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

van der Molen, M.K.; van Huissteden, J.; Parmentier, Frans-Jan LU ; Petrescu, A.M.R.; Dolman, A.J.; Maximov, T.C.; Kononov, A.V.; Karsanaev, S.V. and Suzdalov, D.A. (2007) In Biogeosciences 4(6). p.985-1003
Abstract
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, R-eco 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 R-eco=+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 degrees C),... (More)
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, R-eco 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 R-eco=+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 degrees 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 (R-g<200 W m(-2)), whereas R-eco 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-CO(2)e m(-2) yr(-1), so that the greenhouse gas balance was -64 g C-CO(2)e m(-2) yr(-1). Methane fluxes depended only slightly on soil temperature and were highly sensitive to hydrological conditions and vegetation composition. (Less)
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author
publishing date
type
Contribution to journal
publication status
published
subject
in
Biogeosciences
volume
4
issue
6
pages
985 - 1003
publisher
Copernicus Publications
external identifiers
  • scopus:36248974227
ISSN
1726-4189
DOI
10.5194/bg-4-985-2007
language
English
LU publication?
no
id
1b5b0872-03d7-455a-8008-be2e7480c5df (old id 4221296)
alternative location
http://www.biogeosciences.net/4/985/2007/bg-4-985-2007.html
date added to LUP
2014-01-08 15:54:52
date last changed
2017-11-12 03:21:15
@article{1b5b0872-03d7-455a-8008-be2e7480c5df,
  abstract     = {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, R-eco 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 R-eco=+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 degrees 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 (R-g&lt;200 W m(-2)), whereas R-eco 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-CO(2)e m(-2) yr(-1), so that the greenhouse gas balance was -64 g C-CO(2)e m(-2) yr(-1). Methane fluxes depended only slightly on soil temperature and were highly sensitive to hydrological conditions and vegetation composition.},
  author       = {van der Molen, M.K. and van Huissteden, J. and Parmentier, Frans-Jan and Petrescu, A.M.R. and Dolman, A.J. and Maximov, T.C. and Kononov, A.V. and Karsanaev, S.V. and Suzdalov, D.A.},
  issn         = {1726-4189},
  language     = {eng},
  number       = {6},
  pages        = {985--1003},
  publisher    = {Copernicus Publications},
  series       = {Biogeosciences},
  title        = {The growing season greenhouse gas balance of a continental tundra site in the Indigirka lowlands, NE Siberia},
  url          = {http://dx.doi.org/10.5194/bg-4-985-2007},
  volume       = {4},
  year         = {2007},
}