The study was conducted in a peri-urban area SE of Berlin, Germany, on the grounds of the Leibniz-Institute of Freshwater Ecology and Inland Fisheries (IGB). The study site is located roughly 200 m north of Lake Müggelsee, 38 m.a.s.l. It is surrounded by buildings (on average 10 m distance) and vegetation is a mosaic of extensive grassland and mature trees (~30-100 years old). Groundwater levels directly at the site are ~4 m below the ground surface (Umweltatlas Berlin, 2020) with limited annual variability (< 0.15 m). The study period was from April 1st to November 1st 2022 (i.e. a full vegetative period). Climate data (air temperature, precipitation amount, wind speed and direction, relative humidity, air pressure, global radiation) were accessed from the rooftop of IGB ~300 m away. On-site, we measured precipitation at the open grassland and relative humidity at the maple tree stem at 2 m height in south-east direction. Stable water isotopes of atmospheric water vapour (δv) and plant xylem water (δxyl) were measured in situ real-time and sequentially (automatic switch of tube) via cavity ring-down spectroscopy.
Meta-data file is attached.
More details on methods and study site to be found in the publications:
Ring, A.-M., Tetzlaff, D., Dubbert, M., Freymueller, J., and Soulsby, C. (2024): Assessing the impact of drought on water cycling in urban trees via in-situ isotopic monitoring of plant xylem water. Journal of Hydrology. - 633(2024), Art. 131020.
http://dx.doi.org/10.1016/j.jhydrol.2024.131020
Ring, A.-M., Tetzlaff, D., Birkel, C., and Soulsby, C. (2025), in review: Sub-daily dynamics of urban tree xylem water and ambient vapor. Hydrological and Earth System Sciences. Preprint.
https://doi.org/10.5194/egusphere-2025-1444
Birkel, C., Tetzlaff, D., Ring, A.-M., and Soulsby, C. (2025): Does high resolution in situ xylem and atmospheric vapor isotope data help improve modelled estimates of ecohydrological partitioning?. Agricultural and Forest Meteorology. 365(2025), 110467.
https://doi.org/10.1016/j.agrformet.2025.110467
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