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  2. 成都山地灾害与环境研究所
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  4. 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

文献类型：期刊论文

作者Yao, Zhisheng1; Ma, Lei1; Zhang, Han1; Zheng, Xunhua1,2; Wang, Kai1; Zhu, Bo3; Wang, Rui1; Wang, Yanqiang3; Zhang, Wei1; Liu, Chunyan1
刊名AGRICULTURAL AND FOREST METEOROLOGY
出版日期2019-07-15
卷号272页码:166-175
ISSN号0168-1923
关键词Alpine ecosystem Meadow Forest Non-CO2 greenhouse gas Nitric oxide
DOI10.1016/j.agrformet.2019.04.007
通讯作者Yao, Zhisheng(zhishengyao@mail.iap.ac.cn)
英文摘要The 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.
WOS关键词NITROUS-OXIDE FLUXES ; METHANE UPTAKE ; N2O EMISSIONS ; CH4 FLUXES ; LAND-USE ; NITRIC-OXIDE ; CARBON SEQUESTRATION ; SOIL RESPIRATION ; ECOSYSTEM ; CLIMATE
资助项目National 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研究方向Agriculture ; Forestry ; Meteorology & Atmospheric Sciences
语种英语
出版者ELSEVIER SCIENCE BV
WOS记录号WOS:000469158400015
资助机构National Key Research and Development Program of China ; National Natural Science Foundation of China
源URL[http://ir.imde.ac.cn/handle/131551/26222]  
专题成都山地灾害与环境研究所_山地表生过程与生态调控重点实验室
中国科学院水利部成都山地灾害与环境研究所
通讯作者Yao, Zhisheng
作者单位1.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
推荐引用方式
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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来源：成都山地灾害与环境研究所

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