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A 19-year long energy budget of an upland peat bog, northern England

Worrall, F.; Burt, T.P.; Clay, G.D.; Moody, C.S.

A 19-year long energy budget of an upland peat bog, northern England Thumbnail


T.P. Burt

G.D. Clay

C.S. Moody


This study has estimated the long term evaporation record for a peat covered catchment in northern England. In this study, 19 years of daily evaporation were estimated for rain-free periods using White’s methods. Net radiation was measured over the study period; soil heat flux was calculated from temperature profiles; and sensible heat flux was calculated assuming the energy budget was closed. The calculated time series was compared to available environmental information on the same time step and over the same time period. Over a 19-year period it was possible to calculate 1662 daily evaporation rates (26% of the period). The study showed that the energy flux to net primry productivity was a small, long-term sink of energy but this sink was a virtue of high carbon accumulation in peat catchments: in catchments where there is no long-term dry matter accumulation, net primary productivity must be a small net source of energy. The study showed that evaporation increased over the study period whilst sensible heat flux significantly declined, reflecting an increased use of sensible heat energy to meet evaporative demand. The relatively small change in evaporative flux compared to other energy fluxes suggests that this system is a “near-equilibrium” system and not a “far-from-equilibrium” system.


Worrall, F., Burt, T., Clay, G., & Moody, C. (2015). A 19-year long energy budget of an upland peat bog, northern England. Journal of Hydrology, 520, 17-29.

Journal Article Type Article
Acceptance Date Nov 7, 2014
Publication Date Jan 1, 2015
Deposit Date May 1, 2015
Publicly Available Date May 1, 2015
Journal Journal of Hydrology
Print ISSN 0022-1694
Publisher Elsevier
Peer Reviewed Peer Reviewed
Volume 520
Pages 17-29
Keywords Evaporation, Sensible heat flux, Soil heat flux, Net radiation, Heat sink, Evaporative cooling.


Accepted Journal Article (475 Kb)

Copyright Statement
NOTICE: this is the author’s version of a work that was accepted for publication in Journal of Hydrology. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Journal of Hydrology, 520, January 2015, 10.1016/j.jhydrol.2014.11.019.

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