2016
DOI: 10.5194/bg-13-63-2016
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Energy balance closure on a winter wheat stand: comparing the eddy covariance technique with the soil water balance method

Abstract: Abstract. The energy balance of eddy covariance (EC) flux data is typically not closed. The nature of the gap is usually not known, which hampers using EC data to parameterize and test models. In the present study we crosschecked the evapotranspiration data obtained with the EC method (ET EC ) against ET rates measured with the soil water balance method (ET WB ) at winter wheat stands in southwest Germany. During the growing seasons 2012 and 2013, we continuously measured, in a half-hourly resolution, latent h… Show more

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Cited by 36 publications
(25 citation statements)
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“…Most research has shown that the sum of H and LE from EC instrumentation was always less than the available energy [29,34,39]. Thus, using the residual method, which accounts for the residual energy on LE, can lead to overestimation of LE (or ET) by the EC method with respect to the BREB method.…”
Section: Discussionmentioning
confidence: 99%
See 1 more Smart Citation
“…Most research has shown that the sum of H and LE from EC instrumentation was always less than the available energy [29,34,39]. Thus, using the residual method, which accounts for the residual energy on LE, can lead to overestimation of LE (or ET) by the EC method with respect to the BREB method.…”
Section: Discussionmentioning
confidence: 99%
“…Imukova et al [34] observed that the ideal conditions for applying the water balance method are periods with low rainfall and low or absent seepage. Therefore, to minimize the uncertainties in drainage and seepage calculations, dry periods that met the mentioned criteria were selected from the growing season, which led to 6 OPs from May through October.…”
Section: Comparison During Observation Periodsmentioning
confidence: 99%
“…Based on annual water balances for three small watersheds, he documented that EC can provide unbiased estimates of ET. Imukova et al (2016) applied the soil water balance method for a winter wheat (Triticum aestivum L.) crop using soil sampling campaigns for observation periods of 14-94 d. They also demonstrated good agreement between ET wb and ET EC and concluded that LE is not the major component of the energy balance gap. Alfieri et al (2011Alfieri et al ( , 2012, Evett, Kustas, et al (2012), and Evett, Schwartz, et al (2012) evaluated methods for quantifying ET during the growing season for an irrigated semiarid cotton (Gossypium hirsutum L.) field.…”
Section: Comparison Of Et Ec and Et Wbmentioning
confidence: 99%
“…CC BY 4.0 License. information about meteorological and soil conditions can be found in Imukova et al (2016), Ingwersen et al (2015), Wizemann et al (2014) and also in Table 1. The Swabian Jura region (SJ) is characterized by a colder and harsher climate than KR due to its higher elevation. Accordingly, crops are generally sowed and harvested later than in KR.…”
Section: Site Descriptionmentioning
confidence: 99%