©2020 Biological and Chemical Oceanography Data Management Office.Funded by the U.S. National Science Foundation
©2020 Biological and Chemical Oceanography Data Management Office.This project addresses carbon conversion processes in sandy beaches. To assess gas concentration gradients between the atmsphere and the beach sediment, vertical gas concentration profiles were measured below the beach sediment surface. Gas (custom probes) and temperature probes (PT100) were placed at 2.5 cm above the sediment and at -5, -15 and -25 cm below the sediment surface. Pore gas was extracted from the sediment using a syringe pump (150 ml max. volume). Gas concentrations were measured ...
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Study Site
The study site used in this project is an exposed carbonate sand beach located at the Public Beach in Marathon/Florida Keys (24 43.807 N, 081 00.056 W). The beach sand is composed of porous biogenic carbonate grains. Air temperature ranges from 14 to 38˚C, water temperature from 22 to 31˚C. The tidal range is 0.6 m.
Measurements
Gas (custom probe, 70 cm long, 5 mm diameter) and temperature probes (PT100) were placed at 5 cm above the sediment and at -5, -15 and -25 cm below the sediment surface. Pore gas was extracted from the sediment using a syringe pump (150 ml max. volume). After extraction of gas from the sediment, a set of stopcocks was used to switch the flow path of the syringe pump from the respective probe to a Pyroscience flow-through O2 optode installed in series with a Licor840A gas analyzer, where the CO2 concentrations were measured.
Huettel, M. (2025) Vertical gas concentrations in exposed carbonate sand beach in Marathon, FL measured on Jun 6th, 2022. Biological and Chemical Oceanography Data Management Office (BCO-DMO). (Version 1) Version Date 2025-11-12 [if applicable, indicate subset used]. http://lod.bco-dmo.org/id/dataset/986654 [access date]
Terms of Use
This dataset is licensed under Creative Commons Attribution 4.0.
If you wish to use this dataset, it is highly recommended that you contact the original principal investigators (PI). Should the relevant PI be unavailable, please contact BCO-DMO (info@bco-dmo.org) for additional guidance. For general guidance please see the BCO-DMO Terms of Use document.