Measurement report: Spatial variability of northern Iberian rainfall stable isotope values - Investigating atmospheric controls on daily and monthly timescales ...

• Main Authors: Moreno, Ana, Iglesias, Miguel, Azorin-Molina, Cesar, Pérez-Mejías, Carlos, Bartolomé, Miguel, Sancho, Carlos, Stoll, Heather, Cacho, Isabel, Frigola, Jaime, Osácar, Cinta, Muñoz, Antonio, Delgado-Huertas, Antonio, Bladé, Ileana, Vimeux, Françoise
• Format: Article in Journal/Newspaper
• Language: English
• Published: ETH Zurich 2021
• Subjects: North Atlantic
• Online Access: https://dx.doi.org/10.3929/ethz-b-000495423; http://hdl.handle.net/20.500.11850/495423

For the first time, this article presents a large dataset of precipitation isotopic measurements (δ18Op and δ2Hp) sampled every day or 2d from seven sites on a west-to-east transect across northern Spain for 2010-2017. The main aim of this study is to (1) characterize the rainfall isotopic variability in northern Spain at daily and monthly timescales and (2) assess the principal factors influencing rainfall isotopic variability. The relative role of air temperature and rainfall in determining the stable isotope composition of precipitation changes along the west-to-east transect, with air temperature being highly correlated with δ18Op at daily and monthly timescales, while a few sites along the transect show a significant negative correlation with precipitation. The highest air temperature-δ18Op dependency is found for a station located in the Pyrenees. Frontal systems associated with North Atlantic cyclones are the dominant mechanism inducing precipitation in this region, particularly in winter. This study ... : Atmospheric Chemistry and Physics, 21 (13) ...