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Ney, Patrizia [Author]; Graf, Alexander [Author]; Schmidt, Marius [Author]; Valler, Veronika [Author]; Vereecken, Harry [Author]; Bogena, Heye [Author]; Diekkrüger, Bernd [Author]; Drüe, Clemens [Author]; Esser, Odilia [Author]; Heinemann, Günther [Author]; Klosterhalfen, Anne [Author]; Pick, Katharina [Author]; Pütz, Thomas [Author]

CO$_2$ fluxes before and after partial deforestation of a spruce forest

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  • Media type: Electronic Conference Proceeding
  • Title: CO$_2$ fluxes before and after partial deforestation of a spruce forest
  • Contributor: Ney, Patrizia [Author]; Graf, Alexander [Author]; Schmidt, Marius [Author]; Valler, Veronika [Author]; Vereecken, Harry [Author]; Bogena, Heye [Author]; Diekkrüger, Bernd [Author]; Drüe, Clemens [Author]; Esser, Odilia [Author]; Heinemann, Günther [Author]; Klosterhalfen, Anne [Author]; Pick, Katharina [Author]; Pütz, Thomas [Author]
  • imprint: Forschungszentrum Jülich: JuSER (Juelich Shared Electronic Resources), 2018
  • Published in: DLR Conference on Climate Change, Köln, Germany, 2018-04-17 - 2018-04-19
  • Language: English
  • Origination:
  • Footnote: Diese Datenquelle enthält auch Bestandsnachweise, die nicht zu einem Volltext führen.
  • Description: Forest ecosystems in the mid latitudes are a sink for atmospheric carbon dioxide (CO$_2$) and thus play an important role in the global carbon cycle [1]. Deforestation has a major impact on the CO$_2$ exchange between the forested ecosystem and the atmosphere. After deforestation, the former forest sink becomes a source for CO$_2$. We present seven years of CO$_2$ flux measurements sampled above a 70 year old spruce monoculture, of which 9 ha was partially deforested three years after the measurement started, in order to promote the natural succession towards deciduous forest.The measurements were carried out in the Wüstebach research site, a small headwater catchment (38.5 ha) within the TERENO (TERrestrial ENvironmental Observatories) network in the Eifel National Park Germany (50°30'N, 06°19'E, 595-629 m a.s.l.). An EC system, mounted on the top of a 37.8 m high tower, continuously samples fluxes of momentum, sensible heat, latent heat and CO$_2$. After the partial deforestation, a second EC station was installed in the middle of the clearcut and operated simultaneously to the forest station. Full time series and annual carbon budgets of the net ecosystem exchange of CO$_2$ (NEE) and its components gross primary production (GPP) and total ecosystem respiration were calculated by using gap filling and flux partitioning methods. Besides the NEE and its components, we also considered the measured soil respiration and compare the climate effect of changed CO$_2$ sequestration with the biophysical effect of changed albedo.In contrast to the deforested area, annual sums of NEE measured above the forest showed a strong carbon sink with small inter-annual variability. In the first year after partial deforestation, regrowth on the deforested area consisted mainly of grasses and shrub vegetation while since the second year also growth of new trees (predominantly mountain ash) increased. The recovering vegetation is reflected in the annual sums of NEE, which decreased from a carbon source of + 500 g C m-2 y-1 towards ...
  • Access State: Open Access