Towards a combining of remote sensing and in situ evapotranspiration measurements

0485236 - ÚVGZ 2019 RIV CZ eng C - Conference Paper (international conference)
Fischer, Milan - Jurečka, František - Anderson, M. - Hain, C. - Pozníková, Gabriela - Hlavinka, Petr - Orság, Matěj - Lukas, V. - Žalud, Z. - Trnka, Miroslav
Towards a combining of remote sensing and in situ evapotranspiration measurements.
Quo vaditis agriculture, forestry and society under global change? Conference proceeding. Brno: Global change research institute, 2017 - (Urban, O.; Šprtová, M.; Klem, K.), s. 70-73. ISBN 978-80-87902-22-6.
[Quo vaditis agriculture, forestry and society under Global Change? Velké Karlovice (CZ), 02.10.2017-04.10.2017]
R&D Projects: GA MŠMT(CZ) LO1415
Institutional support: RVO:86652079
Keywords : remote sensing * evapotranspiration * Bowen ratio energy balance
OECD category: Agronomy, plant breeding and plant protection

This study provides preliminary results from combining in situ Bowen ratio energy balance (BREB) and
evapotranspiration (ET) measurements techniques with physically based remote sensing ET estimates determined
by the Atmosphere-Land Exchange Inverse (ALEXI) model. Evapotranspiration measurements
and ALEXI estimates were analysed in an agricultural area close to Polkovice, Czech Republic during 2015,
when a drought spell and intensive heatwaves appeared in the country. The BREB system was monitoring a
winter wheat (Triticum aestivum L.) field (~26 ha) while the ALEXI pixel (~5 km resolution) covered a wide
range of crops, including mainly winter wheat, spring barley, and winter rape. The study results showed that,
although the applied methods work at different spatial scales (field vs. landscape), their combination can provide
further insights into ET at both scales. For instance, such approach can be used to identify whether a specific
ecosystem investigated in situ contributes to cooling or warming of the landscape.
Permanent Link: http://hdl.handle.net/11104/0280302