Spatial variability of greenhouse gas effluxes and their controlling factors in the Poyang lake in China

Lixiang Liu, Ming Xu, Mao Lin, Xin Zhang

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

CO2, CH4 (GHG) emissions are globally important in China, but few field observations have been made in freshwater lakes. In this paper, we measured the GHG effluxes from 44 sampling locations among four sub-regions in Poyang Lake in China in October 2010 using floating chambers. The mean CO2, CH4 effluxes were 0.23 μmol m-2·s-1, 3.0 nmol·m-2·s-1, and 0.11 nmol m-2·s-1, ranging from -0.25 to 0.54 μmol· m-2·s-1, 1.4 to 8.9 nmol m-2·s-1, and 0.012 to 0.21 nmol· m-2·s-1for the CO2, CH4, and N2O efflux, respectively. We found differently related tendencies between GHG effluxes and environmental parameters for each sub-region and, totally, four sub-regions together. The 16 environmental factors explained the GHG effluxes with 55%, 70%, and 89% of the variation in CO2, CH4, and N2O efflux, respectively, in Poyang Lake. Our analysis revealed that sediment C/N ratio, water depth, and the difference of air-water temperature were significantly contributing variables for GHG effluxes in the lake.

Original languageEnglish (US)
Pages (from-to)749-758
Number of pages10
JournalPolish Journal of Environmental Studies
Volume22
Issue number3
StatePublished - Jul 1 2013

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Greenhouse gases
Lakes
greenhouse gas
lake
Water
water depth
Sediments
environmental factor
water temperature
air temperature
Sampling
sampling
Air
sediment
Temperature

All Science Journal Classification (ASJC) codes

  • Environmental Science(all)
  • Environmental Chemistry

Cite this

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title = "Spatial variability of greenhouse gas effluxes and their controlling factors in the Poyang lake in China",
abstract = "CO2, CH4 (GHG) emissions are globally important in China, but few field observations have been made in freshwater lakes. In this paper, we measured the GHG effluxes from 44 sampling locations among four sub-regions in Poyang Lake in China in October 2010 using floating chambers. The mean CO2, CH4 effluxes were 0.23 μmol m-2·s-1, 3.0 nmol·m-2·s-1, and 0.11 nmol m-2·s-1, ranging from -0.25 to 0.54 μmol· m-2·s-1, 1.4 to 8.9 nmol m-2·s-1, and 0.012 to 0.21 nmol· m-2·s-1for the CO2, CH4, and N2O efflux, respectively. We found differently related tendencies between GHG effluxes and environmental parameters for each sub-region and, totally, four sub-regions together. The 16 environmental factors explained the GHG effluxes with 55{\%}, 70{\%}, and 89{\%} of the variation in CO2, CH4, and N2O efflux, respectively, in Poyang Lake. Our analysis revealed that sediment C/N ratio, water depth, and the difference of air-water temperature were significantly contributing variables for GHG effluxes in the lake.",
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Spatial variability of greenhouse gas effluxes and their controlling factors in the Poyang lake in China. / Liu, Lixiang; Xu, Ming; Lin, Mao; Zhang, Xin.

In: Polish Journal of Environmental Studies, Vol. 22, No. 3, 01.07.2013, p. 749-758.

Research output: Contribution to journalArticle

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