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@ARTICLE{Herbst:5536,
      author       = {Herbst, M. and Prolingheuer, N. and Graf, A. and Huisman,
                      J. A. and Weihermüller, L. and Vanderborght, J.},
      title        = {{C}haracterization and {U}nderstanding of {B}are {S}oil
                      {R}espiration {S}patial {V}ariability at {P}lot {S}cale},
      journal      = {Vadose zone journal},
      volume       = {8},
      issn         = {1539-1663},
      address      = {Madison, Wis.},
      publisher    = {SSSA},
      reportid     = {PreJuSER-5536},
      pages        = {762 - 771},
      year         = {2009},
      note         = {This research was supported by the German Research
                      Foundation DFG (Transregional Collaborative Research Centre
                      32-Patterns in Soil-Vegetation-Atmosphere Systems:
                      Monitoring, modelling and data assimilation).},
      abstract     = {Soil respiration is known to be highly variable with time.
                      Less is known, however, about the spatial variability of
                      heterotrophic soil respiration at the plot scale. We
                      simultaneously measured soil heterotrophic respiration, soil
                      temperature, and soil water content at 48 locations with a
                      nested sampling design and at 76 locations with a regular
                      grid plus refinement within a 13- by 14-m bare soil plot for
                      15 measurement dates. Soil respiration was measured with a
                      closed chamber covering a surface area of 0.032 m(2). A
                      geostatistical data analyses indicated a mean range of 2.7 m
                      for heterotrophic soil respiration. We detected rather high
                      coefficients of variation of CO2 respiration between 0.13
                      and 0.80, with an average of 0.33. The number of
                      observations required to estimate average respiration fluxes
                      at a $5\%$ error level ranged between 5 and 123. The
                      analysis of the temporal persistence revealed that a subset
                      of 17 sampling locations is sufficient to estimate average
                      respiration fluxes at a tolerable root mean square error of
                      0.15 g C m(-2) d(-1). Statistical analysis revealed that the
                      spatiotemporal variability of heterotrophic soil respiration
                      could be explained by the state variables soil temperature
                      and water content. The spatial variability of respiration
                      was mainly driven by variability in soil water content; the
                      variability in the soil water content was almost an order of
                      magnitude higher than the variability in soil temperature.},
      keywords     = {J (WoSType)},
      cin          = {ICG-4},
      ddc          = {550},
      cid          = {I:(DE-Juel1)VDB793},
      pnm          = {Terrestrische Umwelt},
      pid          = {G:(DE-Juel1)FUEK407},
      shelfmark    = {Environmental Sciences / Soil Science / Water Resources},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000268871900023},
      doi          = {10.2136/vzj2008.0068},
      url          = {https://juser.fz-juelich.de/record/5536},
}