The growing season greenhouse gas balance of a continental tundra site in the Indigirka lowlands, NE Siberia

Autor: J. van Huissteden, Trofim C. Maximov, D. A. Suzdalov, A.M.R. Petrescu, Alexander V. Kononov, M. K. van der Molen, A. J. Dolman, Sergey V. Karsanaev, Frans-Jan W. Parmentier
Přispěvatelé: Department of Hydrology and Geo-Environmental Sciences [Amsterdam], Vrije Universiteit Amsterdam [Amsterdam] (VU), Institute of Biological Problems of the Cryolithozone, Russian Academy of Sciences [Moscow] (RAS), Hydrology and Geo-environmental sciences, EGU, Publication
Jazyk: angličtina
Rok vydání: 2007
Předmět:
010504 meteorology & atmospheric sciences
Eddy covariance
lcsh:Life
Growing season
[SDU.STU]Sciences of the Universe [physics]/Earth Sciences
Photosynthesis
Atmospheric sciences
[SDU.ASTR] Sciences of the Universe [physics]/Astrophysics [astro-ph]
01 natural sciences
Methane
[PHYS.ASTR.CO]Physics [physics]/Astrophysics [astro-ph]/Cosmology and Extra-Galactic Astrophysics [astro-ph.CO]
chemistry.chemical_compound
lcsh:QH540-549.5
SDG 13 - Climate Action
[SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces
environment
Ecology
Evolution
Behavior and Systematics
0105 earth and related environmental sciences
Earth-Surface Processes
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean
Atmosphere
Humid continental climate
[SDU.ASTR]Sciences of the Universe [physics]/Astrophysics [astro-ph]
[SDU.OCEAN] Sciences of the Universe [physics]/Ocean
Atmosphere
lcsh:QE1-996.5
Carbon sink
04 agricultural and veterinary sciences
15. Life on land
Tundra
[SDU.ENVI] Sciences of the Universe [physics]/Continental interfaces
environment
lcsh:Geology
lcsh:QH501-531
chemistry
13. Climate action
[PHYS.ASTR.CO] Physics [physics]/Astrophysics [astro-ph]/Cosmology and Extra-Galactic Astrophysics [astro-ph.CO]
Climatology
Carbon dioxide
040103 agronomy & agriculture
[SDU.STU] Sciences of the Universe [physics]/Earth Sciences
0401 agriculture
forestry
and fisheries
Environmental science
lcsh:Ecology
Zdroj: Biogeosciences, Vol 4, Iss 6, Pp 985-1003 (2007)
Scopus-Elsevier
Biogeosciences
Biogeosciences, European Geosciences Union, 2007, 4 (6), pp.985-1003
Biogeosciences, 4, 985-1003. European Geosciences Union
ResearcherID
van der Molen, M K, van Huissteden, J, Parmentier, F J W, Petrescu, A M R, Dolman, A J, Maximov, T C, Kononov, A V, Karsanaev, S V & Suzdalov, D A 2007, ' The growing season greenhouse gas balance of a continental tundra site in the Indigirka lowlands, NE Siberia. ', Biogeosciences, vol. 4, pp. 985-1003 . https://doi.org/10.5194/bg-4-985-2007
ISSN: 1726-4189
1726-4170
DOI: 10.5194/bg-4-985-2007
Popis: Carbon dioxide and methane fluxes were measured at a tundra site near Chokurdakh, in the lowlands of the Indigirka river in north-east Siberia. This site is one of the few stations on Russian tundra and it is different from most other tundra flux stations in its continentality. A suite of methods was applied to determine the fluxes of NEE, GPP, Reco and methane, including eddy covariance, chambers and leaf cuvettes. Net carbon dioxide fluxes were high compared with other tundra sites, with NEE=−92 g C m−2 yr−1, which is composed of an Reco=+141 g C m−2 yr−1 and GPP=−232 g C m−2 yr−1. This large carbon dioxide sink may be explained by the continental climate, that is reflected in low winter soil temperatures (−14°C), reducing the respiration rates, and short, relatively warm summers, stimulating high photosynthesis rates. Interannual variability in GPP was dominated by the frequency of light limitation (Rg−2), whereas Reco depends most directly on soil temperature and time in the growing season, which serves as a proxy of the combined effects of active layer depth, leaf area index, soil moisture and substrate availability. The methane flux, in units of global warming potential, was +28 g C-CO2e m−2 yr−1, so that the greenhouse gas balance was −64 g C-CO2e m−2 yr−1. Methane fluxes depended only slightly on soil temperature and were highly sensitive to hydrological conditions and vegetation composition.
Databáze: OpenAIRE
Externí odkaz: