ABSTRACT:

This dataset contains surface CO2 and CH4 concentrations from headwater stream in the monsoonal north of Australia. This data was collected as part of the field campaigns for "Hydrology regulates sources and sinks of carbon dioxide and methane in a tropical headwater stream" but was never used directly in the manuscript or published in the supporting data. The subsection "Spatial Sampling" in the manuscript details a headspace method used to measure gas concentration in shallow subsurface flows– the same headspace method was used to collect these gas samples from the stream channel. These samples were collected from the stream surface (depth ~10cm or less).

See the publication for more info:
Rexroade, A.T., Wallin, M.B., Ulloa-Cedamanos, F., Taillardat, P. and Duvert, C. (2026), Hydrology regulates sources and sinks of carbon dioxide and methane in a tropical headwater stream. Limnol Oceanogr, 71: e70372. https://doi.org/10.1002/lno.70372

ABSTRACT:

This dataset was collected as part of the field campaigns for "Measuring Gas Transfer Velocity in a Steep Tropical Stream: Method Evaluation and Implications for Upscaling" but was never used in the manuscript or published in the supporting data. Site coordinates and names corresponds with the site names in the manuscript. These samples were collected at the downstream end of each study reach at the surface, before any manipulation or tracer gas was diffused into the stream (e.g. they represent natural conditions). Samples were collected using a headspace method, detailed in section 2.4.

See the publication for more info:
Rexroade, A. T., Wallin, M. B., & Duvert, C. (2025). Measuring gas transfer velocity in a steep tropical stream: Method evaluation and implications for upscaling. Journal of Geophysical Research: Biogeosciences, 130, e2024JG008420. https://doi.org/10.1029/2024JG008420