TERENO-SOILCan: a lysimeter-network in Germany observing soil processes and plant diversity influenced by climate change

Pütz, Thomas; Kiese, Ralf; Wollschläger, Ute; Groh, Jannis; Rupp, Holger; Zacharias, Steffen; Priesack, Eckart; Gerke, Horst H.; Gasché, Rainer; Bens, Oliver; Borg, Erik; Baeßler, Cornelia; Kaiser, Knut; Herbrich, Marcus; Munch, Jean Charles; Sommer, Michael; Vogel, Hans‐Jörg; Vanderborght, Jan; Vereecken, Harry

doi:10.1007/s12665-016-6031-5

Cited by 86 publications

(129 citation statements)

References 26 publications

Supporting

Mentioning

129

Contrasting

Order By: Relevance

“…and Wüstebach (50°30′10 ″N, 6°19′41″E, 625 m a.s.l.). Both are located in the TERENO Eifel/Lower Rhine Valley observatory in Germany and belong to the German wide lysimeter network SOILCan (Pütz et al, ). The vegetation on and around the lysimeters in Wüstebach, which is located in the Eifel National Park, corresponds to a natural forest meadow with no active land use.…”

Section: Methodsmentioning

confidence: 99%

“…This can more realistically represent ET processes in lysimeters under conditions of upward‐directed water fluxes from shallow groundwater tables or deeper soil layers (Groh et al, ; Karimov et al, ; Schwaerzel & Bohl, ). In addition to technological improvements that enable measuring mass changes with high accuracy and temporal resolution, the data analysis has made substantial progress by developing quality checks and algorithms to reduce the impact of noise on lysimeter balance data (Küpper et al, ; Marek et al, ; Peters et al, , ; Pütz et al, ). Hence, we used state of the art weighable lysimeter systems with a high temporal resolution and precision to quantify ET N and to investigate the following points: What is the contribution of ET N to the total ET on the seasonal and annual time scale in two low mountain range grassland ecosystems under a humid and temperate climate? Which atmospheric‐ and soil‐related drivers control nighttime and daytime ET ? Can approaches that are used to predict ET based on meteorological variables and that are based on the land surface energy balance predict ET N and its contribution to the total ET ? To what extent is ET N increased during hot days and can this increase be predicted? …”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Quantification and Prediction of Nighttime Evapotranspiration for Two Distinct Grassland Ecosystems

Groh

Pütz

Gerke

et al. 2019

Water Resources Research

Self Cite

View full text Add to dashboard Cite

Evapotranspiration (ET) is, after precipitation, the second largest flux at the land surface in the water cycle and occurs mainly during daytime. Less attention has been given to water fluxes from the land surface into the atmosphere during nighttime (i.e., between sunset and sunrise). The nighttime ET (ETN) may be estimated based on models that use meteorological data; however, due to missing experimental long‐term data, the verification of ETN estimates is limited. In this paper, the amount of ETN for two grassland ecosystems was determined from highly temporally resolved and precise weighing lysimeter data. We found that annual ETN ranged between 3.5% and 9.5% of daytime annual ET (ETD) and occurred mainly during wet soil and canopy surface conditions, which suggests that ETN is largely related to evaporation. ETN was positively correlated with wind speed. Dew formation, ranging from 4.8% to 6.4% of annual precipitation, was in absolute terms larger than ETN. The prediction of ETN with the Penman‐Monteith model improved if the aerodynamic and surface resistance parameters were based on vegetation height observations and the nighttime stomatal resistance parameter was assumed to be zero. The occurrence of hot days during the observation period showed to increase average ETN rates. Our results suggest that ETN can be observed with precision weighing lysimeters, was a not negligible component in the water balance of the grassland ecosystems, and thus needs more attention when simulating land surface hydrological processes.

show abstract

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Quantification and Prediction of Nighttime Evapotranspiration for Two Distinct Grassland Ecosystems

Groh

Pütz

Gerke

et al. 2019

Water Resources Research

Self Cite

View full text Add to dashboard Cite

show abstract

“…The sites Fendt and Graswang (Figure ) are part of the TERENO‐SOILCan network, equipped with fully automated lysimeter systems with standardised design and sensor installations ensuring the comparability between the different experimental sites (Pütz et al, ). Every lysimeter station consists of six lysimeters arranged annularly as a hexagon with a service well in the centre.…”

Section: Methodsmentioning

confidence: 99%

“…The lysimeters are equipped with soil moisture, matric potential, and temperature sensors at different depths. For more detailed description of the measurement set‐up, see Pütz et al ().…”

Section: Methodsmentioning

confidence: 99%

See 1 more Smart Citation

Evaluation of energy balance closure adjustment methods by independent evapotranspiration estimates from lysimeters and hydrological simulations

Mauder

Genzel

et al. 2017

Hydrological Processes

View full text Add to dashboard Cite

Non‐closure of the surface energy balance is a frequently observed phenomenon of hydrometeorological field measurements, when using the eddy‐covariance method, which can be ascribed to an underestimation of the turbulent fluxes. Several approaches have been proposed in order to adjust the measured fluxes for this apparent systematic error. However, there are uncertainties about partitioning of the energy balance residual between the sensible and latent heat flux and whether such a correction should be applied on 30‐min data or longer time scales. The data for this study originate from two grassland sites in southern Germany, where measurements from weighable lysimeters are available as reference. The adjusted evapotranspiration rates are also compared with joint energy and water balance simulations using a physically based distributed hydrological model. We evaluate two adjustment methods: the first one preserves the Bowen ratio and the correction factor is determined on a daily basis. The second one attributes a smaller portion of the residual energy to the latent heat flux than to the sensible heat flux for closing the energy balance for every 30‐min flux integration interval. Both methods lead to an improved agreement of the eddy‐covariance based fluxes with the independent lysimeter estimates and the physically based model simulations. The first method results in a better comparability of evapotranspiration rates, and the second method leads to a smaller overall bias. These results are similar between both sites despite considerable differences in terrain complexity and grassland management. Moreover, we found that a daily adjustment factor leads to less scatter than a complete partitioning of the residual for every half‐hour time interval. The vertical temperature gradient in the surface layer and friction velocity were identified as important predictors for a potential future parameterisation of the energy balance residual.

show abstract

Spatiotemporal relations between water budget components and soil water content in a forested tributary catchment

Graf

Bogena

Drüe

et al. 2014

Water Resources Research

105

113

View full text Add to dashboard Cite

We examined 3 years of measured daily values of all major water budget components (precipitation P, potential evapotranspiration PET, actual evapotranspiration ET, and runoff R) and volumetric soil water content h of a small, forested catchment located in the west of Germany. The spatial distribution of h was determined from a wireless sensor network of 109 points with 3 measurement depths each; ET was calculated from eddy-covariance tower measurements. The water budget was dominantly energy limited, with ET amounting to approximately 90% of PET, and a runoff ratio R/P of 56%. P, ET, and R closed the long-term water budget with a residual of 2% of precipitation. On the daily time scale, the residual of the water budget was larger than on the annual time scale, and explained to a moderate extent by h (R 2 5 0.40). Wavelet analysis revealed subweekly time scales, presumably dominated by unaccounted fast-turnover storage terms such as interception, as a major source of uncertainty in water balance closure. At weekly resolution, soil water content explained more than half (R 2 5 0.62) of the residual. By means of combined empirical orthogonal function and cluster analysis, two slightly different spatial patterns of h could be identified that were associated with mean h values below and above 0.35 cm 3 /cm 3 , respectively. The timing of these patterns as well as the varying coherence between PET, ET, and soil water content responded to changes in water availability, including a moderate response to the European drought in spring 2011.

show abstract

TERENO-SOILCan: a lysimeter-network in Germany observing soil processes and plant diversity influenced by climate change

Cited by 86 publications

References 26 publications

Quantification and Prediction of Nighttime Evapotranspiration for Two Distinct Grassland Ecosystems

Quantification and Prediction of Nighttime Evapotranspiration for Two Distinct Grassland Ecosystems

Evaluation of energy balance closure adjustment methods by independent evapotranspiration estimates from lysimeters and hydrological simulations

Spatiotemporal relations between water budget components and soil water content in a forested tributary catchment

Contact Info

Product

Resources

About