Peacock, Michael
- Bangor University
Abstract
Absorbance in the UV or visible spectrum (UV-vis) is commonly used as a proxy for DOC concentrations in waters draining upland catchments. To determine the appropriateness of different UV-vis measurements we used surface and pore water samples from two Welsh peatlands in four different experiments: (i) an assessment of single wavelength proxies (1 nm increments between 230-800 nm) for DOC concentration demonstrated that 254 nm was more accurate than 400 nm. The highest R-2 values between absorbance and DOC concentration were generated using 263 nm for one sample set (R-2 = 0.91), and 230 nm for the other three sample sets (respective R-2 values of 0.86, 0.81, and 0.93). (ii) A comparison of different DOC concentration proxies, including single wavelength proxies, a two wavelength model, a proxy using phenolic concentration, and a proxy using the area under a UV spectrum at 250-350 nm. It was found that both a single wavelength proxy (
Published in
Environmental Science: Processes and Impacts
2014, volume: 16, number: 6, pages: 1445-1461
Publisher: ROYAL SOC CHEMISTRY
SLU Authors
Evans, Christopher
- Centre for Ecology and Hydrology (CEH)
UKÄ Subject classification
Environmental Sciences
Publication identifier
- DOI: https://doi.org/10.1039/c4em00108g
Permanent link to this page (URI)
https://res.slu.se/id/publ/87822