ChenWangWuEtAl2012

Référence

Chen, H., Wang, Y., Wu, N., Zhu, D., Li, W., Gao, Y., Zhu, Qiu'An, Yang, G., Peng, C. (2012) Spatiotemporal variations in nitrous oxide emissions from an open fen on the Qinghai-tibetan plateau: A 3-year study. Water, Air, and Soil Pollution, 223(9):6025-6034. (Scopus )

Résumé

To understand spatial and temporal variations of nitrous oxide (N 2O) fluxes, we chose to measure N 2O emissions from three plant stands (Kobresia tibetica, Carex muliensis, and Eleocharis valleculosa stands) in an open fen on the northeastern Qinghai-Tibetan plateau during the growing seasons from 2005 to 2007. The overall mean N 2O emission rate was about 0.018±0.056 mgN m -2h -1 during the growing seasons from 2005 to 2007, with highly spatiotemporal variations. The hummock (K. tibetica stand) emitted N 2O at the highest rate about 0.025±0.051 mgN m -2h -1, followed by the hollow stands: the E. valleculosa stand about 0.012±0.046 mgN m -2h -1 and the C. muliensis stand about 0.017±0.068 mgN m -2h -1. Within each stand, we also noted significant variations of N 2O emission. We also observed the significant seasonal and inter-annual variation of N 2O fluxes during the study period. The highest N 2O emission rate was all recorded in July or August in each year from 2005 to 2007. Compared with the mean value of 2005, we found the drought of 2006 significantly increased N 2O emissions by 104 times in the E. valleculosa stand, 45 times in K. tibetica stand, and 18 times in the C. muliensis stand. Though there was no significant relation between standing water depths and N 2O emissions, we still considered it related to the spatiotemporal dynamics of soil water regime under climate change. © Springer Science+Business Media Dordrecht 2012.

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@ARTICLE { ChenWangWuEtAl2012,
    AUTHOR = { Chen, H. and Wang, Y. and Wu, N. and Zhu, D. and Li, W. and Gao, Y. and Zhu, Qiu'An and Yang, G. and Peng, C. },
    TITLE = { Spatiotemporal variations in nitrous oxide emissions from an open fen on the Qinghai-tibetan plateau: A 3-year study },
    JOURNAL = { Water, Air, and Soil Pollution },
    YEAR = { 2012 },
    VOLUME = { 223 },
    PAGES = { 6025-6034 },
    NUMBER = { 9 },
    ABSTRACT = { To understand spatial and temporal variations of nitrous oxide (N 2O) fluxes, we chose to measure N 2O emissions from three plant stands (Kobresia tibetica, Carex muliensis, and Eleocharis valleculosa stands) in an open fen on the northeastern Qinghai-Tibetan plateau during the growing seasons from 2005 to 2007. The overall mean N 2O emission rate was about 0.018±0.056 mgN m -2h -1 during the growing seasons from 2005 to 2007, with highly spatiotemporal variations. The hummock (K. tibetica stand) emitted N 2O at the highest rate about 0.025±0.051 mgN m -2h -1, followed by the hollow stands: the E. valleculosa stand about 0.012±0.046 mgN m -2h -1 and the C. muliensis stand about 0.017±0.068 mgN m -2h -1. Within each stand, we also noted significant variations of N 2O emission. We also observed the significant seasonal and inter-annual variation of N 2O fluxes during the study period. The highest N 2O emission rate was all recorded in July or August in each year from 2005 to 2007. Compared with the mean value of 2005, we found the drought of 2006 significantly increased N 2O emissions by 104 times in the E. valleculosa stand, 45 times in K. tibetica stand, and 18 times in the C. muliensis stand. Though there was no significant relation between standing water depths and N 2O emissions, we still considered it related to the spatiotemporal dynamics of soil water regime under climate change. © Springer Science+Business Media Dordrecht 2012. },
    COMMENT = { Export Date: 7 December 2012 Source: Scopus CODEN: WAPLA doi: 10.1007/s11270-012-1336-9 },
    ISSN = { 00496979 (ISSN) },
    KEYWORDS = { Biogeochemistry, Extreme climate events, Global change, Greenhouse gases, Inter-annual variations },
    OWNER = { Luc },
    TIMESTAMP = { 2012.12.07 },
    URL = { http://www.scopus.com/inward/record.url?eid=2-s2.0-84870255066&partnerID=40&md5=874edddae7c8bec408eadd948360679e },
}

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