Details

Autor(en) / Beteiligte

• Moonen, Robbert P. J
• Adnew, Getachew A
• Hartogensis, Oscar K
• Vilà-Guerau de Arellano, Jordi
• Bonell Fontas, David J
• Röckmann, Thomas

Titel

Data treatment and corrections for estimating H.sub.2O and CO.sub.2 isotope fluxes from high-frequency observations

Ist Teil von

• Atmospheric measurement techniques, 2023-12, Vol.16 (23), p.5787

Ort / Verlag

Copernicus GmbH

Erscheinungsjahr

2023

Quelle

EZB Electronic Journals Library

Beschreibungen/Notizen

• Current understanding of land-atmosphere exchange fluxes is limited by the fact that available observational techniques mainly quantify net fluxes, which are the sum of generally larger, bidirectional fluxes that partially cancel out. As a consequence, validation of gas exchange fluxes applied in models is challenging due to the lack of ecosystem-scale exchange flux measurements partitioned into soil, plant, and atmospheric components. One promising experimental method to partition measured turbulent fluxes uses the exchange-process-dependent isotopic fractionation of molecules like CO.sub.2 and H.sub.2 O. When applying this method at a field scale, an isotope flux ([delta] flux) needs to be measured. Here, we present and discuss observations made during the LIAISE (Land surface Interactions with the Atmosphere over the Iberian Semi-arid Environment) 2021 field campaign using an eddy covariance (EC) system coupled to two laser spectrometers for high-frequency measurement of the isotopic composition of H.sub.2 O and CO.sub.2 . This campaign took place in the summer of 2021 in the irrigated Ebro River basin near Mollerussa, Spain, embedded in a semi-arid region.