Identifying DOC gains and losses during a 20-year record in the Trout Beck catchment, Moor House, UK

Moody, Catherine; Worrall, Fred; Burt, Tim

doi:10.1016/j.ecolind.2015.11.033

Cited by 9 publications

(9 citation statements)

References 44 publications

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“…In our study, the annual mean concentration, 15.4 mg L −1 , was in the middle of the range of concentrations reported from boreal regions, from 1.5 to 35.3 mg L −1 (Yates et al, 2016;Avagyan et al, 2016). The DOC yield from our catchment was estimated at 4.7 g m −2 yr −1 , which was in the lower range of estimates reported for a permafrost region, which ranged from 1 to 35 g m −1 yr −1 (Fraser et al, 2001;Dinsmore et al, 2010;Moody et al, 2016). The mean DOC yield in our catchment was less than the net DOC loss reported from UK lands (2.1-11.5 g m −2 yr −1 ) (Moody et al, 2013), but it was higher than in Finnish rivers (3.5 g m −2 yr −1 ) (Räike et al, 2012), in the Yukon River in Alaska (1.4-3.7 g m −2 yr −1 ) and in central Siberian rivers (2.8-4.7 g m −2 yr −1 ) (Prokushkin et al, 2011).…”

Section: Doc Concentrations and Yieldmentioning

confidence: 40%

Hydrological processes and permafrost regulate magnitude, source and chemical characteristics of dissolved organic carbon export in a peatland catchment of northeastern China

Guo

Song

Tan

et al. 2018

Hydrol. Earth Syst. Sci.

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Abstract. Permafrost thawing in peatlands has the potential to alter the catchment export of dissolved organic carbon (DOC), thus influencing the carbon balance and cycling in linked aquatic and ocean ecosystems. Peatlands along the southern margins of the Eurasian permafrost are relatively underexplored despite the considerable risks associated with permafrost degradation due to climate warming. This study examined dynamics of DOC export from a permafrost peatland catchment located in northeastern China during the 2012 to 2014 growing seasons. The estimated annual DOC loads varied greatly between 3211 and 19 022 kg yr −1 , with a mean DOC yield of 4.7 g m −2 yr −1 . Although the estimated DOC yield was in the lower range compared with other permafrost regions, it was still significant for the net carbon balance in the studied catchment. There were strong linkages between daily discharge and DOC concentrations in both wet and dry years, suggesting a transport-limited process of DOC delivery from the catchment. Discharge explained the majority of both seasonal and interannual variations of DOC concentrations, which made annual discharge a good indicator of total DOC load from the catchment. As indicated by three fluorescence indices, DOC source and chemical characteristics tracked the shift of flow paths during runoff processes closely. Interactions between the flow path and DOC chemical characteristics were greatly influenced by the seasonal thawing of the soil active layer. The deepening of the active layer due to climate warming likely increases the proportion of microbial-originated DOC in baseflow discharge.

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Section: Doc Concentrations and Yieldmentioning

confidence: 40%

Hydrological processes and permafrost regulate magnitude, source and chemical characteristics of dissolved organic carbon export in a peatland catchment of northeastern China

Guo

Song

Tan

et al. 2018

Hydrol. Earth Syst. Sci.

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“…[] measured a removal rate of 35% across the catchment, and Moody et al . [] calculated a 10 year average loss rate across the catchment as 29% at an average in‐stream residence time of 4.33 h, i.e., lower removal rates than predicted by the approach above. Given the removal rate predicted for the DOC, then it may be that C:P does increase through the catchment, in which case it would imply that C:P ratio of DOM does increase through the catchment.…”

Section: Discussionmentioning

confidence: 99%

The total phosphorus budget of a peat‐covered catchment

et al. 2016

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Although many studies have considered the carbon or greenhouse gas budgets of peat ecosystems, only a few have considered the nutrient budget of peat soils, and this, in turn, has limited the ability of studies to consider the impact of changes in climate and atmospheric deposition on the phosphorus budget of a peat soil. This study considered the total phosphorus (P) budget of an upland peat‐covered catchment over the period 1993 to 2012. The study has shown (i) total atmospheric deposition of phosphorus varied from 62 to 175 kg P/km2/yr; (ii) the carbon:phosphorus ratio of the peat profile declines significantly from values in the litter layer (C:P = 1326) to approximately constant at 30 cm depth (C:P = 4240); (iii) the total fluvial flux of phosphorus varied from 49 to 111 kg P/km2/yr, of which between 45 and 77% was dissolved P; and (iv) the total phosphorus sink varied from −5.6 to +71.7 kg P/km2/yr with a median of +29.4 kg P/km2/yr, which is within the range of the estimated long‐term accumulation rate of phosphorus in the peat profile of between 3 and 32 kg P/km2/yr. The phosphorus budget of the peat ecosystem relies on rapid recycling near the soil surface, and this means that any vegetation management may critically deprive the ecosystem of this nutrient.

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“…In our study, the annual mean concentration, 15.4 mg L −1 , was in the middle of the range of concentrations reported from boreal regions, from 1.5 to 35.3 mg L −1 (Yates et al, 2016;Avagyan et al, 2016). The DOC yield from our catchment was estimated at 4.7 g m −2 yr −1 , which was in the lower range of estimates reported for a permafrost region, which ranged from 1 to 35 g m −1 yr −1 (Fraser et al, 2001;Dinsmore et al, 2010;Moody et al, 2016). The mean DOC yield in our catchment was less than the net DOC loss reported from UK lands (2.1-11.5 g m −2 yr −1 ) (Moody et al, 2013), but it was higher than in Finnish rivers (3.5 g m −2 yr −1 ) (Räike et al, 2012), in the Yukon River in Alaska (1.4-3.7 g m −2 yr −1 ) (Striegl et al, 2007) and in central Siberian rivers (2.8-4.7 g m −2 yr −1 ) (Prokushkin et al, 2011).…”

Section: Doc Concentrations and Yieldmentioning

confidence: 44%

Response to the comments of reviewer #1

Guo¹

2017

Preprint

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Identifying DOC gains and losses during a 20-year record in the Trout Beck catchment, Moor House, UK

Cited by 9 publications

References 44 publications

Hydrological processes and permafrost regulate magnitude, source and chemical characteristics of dissolved organic carbon export in a peatland catchment of northeastern China

Hydrological processes and permafrost regulate magnitude, source and chemical characteristics of dissolved organic carbon export in a peatland catchment of northeastern China

The total phosphorus budget of a peat‐covered catchment

Response to the comments of reviewer #1

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