Picture of boy being examining by doctor at a tuberculosis sanatorium

Understanding our future through Open Access research about our past...

Strathprints makes available scholarly Open Access content by researchers in the Centre for the Social History of Health & Healthcare (CSHHH), based within the School of Humanities, and considered Scotland's leading centre for the history of health and medicine.

Research at CSHHH explores the modern world since 1800 in locations as diverse as the UK, Asia, Africa, North America, and Europe. Areas of specialism include contraception and sexuality; family health and medical services; occupational health and medicine; disability; the history of psychiatry; conflict and warfare; and, drugs, pharmaceuticals and intoxicants.

Explore the Open Access research of the Centre for the Social History of Health and Healthcare. Or explore all of Strathclyde's Open Access research...

Image: Heart of England NHS Foundation Trust. Wellcome Collection - CC-BY.

Measurement of methane and carbon dioxide fluxes from peatland ecosystems by the conditional-sampling technique

Beverland, I J and Moncrieff, J B and Oneill, D H and Hargreaves, K J and Milne, R (1996) Measurement of methane and carbon dioxide fluxes from peatland ecosystems by the conditional-sampling technique. Quarterly Journal of the Royal Meteorological Society, 122 (532). pp. 819-838. ISSN 0035-9009

Full text not available in this repository. Request a copy from the Strathclyde author

Abstract

The conditional sampling method was used to measure methane (CH4) and carbon dioxide (CO2) fluxes from peatlands in northern Scotland. Preliminary data were obtained using a simple system. Subsequent automation made continuous nux-measurements possible. Observed CH4 fluxes were in the range -70 to +110 mu mol m(-2)h(-1) with a mean flux of 23 mu mol m(-2)h(-1). Peak photosynthetic CO2 fluxes were in the range -10 to -30 mmol m(-2) h(-1). Nocturnal respiration ranged from 0 to +10 mmol m(-2) h(-1). The conditional sampling observations showed reasonable agreement with measurements of flux by eddy-covariance, gradient and aircraft methods. Error analyses and laboratory tests were conducted to determine the precision of the flux-measurement system. The dominant error was associated with the determination of the mixing-ratio difference in conditionally-sampled updraught and downdraught air. The standard error of the difference for CH4 was typically 0.15 ng g(-1) (0.3 parts in 10(9) (p.p.b.))using a careful high-repetition sampling strategy with a modified gas chromatographic/flame ionization detector system. Under typical daytime atmospheric conditions this corresponded to a standard error in the flux measurement of 10 mu mol m(-2)h(-1), which is consistent with field observations. The empirical beta factor in the conditional sampling equation was found to be insensitive to changes in turbulence intensity and atmospheric stability. Simple upscaling models were used to estimate annual carbon-fluxes to Great Britain's peatlands of -0.5 Mt of carbon in the form of CO2 and 18 kt in the form of methane.