Comparison of forest evapotranspiration from ECEB-measurements over a spruce stand with the water budget of a catchment

Frühauf, Cathleen; Zimmermann, Lothar; Bernhofer, C.

doi:10.1016/s1464-1909(99)00084-2

Cited by 8 publications

(4 citation statements)

References 9 publications

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“…The field water balance method is typically used in combination with physical and empirical (regression) computer models. More specific information is found in [ 85 ] [ 49 ].…”

Section: Evapotranspiration Assessment Techniques At Different Scales Of Observationmentioning

confidence: 99%

See 1 more Smart Citation

Assessment of Evapotranspiration and Soil Moisture Content Across Different Scales of Observation

Verstraeten

Veroustraete

Feyen

2008

Sensors

306

171

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The proper assessment of evapotranspiration and soil moisture content are fundamental in food security research, land management, pollution detection, nutrient flows, (wild-) fire detection, (desert) locust, carbon balance as well as hydrological modelling; etc. This paper takes an extensive, though not exhaustive sample of international scientific literature to discuss different approaches to estimate land surface and ecosystem related evapotranspiration and soil moisture content. This review presents: a summary of the generally accepted cohesion theory of plant water uptake and transport including a shortlist of meteorological and plant factors influencing plant transpiration;a summary on evapotranspiration assessment at different scales of observation (sap-flow, porometer, lysimeter, field and catchment water balance, Bowen ratio, scintillometer, eddy correlation, Penman-Monteith and related approaches);a summary on data assimilation schemes conceived to estimate evapotranspiration using optical and thermal remote sensing; andfor soil moisture content, a summary on soil moisture retrieval techniques at different spatial and temporal scales is presented.Concluding remarks on the best available approaches to assess evapotranspiration and soil moisture content with and emphasis on remote sensing data assimilation, are provided.

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“…The field water balance method is typically used in combination with physical and empirical (regression) computer models. More specific information is found in [ 85 ] [ 49 ].…”

Section: Evapotranspiration Assessment Techniques At Different Scales Of Observationmentioning

confidence: 99%

“…Frühauf et al [ 85 ] concluded that the ET of forest stands in a catchment near Dresden (Germany) and EC measurements elicit a good agreement, though different forest stands had a different age, and though different scales of measurement were compared.…”

Section: Measurements Models and Model Selectionmentioning

confidence: 99%

Assessment of Evapotranspiration and Soil Moisture Content Across Different Scales of Observation

Verstraeten

Veroustraete

Feyen

2008

Sensors

306

171

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show abstract

“…Flux measurements began in 1995, and since then an extensive suite of meteorological, hydrological, and ecological measurements, and remote sensing observations have been used to investigate the climate and the exchange processes in and above the forest (e.g., Frühauf et al 1999;Bernhofer et al 2003Bernhofer et al , 2011Feigenwinter et al 2004;Grünwald and Bernhofer 2007;Moderow et al 2007;Schwärzel et al 2009;Queck et al 2012;Eysn et al 2013;Moderow and Bernhofer 2014). Footprint investigations (not regarding the small-scale vegetation structure) have shown that the site is reasonably homogeneous, with fluxes representative of the spruce-dominated area around the Fluxnet tower (Rebmann et al 2005).…”

Section: Sitementioning

confidence: 99%

The TurbEFA Field Experiment—Measuring the Influence of a Forest Clearing on the Turbulent Wind Field

Queck

Bernhofer

Bienert

et al. 2016

Boundary-Layer Meteorol

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Forest ecosystems play an important role in the interaction between the land surface and the atmosphere. Measurements and modelling efforts have revealed significant uncertainties in state-of-the-art flux assessments due to spatial inhomogeneities in the airflow and land surface. Here, a field experiment is used to describe the turbulent flow across a typical Central European forest clearing. A three-dimensional model of the inhomogeneous forest stand was developed using an innovative approach based on terrestrial laser-scanner technology. The comparison of the wind statistics of two measurement campaigns (5 and 12 months long) showed the spatial and temporal representativeness of the ultrasonic anemometer measurements within the canopy. An improved method for the correction of the vertical velocity enables the distinction between the instrumental offsets and the vertical winds due to the inclination of the instrument. Despite a 13 % fraction of deciduous plants within the otherwise evergreen canopy, the effects of phenological seasons on the velocity profiles were small. The data classified according to the wind speed revealed the intermittent nature of recirculating air in the clearing. Furthermore, the development of sub-canopy wind-speed maxima is explained by considering the velocity moments and the momentum equation (including measurements of the local pressure gradient). Clearings deflect the flow downward and feed the sub-canopy flow, i.e., advective fluxes, according to wind speed and, likely, clearing size, whereas local pressure gradients play an important role in the development of sub-canopy flow. The presented dataset is freely available at the project homepage.

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“…Sites 2 (Hesse Forest, France), 3 (Harvard Forest, MA, USA), and 4 (Soroe, Denmark) are different types of deciduous broadleaf forests (Granier et al, 2000;Barford et al, 2001;Pilegaard et al, , 2003. Site 5 (Tharandt, Germany) is a temperate evergreen coniferous forest (Fruhauf et al, 1999, Feigenwinter et al, 2004, and Site 6 (WLEF Tower, WI, USA) covers a larger area that is at the ecotone between boreal coniferous forest and deciduous broadleaf forest (Davis et al, 2003) (Table 2).…”

Section: Reducing Carbon Quantity Risk With Geographical Diversificationmentioning

confidence: 99%

Geographic diversification of carbon risk—A methodology for assessing carbon investments using eddy correlation measurements

Hultman

2006

Global Environmental Change

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Comparison of forest evapotranspiration from ECEB-measurements over a spruce stand with the water budget of a catchment

Cited by 8 publications

References 9 publications

Assessment of Evapotranspiration and Soil Moisture Content Across Different Scales of Observation

Assessment of Evapotranspiration and Soil Moisture Content Across Different Scales of Observation

The TurbEFA Field Experiment—Measuring the Influence of a Forest Clearing on the Turbulent Wind Field

Geographic diversification of carbon risk—A methodology for assessing carbon investments using eddy correlation measurements

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