A First Regional-Scale Estimate of Climate-Driven Terrestrial Carbon Export in Boreal Catchments

Diodato, Nazzareno; Esposito, Libera; Bellocchi, Gianni

doi:10.3390/cli6020022

Cited by 3 publications

(3 citation statements)

References 37 publications

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“…The third study had observations also from northern Finland and very long time series [24], which could as well explain the differences. In managed catchments, the mean TOC export obtained in our study (79.4 kg ha −1 a −1 ) is within the range reported in other boreal catchments (23-148 kg ha −1 a −1 ) [4,51].…”

Section: Controls Of Tn and Tp Concentration And Exportsupporting

confidence: 87%

“…Boreal catchments are mosaics of upland forests, peatlands and water bodies such as streams, ponds, lakes and rivers. Forest management practices impact carbon (C) and nutrient export to aquatic systems [1][2][3][4]. The effect of different forest management practices on C, nitrogen (N) and phosphorus (P) export to water courses have been studied extensively during the past decades.…”

Section: Introductionmentioning

confidence: 99%

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Controls of Organic Carbon and Nutrient Export from Unmanaged and Managed Boreal Forested Catchments

Aaltonen

Tuukkanen

Palviainen

et al. 2021

Water

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Understanding the anthropogenic and natural factors that affect runoff water quality is essential for proper planning of water protection and forest management, particularly in the changing climate. We measured water quality and runoff from 10 unmanaged and 20 managed forested headwater catchments (7–12,149 ha) located in Finland. We used linear mixed effect models to test whether the differences in total organic carbon (TOC), total nitrogen (TN) and total phosphorus (TP) export and concentrations observed can be explained by catchment characteristics, land use, forest management, soil fertility, tree volume and hydrometeorological variables. Results show that much of variation in TOC, TN and TP concentrations and export was explained by drainage, temperature sum, peatland percentage and the proportion of arable area in the catchment. These models explained 45–63% of variation in concentrations and exports. Mean annual TOC export in unmanaged catchments was 56.4 ± 9.6 kg ha−1 a−1, while in managed it was 79.3 ± 3.3 kg ha−1 a−1. Same values for TN export were 1.43 ± 0.2 kg ha−1 a−1 and 2.31 ± 0.2 kg ha−1 a−1, while TP export was 0.053 ± 0.009 kg ha−1 a−1 and 0.095 ± 0.008 kg ha−1 a−1 for unmanaged and managed, respectively. Corresponding values for concentrations were: TOC 17.7 ± 2.1 mg L−1 and 28.7 ± 1.6 mg L−1, for TN 420 ± 45 µg L−1 and 825 ± 51 µg L−1 and TP 15.3 ± 2.3 µg L−1 and 35.6 ± 3.3 µg L−1. Overall concentrations and exports were significantly higher in managed than in unmanaged catchments. Long term temperature sum had an increasing effect on all concentrations and exports, indicating that climate warming may set new challenges to controlling nutrient loads from catchment areas.

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Section: Controls Of Tn and Tp Concentration And Exportsupporting

confidence: 87%

Section: Introductionmentioning

confidence: 99%

Controls of Organic Carbon and Nutrient Export from Unmanaged and Managed Boreal Forested Catchments

Aaltonen

Tuukkanen

Palviainen

et al. 2021

Water

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“…This is why an explicit separation of the effects of climate and land-use changes on river sediments is complicated. Change in land use likely plays more important roles at the centennial time-scale while climate change may have had a strong impact and exerted important feedbacks on erosional processes and sediment transport in the last decades [103]. When only rainfall data are available on monthly basis, the use of models based on percentiles of the monthly precipitation distribution is desirable for long-term reconstructions [104].…”

Section: Discussionmentioning

confidence: 99%

The Rise of Climate-Driven Sediment Discharge in the Amazonian River Basin

et al. 2020

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The occurrence of hydrological extremes in the Amazon region and the associated sediment loss during rainfall events are key features in the global climate system. Climate extremes alter the sediment and carbon balance but the ecological consequences of such changes are poorly understood in this region. With the aim of examining the interactions between precipitation and landscape-scale controls of sediment export from the Amazon basin, we developed a parsimonious hydro-climatological model on a multi-year series (1997-2014) of sediment discharge data taken at the outlet of Óbidos (Brazil) watershed (the narrowest and swiftest part of the Amazon River). The calibrated model (correlation coefficient equal to 0.84) captured the sediment load variability of an independent dataset from a different watershed (the Magdalena River basin), and performed better than three alternative approaches. Our model captured the interdecadal variability and the long-term patterns of sediment export. In our reconstruction of yearly sediment discharge over 1859-2014, we observed that landscape erosion changes are mostly induced by single storm events, and result from coupled effects of droughts and storms over long time scales. By quantifying temporal variations in the sediment produced by weathering, this analysis enables a new understanding of the linkage between climate forcing and river response, which drives sediment dynamics in the Amazon basin.

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Contribution of water erosion to organic carbon and total nitrogen loads in agricultural discharge from boreal mineral soils

Manninen,

Kanerva,

Lemola

et al. 2023

Science of The Total Environment

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A First Regional-Scale Estimate of Climate-Driven Terrestrial Carbon Export in Boreal Catchments

Cited by 3 publications

References 37 publications

Controls of Organic Carbon and Nutrient Export from Unmanaged and Managed Boreal Forested Catchments

Controls of Organic Carbon and Nutrient Export from Unmanaged and Managed Boreal Forested Catchments

The Rise of Climate-Driven Sediment Discharge in the Amazonian River Basin

Contribution of water erosion to organic carbon and total nitrogen loads in agricultural discharge from boreal mineral soils

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