Soil solutions - Capesterre, La Digue

We collect soil solutions using lysimeters (Soil Moisture Inc., Santa Barbara, CA) placed at various depths in the soil (ranging from 15 to 1250 cm deep). A lysimeter consists of a porous ceramic candle mounted on a 5 cm diameter tube, made watertight with a rubber stopper equipped with a capillary pump. A vacuum of 60-70 centibars is created inside the lysimeter, allowing the aspiration of free soil water into the tube. Water is collected after 3-4 weeks of aspiration. The samples are brought back to the observatory to be filtered (using a 0.2 ?m cellulose acetate filter), conditioned, and analyzed. For each sample, we prepare: a vial for the analysis of anions (Cl-, NO3-, SO42-), a vial for the analysis of cations (acidified sample with HNO3; Na+, K+, Ca2+, Mg2+), and a vial for the analysis of major elements. Depending on the ongoing research projects, other vials may be prepared for specific analyses.

revisionApr 9, 2026creationJan 28, 2026publicationApr 4, 2026

Overview

Lineage

Dataset acquired by ObsERA. The dataset is broadcasted unmodified to Theia/OZCAR information system.

Links

Downloads

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Geolinks

• No links available

Others

• Theia/OZCAR dataset description
• Link to Original Record [in-situ.theia-land.fr]
  This metadata comes from in-situ.theia-land.fr

Contacts

OZCAR-RI OBSERA

• touvier@ipgp.fr

OZCAR-RI OBSERA

• dessert@ipgp.fr

OZCAR-RI OBSERA

• touvier@ipgp.fr

Keywords

Data Acquisition

Duration

pH

observable property

manual observation

Fixed Observation Stations

Ca⁺⁺

Cl⁻

Conductivity at 25°C

HCO₃⁻

K⁺

Mg⁺⁺

NO₃⁻

Na⁺

SO₄⁻⁻

Sampling Depth

Tropical, rainforest

Extrusive volcanic rocks (traps exepted)

Environmental monitoring facilities

CDS THEIA-OZCAR

Constraints

Other restrictions

Use limitations

No conditions to access and use

Other restrictions

no limitations to public access

No conditions apply to access and use