![]() Soil C:N as a predictor of annual riverine DOC flux at local and global scales. Role of photoreactions in the formation of biologically labile compounds from dissolved organic matter. Carbon dioxide supersaturation promotes primary production in lakes. Stoichiometric control of organic carbon–nitrate relationships from soils to the sea. Effects of small ponds on stream water chemistry. Competition between biological and photochemical processes in the mineralization of dissolved organic carbon. Sunlight-induced carbon dioxide emissions from inland waters. Koehler, B., Landelius, T., Weyhenmeyer, G. ![]() Selective decay of terrestrial organic carbon during transport from land to sea. Dissolved organic and inorganic carbon mass balances in central Ontario lakes. Organic carbon decomposition rates controlled by water retention time across inland waters. Relative independence of dissolved organic carbon transport and processing in a large temperate river: the Hudson River as both pipe and reactor. Dissolved organic carbon in Alaskan boreal forest: sources, chemical characteristics, and biodegradability. Photodegradation of natural organic matter from diverse freshwater sources. Photochemical and microbial processing of stream and soilwater dissolved organic matter in a boreal forested catchment in northern Sweden. Effect of pH on photo-oxidation of dissolved organic carbon by hydroxyl radicals in a coloured, softwater stream. The rate of loss of dissolved organic carbon (DOC) through a catchment. Global carbon dioxide emissions from inland waters. Global abundance and size distribution of streams and rivers. Dissolved organic carbon uptake in streams: a review and assessment of reach-scale measurements. Sunlight controls water column processing of carbon in arctic fresh waters. Lakes and reservoirs as regulators of carbon cycling and climate. Plumbing the global carbon cycle: integrating inland waters into the terrestrial carbon budget. in Climate Change 2013: The Physical Science Basis (eds Stocker, T. We conclude that rates and locations of dissolved organic carbon processing and associated CO 2 emissions in inland waters may be misrepresented in global carbon budgets if temporal and spatial reactivity gradients are not accounted for.Ĭiais, P. Eutrophication caused lakes to transition from sinks to sources of dissolved organic carbon. ![]() Our results suggest a dominant role of rapid light-driven removal in water bodies with a short water residence time, whereas in water bodies with longer residence times, slower biotic production and consumption processes are dominant and counterbalance one another. We find that trophic status strongly regulates whether water bodies act as net dissolved organic carbon sources or sinks, and that rates of both dissolved organic carbon production and consumption can be predicted from water residence time. Here we present in situ dissolved organic carbon budget data from 82 predominantly European and North American water bodies with varying nutrient concentrations and water residence times ranging from one week to 700 years. However, predicting dissolved organic carbon reactivity remains problematic. Inland waters are hotspots for organic matter turnover, via both biological and photochemical processes, and mediate carbon transfer between land, oceans and atmosphere. The transport of dissolved organic carbon from land to ocean is a large dynamic component of the global carbon cycle. ![]()
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