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Decadal water balance of a temperate Scots pine forest (Pinus sylvestris L.) based on measurements and modelling

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Decadal water balance of a temperate Scots pine forest (Pinus sylvestris L.) based on measurements and modelling. / Gielen, B; Verbeeck, H; Neirynck, Johan; Sampson, D. A; Vermeiren, Frederic; Janssens, I. A.

In: Biogeosciences, Vol. 7, No. 4, 2010, p. 1247-1261.

Research output: Contribution to journalA1: Web of Science-article

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@article{d7f4ab54df3e4b68a1c501563277d5eb,
title = "Decadal water balance of a temperate Scots pine forest (Pinus sylvestris L.) based on measurements and modelling",
abstract = "We examined the water balance components of an 80-year-old Scots pine (Pinus sylvestris L.) forest stand in the Campine region of Belgium over a ten year period using five very different approaches; our methods ranged from data intensive measurements to process model simulations. Specifically, we used the conservative ion method (CI), the Eddy Covariance technique (EC), an empirical model (WATBAL), and two process models that vary greatly in their temporal and spatial scaling, the ORCHIDEE global land-surface model and SECRETS a stand- to ecosystem-scale biogeochemical process model. Herein we used the EC technique as a standard for the evapotranspiration (ET) estimates. Using and evaluating process based models with data is extremely useful as models are the primary method for integration of small-scale, process level phenomena into comprehensive description of forest stand or ecosystem function. Results demonstrated that the two process models corresponded well to the seasonal patterns and yearly totals of ET from the EC approach. However, both WATBAL and CI approaches overestimated ET when compared to the EC estimates. We found significant relationships between several meteorological variables (i.e., vapour pressure deficit [VPD], mean air temperature [Tair], and global radiation [Rg]) and ET on monthly basis for all approaches. In contrast, few relationships were significant on annual basis. Independent of the method examined, ET exhibited low inter-annual variability. Consequently, drainage fluxes were highly correlated with annual precipitation for all approaches examined, except CI.",
author = "B Gielen and H Verbeeck and Johan Neirynck and Sampson, {D. A} and Frederic Vermeiren and Janssens, {I. A}",
note = "Publication Authorstring : Gielen, B.; Verbeeck, H.; Neirynck , J.; Sampson, D.A.; Vermeiren, F.; Janssens, I.A. Publication RefStringPartII : <i>Biogeosciences 7(4)</i>: 1247–1261",
year = "2010",
doi = "10.5194/bg-7-1247-2010",
language = "English",
volume = "7",
pages = "1247--1261",
journal = "Biogeosciences",
issn = "1726-4170",
publisher = "Copernicus Publications",
number = "4",

}

RIS

TY - JOUR

T1 - Decadal water balance of a temperate Scots pine forest (Pinus sylvestris L.) based on measurements and modelling

AU - Gielen, B

AU - Verbeeck, H

AU - Neirynck, Johan

AU - Sampson, D. A

AU - Vermeiren, Frederic

AU - Janssens, I. A

N1 - Publication Authorstring : Gielen, B.; Verbeeck, H.; Neirynck , J.; Sampson, D.A.; Vermeiren, F.; Janssens, I.A. Publication RefStringPartII : <i>Biogeosciences 7(4)</i>: 1247–1261

PY - 2010

Y1 - 2010

N2 - We examined the water balance components of an 80-year-old Scots pine (Pinus sylvestris L.) forest stand in the Campine region of Belgium over a ten year period using five very different approaches; our methods ranged from data intensive measurements to process model simulations. Specifically, we used the conservative ion method (CI), the Eddy Covariance technique (EC), an empirical model (WATBAL), and two process models that vary greatly in their temporal and spatial scaling, the ORCHIDEE global land-surface model and SECRETS a stand- to ecosystem-scale biogeochemical process model. Herein we used the EC technique as a standard for the evapotranspiration (ET) estimates. Using and evaluating process based models with data is extremely useful as models are the primary method for integration of small-scale, process level phenomena into comprehensive description of forest stand or ecosystem function. Results demonstrated that the two process models corresponded well to the seasonal patterns and yearly totals of ET from the EC approach. However, both WATBAL and CI approaches overestimated ET when compared to the EC estimates. We found significant relationships between several meteorological variables (i.e., vapour pressure deficit [VPD], mean air temperature [Tair], and global radiation [Rg]) and ET on monthly basis for all approaches. In contrast, few relationships were significant on annual basis. Independent of the method examined, ET exhibited low inter-annual variability. Consequently, drainage fluxes were highly correlated with annual precipitation for all approaches examined, except CI.

AB - We examined the water balance components of an 80-year-old Scots pine (Pinus sylvestris L.) forest stand in the Campine region of Belgium over a ten year period using five very different approaches; our methods ranged from data intensive measurements to process model simulations. Specifically, we used the conservative ion method (CI), the Eddy Covariance technique (EC), an empirical model (WATBAL), and two process models that vary greatly in their temporal and spatial scaling, the ORCHIDEE global land-surface model and SECRETS a stand- to ecosystem-scale biogeochemical process model. Herein we used the EC technique as a standard for the evapotranspiration (ET) estimates. Using and evaluating process based models with data is extremely useful as models are the primary method for integration of small-scale, process level phenomena into comprehensive description of forest stand or ecosystem function. Results demonstrated that the two process models corresponded well to the seasonal patterns and yearly totals of ET from the EC approach. However, both WATBAL and CI approaches overestimated ET when compared to the EC estimates. We found significant relationships between several meteorological variables (i.e., vapour pressure deficit [VPD], mean air temperature [Tair], and global radiation [Rg]) and ET on monthly basis for all approaches. In contrast, few relationships were significant on annual basis. Independent of the method examined, ET exhibited low inter-annual variability. Consequently, drainage fluxes were highly correlated with annual precipitation for all approaches examined, except CI.

U2 - 10.5194/bg-7-1247-2010

DO - 10.5194/bg-7-1247-2010

M3 - A1: Web of Science-article

VL - 7

SP - 1247

EP - 1261

JO - Biogeosciences

JF - Biogeosciences

SN - 1726-4170

IS - 4

ER -

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