IMHE OpenIR  > 山地表生过程与生态调控重点实验室
Effects of warming and nitrogen fertilization on GHG flux in the permafrost region of an alpine meadow
Chen, Xiaopeng1,2; Wang, Genxu1; Zhang, Tao1,2; Mao, Tianxu1,2; Wei, Da1; Hu, Zhaoyong1; Song, Chunlin1,2
Corresponding AuthorGenxu Wang
2017
Source PublicationATMOSPHERIC ENVIRONMENT
ISSN1352-2310
EISSN1873-2844
Volume157Pages:111-124
SubtypeArticle
Abstract

The limited number of in situ measurements of greenhouse gas (GHG) flux during soil freeze-thaw cycles in permafrost regions limits our ability to accurately predict how the alpine ecosystem carbon sink or source function will vary under future warming and increased nitrogen (N) deposition. An alpine meadow in the permafrost region of the Qinghai-Tibet Plateau was selected, and a simulated warming with N fertilization experiment was carried out to investigate the key GHG fluxes (ecosystem respiration [Re], CH4 and N2O) in the early (EG), mid (MG) and late (LG) growing seasons. The results showed that: (i) warming (4.5 degrees C) increased the average seasonal Re, CH4 uptake and N2O emission by 73.5%, 65.9% and 431.6%, respectively. N fertilization (4 g N m(-2)) alone had no significant effect on GHG flux; the interaction of warming and N fertilization enhanced CH4 uptake by 10.3% and N2O emissions by 27.2% than warming, while there was no significant effect on the Re; (ii) the average seasonal fluxes of Re, CH4 and N2O were MG > LG > EG, and Re and CH4 uptake were most sensitive to the soil freezing process instead of soil thawing process; (iii) surface soil temperature was the main driving factor of the Re and CH4 fluxes, and the N2O flux was mainly affected by daily rainfall; (iv) in the growing season, warming increased greenhouse warming potential (GWP) of the alpine meadow by 74.5%, the N fertilization decreased GWP of the warming plots by 13.9% but it was not statistically significant. These results indicate that (i) relative to future climate warming (or permafrost thawing), there could be a hysteresis of GHG flux in the alpine meadow of permafrost region; (ii) under the scenario of climate warming, increasing N deposition has limited impacts on the feedback of GHG flux of the alpine meadow. (C) 2017 Elsevier Ltd. All rights reserved.

KeywordSimulated Warming Nitrogen Addition Greenhouse Gas Freeze-thaw Cycles
WOS HeadingsScience & Technology ; Life Sciences & Biomedicine ; Physical Sciences
DOI10.1016/j.atmosenv.2017.03.024
WOS Subject ExtendedEnvironmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
Indexed BySCI
WOS KeywordQINGHAI-TIBETAN PLATEAU ; CARBON-CYCLE FEEDBACKS ; FREEZE-THAW CYCLES ; SOIL RESPIRATION ; ECOSYSTEM RESPIRATION ; N2O FLUXES ; GROWING-SEASON ; CLIMATE-CHANGE ; RECIPROCAL TRANSLOCATION ; TEMPERATURE SENSITIVITY
Language英语
Quartile2区
TOP
WOS SubjectEnvironmental Sciences ; Meteorology & Atmospheric Sciences
WOS IDWOS:000400217900012
Funding OrganizationNational Basic Research Program of China(2013CBA01807) ; National Natural Science Foundation of China(41271224 ; National Science and Technology Support Program of China(2014BAC05B01) ; 91547203)
Citation statistics
Cited Times:35[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imde.ac.cn/handle/131551/18644
Collection山地表生过程与生态调控重点实验室
Affiliation1.Chinese Acad Sci, Key Lab Mt Environm Evolvement & Regulat, Inst Mt Hazards & Environm, Chengdu 610041, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100039, Peoples R China
First Author Affilication中国科学院水利部成都山地灾害与环境研究所
Recommended Citation
GB/T 7714
Chen, Xiaopeng,Wang, Genxu,Zhang, Tao,et al. Effects of warming and nitrogen fertilization on GHG flux in the permafrost region of an alpine meadow[J]. ATMOSPHERIC ENVIRONMENT,2017,157:111-124.
APA Chen, Xiaopeng.,Wang, Genxu.,Zhang, Tao.,Mao, Tianxu.,Wei, Da.,...&Song, Chunlin.(2017).Effects of warming and nitrogen fertilization on GHG flux in the permafrost region of an alpine meadow.ATMOSPHERIC ENVIRONMENT,157,111-124.
MLA Chen, Xiaopeng,et al."Effects of warming and nitrogen fertilization on GHG flux in the permafrost region of an alpine meadow".ATMOSPHERIC ENVIRONMENT 157(2017):111-124.
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