6 Future Research
6.5 Model Uncertainty Estimation
Changes in analytical techniques are necessary when collecting long-term data series, though it is important to note that these changes may bring inconsistencies to the data series. There is considerable scientific interest in estimating data and model uncertainty, especially within the hydrology community. There are, however, at present few attempts in accounting for censored data or differences in data uncertainty in model conditioning and uncertainty estimation. Methods accounting for variable data uncertainty are thus essential for full use of the information contained in long-term data series in environmental modelling.
References
Aitkenhead-Peterson, J.A., McDowell, W.H. & Neff, J.C. (2003). Sources, Production, and Regulation of Allochthonous Dissoved Organic Matter Inputs to Surface Waters. In: Findlay, S.E.G., et al. (Eds.) Aquatic
Ecosystems, Interactivity of Dissolved Organic Matter. pp. 25-70. San
Diego: Academic Press. ISBN 0-12-256371-9.
Altieri, K.E., Carlton, A.G., Lim, H.-J., Turpin, B.J. & Seitzinger, S.P. (2006). Evidence for Oligomer Formation in Clouds: Reactions of Isoprene Oxidation Products. Environmental Science & Technology 40(16), 4956- 4960.
Ballantyne, A.P., Alden, C.B., Miller, J.B., Tans, P.P. & White, J.W.C. (2012). Increase in observed net carbon dioxide uptake by land and oceans during the past 50 years. Nature 488(7409), 70-72.
Barnes, R.T., Smith, R.L. & Aiken, G.R. (2012). Linkages between denitrification and dissolved organic matter quality, Boulder Creek watershed, Colorado.
J. Geophys. Res. 117(G1).
Bastviken, D., Svensson, T., Karlsson, S., Sandén, P. & Öberg, G. (2009).
Temperature Sensitivity Indicates That Chlorination of Organic Matter in Forest Soil Is Primarily Biotic. Environmental Science & Technology 43(10), 3569-3573.
Bastviken, D., Thomsen, F., Svensson, T., Karlsson, S., Sandén, P., Shaw, G., Matucha, M. & Öberg, G. (2007). Chloride retention in forest soil by microbial uptake and by natural chlorination of organic matter.
Geochimica et Cosmochimica Acta 71(13), 3182-3192.
Battin, T.J., Kaplan, L.A., Findlay, S., Hopkinson, C.S., Marti, E., Packman, A.I., Newbold, J.D. & Sabater, F. (2008). Biophysical controls on organic carbon fluxes in fluvial networks. Nature Geoscience 1(2), 95-100. Battin, T.J., Luyssaert, S., Kaplan, L.A., Aufdenkampe, A.K., Richter, A. &
Tranvik, L.J. (2009). The boundless carbon cycle. Nature Geoscience 2(9), 598-600.
Bellamy, P.H., Loveland, P.J., Bradley, R.I., Lark, R.M. & Kirk, G.J.D. (2005). Carbon losses from all soils across England and Wales 1978-2003. Nature 437(7056), 245-248.
Benstead, J.P. & Leigh, D.S. (2012). An expanded role for river networks. Nature
Geoscience 5(10), 678-679.
Berggren, M., Laudon, H. & Jansson, M. (2007). Landscape regulation of bacterial growth efficiency in boreal freshwaters. Global Biogeochemical Cycles 21(4), GB4002.
Berner, R.A. (1999). A new look at the long-term carbon cycle. GSA Today 9(11), 1-6.
Berner, R.A. & Kothavala, Z. (2001). GEOCARB III: A revised model of atmospheric CO2 over phanerozoic time. American Journal of Science 301(2), 182-204.
Bertilsson, S. & Jones, J.B. (2003). Supply of Dissolved Organic Matter to Aquatic Ecosystems: Autochthonous Sources. In: Findlay, S.E.G., et al. (Eds.)
Aquatic Ecosystems: Interactivity of Dissolved Organic Matter. pp. 3-24.
San Diego, USA: Academic Press.
Bertilsson, S., Stepanauskas, R., Cuadros-Hansson, R., Granéli, W., Wikner, J. & Tranvik, L. (1999). Photochemically induced changes in bioavailable carbon and nitrogen pools in a boreal watershed. Aquatic Microbial
Ecology 19(1), 47-56.
Bertilsson, S. & Tranvik, L.J. (2000). Photochemical transformation of dissolved organic matter in lakes. Limnology and Oceanography 45(4), 753-762. Beven, K.J. (2001a). On hypothesis testing in hydrology. Hydrological Processes
15(9), 1655-1657.
Beven, K.J. (2001b). Rainfall-Runoff Modelling: The Primer. Chichester: Wiley. ISBN 0-470-86671-3.
Beven, K.J. (2006). A manifesto for the equifinality thesis. Journal of Hydrology 320(1-2), 18-36.
Beven, K.J. (2009). Environmental Modelling: An Uncertain Future? Abingdon, Great Britain: Routledge.
Beven, K.J. (2010). Preferential flows and travel time distributions: defining adequate hypothesis tests for hydrological process models. Hydrological
Processes 24(12), 1537-1547.
Beven, K.J. & Binley, A. (1992). The future of distributed models: Model calibration and uncertainty prediction. Hydrological Processes 6(3), 279- 298.
Beven, K.J. & Freer, J. (2001). Equifinality, data assimilation, and uncertainty estimation in mechanistic modelling of complex environmental systems using the GLUE methodology. Journal of Hydrology 249(1-4), 11-29. Bishop, K. (1991). Episodic Increases in Stream Acidity, Catchment Flow
Pathways and Hydrograph Separation. Diss. Cambridge:University of
Cambridge.
Bishop, K., Buffam, I., Erlandsson, M., Fölster, J., Laudon, H., Seibert, J. & Temnerud, J. (2008). Aqua Incognita: the unknown headwaters.
Hydrological Processes 22(8), 1239-1242.
Bishop, K., Pettersson, C., Allard, B. & Lee, Y.-H. (1994). Identification of the riparian sources of aquatic dissolved organic carbon. Environment
Bishop, K., Seibert, J., Köhler, S. & Laudon, H. (2004). Resolving the Double Paradox of rapidly mobilized old water with highly variable responses in runoff chemistry. Hydrological Processes 18(1), 185-189.
Blazkova, S. & Beven, K. (2009). A limits of acceptability approach to model evaluation and uncertainty estimation in flood frequency estimation by continuous simulation: Skalka catchment, Czech Republic. Water Resour.
Res. 45.
Boyer, E.W., Hornberger, G.M., Bencala, K.E. & McKnight, D. (1996). Overview of a simple model describing variation of dissolved organic carbon in an upland catchment. Ecological Modelling 86(2-3), 183-188.
Brutsaert, W. (2005). Hydrology. An Introduction. Cambridge: Cambridge University Press. ISBN 0-521-82479-6.
Butman, D. & Raymond, P.A. (2011). Significant efflux of carbon dioxide from streams and rivers in the United States. Nature Geoscience 4(12), 839- 842.
Buytaert, W. & Beven, K. (2011). Models as multiple working hypotheses: hydrological simulation of tropical alpine wetlands. Hydrological
Processes 25(11), 1784-1799.
Campbell, N.A., Reece, J.B., Urry, L.A., Cain, M.L., Wasserman, S.A., Minorsky, P.V. & Jackson, R.B. (2008). Biology. 8th. ed. San Francisco, CA, USA: Pearson Education, Inc. ISBN 978-0-321-53616-7.
Carpenter, S.R., Cole, J.J., Pace, M.L., Van de Bogert, M., Bade, D.L., Bastviken, D., Gille, C.M., Hodgson, J.R., Kitchell, J.F. & Kritzberg, E.S. (2005). Ecosystem subsidies: terrestrial support of aquatic food webs from 13C addition to contrasting lakes. Ecology 86(10), 2737-2750.
Chapin, F., Woodwell, G., Randerson, J., Rastetter, E., Lovett, G., Baldocchi, D., Clark, D., Harmon, M., Schimel, D., Valentini, R., Wirth, C., Aber, J., Cole, J., Goulden, M., Harden, J., Heimann, M., Howarth, R., Matson, P., McGuire, A., Melillo, J., Mooney, H., Neff, J., Houghton, R., Pace, M., Ryan, M., Running, S., Sala, O., Schlesinger, W. & Schulze, E.D. (2006). Reconciling Carbon-cycle Concepts, Terminology, and Methods.
Ecosystems 9(7), 1041-1050.
Christ, M.J. & David, M.B. (1996). Temperature and moisture effects on the production of dissolved organic carbon in a Spodosol. Soil Biology and
Biochemistry 28(9), 1191-1199.
Clark, J.M., Ashley, D., Wagner, M., Chapman, P.J., Lane, S.N., Evans, C.D. & Heathwaite, A.L. (2009). Increased temperature sensitivity of net DOC production from ombrotrophic peat due to water table draw-down. Global
Change Biology 15(4), 794-807.
Clark, J.M., Chapman, P.J., Adamson, J.K. & Lane, S.N. (2005). Influence of drought-induced acidification on the mobility of dissolved organic carbon in peat soils. Global Change Biology 11(5), 791-809.
Clark, J.M., Lane, S.N., Chapman, P.J. & Adamson, J.K. (2007). Export of dissolved organic carbon from an upland peatland during storm events: Implications for flux estimates. Journal of Hydrology 347(3-4), 438-447. Cole, J.J., Prairie, Y.T., Caraco, N.F., McDowell, W.H., Tranvik, L.J., Striegl,
Melack, J. (2007). Plumbing the global carbon cycle: Integrating inland waters into the terrestrial carbon budget. Ecosystems 10(1), 171-184. Cooper, D.M. & Watts, C.D. (2002). A comparison of river load estimation
techniques: application to dissolved organic carbon. Environmetrics 13(7), 733-750.
Creed, I.F., Beall, F.D., Clair, T.A., Dillon, P.J. & Hesslein, R.H. (2008).
Predicting export of dissolved organic carbon from forested catchments in glaciated landscapes with shallow soils. Global Biogeochem. Cycles 22(4), GB4024.
Dawson, J., Soulsby, C., Tetzlaff, D., Hrachowitz, M., Dunn, S. & Malcolm, I. (2008). Influence of hydrology and seasonality on DOC exports from three contrasting upland catchments. Biogeochemistry 90(1), 93-113. Dawson, J.J.C., Tetzlaff, D., Speed, M., Hrachowitz, M. & Soulsby, C. (2011).
Seasonal controls on DOC dynamics in nested upland catchments in NE Scotland. Hydrological Processes 25(10), 1647-1658.
Dixon, R.K., Brown, S., Houghton, R.A., Solomon, A.M., Trexler, M.C. & Wisniewski, J. (1994). Carbon Pools and Flux of Global Forest Ecosystems. Science 263(5144), 185-190.
Dosskey, M.G. & Bertsch, P.M. (1994). Forest sources and pathways of organic matter transport to a blackwater stream: a hydrologic approach.
Biogeochemistry 24(1), 1-19.
Drever, J.I. (2002). The Geochemistry of Natural Waters. Surface and
Groundwater Environments. 3. ed. Upper Saddle River: Prentice-Hall,
Inc. ISBN 0-13-272790-0.
Driscoll, C.T., Driscoll, K.M., Roy, K.M. & Mitchell, M.J. (2003). Chemical Response of Lakes in the Adirondack Region of New York to Declines in Acidic Deposition. Environmental Science & Technology 37(10), 2036- 2042.
Driscoll, C.T., Fuller, R.D. & Schecher, W.D. (1989). The role of organic acids in the acidification of surface waters in the Eastern U.S. Water, Air, & Soil
Pollution 43(1), 21-40.
Driscoll, C.T., Lehtinen, M.D. & Sullivan, T.J. (1994). Modeling the acid-base chemistry of organic solutes in Adirondack, New York, lakes. Water
Resour. Res. 30(2), 297-306.
Duan, Q., Gupta, H.V., Sorooshian, S., Rousseau, A.N. & Turcotte, R. (Eds.) (2003). Calibration of Watershed Models. Washington DC, USA: American Geophysical Union. (Water Science and Application; 6). Duarte, C. & Prairie, Y. (2005). Prevalence of Heterotrophy and Atmospheric CO2
Emissions from Aquatic Ecosystems. Ecosystems 8(7), 862-870.
Eimers, M.C., Buttle, J. & Watmough, S.A. (2008). Influence of seasonal changes in runoff and extreme events on dissolved organic carbon trends in wetland- and upland-draining streams. Canadian Journal of Fisheries and
Aquatic Sciences 65(5), 796-808.
Erlandsson, M., Buffam, I., Folster, J., Laudon, H., Temnerud, J., Weyhenmeyer, G.A. & Bishop, K. (2008). Thirty-five years of synchrony in the organic matter concentrations of Swedish rivers explained by variation in flow and sulphate. Global Change Biology 14(5), 1191-1198.
Erlandsson, M., Cory, N., Fölster, J., Köhler, S., Laudon, H., Weyhenmeyer, G.A. & Bishop, K. (2011). Increasing Dissolved Organic Carbon Redefines the Extent of Surface Water Acidification and Helps Resolve a Classic Controversy. Bioscience 61(8), 614-618.
Eshleman, K.N. & Hemond, H.F. (1985). The Role of Organic-Acids in the Acid- Base Status of Surface Waters at Bickford Watershed, Massachusetts.
Water Resources Research 21(10), 1503-1510.
Evans, C.D., Chapman, P.J., Clark, J.M., Monteith, D.T. & Cresser, M.S. (2006). Alternative explanations for rising dissolved organic carbon export from organic soils. Global Change Biology 12(11), 2044-2053.
Evans, C.D., Monteith, D.T. & Cooper, D.M. (2005). Long-term increases in surface water dissolved organic carbon: Observations, possible causes and environmental impacts. Environmental Pollution 137(1), 55-71.
Evans, C.D., Monteith, D.T., Reynolds, B. & Clark, J.M. (2008). Buffering of recovery from acidification by organic acids. Science of the Total
Environment 404(2-3), 316-325.
Falkowski, P., Scholes, R.J., Boyle, E., Canadell, J., Canfield, D., Elser, J., Gruber, N., Hibbard, K., Hogberg, P., Linder, S., Mackenzie, F.T., Moore, B., III, Pedersen, T., Rosenthal, Y., Seitzinger, S., Smetacek, V. & Steffen, W. (2000). The Global Carbon Cycle: A Test of Our Knowledge of Earth as a System. Science 290(5490), 291-296.
Fiebig, D.M., Lock, M.A. & Neal, C. (1990). Soil water in the riparian zone as a source of carbon for a headwater stream. Journal of Hydrology 116(1-4), 217-237.
Findlay, S.E.G. (2005). Increased carbon transport in the Hudson River:
unexpected consequence of nitrogen deposition? Frontiers in Ecology and
the Environment 3(3), 133-137.
Finlay, J., Neff, J., Zimov, S., Davydova, A. & Davydov, S. (2006). Snowmelt dominance of dissolved organic carbon in high-latitude watersheds: Implications for characterization and flux of river DOC. Geophysical
Research Letters 33(10), L10401.
Freeman, C., Evans, C.D., Monteith, D.T., Reynolds, B. & Fenner, N. (2001). Export of organic carbon from peat soils. Nature 412(6849), 785-785. Freeman, C., Fenner, N., Ostle, N.J., Kang, H., Dowrick, D.J., Reynolds, B., Lock,
M.A., Sleep, D., Hughes, S. & Hudson, J. (2004). Export of dissolved organic carbon from peatlands under elevated carbon dioxide levels.
Nature 430(6996), 195-198.
Fröberg, M., Berggren, D., Bergkvist, B., Bryant, C. & Mulder, J. (2006). Concentration and Fluxes of Dissolved Organic Carbon (DOC) in Three Norway Spruce Stands along a Climatic Gradient in Sweden.
Biogeochemistry 77(1), 1-23.
Futter, M.N., Butterfield, D., Cosby, B.J., Dillon, P.J., Wade, A.J. & Whitehead, P.G. (2007). Modeling the mechanisms that control in-stream dissolved organic carbon dynamics in upland and forested catchments. Water
Resources Research 43(2), W02424.
Futter, M.N., Forsius, M., Holmberg, M. & Starr, M. (2009). A long-term simulation of the effects of acidic deposition and climate change on
surface water dissolved organic carbon concentrations in a boreal catchment. Hydrology Research 40(2-3), 291-305.
Fölster, J. (2001). Significance of processes in the near-stream zone on stream water acidity in a small acidified forested catchment. Hydrological
Processes 15(2), 201-217.
Giesler, R., Högberg, M., Strobel, B., Richter, A., Nordgren, A. & Högberg, P. (2007). Production of dissolved organic carbon and low-molecular weight organic acids in soil solution driven by recent tree photosynthate.
Biogeochemistry 84(1), 1-12.
Godsey, S.E., Kirchner, J.W. & Clow, D.W. (2009). Concentration-discharge relationships reflect chemostatic characteristics of US catchments.
Hydrological Processes 23(13), 1844-1864.
Goodale, C.L., Aber, J.D., Vitousek, P.M. & McDowell, W.H. (2005). Long-term Decreases in Stream Nitrate: Successional Causes Unlikely; Possible Links to DOC? Ecosystems 8(3), 334-337.
Gorham, E. (1991). Northern peatlands: Role in the carbon-cycle and probable responses to climatic warming. Ecological Applications 1(2), 182-195. Grabs, T., Bishop, K., Laudon, H., Lyon, S.W. & Seibert, J. (2012). Riparian zone
hydrology and soil water total organic carbon (TOC): implications for spatial variability and upscaling of lateral riparian TOC exports.
Biogeosciences 9(10), 3901-3916.
Grieve, I.C. (1984). Concentrations and annual loading of dissolved organic matter in a small moorland stream. Freshwater Biology 14(5), 533-537.
Grieve, I.C. (1991). A model of dissolved organic carbon concentrations in soil and stream waters. Hydrological Processes 5(3), 301-307.
Gu, C., Karthikeyan, K.G., Sibley, S.D. & Pedersen, J.A. (2007). Complexation of the antibiotic tetracycline with humic acid. Chemosphere 66(8), 1494- 1501.
Gustafsson, O. & Gschwend, P.M. (1997). Aquatic colloids: Concepts, definitions, and current challenges. Limnology and Oceanography 42(3), 519-528. Hartmann, D.L. (1994). Global Physical Climatology. San Diego: Academic Press.
(International Geophysics Series; 56). ISBN 0-12-328530-5.
Hayes, D.J., McGuire, A.D., Kicklighter, D.W., Gurney, K.R., Burnside, T.J. & Melillo, J.M. (2011). Is the northern high-latitude land-based CO2 sink weakening? Global Biogeochem. Cycles 25(3).
Heimann, M. & Reichstein, M. (2008). Terrestrial ecosystem carbon dynamics and climate feedbacks. Nature 451(7176), 289-292.
Hemond, H.F. (1990). Acid neutralizing capacity, alkalinity, and acid-base status of natural waters containing organic acids. Environmental Science &
Technology 24(10), 1486-1489.
Hertkorn, N., Benner, R., Frommberger, M., Schmitt-Kopplin, P., Witt, M., Kaiser, K., Kettrup, A. & Hedges, J.I. (2006). Characterization of a major refractory component of marine dissolved organic matter. Geochimica et
Cosmochimica Acta 70(12), 2990-3010.
Hinton, M.J., Schiff, S.L. & English, M.C. (1998). Sources and flowpaths of dissolved organic carbon during storms in two forested watersheds of the Precambrian Shield. Biogeochemistry 41(2), 175-197.
Hongve, D., Riise, G. & Kristiansen, J. (2004). Increased colour and organic acid concentrations in Norwegian forest lakes and drinking water – a result of increased precipitation? Aquatic Sciences 66(2), 231-238.
Hope, D., Billett, M.F. & Cresser, M.S. (1994). A review of the export of carbon in river water: Fluxes and processes. Environmental Pollution 84(3), 301- 324.
Hornberger, G.M., Bencala, K.E. & McKnight, D.M. (1994). Hydrological controls on dissolved organic carbon during snowmelt in the Snake River near Montezuma, Colorado. Biogeochemistry 25(3), 147-165.
Hruska, J., Kram, P., McDowell, W.H. & Oulehle, F. (2009). Increased Dissolved Organic Carbon (DOC) in Central European Streams is Driven by Reductions in Ionic Strength Rather than Climate Change or Decreasing Acidity. Environmental Science & Technology 43(12), 4320-4326. Hruska, J., Laudon, H., Johnson, C.E., Kohler, S. & Bishop, K. (2001). Acid/base
character of organic acids in a boreal stream during snowmelt. Water
Resources Research 37(4), 1043-1056.
Humborg, C., Mörth, C.M., Sundbom, M., Borg, H., Blenckner, T., Giesler, R. & Ittekkot, V. (2010). CO2 supersaturation along the aquatic conduit in Swedish watersheds as constrained by terrestrial respiration, aquatic respiration and weathering. Global Change Biology 16(7), 1966-1978. Högberg, M.N. & Högberg, P. (2002). Extramatrical ectomycorrhizal mycelium
contributes one-third of microbial biomass and produces, together with associated roots, half the dissolved organic carbon in a forest soil. New
Phytologist 154(3), 791-795.
Högberg, P., Nordgren, A., Buchmann, N., Taylor, A.F.S., Ekblad, A., Högberg, M.N., Nyberg, G., Ottosson-Löfvenius, M. & Read, D.J. (2001). Large- scale forest girdling shows that current photosynthesis drives soil respiration. Nature 411(6839), 789-792.
Jansson, M., Persson, L., De Roos, A.M., Jones, R.I. & Tranvik, L.J. (2007). Terrestrial carbon and intraspecific size-variation shape lake ecosystems.
Trends in Ecology & Evolution 22(6), 316-322.
Jardine, P.M., Weber, N.L. & McCarthy, J.F. (1989). Mechanisms of Dissolved Organic-Carbon Adsorption on Soil. Soil Science Society of America
Journal 53(5), 1378-1385.
Jonsson, A., Karlsson, J. & Jansson, M. (2003). Sources of Carbon Dioxide Supersaturation in Clearwater and Humic Lakes in Northern Sweden.
Ecosystems 6(3), 224-235.
Jutras, M.-F., Nasr, M., Castonguay, M., Pit, C., Pomeroy, J.H., Smith, T.P., Zhang, C.-f., Ritchie, C.D., Meng, F.-R., Clair, T.A. & Arp, P.A. (2011). Dissolved organic carbon concentrations and fluxes in forest catchments and streams: DOC-3 model. Ecological Modelling 222(14), 2291-2313. Kaiser, K. & Guggenberger, G. (2000). The role of DOM sorption to mineral
surfaces in the preservation of organic matter in soils. Organic
Geochemistry 31(7-8), 711-725.
Kalbitz, K., Solinger, S., Park, J.H., Michalzik, B. & Matzner, E. (2000). Controls on the dynamics of dissolved organic matter in soils: A review. Soil
Karlsson, J., Bystrom, P., Ask, J., Ask, P., Persson, L. & Jansson, M. (2009). Light limitation of nutrient-poor lake ecosystems. Nature 460(7254), 506-509. Kelleher, B.P. & Simpson, A.J. (2006). Humic Substances in Soils: Are They
Really Chemically Distinct? Environmental Science & Technology 40(15), 4605-4611.
Kerner, M., Hohenberg, H., Ertl, S., Reckermann, M. & Spitzy, A. (2003). Self- organization of dissolved organic matter to micelle-like microparticles in river water. Nature 422(6928), 150-154.
Klaminder, J., Grip, H., Mörth, C.M. & Laudon, H. (2011). Carbon mineralization and pyrite oxidation in groundwater: Importance for silicate weathering in boreal forest soils and stream base-flow chemistry. Applied Geochemistry 26(3), 319-325.
Kleber, M. & Johnson, M.G. (2010). Advances in Understanding the Molecular Structure of Soil Organic Matter: Implications for Interactions in the Environment. Advances in Agronomy 106, 77-142.
Kleber, M., Sollins, P. & Sutton, R. (2007). A conceptual model of organo-mineral interactions in soils: self-assembly of organic molecular fragments into zonal structures on mineral surfaces. Biogeochemistry 85(1), 9-24. Klotzbücher, T., Kaiser, K., Guggenberger, G., Gatzek, C. & Kalbitz, K. (2011). A
new conceptual model for the fate of lignin in decomposing plant litter.
Ecology 92(5), 1052-1062.
Koprivnjak, J.F., Dillon, P.J. & Molot, L.A. (2010). Importance of CO2 evasion from small boreal streams. Global Biogeochem. Cycles 24(4).
Kosten, S., Roland, F., Da Motta Marques, D.M.L., Van Nes, E.H., Mazzeo, N., Sternberg, L.d.S.L., Scheffer, M. & Cole, J.J. (2010). Climate-dependent CO2 emissions from lakes. Global Biogeochem. Cycles 24(2).
Krasner, S.W., Weinberg, H.S., Richardson, S.D., Pastor, S.J., Chinn, R., Sclimenti, M.J., Onstad, G.D. & Thruston, A.D. (2006). Occurrence of a New Generation of Disinfection Byproducts. Environmental Science &
Technology 40(23), 7175-7185.
Krug, E.C. & Frink, C.R. (1983). Acid rain on acid soil: a new perspective. Science 221(4610), 520-525.
Kögel-Knabner, I. (2002). The macromolecular organic composition of plant and microbial residues as inputs to soil organic matter. Soil Biology and
Biochemistry 34(2), 139-162.
Köhler, S., Buffam, I., Jonsson, A. & Bishop, K. (2002). Photochemical and microbial processing of stream and soil water dissolved organic matter in a boreal forested catchment in northern Sweden. Aquatic Sciences 64(3), 269-281.
Köhler, S., Laudon, H., Wilander, A. & Bishop, K. (2000). Estimating organic acid dissociation in natural surface waters using total alkalinity and TOC.
Water Research 34(5), 1425-1434.
Lal, R. (2005). Forest soils and carbon sequestration. Forest Ecology and
Management 220(1-3), 242-258.
Lam, B., Baer, A., Alaee, M., Lefebvre, B., Moser, A., Williams, A. & Simpson, A.J. (2007). Major Structural Components in Freshwater Dissolved Organic Matter. Environmental Science & Technology 41(24), 8240-8247.
Laudon, H., Berggren, M., Ågren, A., Buffam, I., Bishop, K., Grabs, T., Jansson, M. & Köhler, S. (2011). Patterns and Dynamics of Dissolved Organic Carbon (DOC) in Boreal Streams: The Role of Processes, Connectivity, and Scaling. Ecosystems 14(6), 880-893.
Laudon, H., Köhler, S. & Buffam, I. (2004). Seasonal TOC export from seven boreal catchments in northern Sweden. Aquatic Sciences 66(2), 223-230. Limpens, J., Berendse, F., Blodau, C., Canadell, J.G., Freeman, C., Holden, J.,
Roulet, N., Rydin, H. & Schaepman-Strub, G. (2008). Peatlands and the carbon cycle: from local processes to global implications - a synthesis.
Biogeosciences 5(5), 1475-1491.
Lovett, G.M., Burns, D.A., Driscoll, C.T., Jenkins, J.C., Mitchell, M.J., Rustad, L., Shanley, J.B., Likens, G.E. & Haeuber, R. (2007). Who needs
environmental monitoring? Frontiers in Ecology and the Environment 5(5), 253-260.
Lundström, U.S. (1994). Significance of organic acids for weathering and the podzolization process. Environment International 20(1), 21-30. Lyon, S.W., Mörth, M., Humborg, C., Giesler, R. & Destouni, G. (2010). The
relationship between subsurface hydrology and dissolved carbon fluxes for a sub-arctic catchment. Hydrol. Earth Syst. Sci. 14(6), 941-950. Löfgren, S., Aastrup, M., Bringmark, L., Hultberg, H., Lewin-Pihlblad, L., Lundin,
L., Karlsson, G. & Thunholm, B. (2011). Recovery of Soil Water, Groundwater, and Streamwater From Acidification at the Swedish Integrated Monitoring Catchments. AMBIO 40(8), 836-856.
Marschner, B., Brodowski, S., Dreves, A., Gleixner, G., Gude, A., Grootes, P.M., Hamer, U., Heim, A., Jandl, G., Ji, R., Kaiser, K., Kalbitz, K., Kramer, C., Leinweber, P., Rethemeyer, J., Schäffer, A., Schmidt, M.W.I., Schwark, L. & Wiesenberg, G.L.B. (2008). How relevant is recalcitrance for the stabilization of organic matter in soils? Journal of Plant Nutrition and
Soil Science 171(1), 91-110.
Matilainen, A., Vepsäläinen, M. & Sillanpää, M. (2010). Natural organic matter removal by coagulation during drinking water treatment: A review.
Advances in Colloid and Interface Science 159(2), 189-197.
McDowell, W.H. & Wood, T. (1984). Podzolization - Soil Processes Control Dissolved Organic-Carbon Concentrations in Stream Water. Soil Science 137(1), 23-32.
Meyer, J.L., Wallace, J.B. & Eggert, S.L. (1998). Leaf Litter as a Source of Dissolved Organic Carbon in Streams. Ecosystems 1(3), 240-249. Michalzik, B., Tipping, E., Mulder, J., Lancho, J.F.G., Matzner, E., Bryant, C.L.,
Clarke, N., Lofts, S. & Esteban, M.A.V. (2003). Modelling the production and transport of dissolved organic carbon in forest soils. Biogeochemistry 66(3), 241-264.
Mladenov, N., Williams, M.W., Schmidt, S.K. & Cawley, K. (2012). Atmospheric deposition as a source of carbon and nutrients to an alpine catchment of the Colorado Rocky Mountains. Biogeosciences 9(8), 3337-3355. Moldan, F., Hruška, J., Evans, C. & Hauhs, M. (2012). Experimental simulation of
organic carbon leaching from a forested catchment, Gårdsjön, Sweden.
Biogeochemistry 107, 455-469.
Monteith, D.T., Stoddard, J.L., Evans, C.D., de Wit, H.A., Forsius, M., Hogasen, T., Wilander, A., Skjelkvale, B.L., Jeffries, D.S., Vuorenmaa, J., Keller, B., Kopacek, J. & Vesely, J. (2007). Dissolved organic carbon trends resulting from changes in atmospheric deposition chemistry. Nature 450(7169), 537-540.
Mopper, K., Stubbins, A., Ritchie, J.D., Bialk, H.M. & Hatcher, P.G. (2007). Advanced Instrumental Approaches for Characterization of Marine Dissolved Organic Matter: Extraction Techniques, Mass Spectrometry, and Nuclear Magnetic Resonance Spectroscopy. Chemical Reviews 107(2), 419-442.
Mulholland, P.J. (2003). Large-Scale Patterns in Dissolved Organic Carbon Concentration, Flux, and Sources. In: Findlay, S.E.G., et al. (Eds.)
Aquatic Ecosystems, Interactivity of Dissolved Organic Matter. pp. 139-
159. San Diego, USA: Academic Press. ISBN 0-12-256371-9.
Mulholland, P.J. & Hill, W.R. (1997). Seasonal patterns in streamwater nutrient and dissolved organic carbon concentrations: Separating catchment flow path and in-stream effects. Water Resour. Res. 33(6), 1297-1306. Neff, J.C. & Asner, G.P. (2001). Dissolved Organic Carbon in Terrestrial
Ecosystems: Synthesis and a Model. Ecosystems 4(1), 29-48.
Neff, J.C. & Hooper, D.U. (2002). Vegetation and climate controls on potential CO2, DOC and DON production in northern latitude soils. Global Change
Biology 8(9), 872-884.
Niederer, C., Schwarzenbach, R.P. & Goss, K.U. (2007). Elucidating Differences in the Sorption Properties of 10 Humic and Fulvic Acids for Polar and Nonpolar Organic Chemicals. Environmental Science & Technology 41(19), 6711-6717.
Nyberg, L. (1995). Water flow path interactions with soil hydraulic properties in till soil at Gårdsjön, Sweden. Journal of Hydrology 170(1-4), 255-275. Oliva, P., Viers, J., Dupre, B., Fortune, J.P., Martin, F., Braun, J.J., Nahon, D. &
Robain, H. (1999). The effect of organic matter on chemical weathering: study of a small tropical watershed: Nsimi-Zoetele site, Cameroon.
Geochimica et Cosmochimica Acta 63(23-24), 4013-4035.
Oliver, B.G., Thurman, E.M. & Malcolm, R.L. (1983). The contribution of humic substances to the acidity of colored natural waters. Geochimica et
Cosmochimica Acta 47(11), 2031-2035.
Osono, T. (2007). Ecology of ligninolytic fungi associated with leaf litter decomposition. Ecological Research 22(6), 955-974.
Pace, M.L., Cole, J.J., Carpenter, S.R., Kitchell, J.F., Hodgson, J.R., Van de Bogert, M.C., Bade, D.L., Kritzberg, E.S. & Bastviken, D. (2004). Whole- lake carbon-13 additions reveal terrestrial support of aquatic food webs.
Nature 427(6971), 240-243.
Pan, Y., Birdsey, R.A., Fang, J., Houghton, R., Kauppi, P.E., Kurz, W.A., Phillips, O.L., Shvidenko, A., Lewis, S.L., Canadell, J.G., Ciais, P., Jackson, R.B., Pacala, S.W., McGuire, A.D., Piao, S., Rautiainen, A., Sitch, S. & Hayes,
D. (2011). A Large and Persistent Carbon Sink in the World's Forests.