Fluxes of dissolved carbon dioxide and inorganic carbon from an upland peat catchment: implications for soil respiration

Worrall, Fred; Burt, Tim; Adamson, J.

doi:10.1007/s10533-004-1717-2

Cited by 60 publications

(44 citation statements)

References 41 publications

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“…Ditchwater and soil water were therefore barely fed with TC and CH 4 through seepaging water. Discharge in this controlled area was low compared to other, for example mountainous and uncontrolled areas, where the run off component forms a more important role of washing down of carbon from the system (Hope et al, 2004;Worrall et al, 2005;Ding et al, 2005).…”

Section: Discussionmentioning

confidence: 79%

The full greenhouse gas balance of an abandoned peat meadow

et al. 2007

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Abstract. Globally, peat lands are considered to be a sink of CO 2 , but a source when drained. Additionally, wet peat lands are thought to emit considerable amounts of CH 4 and N 2 O. Hitherto, reliable and integrated estimates of emissions and emission factors for this type of land cover have been lacking and the effects of wetland restoration on methane emissions have been poorly quantified. In this paper we estimate the full greenhouse gas (GHG) balance of a restored natural peat land by determining the fluxes of CO 2 , CH 4 and N 2 O through atmosphere and water, while accounting for the different Global Warming Potentials (GWP's).The site is an abandoned agricultural peat meadow, which has been converted into a wetland nature reserve ten years ago, after which the water level was raised. GHG fluxes were measured continuously with an eddy covariance system (CO 2 ) and flux chamber measurements (CH 4 land and water. CO 2 emission has decreased significantly as result of the raised water table, while CH 4 fluxes have increased. In GWP's the area was a small net GHG sink given as CO 2 -equiv. of −86 g m −2 yr −1 (over a 100-year period).

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Section: Discussionmentioning

confidence: 79%

The full greenhouse gas balance of an abandoned peat meadow

et al. 2007

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“…There are no calcium concentration data available here; however, Worrall and Burt (2005a) have shown that a strong linear correlation exists between EpCO 2 as calculated based upon pH, alkalinity and stream temperature alone and that calculated using calcium concentration data. This strong linear correlation has been observed in three different catchments (Worrall et al, 2005) Dissolved CO 2 is converted to units of milligrams of carbon per litre.…”

Section: Estimating Stream Dissolved Comentioning

confidence: 79%

Reconstructing long-term records of dissolved CO2

Worrall

Burt

2005

Hydrol. Process.

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Abstract:The dissolved CO 2 concentration of stream waters is an important component of the terrestrial carbon cycle. This study reconstructs long-term records of dissolved CO 2 concentration for the outlets of two large catchments (818 and 586 km 2 ) in northern England. The study shows that:1. The flux of dissolved CO 2 from the catchments (as carbon per catchment area), when adjusted for that which would be carried by the river water at equilibrium with the atmosphere, is between 0 and 0Ð39 t km 2 year 1 for the River Tees and between 0 and 0Ð65 t km 2 year 1 for the River Coquet. 2. The flux of dissolved CO 2 is closely correlated with dissolved organic carbon (DOC) export and is unrelated to dissolved CO 2 export from the headwaters of the study catchments. 3. The evasion rate of CO 2 from the rivers (as carbon per stream area) is between 0Ð0 and 1Ð49 kg m 2 year 1 , and calculated in-stream productions of CO 2 are estimated as between 0Ð5 and 2Ð5% of the stream evasion rate. 4. By mass balance, it is estimated that 8% of the annual flux of DOC is lost within the streams of the catchment.The study shows that the loss of CO 2 from the streams of the Tees catchment is between 3Ð1 and 7Ð5 kt year 1 (as carbon) for the River Tees, which is the same order as annual CH 4 flux from peats within the catchment and approximately 50% of the net CO 2 exchange to the peats of the catchment.

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“…Worrall et al (2005) have shown that the approach of Jones and Mulholland (1998) gives comparable results to those of extrapolation from soil temperature within a peat soil catchment. This present study calculates the excess dissolved CO 2 concentration at emergence as described below.…”

Section: Surface Exchange Of Comentioning

confidence: 81%

“…The rating curve for the Trout Beck gauging station was used to estimate stream depth and, given the total stream length within the catchment it was assumed that the CO 2 evaded the stream at the mid-length point. The in-stream production was estimated following the method of Worrall et al (2005) based upon measurements of biochemical oxygen demand (BOD) across a range of low conditions within the catchment.…”

Section: Dissolved Comentioning

confidence: 99%

The multi-annual carbon budget of a peat-covered catchment

Worrall

Burt

Rowson

et al. 2009

Science of The Total Environment

107

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This study estimates the complete carbon budget of an 11.4 km 2 peat-covered catchment in Northern England. The budget considers both fluvial and gaseous carbon fluxes and includes estimates of particulate organic carbon (POC); dissolved organic carbon (DOC); excess dissolved CO 2 ; release of methane (CH 4 ); net ecosystem respiration of CO 2 ; and uptake of CO 2 by primary productivity. All components except CH 4 were measured directly in the catchment and annual carbon budgets were calculated for the catchment between 1993 and 2005 using both extrapolation and interpolation methods. The study shows that: Over the 13 year study period the total carbon balance varied between a net sink of − 20 to − 91 Mg C/km 2 /yr. The biggest component of this budget is the uptake of carbon by primary productivity (− 178 Mg C/km 2 /yr) and in most years the second largest component is the loss of DOC from the peat profile (+39 Mg C/km 2 /yr). Direct exchanges of C with the atmosphere average − 89 Mg C/km 2 /yr in the catchment. Extrapolating the general findings of the carbon budget across all UK peatlands results in an approximate carbon balance of − 1.2 Tg C/ yr (±0.4 Pg C/yr) which is larger than previously reported values. Carbon budgets should always be reported with a clear statement of the techniques used and errors involved as this is significant when comparing results across studies.

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Fluxes of dissolved carbon dioxide and inorganic carbon from an upland peat catchment: implications for soil respiration

Cited by 60 publications

References 41 publications

The full greenhouse gas balance of an abandoned peat meadow

The full greenhouse gas balance of an abandoned peat meadow

Reconstructing long-term records of dissolved CO2

The multi-annual carbon budget of a peat-covered catchment

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