DOI: 10.16904/envidat.473
title: Water isotope signatures in Swiss forest ecosystems in 2021 and 2022

description: The isotope composition of different forest water pools was analyzed at 10 sites of the Long-term Forest Ecosystem Research programme in 2021 and 2022. The sampling was done during the vegetation season and included fortnightly xylem water samples taken by stem increment cores and each year 3 bulk soil water sampling campaigns (in April, June, September of 2021 and 2022). Both sample types were cryogenically extracted at WSL and analyzed on a Picarro 2140 with Micro-Combustion-Module. Gravimetric water content in both sample types was computed based on pre-and post-extraction weights. In addition to xylem and bulk soil waters, we analyzed the isotope composition of soil solution from a suction cup lysimeters in three soil depths 0, 15, 50, 80 cm and precipitation from samplers below the canopy and outside of the forest, all collected fortnightly from collection periods of varying length (longest from 2017-2022).
Precipitation samples are further described [here](https://www.doi.org/10.16904/envidat.lwf.15). Lysimeter samples are described further [here](https://www.doi.org/10.16904/envidat.lwf.28).
description: Resource Title: out2024-01-07_column-headers__s71t_.csv
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 Description: Column descriptions for soil solution, deposition, xylem and bulk soil samples.
description: Resource Title: out2024-01-07-deposition-all_isotope_samples_s71t__rounded.csv
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 Description: Water isotopic signature of deposition samples.
description: Resource Title: out2024-01-07-bulksoil-all_isotope_samples_s71t__rounded.csv
 Size: 376212 bytes
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 Description: Water isotope signatures and gravimetric water content of bulk soil samples.
description: Resource Title: out2024-01-07-Xylem-all_isotope_samples_s71t__rounded.csv
 Size: 225860 bytes
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 Description: Water isotope signatures and gravimetric water content of xylem samples.
description: Resource Title: out2024-01-07-soilsolution-all_isotope_samples_s71t__rounded.csv
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 Description: Water isotope signatures of soil solution samples.
description: Resource Title: out2024-01-07-bulksoil-overview_s71t_.png
 Size: 813027 bytes
 Format: image/png
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 Description: Overview of most bulk soil water isotopic signatures.
description: Resource Title: out2024-01-07-deposition-overview_s71t_.png
 Size: 1559360 bytes
 Format: image/png
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 Description: Overview of most deposition water isotopic signatures.
description: Resource Title: out2024-01-07-soilsolution-overview_s71t_.png
 Size: 1705534 bytes
 Format: image/png
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 Description: Overview of most soil solution water isotopic signatures.
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 Size: 792919 bytes
 Format: image/png
 URL: https://www.envidat.ch/dataset/c6b075d0-ad47-404b-91a0-ca66b7ce433b/resource/81be7990-7d99-474b-8e6a-833a4198041d/download/out2024-01-07-xylem-overview_s71t_.png
 Description: Overview of most xylem water isotopic signatures.