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Hinton, M J; Schiff, Sherry L.; English, Michael

doi:10.1023/a:1005779711821

Cited by 264 publications

(83 citation statements)

References 24 publications

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“…The lines for components 1 and 12 were fitted using the R function smooth.spline and 3 degrees of freedom. The line for DOC concentrations was fitted using the R function lowess with a smoothing span of f = 0.5. in runoff have been related to changing water flow paths under high-flow, draining different compartments than under baseflow conditions (Hood et al, 2006). In the Lehstenbach catchment, the quality of DOC, concentration range and groundwater dynamics point to the riparian wetland soils as the main source of DOC in runoff under high-flow and also under low-flow conditions, corroborating previous studies (Jaffé et al, 2008;Inamdar et al, 2012).…”

Section: Range Origin and Mobilization Of Doc In Runoffsupporting

confidence: 85%

“…Hornberger et al, 1994;Butturini et al, 2006;Jeong et al, 2012). This was also reported in studies where DOC was found to originate mainly from riparian wetland soils (McGlynn and McDonnell, 2003;Hood et al, 2006). Minding the proposed Transmissivity Feedback (Bishop et al, 2004) for DOC exports and highest DOC concentrations in the riparian wetland soils, this would also be expected for our catchment.…”

Section: Temporal Dynamics Of Doc In Runoffsupporting

confidence: 84%

“…This can be attributed to the large differences in DOC concentrations in the two dominant flow components contributing to individual discharge events, i.e. groundwater versus shallow groundwater and surface runoff from riparian wetland soils (McGlynn and McDonnell, 2003;Hood et al, 2006). Ludwig et al (1996) related the DOC fluxes to drainage intensity, basin slope, and the amount of carbon stored in soils.…”

Section: Introductionmentioning

confidence: 99%

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Concentrations and fluxes of dissolved organic carbon in runoff from a forested catchment: insights from high frequency measurements

et al. 2013

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Concentrations of dissolved organic carbon (DOC) in runoff from catchments are often subject to substantial short-term variations. The aim of this study was to identify the compartmental sources of DOC in a forested catchment and the causes for short-term variations in runoff. Furthermore, we investigated the implication of short-term variations for the calculation of annual runoff fluxes. High frequency measurements (30 min intervals) of DOC in runoff, of discharge and groundwater table were conducted for one year in the 4.2 km2 forested Lehstenbach catchment, Germany. Riparian wetland soils represent about 30% of the catchment area. The quality of DOC was investigated by three dimensional fluorescence excitation-emission matrices in samples taken from runoff, deep groundwater and shallow groundwater from the riparian wetland soils. The concentrations of DOC in runoff were highly variable at an hourly to daily time scale, ranging from 2.6 mg L−1 to 34 mg L−1 with an annual average of 9.2 mg L−1. The concentrations were positively related to discharge, with a counter clockwise hysteresis. Relations of DOC to discharge were steeper and the degree of hysteresis larger in the summer/fall than in the winter/spring period. Dynamics of groundwater table, discharge, DOC concentrations and DOC quality parameters indicated that DOC in runoff originated mainly from the riparian wetland soils, both under low and high flow conditions. The annual export of DOC from the catchment was 84 kg C ha−1 yr−1 when calculated from the high frequency measurements. If the annual export was calculated by simulated samplings of >2 days intervals substantial deviations resulted. Predicted changes in precipitation and discharge patterns as well as generally increasing temperatures likely will cause raising DOC exports from this catchment

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Section: Range Origin and Mobilization Of Doc In Runoffsupporting

confidence: 85%

Section: Temporal Dynamics Of Doc In Runoffsupporting

confidence: 84%

Section: Introductionmentioning

confidence: 99%

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Concentrations and fluxes of dissolved organic carbon in runoff from a forested catchment: insights from high frequency measurements

et al. 2013

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“…Allochthonous DOC is one of the largest organic carbon fluxes from catchments to aquatic systems (Hinton et al 1997(Hinton et al , 1998. Allochthonous DOC through its effects on microbial processes, plays an important role in driving metabolism, decomposition and food web dynamics at the ecosystem scale.…”

Section: Introduction To Special Issuementioning

confidence: 99%

Allochthonous dissolved organic carbon in river, lake and coastal systems: transport, function and ecological role

Mitrovic

Baldwin

2016

Mar. Freshwater Res.

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“…Whilst little data exists of DIC export during flood conditions, observations show both DOC and POC to be strongly influenced by discharge. For example, Eimers et al (2008) showed that single flood events can account for as much as 66% of the total annual DOC export in a temperate catchment, and several other studies suggest between 36% and > 50% of organic carbon export happens during flood conditions (e.g., Hinton et al 1997Hinton et al , 1998Clark et al 2007). The logistical challenges of accessing high order catchments is often significant, meaning that any instrument used for continuous monitoring must be easily human-portable and have minimal power requirements.…”

mentioning

confidence: 99%

CADICA: Continuous Automated Dissolved Inorganic Carbon Analyzer with application to aquatic carbon cycle science

Bass

Bird

Morrison

et al. 2012

Limnology & Ocean Methods

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Dissolved inorganic carbon (DIC) represents a significant component of both the terrestrial and oceanic carbon cycles. An instrument for the continuous and automated analysis of dissolved inorganic carbon in the field is described. The analyzer is designed to allow collection of high-resolution (sub hourly) DIC data over prolonged field deployments without the need for labor-intensive maintenance and monitoring. The instrument sequentially acidifies an aliquot of water in gas permeable tubing through which CO 2 diffuses into a gas tight chamber and is quantified by an infrared gas analyzer. The instrument is accurate to ± 0.04 mM with a detection limit of 0.01 mM. Comparisons with conventional head space equilibration techniques using mass spectrometry yielded a good correlation differing by 0.016 ± 0.014 mM. Deployment in a tropical estuary and freshwater rainforest catchment revealed the dynamic nature of inorganic carbon cycling in these aquatic systems. DIC concentration was found to track the mixing of fresh and salt water well in the tropical estuary (as indicated by conductivity measurements), and comprised a significant component of dissolved carbon export from the estuary catchment. DIC totalled 24 ± 6% of the total carbon export from the rainforest catchment and varied between 0.04 and 0.13 mM over a 4-d period. The dynamic nature of DIC in the two environments illustrates the pressing need for the continuous and high-resolution data our instrument provides. AcknowledgmentsDesign and implementation of this instrument was funded as part of the Federation Fellowship 'environmental change, carbon cycling and human impact in the tropics' and a JCU Faculty Grant 'Transport of Dissolved Carbon.' We thank Gustavo Saiz, Cassandra Nichols, and Andrew Thompson for field assistance; Michael Zimmermann for both field support and constructive comments on the manuscript, and Bruce LeCornu for allowing us access to his property for analysis in the Moon River estuary. We thank two anonymous reviewers for detailed comments that significantly improved the manuscript.

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Untitled

Cited by 264 publications

References 24 publications

Concentrations and fluxes of dissolved organic carbon in runoff from a forested catchment: insights from high frequency measurements

Concentrations and fluxes of dissolved organic carbon in runoff from a forested catchment: insights from high frequency measurements

Allochthonous dissolved organic carbon in river, lake and coastal systems: transport, function and ecological role

CADICA: Continuous Automated Dissolved Inorganic Carbon Analyzer with application to aquatic carbon cycle science

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