Isotopic composition of water in fog, rain, throughfall and stemflow in the Monte Verde, Costa Rica

Fog deposition, precipitation, throughfall and stemflow were measured in a windward tropical montane cloud forest near Monteverde, Costa Rica, for a 65-day period during the dry season of 2003. Net fog deposition was measured directly using the eddy covariance (EC) method and it amounted to 1.2 ± 0.1 mm/day (mean ± standard error). Fog water deposition was 5–9% of incident rainfall for the entire period, which is at the low end of previously reported values. Stable isotope concentrations (d18O and d2H) were determined in a large number of samples of each water component. Mass balance-based estimates of fog deposition were 1.0 ± 0.3 and 5.0 ± 2.7 mm/day (mean ± SE) when d18O and d2H were used as tracer, respectively. Comparisons between direct fog deposition measurements and the results of the mass balance model using d18O as a tracer indicated that the latter might be a good tool to estimate fog deposition in the absence of direct measurement under many (but not all) conditions. At 506 mm, measured water inputs over the 65 days (fog plus rain) fell short by 46 mm compared to the canopy output of 552 mm (throughfall, stemflow and interception evaporation). This discrepancy is attributed to the underestimation of rainfall during conditions of high wind.

Swiss National Science Foundation project 2100-068051.02

Supplement to: Schmid, Simone; Burkard, Reto; Frumau, K F A; Tobón, C; Bruijnzeel, L Adrian; Siegwolf, Rolf T E; Eugster, Werner (2011): Using eddy covariance and stable isotope mass balance techniques to estimate fog water contributions to a Costa Rican cloud forest during the dry season. Hydrological Processes, 25, 429-437

Identifier
DOI https://doi.org/10.1594/PANGAEA.735614
PID https://hdl.handle.net/10013/epic.34719.d001
Related Identifier https://doi.org/10.1002/hyp.7739
Related Identifier https://hdl.handle.net/10013/epic.34606.d001
Metadata Access https://ws.pangaea.de/oai/provider?verb=GetRecord&metadataPrefix=datacite4&identifier=oai:pangaea.de:doi:10.1594/PANGAEA.735614
Provenance
Creator Schmid, Simone; Burkard, Reto; Frumau, K F A; Tobón, C; Bruijnzeel, L Adrian; Siegwolf, Rolf T E ORCID logo; Eugster, Werner ORCID logo
Publisher PANGAEA
Publication Year 2011
Rights Creative Commons Attribution 3.0 Unported; https://creativecommons.org/licenses/by/3.0/
OpenAccess true
Representation
Resource Type Supplementary Dataset; Dataset
Format text/tab-separated-values
Size 3600 data points
Discipline Earth System Research
Spatial Coverage (-84.801 LON, 10.359 LAT); Monte Verde, Costa Rica
Temporal Coverage Begin 2003-02-20T17:30:00Z
Temporal Coverage End 2003-05-21T15:30:00Z