui1; Wang, Yanqiang3; Zhang, Wei1; Liu, Chunyan1; Butterbach-Bahl, Klaus1,4
Corresponding AuthorYao, Zhisheng(zhishengyao@mail.iap.ac.cn)
2019-07-15
Source PublicationAGRICULTURAL AND FOREST METEOROLOGY
ISSN0168-1923
Volume272Pages:166-175
AbstractThe importance of the world's largest plateau (i.e., the Tibetan Plateau) as a source/sink for atmospheric greenhouse gases (GHGs) still remains uncertain as field observations covering entire years and contrasting ecosystems are scarce. Here we report on year-round measurements of methane (CH4), nitrous oxide (N2O) and nitric oxide (NO) fluxes from two representative ecosystems (cattle-grazed meadow and natural forest, > 3300 m a.s.l) on the eastern Tibetan Plateau. In our study, the alpine soils generally functioned as sinks for atmospheric CH4. The pronounced seasonality of CH4 uptake, with higher uptake in the growing season and lower uptake in the non-growing season, was mainly regulated by the combined changes in soil moisture and temperature. Soil CH4 uptake was lower at the meadow site due to high soil moisture and grazing-induced soil compaction reducing gas diffusivity and hampering CH4 uptake. For the alpine meadow pulses of N-oxide fluxes were observed during the freeze-thaw period, while freeze-thaw related pulses did not occur at the forest site, where the seasonality of N-oxide fluxes was primarily regulated by changes in soil temperature (Q(10) = 3.0). Annual cumulative fluxes for the meadow and forest ecosystems ranged between -1.15 and -2.24 kg CH4-C ha(-1) yr(-1), 0.13-0.65 kg N2O-N ha(-1) yr(-1) and 0.022-0.047 kg NO-N ha(-1) yr(-1). Non-growing season fluxes contributed 34-45% and 21-51% to the annual budgets of CH4 and N-oxides, respectively. Multiple regression analyses showed that soil N-oxide fluxes were significantly positively correlated to concentrations of soil dissolved organic C (DOC) and inorganic N, with DOC and inorganic N concentrations being higher at the forest site. Our study also shows that alpine forest is a stronger source for non-CO2 GHGs relative to alpine meadow (higher by 195 kg CO2-eq ha(-1) yr(-1)). This difference in GHG fluxes significantly offsets the net climate benefits due to increased C-sequestration associated with afforestation/reforestation.
KeywordAlpine ecosystem Meadow Forest Non-CO2 greenhouse gas Nitric oxide
DOI10.1016/j.agrformet.2019.04.007
Indexed BySCI
WOS KeywordNITROUS-OXIDE FLUXES ; METHANE UPTAKE ; N2O EMISSIONS ; CH4 FLUXES ; LAND-USE ; NITRIC-OXIDE ; CARBON SEQUESTRATION ; SOIL RESPIRATION ; ECOSYSTEM ; CLIMATE
Language英语
Funding ProjectNational Key Research and Development Program of China[2016YFA0600804] ; National Key Research and Development Program of China[2012CB417100] ; National Natural Science Foundation of China[41675144] ; National Natural Science Foundation of China[41603075]
WOS Research AreaAgriculture ; Forestry ; Meteorology & Atmospheric Sciences
WOS SubjectAgronomy ; Forestry ; Meteorology & Atmospheric Sciences
WOS IDWOS:000469158400015
Funding OrganizationNational Key Research and Development Program of China ; National Natural Science Foundation of China
PublisherELSEVIER SCIENCE BV
Citation statistics
Document Type期刊论文
Identifierhttp://ir.imde.ac.cn/handle/131551/26222
Collection山地表生过程与生态调控重点实验室
Corresponding AuthorYao, Zhisheng
Affiliation1.Chinese Acad Sci, Inst Atmospher Phys, State Key Lab Atmospher Boundary Layer Phys & Atm, Beijing 100029, Peoples R China
2.Univ Chinese Acad Sci, Coll Earth Sci, Beijing 100049, Peoples R China
3.Chinese Acad Sci, Inst Mt Hazards & Environm, Key Lab Mt Environm Evolvement & Regulat, Chengdu 610041, Sichuan, Peoples R China
4.Karlsruhe Inst Technol, Atmospher Environm Res, Inst Meteorol & Climate Res, D-82467 Garmisch Partenkirchen, Germany
Recommended Citation
GB/T 7714
Yao, Zhisheng,Ma, Lei,Zhang, Han,et al. Characteristics of annual greenhouse gas flux and NO release from alpine meadow and forest on the eastern Tibetan Plateau[J]. AGRICULTURAL AND FOREST METEOROLOGY,2019,272:166-175.
APA Yao, Zhisheng.,Ma, Lei.,Zhang, Han.,Zheng, Xunhua.,Wang, Kai.,...&Butterbach-Bahl, Klaus.(2019).Characteristics of annual greenhouse gas flux and NO release from alpine meadow and forest on the eastern Tibetan Plateau.AGRICULTURAL AND FOREST METEOROLOGY,272,166-175.
MLA Yao, Zhisheng,et al."Characteristics of annual greenhouse gas flux and NO release from alpine meadow and forest on the eastern Tibetan Plateau".AGRICULTURAL AND FOREST METEOROLOGY 272(2019):166-175.
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