The Bowen Ratio/Energy Balance method and detailed temperature profile measurements to improve data quality control
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F62156489%3A43210%2F15%3A43908078" target="_blank" >RIV/62156489:43210/15:43908078 - isvavai.cz</a>
Alternative codes found
RIV/67179843:_____/15:00456516
Result on the web
<a href="http://envimet.czechglobe.cz/files/present/akce/SbornikKonference.pdf" target="_blank" >http://envimet.czechglobe.cz/files/present/akce/SbornikKonference.pdf</a>
DOI - Digital Object Identifier
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Alternative languages
Result language
angličtina
Original language name
The Bowen Ratio/Energy Balance method and detailed temperature profile measurements to improve data quality control
Original language description
Water plays a key role in the functionality and sustainability of ecosystems. In light of predicted climate change, research should focus on the water cycle and its individual components. The main component of water balance driving water from ecosystems is evapotranspiration (ET). One standard method for measuring ET is the Bowen Ratio/Energy Balance (BREB) method. It is based on the assumption that water vapour and heat are transported by identical eddies with equal efficiency. When using the BREB method, we assume that the profiles of temperature and air humidity are ideally logarithmic or at least consistent. Since the BREB method is usually based on measurements of temperature and humidity at only two heights, it is difficult to verify whether this assumption has been fulfilled. Potential profile inconsistencies are more likely for temperature because the sensible heat flux changes its sign more often and negative latent heat flux is not physically possible during positive sensible heat flux. We therefore conducted a field experiment using a 4-m-high measurement mast with 20 thermocouples for detailed measurement of air temperature profiles above different covers, e.g. grassland, spring barley, and poplar plantations. Our main objective was to investigate the basic assumptions of the BREB method, i.e. the temperature profile's consistency under various weather conditions. To be more specific, we aimed to investigate whether inflexion points occurred within the temperature profile and if so when.
Czech name
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Czech description
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Classification
Type
D - Article in proceedings
CEP classification
GC - Plant growing, crop rotation
OECD FORD branch
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Result continuities
Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2015
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Article name in the collection
Global Change: a Complex Challenge
ISBN
978-80-87902-10-3
ISSN
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e-ISSN
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Number of pages
4
Pages from-to
62-65
Publisher name
Centrum výzkumu globální změny AV ČR, v.v.i.
Place of publication
Brno
Event location
Brno
Event date
Mar 23, 2015
Type of event by nationality
WRD - Celosvětová akce
UT code for WoS article
000381161600014