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Estimating Absorption Coefficients of Colored Dissolved Organic Ma...

By: B. Gentili; S. B. Hooker; M. Babin; A. Bricaud; A. Matsuoka

Description: CNRS/INSU Laboratoire d'océanographie de Villefranche (LOV) – UMR7093, Université Pierre et Marie Curie (Paris 6)/ Centre National de la Recherche Scientifique (CNRS), B.P. 08, Port de la Darse, Villefranche-sur-Mer Cedex, 06230, France. A series of papers have suggested that freshwater discharge, including a large amount of dissolved organic matter (DOM), has increased since the middle of the 20th century. In this study, a semi-analytical algorithm for e...

Peterson, B. J., Holmes, R. M., McClelland, J. W., Vorosmarty, C. J., Lammers, R. B., Shiklomanov, A. I., Shiklomanov, I. A., and Rahmstorf, S.: Increasing river discharge to the Arctic Ocean, Science, 298, 2171–2173, 2002.; Siegel, D. A., Maritorena, S., Nelson, N. B., Hansell, D. A., and Lorenzi-Kayser, M.: Global distribution and dynamics of colored dissolved and detrital organic materials, J. Geophys. Res., 107, 3228, doi:

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Seasonal Dissolved Inorganic Nitrogen and Phosphorus Budgets for T...

By: Y. Wan; J. N. Boyer; P. H. Doering; C. Buzzelli

Description: Coastal Ecosystems Section, South Florida Water Management District, West Palm Beach, FL 33406, USA. Interactions among watershed nutrient loading, circulation, and biogeochemical cycling determine the capacity of estuaries to accommodate introduced nutrients. Baseline quantification of loading, flushing time, export, and internal processes is essential to understand responses of sub-tropical estuaries to variable climate and nutrient loading. The go...

Barnes, T.: Caloosahatchee estuary conceptual ecological model, Wetlands, 25, 884–897, 2005.; Brock, D. A.: Nitrogen budget for low and high freshwater inflows, Nueces Estuary, Texas, Estuaries, 24, 509–521, 2001.; Antonini, G. A., Fann, D. A., and Roat, P.: A Historical Geography of Southwest Florida Waterways. Volume II, Placida Harbor to Marco Island, National Sea Grant College Program, College Park, MD, 1–16, 2002.; Buzzelli, C., Holland, A. F., Sanger, D. S., and Co...

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Mechanisms for the Suppression of Methane Production in Peatland S...

By: B. J. M. Bohannan; J. K. Keller; Q. Jin; S. D. Bridgham; R. Ye

Description: University of Oregon, Institute of Ecology and Evolution, Environmental Sciences Institute, Eugene, Oregon 97403, USA. Methane (CH4) production is often impeded in many northern peatland soils, although inorganic terminal electron acceptors (TEAs) are usually present in low concentrations in these soils. Recent studies suggest that humic substances in wetland soils can be utilized as organic TEAs for anaerobic respiration and may directl...

Bragazza, L., Parisod, J., Buttler, A., and Bardgett, R. D.: Biogeochemical plant-soil microbe feedback in response to climate warming in peatlands, Nature Clim. Change, 3, 273–277, 2013.; Brauer, S. L., Yavitt, J. B., and Zinder, S. H.: Methanogenesis in McLean Bog, an acidic peat bog in upstate New York: stimulation by H2/CO2 in the presence of rifampicin, or by low concentrations of acetate, Geomicrobiol. J., 21, 433–443,

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Reviews and Syntheses: Ocean Acidification and Its Potential Impac...

By: M. Minella; C.-q. Liu; A. Chanda; E. Konohira; H. Sakugawa; K. Gao; B. Wang; W. D. Zhai; E. Tanoue; D. Vione; K. M. G. Mostofa; D. Minakata; T. Yoshioka; K. Hayakawa; A. Akhand; T. Arakaki

Description: Institute of Surface Earth System Science, Tianjin University, Tianjin 300072, China. Ocean acidification, a complex phenomenon that lowers seawater pH, is the net outcome of several contributions. They include the dissolution of increasing atmospheric CO2 that adds up with dissolved inorganic carbon (dissolved CO2, H2CO3, HCO3, and CO32−) generated upon minera...

Abril, G., Martinez, J.-M., Artigas, L. F., Moreira-Turcq, P., Benedetti, M. F., Vidal, L., Meziane, T., Kim, J.-H., Bernardes, M. C., Savoye, N., Deborde, J., Souza, E. L., Alberic, P., Landim de Souza, M. F., and Roland, F.: Amazon River carbon dioxide outgassing fuelled by wetlands, Nature, 505, 395–398, 2014.; Akhand, A., Chanda, A., Dutta, S., Manna, S., Sanyal, P., Hazra, S., Rao, K., and Dadhwal, V.: Dual character of Sundarban estuary as a source and sink of CO

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Mitigation of Agriculture Emissions in the Tropics: Comparing Fore...

By: M. Herold; L. Kooistra; M. C. Rufino; L. Verchot; S. Carter; K. Neumann

Description: Laboratory of Geo-Information Science and Remote Sensing, Wageningen University, 6708 PB Wageningen, the Netherlands. Emissions from agriculture-driven deforestation are of global concern, but forest land-sparing interventions such as agricultural intensification and utilization of available land offer opportunities for mitigation. In many tropical countries, where agriculture is the major driver of deforestation, interventions in the agriculture s...

Achard, F., Beuchle, R., Mayaux, P., Stibig, H. J., Bodart, C., Brink, A., Carboni, S., Desclée, B., Donnay, F., Eva, H. D., Lupi, A., Raši, R., Seliger, R., and Simonetti, D.: Determination of tropical deforestation rates and related carbon losses from 1990 to 2010, Glob. Change Biol., 20, 2540–2554, 2014.; Alexandratos, N. and Bruinsma, J.: World Agriculture Towards 2030/2050, the 2012 Revision, FAO, Rome, Italy, 2012.; Angelsen, A.: Moving Ahead with REDD Issues, Opti...

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Nitrate and Dissolved Nitrous Oxide in Groundwater Within Cropped ...

By: T. M. Isenhart; R. C. Schultz; T. B. Parkin; T. E. Loynachan; D.-g. Kim

Description: Department of Natural Resource Ecology and Management, Iowa State University, Ames, Iowa 50011-3221, USA. Transport and fate of dissolved nitrous oxide (N2O) in groundwater and its significance to nitrogen dynamics within agro-ecosystems are poorly known in spite of significant potential of N2O to global warming and ozone depletion. Increasing denitrification in riparian buffers may trade a reduction in nitrate (NO3−...

Blicher-Mathiesen, G. and Hoffmann, C. C.: Denitrification as a sink for dissolved nitrous oxide in a freshwater riparian fen, J. Environ. Qual., 28, 257–262, 1999.; Andress, R. J.: Fate and transport of nitrate in groundwater within a riparian buffer in the Bear Creek watershed, M.S. thesis, Iowa State University, Ames, IA, USA, 157 pp., 1999.; Clément, J. C., Holmes, R. M., Peterson, B. J., and Pinay, G.: Isotopic investigation of denitrification in a riparian ecosyste...

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Constraints from Atmospheric Co2 and Satellite-based Vegetation Ac...

By: D. Dalmonech; S. Zaehle

Description: Max Planck Institute for Biogeochemistry, Biogeochemical Systems Department, Hans-Knöll-Str. 10, 07745 Jena, Germany. Terrestrial ecosystem models used for Earth system modelling show a significant divergence in future patterns of ecosystem processes, in particular carbon exchanges, despite a seemingly common behaviour for the contemporary period. An in-depth evaluation of these models is hence of high importance to achieve a better understan...

Alessandri, A. and Navarra, A.: On the coupling between vegetation and rainfall inter-annual anomalies: possible contributions to seasonal rainfall predictability over land areas, Geophys. Res. Lett., 35, 1–6, doi:10.1029/2007GL032415, 2008.; Angert, A., Biraud, S., Bonfils, C., Henning, C. C., Buermann, W., Pinzon, J., Tucker, C. J., and Fung, I.: Drier summers cancel out the CO2 uptake enhancement induced by...

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Spatial and Temporal Trends in Summertime Climate and Water Quali...

By: D. C. McCorkle; D. M. Glover; C. Neill; R. W. Jakuba; J. E. Costa; S. C. Williamson; T. Williams; J. E. Rheuban; S. C. Doney

Description: Department of Marine Chemistry and Geochemistry, Woods Hole Oceanographic Institution, Woods Hole, MA, 02543, USA. Degradation of coastal ecosystems by eutrophication is largely defined by nitrogen loading from land via surface and groundwater flows. However, indicators of water quality are highly variable due to a myriad of other drivers, including temperature and precipitation. To evaluate these drivers, we examined spatial and temporal trends i...

Benson, J. L., Schlezinger, D., and Howes, B. L.: Relationship between nitrogen concentration, light, and Zostera marina habitat quality and survival in southeastern Massachusetts estuaries, J. Environ. Manage., 131, 129–137, 2013.; Boyer, J. N., Fourqurean, J. W., and Jones, R. D.: Spatial characterization of water quality in Florida Bay and Whitewater Bay by principal component and cluster analyses: zones of similar influence (ZSI), Estuaries, 20, 743–758, 1997....

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Numerical Modelling of Methyl Iodide in the Eastern Tropical Atlan...

By: I. Hense; M. Rothe; I. Stemmler

Description: Institute for Hydrobiology and Fisheries Science, CEN, University of Hamburg, Hamburg, Germany. Methyl iodide (CH3I) is a volatile organic halogen compound that contributes significantly to the transport of iodine from the ocean to the atmosphere, where it plays an important role in tropospheric chemistry. CH3I is naturally produced and occurs in the global ocean. The processes involved in the formation of CH3I, however, a...

Chameides, W. and Davis, D.: Iodine: its possible role in tropospheric photochemistry, J. Geophys. Res., 85, 7383–7398, 1980.; Agusti, S.: Viability and niche segregation of Prochlorococcus and Synechococcus cells across the Central Atlantic Ocean, Aquat. Microb. Ecol., 36, 53–59, 2004.; Bange, H.: FS Poseidon Fahrtbericht/Cruise Report P399 – 2 & 3: Eastern tropical North Atlantic; P399-2: 31.04.2010–17.06.2010 Las Palmas – Las Palmas (Canary Islands), P399-3: 18.–24.06...

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The Influence of C3 and C4 Vegetation on Soil Organic Matter Dynam...

By: H. Compaore; C. A. Quesada; C. Wurster; A. Diallo; E. Veenendaal; M. Bird; T. R. Feldpausch; G. Saiz; T. Domingues; F. Schrodt; J. Lloyd; F. Hien; G. Jacobsen; G. Djagbletey; P. Ascough; M. Schwarz

Description: Institute Meteorology and Climate Research, Karlsruhe Institute of Technology, Garmisch-Partenkirchen 82467, Germany. Variations in the carbon isotopic composition of soil organic matter (SOM) in bulk and fractionated samples were used to assess the influence of C3 and C4 vegetation on SOM dynamics in semi-natural tropical ecosystems sampled along a precipitation gradient in West Africa. Differential patterns in SOM dyna...

Guillet, B., Achoundong, G., Happi, J., Beyala, V., Bonvallot, J., Riera, B., Mariotti, A., and Schwartz, D.: Agreement between floristic and soil organic carbon isotope (13C/12C, 14C) indicators of forest invasion of savannas during the last century in Cameroon, J. Trop. Ecol., 17, 809–832, 2001.; Hall, D. O. and Scurlock, J.: Climate change and productivity of natural grasslands, Ann. Bot.-London, 67, 49–55, 1991.; Harkness, D. D., Harr...

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Responses of N2O and Ch4 Fluxes to Fertilizer Nitrogen Addition Ra...

By: X. Zheng; C. Liu; K. Wang

Description: State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry (LAPC), Institute of Atmospheric Physics, Chinese Academy of Sciences (IAP-CAS), Beijing 100029, China. Model and field studies generally posit that when the application rates of nitrogen fertilizer exceed crop needs, nitrous oxide (N2O) emissions will increase nonlinearly, though linear responses are also extensively reported by field studies. We conducted yea...

Aronson, E. L. and Helliker, B. R.: Methane flux in non-wetland soils in response to nitrogen addition: a meta-analysis, Ecology, 91, 3242–3251, 2010.; Bodelier, P. L. E. and Laanbroek, H. J.: Nitrogen as a regulatory factor of methane oxidation in soils and sediments, FEMS Microbiol. Ecol., 47, 265–277, 2004.; Bouwman, A. F., Boumans, L. J. M., and Batjes, N. H.: Modeling global annual N2O and NO emissions from fertilized fields, Global Biogeochem. Cy., 16, 1...

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Effects of Drought on Nitrogen Turnover and Abundances of Ammonia-...

By: F. Bauer; T. Ladreiter-knauss; S. Kienzl; E.-m. Kastl; L. Fuchslueger; R. Hasibeder; M. Schmitt; M. Schloter; A. Richter; U. Szukics; M. Bahn

Description: Terrestrial Ecosystem Research, Department of Microbiology and Ecosystem Science, University of Vienna, Vienna, Austria. Future climate scenarios suggest an increased frequency of summer drought periods in the European Alpine Region. Drought can affect soil nitrogen (N) cycling, by altering N transformation rates, as well as the abundances of ammonia-oxidizing bacteria and archaea. However, the extent to which drought affects N cycling under in sit...

Allison, S. D. and Martiny, J. B. H.: Resistance, resilience, and redundancy in microbial communities, P. Natl. Acad. Sci. USA, 105, 11512–11519, 2008.; Alves, R., Wanek, W., Zappe, A., Richter, A., Svenning, M., Schleper, C., and Urich, T.: Nitrification rates in Arctic soils are associated with functionally distinct populations of ammonia-oxidizing archaea, ISME J., 1–12, doi:10.1038/ismej.2013.35, 2013.; Auyeung, D. ...

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Global Prediction of Planktic Foraminiferal Fluxes from Hydrograph...

By: S. Mulitza; M. Schulz; S. Žarić

Description: DFG Research Center Ocean Margins, University of Bremen, P. O. Box 330440, 28334 Bremen, Germany. Understanding and quantifying the seasonal and spatial distribution of planktic foraminiferal fluxes reflected in sedimentary assemblages is key to interpret foraminifera-based proxies in paleoceanography. Towards this goal we present an empirical model to predict foraminiferal fluxes on a global scale.

A compilation of plank...

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Biogeochemical Characterization of the Riverine Organic Matter Tra...

By: S. Heussner; A. Sanchez-vidal; W. Ludwig; M. Canals; M. Verdoit-jarraya; A. Calafat; P. Kerhervé; M. Higueras

Description: Univ. Perpignan Via Domitia, Centre de Formation et de Recherche sur les Environnements Méditerranéens, UMR5110, 66860, Perpignan, France. A large amount of terrestrial organic matter is annually delivered by rivers to the continental shelf, where this material is either buried or transferred to the deep sea by hydrodynamic processes such as storms. The relative amount of terrestrial organic matter in the marine sediments is often determined by analy...

Asselman, N.: Fitting and interpretation of sediment rating curves, J. Hydrol., 234, 228–248, 2000.; Aucour, A. M., Sheppard, S. M. F., and Savoye, R.: δ13C of fluvial mollusc shells (Rhône River): a proxy for dissolved inorganic carbon?, Limnol. Oceanogr., 48, 2186–2193, 2003.; Bănaru, D., Harmelin-Vivien, M., Gomoiu, M. T., and Onciu, T. M.: Influence of the Danube River inputs on C and N stable isotope ratios of the Romanian coastal waters and sediment (Bla...

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Evidence for Microbial Dissolution of Pyrite from the Lower Cambri...

By: X.-l. Zhang; W. Liu

Description: State Key Laboratory of the Continental Dynamics, Early life Institute and Department of Geology, Northwest University, Xi'an 710069, China. The oxidative dissolution of the sulphide mineral pyrite (FeS2) has been of significant interest since it affects global geochemical cycles, generates acid mine drainage, and is used in industrial metal extraction. Several different groups of prokaryotes are known to catalyze the dissolution o...

Bennett, J. C. and Tributsch, H.: Bacterial leaching patterns on pyrite surfaces, J. Bacteriol., 134, 310–317, 1978.; Andrews, F. G.: The selective adsorption of Thiobacilli to the dislocation sites on pyrite surfaces, Biotechnol. Bioeng., 31, 378–381, 1988.; Aoki, A: Acid bacterial leaching of pyrite single crystals, in: Biohydrometallurgy and the Environment Toward the Mining of the 21st Century, 9 (part 1), edited by: Amils, R. and Ballester, A., Process Metall...

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Impacts of Land Cover and Climate Data Selection on Understanding ...

By: E. L. Hodson; D. C. Frank; N. E. Zimmermann; B. Poulter

Description: Swiss Federal Research Institute WSL, Dynamic Macroecology, Zürcherstrasse 111, Birmensdorf 8903, Switzerland. Terrestrial and oceanic carbon cycle processes remove ~ 55% of global carbon emissions, with the remaining 45%, known as the airborne fraction, accumulating in the atmosphere. The long-term dynamics of the component fluxes contributing to the airborne fraction are challenging to interpret, but important for informing fossil-fuel emission targets...

Allen, C. D., Macalady, A. K., Chenchouni, H., Bachelet, D., McDowell, N., Vennetier, M., Kitzberger, T., Rigling, A., Breshears, D. D., Hogg, E. H., Gonzalez, P., Fensham, R., Zhang, Z., Castro, J., Demidova, N., Lim, J. H., Allard, G., Running, S. W., Semerci, A., and Cobb, N.: A global overview of drought and heat-induced tree mortality reveals emerging climate change risks for forests, Forest Ecol. Manag., 259, 660–684, 2010.; Arino, O., Bicheron, P., Achard, F., Lat...

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Short-term Response of the Coccolithophore Emiliania Huxleyi to Ab...

By: M. N. Müller; U. Riebesell; J. Barcelos E Ramos

Description: Leibniz Institute of Marine Sciences, IFM-GEOMAR, Düsternbrooker Weg 20, 24105 Kiel, Germany. The response of the coccolithophore Emiliania huxleyi to rising CO2 concentrations is well documented in acclimated cultures where cells are exposed to the CO2 treatments for several generations prior to the experiment. Extended acclimation times have generally been applied because of the lack of information about time required to re...

Barcelos e Ramos, J., Biswas, H., Schulz, K. G., LaRoche, J., and Riebesell, U.: Effect of rising atmospheric carbon dioxide on the marine nitrogen fixer Trichodesmium, Global Biogeochem. Cy., 21, GB2028, doi:2010.1029/2006GB002898, 2007.; Bell, G. and Collins, S.: Adaptation, extinction and global change, Evolutionary Applications, Blackwell Publishing Ltd., 3–16, 2008.; Bijma, J., Spero, H. J., and Lea, D. W.: Reassessing foraminiferal stable isotope geochemistr...

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Does Chlorophyll A Provide the Best Index of Phytoplankton Biomass...

By: F. Bruyant; M. Babin; C. Grob; M. S. Twardowski; Y. Huot; H. Claustre

Description: CNRS, Laboratoire d'Océanographie de Villefranche, 06230 Villefranche-sur-Mer, France. Probably because it is a readily available ocean color product, almost all models of primary productivity use chlorophyll as their index of phytoplankton biomass. As other variables become more readily available, both from remote sensing and in situ autonomous platforms, we should ask if other indices of biomass might be preferable. Herein, we compare the accuracy of ...

Antoine, D., Morel, A., Gordon, H. R., Banzon, V. F., and Evans, R. H.: Bridging ocean color observations of the 1980s and 2000s in search of long-term trends, J. Geophys. Res., 110, C06009, doi:10.1029/2004JC002620, 2005.; Babin, M. and Morel, A.: An incubator designed for extensive and sensitive measurements of phytoplankton photosynthetic parameters, Limnol. Oceanogr., 39, 694–702, 1994.; Babin, M., Morel, A., Claustre, H., Bricaud, A., Kolber, Z., and Falkowski, P. G...

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Contrasting Effects of Temperature and Winter Mixing on the Season...

By: M. Hartman; T. Tyrrell; A. Charalampopoulou; E. P. Achterberg; U. Schuster; C. Dumousseaud; D. J. Hydes

Description: National Oceanography Centre, University of Southampton, European Way, Southampton, SO14 3ZH, UK. Future climate change due to the increase in atmospheric CO2 concentrations is expected to strongly affect the oceans, with shallower winter mixing and consequent reduction in primary productivity and oceanic carbon drawdown in low and mid-latitudinal oceanic regions. Here we test this hypothesis by examining the effects of cold and warm winters o...

Bargeron, C. P., Hydes, D. J., Woolf, D. K., Kelly-Gerreyn, B. A., and Qurban, M. A.: A regional analysis of new production on the northwest European shelf using oxygen fluxes and a ship-of-opportunity, Estuarine, Coastal and Shelf Science, 69, 478–490, 2006.; Bates, N. R.: Interannual variability of the oceanic CO2 sink in the subtropical gyre of the North Atlantic Ocean over the last 2 decades, J. Geophys. Res., 112, C09013, doi:10.1029/2006JC003759, 2007.; ...

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Soil Organic Matter Dynamics in a North America Tallgrass Prairie ...

By: Q. Zhang; Y. Luo; X. Xu; X. Cheng

Description: Key Laboratory of Aquatic Botany and Watershed Ecology, Wuhan Botanical Garden, The Chinese Academy of Sciences, Wuhan 430074, China. The influence of global warming on soil organic matter (SOM) in terrestrial ecosystems remains unclear. In this study, we combined soil fractionation with isotope analyses to examine SOM dynamics after nine years of experimental warming in a North America tallgrass prairie. Soil samples from the control plots and the warme...

An, Y., Wan, S., Zhou, X., Subeda, A., Wallace, L. L., and Luo, Y.: Plant nitrogen concentration, use efficiency, and contents in a tallgrass prairie ecosystem under experimental warming, Glob. Change Biol., 11, 1733–1744, 2005.; Auerswald, K., Wittmer, M. H. O. M., M�nnel, T. T., Bai, Y. F., Schäufele, R., and Schnyder, H.: Large regional-scale variation in C3/C4 distribution pattern of Inner Mongolia steppe is revealed by grazer wool carbon isotope composition, Biogeos...

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