Academic literature on the topic 'Particulate organic carbon'
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Journal articles on the topic "Particulate organic carbon"
Mugica-Á lvarez, Violeta, Sandra Ramos-Guízar, Naxieli Santiago-de la Rosa, Miguel Torres-Rodríguez, and Luis Noreña-Franco. "Black Carbon and Particulate Organic Toxics Emitted by Sugarcane Burning in Veracruz, México." International Journal of Environmental Science and Development 7, no. 4 (2016): 290–94. http://dx.doi.org/10.7763/ijesd.2016.v7.786.
Full textTiwari, Neha, and Namita Joshi. "Carbon Management Index and Soil Organic Carbon pools of Different land use in Uttarakhand, Western Himalaya." Current World Environment 17, no. 3 (December 30, 2022): 585–91. http://dx.doi.org/10.12944/cwe.17.3.7.
Full textKumari, Radha Karuna, and P. M. Mohan. "Review on Dissolved Organic Carbon and Particulate Organic Carbon in Marine Environment." ILMU KELAUTAN: Indonesian Journal of Marine Sciences 23, no. 1 (March 3, 2018): 25. http://dx.doi.org/10.14710/ik.ijms.23.1.25-36.
Full textJanning, K. F., K. Mesterton, and P. Harremoës. "Hydrolysis and degradation of filtrated organic particulates in a biofilm reactor under anoxic and aerobic conditions." Water Science and Technology 36, no. 1 (July 1, 1997): 279–86. http://dx.doi.org/10.2166/wst.1997.0065.
Full textZhu, Gen Hai, Yan Lan Liu, Li Hong Chen, Pei Song Yu, Mao Jin, and Zi Lin Liu. "Studies on Phytoplankton and Particulate Organic Carbon in the Southern Ocean." Applied Mechanics and Materials 137 (October 2011): 344–52. http://dx.doi.org/10.4028/www.scientific.net/amm.137.344.
Full textShukla, Pravesh Chandra, Tarun Gupta, Nitin Kumar Labhsetwar, and Avinash Kumar Agarwal. "Development of low cost mixed metal oxide based diesel oxidation catalysts and their comparative performance evaluation." RSC Advances 6, no. 61 (2016): 55884–93. http://dx.doi.org/10.1039/c6ra06021h.
Full textSaavedra-Hortua, Daniel A., Daniel A. Friess, Martin Zimmer, and Lucy Gwen Gillis. "Sources of Particulate Organic Matter across Mangrove Forests and Adjacent Ecosystems in Different Geomorphic Settings." Wetlands 40, no. 5 (February 6, 2020): 1047–59. http://dx.doi.org/10.1007/s13157-019-01261-9.
Full textGaly, Valier, and Christian France-Lanord. "Particulate organic carbon transport during Himalayan erosion." Geochimica et Cosmochimica Acta 70, no. 18 (August 2006): A191. http://dx.doi.org/10.1016/j.gca.2006.06.385.
Full textGuzmán-Uria, Fabiola, Isabel Morales-Belpaire, Dario Achá, and Marc Pouilly. "Particulate Mercury and Particulate Organic Matter in the Itenez Basin (Bolivia)." Applied Sciences 10, no. 23 (November 26, 2020): 8407. http://dx.doi.org/10.3390/app10238407.
Full textSchartau, M., A. Engel, J. Schröter, S. Thoms, C. Völker, and D. Wolf-Gladrow. "Modelling carbon overconsumption and the formation of extracellular particulate organic carbon." Biogeosciences 4, no. 4 (July 2, 2007): 433–54. http://dx.doi.org/10.5194/bg-4-433-2007.
Full textDissertations / Theses on the topic "Particulate organic carbon"
Kommedal, Roald. "Degradation of polymeric and particulate organic carbon in biofilms." Doctoral thesis, Norwegian University of Science and Technology, Faculty of Natural Sciences and Technology, 2003. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-3.
Full textPolymeric and particulate organic carbon (POM) are fundamental compounds in the global cycling of carbon, and constitute significant amounts of BOD in municipal wastewater.
The main objective of this work is to study molecular size effects on degradation dynamics in biofilm systems. Specifically, the effect of substrate molecular weight on degradation kinetics and transport dynamics, location of depolymerisation enzyme activity and depolymerisation intermediate formation dynamics are assessed. A mathematical model for biofilm degradation dynamics is presented, and used for data interpretation and simulations.
Dextran, an -1,6 Glucan, was used as model substrate during batch degradation in a Rototorque biofilm reactor, in addition to batch tests on biofilm sub samples retrieved from the Rototorque, and during pure endo- and exo-Dextranase studies. Oxygen utilisation rate (OUR) estimates and bulk phase TOC mass balances were used to evaluate the effect of variable initial molecular weight on the observed half order removal coefficient (Harremoës, 1978; Rittmann and McCarty, 1980). Size exclusion-HPLC analysis for determination of bulk phase depolymerisation intermediates, and specific enzyme assays were used to evaluate transport dynamics of polymers and location of enzyme activity in the enhanced mixed population biofilm system.
Dextran removal rate decrease with increasing Dextran molecular weight. The observed areal half order removal rate coefficient, k1/2,A, demonstrate an approximate 10-fold decrease in the 1-500 kDa range, showing negative logarithmic correlation to the initial MW of Dextran. A less distinct correlation is observed above this transition limit (1-10 MDa). Evaluation of the Thiele moduli, from one step depolymerisation modelling, suggests that the logarithmic reduction in observed removal rate is caused by combined reaction rate and transport limitations. Transport limitations dominates as the polymeric substrate size increase and hinders biofilm matrix diffusion, and the removal rate becomes a surface limited process. Removal of Dextran is biomass dependent in what appears to be a non-linear dependency on biofilm thickness. Expressed as biomass areal density (g/m2), no depolymerisation is observed for thin biofilms (0.7 g/m2), slow for medium (3.7 g/m2) and high for thicker biofilms (5.2 g/m2).
Depolymerisation intermediates accumulated in the bulk phase over the entire Dextran size range during pure Dexranase studies, with even size distributions. Final products were oligo-isomaltoses (DP 2-6). Dextran was not depolymerised by -Glucosidase nor Oligo-1,6 Glucosidase. During biofilm reactor and slide sub-sample tests, low MW Dextran intermediates (1-10 kDa) accumulated in the bulk during depolymerisation of 160 kDa Dextran at 250 and 200 mg/l initial concentrations, but were not detected during experiments with 100 mg/l initial concentrations. Intermediate range Dextran (10-100 kDa) did not accumulate in either case. At the same conditions, some assimilable range Dextran (0.2-0.9 kDa) accumulated in the bulk liquid during initial 250 and 200 mg/l batches, but was not detected during 100 mg/l initial Dextran concentrations. The extent of bulk phase accumulation seems to depend on the biofilm growth rate, where more bulk phase accumulation is observed during experiments with starved compared to more actively growing biofilms. More intermediates accumulate during low MW initial standards, compared to higher. These observations indicate that the extent of bulk phase intermediate accumulation is balanced by the rate of depolymerisation, and the substrate uptake rate (growth). Accumulation of intermediate hydrolysis products in biofilm systems is therefore dependent on the slowly biodegradable organic (SBCOD) loading rate.
Dextranase was detected in the cellular fraction of the biofilms. The enzyme activity was not detected in any other biofilm sub compartments, implying that the exogenous enzyme remains attached to the cells while working on polymers. These findings support the conceptual model of Confer and Logan (1998), implying that bulk phase intermediate accumulation observed in this study and by others, is not a result of enzymatic activity in the bulk phase, but transport of intermediates from the biofilm matrix.
Sparkes, Robert Bryon. "Marine sequestration of particulate organic carbon from mountain belts." Thesis, University of Cambridge, 2013. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.607829.
Full textSmith, Joanne Caroline. "Particulate organic carbon mobilisation and export from temperate forested uplands." Thesis, University of Cambridge, 2013. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.648250.
Full textJorge, Danilo Custódio. "Particulate carbon in the atmosphere: distribution aging and wet deposition." Doctoral thesis, Universidade de Aveiro, 2016. http://hdl.handle.net/10773/16829.
Full textDuring the last decades a significant number of studies was performed about the cycling of carbonaceous matter in the atmosphere. Despite the efforts of the scientific community, a full understanding about the composition and formation of carbonaceous aerosol in ambient air was not yet achieved, reflecting the great variety of emitting sources and the complexity of transformation processes in the atmosphere. In addition, very little is known about a specific type of carbonaceous aerosol: the indoor carbonaceous aerosol. Removal of particulate carbonaceous matter from the atmosphere is another component of the carbon cycle that has received poor attention from researchers. The main aim of this work was to contribute to a better understanding of the sources, transformation processes and removal of atmospheric carbonaceous matter. Particulate matter, organic carbon (OC) and elemental carbon (EC) concentrations were measured simultaneously in the indoor and outdoor air of residences located in urban and sub-urban areas of northwestern Mainland Portugal. Average indoor to outdoor ratios (I/O) for OC were higher than 1 in occupied residences, showing that indoor sources, such as cooking, smoking, biomass burning and movement of people, strongly influenced indoor OC concentrations. In contrast, I/O ratios for EC were close to 1, except for a smokers’ residence, suggesting that indoor concentrations were mainly controlled by outdoor sources, most likely from vehicular emissions and biomass burning. Aerosol composition was also evaluated during one year in a kerbside site located in a busy road of Oporto. Road traffic, local dust and biomass burning were found to be the most important sources of aerosol particles. Most of the aerosol constituents exhibited well-defined temporal variations, which were related with the seasonal variability of source strengths, atmospheric processes and climatic conditions. In addition, precipitation samples were collected and characterized for chemical constituents at a background site in the Azores Islands and an urban site in the city of Oporto. Transport from continental areas bordering the North Atlantic Ocean were the main source of EC in the Azores. Both local emissions and long-range transport explained the levels of water soluble organic carbon found in the same samples. Concentrations of carbonaceous matter in Oporto were considerably higher than those measured before in other background areas in Portugal, indicating a significant atmospheric contamination by anthropogenic activities.
Nas últimas décadas foram desenvolvidos vários estudos sobre a circulação atmosférica da matéria carbonácea. Contudo, apesar dos esforços da comunidade científica, não se conseguiu ainda compreender detalhadamente a composição e a formação do aerossol carbonáceo no ar ambiente, o que reflete a grande variedade de fontes emissoras e a complexidade dos processos de transformação que ocorrem na atmosfera. Acresce ainda que se sabe muito pouco sobre um caso particular do aerossol de carbono: as partículas carbonáceas em suspensão no ar interior. Outra componente do ciclo do carbono que tem merecido pouca atenção da comunidade científica é a remoção das partículas carbonáceas da atmosfera. Este trabalho tem como objetivo principal contribuir para um melhor conhecimento sobre as fontes, processos de transformação e remoção da matéria carbonácea presente na atmosfera. As concentrações de matéria particulada, carbono orgânico (CO) e carbono elementar (CE) foram medidas simultaneamente no ar interior e exterior de residências localizadas em áreas urbanas e sub-urbanas da região nordeste de Portugal Continental. Os valores médios da razão entre as concentrações no ar interior e exterior (I/E) para o CO foram superiores a 1 para as residências com ocupantes, mostrando que as fontes interiores, como a confeção de alimentos, a queima de biomassa e o movimento de pessoas, influenciaram fortemente os teores de CO. Pelo contrário, obtiveram-se valores médios próximos de 1 para a razão I/E do CE, excluindo uma residência de fumadores, sugerindo que as concentrações deste componente eram controladas por fontes externas, muito provavelmente o tráfego automóvel e a queima de biomassa. A composição do aerossol foi também avaliada durante um ano num local confinante com uma estrada de tráfego intenso na cidade do Porto. Verificou-se que as principais fontes emissoras de partículas eram o tráfego automóvel, as poeiras do solo e a queima de biomassa. Muitos dos constituintes do aerossol mostraram variações temporais bem marcadas, as quais foram relacionadas com a variabilidade sazonal das fontes emissoras, dos processos atmosféricos e das condições climáticas. Procedeu-se ainda à recolha de amostras de precipitação e posterior caracterização química num local de fundo do arquipélago dos Açores e num local urbano da cidade do Porto. A principal fonte do CE nos Açores é o transporte a longas distâncias a partir das áreas continentais que envolvem o Atlântico Norte. Os teores de carbono orgânico insolúvel tiveram origem tanto em emissões locais como no transporte a longas distâncias. As concentrações de matéria carbonácea no Porto mostraram-se substancialmente superiores às que tinham sido medidas em áreas remotas de Portugal, indicando uma contaminação significativa por atividades antropogénicas.
Puigcorbé, Lacueva Viena. "Use of 234Th:238U disequilibrium to estimate particulate organic carbon export in the upper ocean." Doctoral thesis, Universitat Autònoma de Barcelona, 2016. http://hdl.handle.net/10803/399280.
Full textThe particulate export of photosynthetically fixed carbon from the surface ocean to the ocean interior by marine plankton is a key component of the biological carbon pump and, by extension, of the global carbon cycle as it helps to maintain atmospheric CO2 levels lower than would occur with out this process (Feely et al., 2001; Khatiwala et al., 2009; Parekh et al., 2006). Particle cycling and export are also essential for the biogeochemical cycles of other major nutrients and chemical species of vital importance for marine biota, as well as anthropogenic metals and pollutans. The radiotracer pair 234Th: 238U as been commonly and extensively used to study particle export and determine the strength of the biological carbon pump in the upper ocean (Coale and Bruland, 1985; Le Moigne et al., 2013b). This thesis evaluates oceanic carbon export fluxes and the efficiency of the biologically mediated uptake of atmospheric CO2 using this naturally occurring radiotracer pair in a variety of regimes under contrasting biogeochemical conditions. First, basin-scale export variability was examined in the North Western Atlantic Ocean along a latitudinal transect (from 64ºN to the equator) with high spatial resolution, providing additional data in under sampled areas. The results agreed with previous studies carried out in the North Atlantic and were also compared with different satellite-derived export models. These models have a strong dependence on sea surface temperature and net primary productivity estimates, but they usually do not consider biological parameters that influence carbon export, such as the trophic structure, the grazing intensity, the recycling efficiency, the bacterial activity and the dissolved organic carbon export (Maiti et al., 2013). The differences observed between the satellite-derived and the 234Th-derived carbon export estimates highlights the necessity to include such biological parameters at a regional scale, for which continued observing efforts are needed. This would thereby reduce uncertainty in the global carbon budget and improve carbon cycle monitoring from satellite-based platforms. Second, the zonation of surface properties derived from the various fronts crossed along a 10ºE transect, from 44ºS to 53ºS, in the Antarctic Circumpolar Current were evaluated in relation to particle export. Our results show that, despite the contrasting food webs encountered north and south of the Antarctic Polar Front (~49ºS), the magnitude of the carbon export fluxes were similar along the transect. However, differences appeared when examining transfer efficiencies: in the northern section, which was dominated by nanophytoplankton, presented high export efficiencies and reduced transfer efficiencies in comparison to the southern section, dominated by microphytoplankton. Thus, and although different food web regimes led to similar export of carbon, the sinking particle pools differed in their composition north and south of the Antarctic Polar Front (aggregates of small particles in the north vs fast-sinking large particles in the south), resulting in two different scenarios regarding the amount of exported carbon that reached greater depths. Finally, estimates of particle flux and export efficiency were examined in a semi-enclosed basin (Gulf of California and the surrounding waters of the Eastern Tropical North Pacific), with a strong seasonality that leads to changes in the planktonic community. Export estimates were assessed using the 234Th approach in combination with surface-tethered sediment traps. Data on size fractionation and high vertical resolution of in situ pump deployments allowed a comparison of the C/234Th ratios attenuation with depth between small (1-53 μm) and large (>53 μm) particles. Results indicate that, under dominance of pico- and nanoplankton and with presence of diazotrophs, small particles play and important role in carbon export and that this export might be more efficient than that resulting from a diatom dominated planktonic community in the study area.
Perez-Castillo, Fernando. "Sedimentation of organic matter on the Hebridean slope." Thesis, Bangor University, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.287026.
Full textFord, William Isaac III. "PARTICULATE ORGANIC CARBON FATE AND TRANSPORT IN A LOWLAND, TEMPERATE WATERSHED." UKnowledge, 2011. http://uknowledge.uky.edu/gradschool_theses/647.
Full textBoubnov, Pavel Vladimirovitch. "Particulate organic carbon variability in the subarctic Pacific based on transmissometer data." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2001. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/MQ58527.pdf.
Full textBelcher, Anna Christine. "Controls on the attenuation of sinking particulate organic carbon in the mesopelagic." Thesis, University of Southampton, 2016. https://eprints.soton.ac.uk/407492/.
Full textNicoloso, Rodrigo da Silveira. "Estoques e mecanismos de estabilização do carbono orgânico do solo em agroecossistemas de clima temperado e sub-tropical." Universidade Federal de Santa Maria, 2009. http://repositorio.ufsm.br/handle/1/3574.
Full textSoil carbon (C) sequestration in agriculture soil is a low cost option to mitigate global climatic change. No-till (NT) associated with good husbandry practices could compensate up to 15% of the anthropogenic CO2 emissions by storing the C from atmosphere as soil organic carbon (SOC). To be fully accepted as a mitigation alternative, research must be conducted to improve the accuracy of soil C sequestration estimates on field experiments as well as those made by mathematical models at regional and local scales. Complementarily, is necessary to improve the knowledge about the SOC stabilization mechanisms, delimiting the real soil´s capacity into accumulate C, quantifying how much of the stored C could be re-emitted to the atmosphere by changes in soil management. The present work is divided in four chapters with the objective to answer these questions. The first chapter has the objective to discuss the importance of sampling depth (0-0.30, 0-0.60, and 0-0.90 m) and the definition of a reliable and adequate baseline for the calculation of the C sequestration rates. Two long-term field experiments from a temperate (Mollisol) and a sub-tropical (Oxisol) climate soil were selected for this research. The experiments tested soil tillage systems (conventional tillage (CT) and NT) (Mollisol and Oxisol) and sources and rates of nitrogen amendment on corn in the Mollisol (control without N, 168 kg N ha-1 as ammonium sulfate, and 168 kg N ha-1 as organic fertilizer) and different crop rotation systems in the Oxisol (R0:soybean-wheat, R1:soybean-wheat-soybean-oat, and R2:soybean-oat-soybean-oat+vetch-corn-radish-wheat). The increase of sampling depth provided limited contribution to the estimates of C sequestration rates due to the increase of the error on SOC stocks estimates at deeper soil depths. To improve the C sequestration rate estimates, SOC temporal dynamic analysis should be preferred rather than the comparison of the SOC stocks of paired plots at a unique time point. The second chapter had the objective to apply simple mathematical equations to describe the SOC dynamics and improve the estimates of C sequestration rates and also to understand the role of the macroaggregate formation on SOC accumulation and saturation. The use of linear and kinetic (exponential growth) equation was adequate to describe the SOC dynamics increasing the accuracy of the C sequestration rate estimates by reducing errors promoted by soil spatial variability. The SOC accumulation was a function of the amount of C input to the soil and the macroaggregate formation to protect SOC. The SOC saturation process occurred from the smaller to the larger aggregate size fraction, limiting the capacity of a given superficial soil layer to accumulate SOC. However, the SOC saturation at superficial soil layers did not indicate the end of C sequestration in the soil, since the SOC accumulation occurred at sub-superficial soil layers. In the third chapter, the mathematical approach to determine changes on SOC stocks and the SOC saturation-induced limitation for C sequestration were applied to improve the accuracy of the Hénin e Dupuís (1945) one- 8 compartmental mathematical model into predict future soil C sequestration rates. The long-term field experiment from the Mollisol was selected for this research because of the better data availability (sampling years) and also by the presence of two treatments under CT and NT with SOC saturated soil layers. The mathematical adjustment (by linear equations) of the SOC dynamic coefficients improved the adjustment of the model‟s predictions. The SOC saturation-induced restriction for SOC accumulation on the mathematical model avoided the overestimation of the soil‟s potential for C sequestration. The predictions of the mathematical models indicate that the Mollisol‟s superficial layer (0-0.05 m) under NT could maintain significant C sequestration rates for up to 50 years as a function of the amount of C input to the soil. For the fourth chapter, a detailed study of the SOC pools in water-stable aggregate size fractions by granulometric and densimetric fractionation was carried out. The objective was to identify the pools where SOC accumulation was occurring and what SOC stabilization mechanisms were present. This will provide estimates of the NT potential to promote long-term C sequestration. SOC accumulation occurred preferentially in the more stable and recalcitrant SOC fractions (Mollisol and Oxisol) or in microaggregate and macroaggregate physically protected fractions (Mollisol). In the Oxisol, the SOC enrichment occurred mostly in the mineral associated-SOC fractions extra-microaggregates occluded within meso- and macroaggregates, while in the Mollisol, the SOC accumulation occurred in both intra- and extra-microaggregate mineral associated-SOC fractions. More than 78 and 92% of the C sequestration verified in the Mollisol and Oxisol, respectively, were considered as long-term by occurring in stable SOC fractions.
O seqüestro de carbono (C) em solos agrícolas é uma opção de baixo custo para mitigação das mudanças climáticas globais. O plantio direto (PD), associado a boas práticas agronômicas, pode compensar até 15% das emissões antrópicas de CO2 ao armazenar o C drenado da atmosfera na forma de carbono orgânico (CO) do solo. Para ser amplamente aceito como alternativa de mitigação, pesquisas devem ser conduzidas a fim de melhorar a precisão das estimativas de taxas de seqüestro de C em experimentos de campo, assim como as previsões feitas por modelos matemáticos em escalas regionais e locais. Complementarmente, é necessário aprimorar o conhecimento sobre os mecanismos de estabilização do CO, delimitando a capacidade real do solo em acumular C e quantificando quanto do C acumulado no solo pode ser re-emitido para atmosfera por mudança no manejo do solo. Desta maneira, o presente trabalho se divide em quatro capítulos com o objetivo de abordar estas questões. O primeiro capítulo tem por objetivo discutir a importância da profundidade de amostragem (0-0,30; 0-0,60; 0-0,90 m) e da definição de situações de linhas-base confiáveis a adequadas para o cálculo das taxas de seqüestro de C. Para isto, foram utilizados dois experimentos de longa duração sobre um solo de clima temperado (Mollisol) e outro de clima sub-tropical (Oxisol). Os experimentos testaram efeitos de sistema de preparo do solo (preparo convencional (PC) e PD) (Mollisol e Oxisol) e fontes e doses de nitrogênio para o milho no Mollisol (testemunha (T), 168 kg N ha-1 na forma de sulfato de amônia (AM) e 168 kg N ha-1 na forma de adubo orgânico (AO)) e diferentes sistemas de rotação de culturas no Oxisol (R0:soja-trigo, R1:soja-trigo-soja-aveia e R2:soja-aveia-soja-aveia+ervilhaca-milho-nabo-trigo). O aumento da profundidade de amostragem não contribuiu com a melhoria das estimativas de taxas de seqüestro de C devido ao aumento do erro nas estimativas dos estoques de CO nas camadas mais profundas de solo. Para melhoria das estimativas das taxas de seqüestro de C devem-se preferir análises temporais da dinâmica do CO no solo ao invés da comparação de estoques de CO em um único momento. O segundo capítulo tem por objetivo aplicar equações matemáticas simples para descrever a dinâmica do CO e melhorar as estimativas taxas de seqüestro de C e também entender o papel da formação de macroagregados no acúmulo e saturação de CO no solo. O uso de equações lineares e cinéticas (crescimento exponencial) foi adequado para descrever a dinâmica do CO, aumentando a precisão das estimativas de taxas de seqüestro de C ao reduzir os erros de estimativa por variabilidade espacial do solo. O acúmulo de CO no solo mostrou-se uma função da quantidade de C aportada ao solo por resíduos vegetais e a formação de macroagregados no solo para proteção do CO. O processo de saturação do solo ocorreu das menores para as maiores frações de agregados do solo, limitando a capacidade de uma 6 determinada camada de solo em acumular CO. No entanto, verificou-se que a saturação de camadas superficiais de solo não indica o fim do seqüestro de C neste solo, visto que o acúmulo de CO passa a ocorrer em camadas sub-superficiais. No terceiro capítulo, a aproximação matemática para determinar mudanças nos estoques de CO e a limitação na capacidade do solo em acumular CO promovida pelo processo de saturação dos agregados do solo foram aplicados para melhorar a precisão do modelo matemático uni-compartimental de Hénin e Dupuís (1945) em prever futuras taxas de seqüestro de C. O Mollisol foi escolhido para este estudo em função da maior disponibilidade de dados (anos de amostragem) e também pela presença de dois tratamentos em PC e PD com camada de solo saturada por CO. O ajuste matemático (por equações lineares) dos coeficientes da dinâmica do CO melhorou o ajuste das previsões do modelo com os dados observados. A restrição do modelo matemático quanto à capacidade do solo em acumular CO (saturação de CO) evitou a superestimação do potencial de seqüestro de C deste solo. As previsões do modelo matemático indicam que a camada superficial (0-0,05 m) do solo sob PD pode apresentar taxas significativas de seqüestro de C por até 50 anos, em função da quantidade de C adicionada ao solo. No quarto capítulo, foi realizado um estudo detalhado dos compartimentos do CO em função da sua distribuição em classes de tamanhos de agregados estáveis em água e o fracionamento granulométrico e densimétrico do CO. O objetivo foi identificar em quais compartimentos está ocorrendo o acúmulo de CO no solo, os mecanismos de estabilização do CO, estimando o potencial do PD em promover sequestro de C de longa duração. Verificou-se que o acúmulo de C ocorre preferencialmente em frações mais estáveis e recalcitrantes do CO (Mollisol e Oxisol) ou em frações protegidas fisicamente por micro e macroagregados (Mollisol). No Oxisol, o enriquecimento de CO ocorre principalmente nas frações de CO associadas aos minerais extra-microaggregados oclusas em meso e macroagregados de solo, enquanto que no Mollisol, o acumulo de CO ocorre tanto na fração intra como extra microagregados. Mais de 78 e 92% do seqüestro de C verificado no Mollisol e Oxisol, repectivamente, foi considerado de longa duração por ocorrer em frações estáveis do CO.
Books on the topic "Particulate organic carbon"
Wetz, Jennifer Jarrell. Particulate and dissolved organic carbon and nitrogen data from the GLOBEC long-term observation program, 1997-2004. Corvallis, Or: College of Oceanic and Atmospheric Sciences, Oregon State University, 2006.
Find full textWetz, Jennifer Jarrell. Pump station data report for the May 2001, August 2001 and January 2003 COAST cruises: Nutrients, extracted chlorophyll, and dissolved and particulate organic carbon and nitrogen. Corvallis, Or: College of Oceanic and Atmospheric Sciences, Oregon State University, 2005.
Find full textSchneider, Birgit. Variable C:N ratios of particulate organic matter and their influence on the marine carbon cycle =: Variable C:N-Verhältnisse von partikulärem organischen Material und deren Einfluss auf den marinen Kohlenstoffhaushalt. Bremerhaven: Alfred-Wegener-Institut für Polar- und Meeresforschung, 2003.
Find full textPatrick, Graham. Organic Chemistry: A Very Short Introduction. Oxford University Press, 2017. http://dx.doi.org/10.1093/actrade/9780198759775.001.0001.
Full textShi, Z. J., and Z. N. Gu. New phenomena in the nanospace of single-wall carbon nanotubes. Edited by A. V. Narlikar and Y. Y. Fu. Oxford University Press, 2017. http://dx.doi.org/10.1093/oxfordhb/9780199533053.013.12.
Full textHarrison, Mark. Respiratory. Oxford University Press, 2017. http://dx.doi.org/10.1093/med/9780198765875.003.0048.
Full textBhananker, Sanjay, and Paul Bhalla. Burns. Edited by Kirk Lalwani, Ira Todd Cohen, Ellen Y. Choi, and Vidya T. Raman. Oxford University Press, 2018. http://dx.doi.org/10.1093/med/9780190685157.003.0062.
Full textBook chapters on the topic "Particulate organic carbon"
Xu, Kai, Kunshan Gao, Fei-xue Fu, and David A. Hutchins. "Measurements of Particulate Organic Carbon, Nitrogen, and Phosphorus." In Research Methods of Environmental Physiology in Aquatic Sciences, 259–63. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-5354-7_30.
Full textShen, Zhiliang, Heming Yang, and Qun Liu. "Particulate Organic Carbon and Its Composition in Jiaozhou Bay." In Studies of the Biogeochemistry of Typical Estuaries and Bays in China, 227–35. Berlin, Heidelberg: Springer Berlin Heidelberg, 2019. http://dx.doi.org/10.1007/978-3-662-58169-8_14.
Full textWassmann, P., E. Bauerfeind, M. Fortier, M. Fukuchi, B. Hargrave, B. Moran, T. Noji, et al. "Particulate Organic Carbon Flux to the Arctic Ocean Sea Floor." In The Organic Carbon Cycle in the Arctic Ocean, 101–38. Berlin, Heidelberg: Springer Berlin Heidelberg, 2004. http://dx.doi.org/10.1007/978-3-642-18912-8_5.
Full textSchlitzer, R., R. Usbeck, and G. Fischer. "Inverse Modeling of Particulate Organic Carbon Fluxes in the South Atlantic." In The South Atlantic in the Late Quaternary, 1–19. Berlin, Heidelberg: Springer Berlin Heidelberg, 2003. http://dx.doi.org/10.1007/978-3-642-18917-3_1.
Full textRachold, V., and H. W. Hubberten. "Carbon Isotope Composition of Particulate Organic Material in East Siberian Rivers." In Land-Ocean Systems in the Siberian Arctic, 223–38. Berlin, Heidelberg: Springer Berlin Heidelberg, 1999. http://dx.doi.org/10.1007/978-3-642-60134-7_21.
Full textBloesch, J., and M. Sturm. "Settling Flux and Sinking Velocities of Particulate Phosphorus (PP) and Particulate Organic Carbon (POC) in Lake Zug, Switzerland." In Sediments and Water Interactions, 481–90. New York, NY: Springer New York, 1986. http://dx.doi.org/10.1007/978-1-4612-4932-0_42.
Full textGiani, Michele, Fabio Savelli, and Alfredo Boldrin. "Temporal variability of particulate organic carbon, nitrogen and phosphorus in the Northern Adriatic Sea." In The Interactions between Sediments and Water, 319–25. Dordrecht: Springer Netherlands, 2003. http://dx.doi.org/10.1007/978-94-017-3366-3_44.
Full textAsper, Vernon, and Walker O. Smith. "The distribution of particulate organic carbon and its dynamics in the southern Ross Sea." In Biogeochemistry of the Ross Sea, 235–41. Washington, D. C.: American Geophysical Union, 2003. http://dx.doi.org/10.1029/078ars15.
Full textFukushima, Keitaro, Naoko Tokuchi, Hiromitsu Samejima, Jason Hon, and Yuichi Kano. "Spatial Variations in Dissolved and Particulate Organic Carbon in the Kemena and Tatau Rivers, Sarawak." In Advances in Asian Human-Environmental Research, 217–33. Singapore: Springer Singapore, 2019. http://dx.doi.org/10.1007/978-981-13-7513-2_12.
Full textAiroldi, L., A. J. Southward, I. Niccolai, and F. Cinelli. "Sources and Pathways of Particulate Organic Carbon in a Submarine Cave with Sulphur Water Springs." In The Interactions Between Sediments and Water, 353–62. Dordrecht: Springer Netherlands, 1997. http://dx.doi.org/10.1007/978-94-011-5552-6_37.
Full textConference papers on the topic "Particulate organic carbon"
Keskitalo, K., L. Bröder, D. Jong, N. Zimov, A. Davydova, S. Davydov, T. Tesi, et al. "Degradation of Particulate Organic Carbon in the Kolyma River." In 29th International Meeting on Organic Geochemistry. European Association of Geoscientists & Engineers, 2019. http://dx.doi.org/10.3997/2214-4609.201902744.
Full textClose, Hilary, and Lillian Henderson. "Carbon isotope ratios of particulate organic carbon in the lower euphotic zone." In Goldschmidt2021. France: European Association of Geochemistry, 2021. http://dx.doi.org/10.7185/gold2021.7984.
Full textYanhong, Xu, He Yuxin, Sun Yongge, and Pang Jiali. "The Contribution from Particulate Organic Carbon (Poc) to Dissolved Organic Carbon (Doc) in Eutrophic Lake Taihu, China." In 29th International Meeting on Organic Geochemistry. European Association of Geoscientists & Engineers, 2019. http://dx.doi.org/10.3997/2214-4609.201902927.
Full textQuan, Guixiang, and Jinlong Yan. "Particulate Organic Carbon and Mineral-Associate Organic Carbon in Soils of Different Ecologic Zones of a Coastal Wetland." In 2009 International Conference on Environmental Science and Information Application Technology, ESIAT. IEEE, 2009. http://dx.doi.org/10.1109/esiat.2009.215.
Full textBlair, Neal. "The Evolution of the Fluvial Storm Pulse Particulate Organic Carbon Signal." In Goldschmidt2022. France: European Association of Geochemistry, 2022. http://dx.doi.org/10.46427/gold2022.11120.
Full textZui, Tao, Lv Tingting, Zhou Xiang, Ma Sheng, and Kong Xiangbing. "Monitoring of sinking flux of ocean particulate organic carbon using remote sensing methods." In IGARSS 2016 - 2016 IEEE International Geoscience and Remote Sensing Symposium. IEEE, 2016. http://dx.doi.org/10.1109/igarss.2016.7729982.
Full textLiu, Dong, Qiankun Zhu, Jianyu Chen, Fang Gong, and Ji-An Wei. "The spatial-temporal distribution of particulate organic carbon in the Pearl River Estuary." In SPIE Remote Sensing, edited by Charles R. Bostater, Stelios P. Mertikas, and Xavier Neyt. SPIE, 2015. http://dx.doi.org/10.1117/12.2193587.
Full textLu, Xiaomei, and Yongxiang Hu. "Estimation of particulate organic carbon in the ocean from space-based polarization lidar measurements." In SPIE Asia Pacific Remote Sensing, edited by Robert J. Frouin, Delu Pan, and Hiroshi Murakami. SPIE, 2014. http://dx.doi.org/10.1117/12.2076612.
Full textBawase, Moqtik Ashok, Amita Baikerikar, and M. R. Saraf. "Contribution of Organic and Elemental Carbon Fractions in Indian in-Used Vehicle-Exhaust Particulate Matter." In Symposium on International Automotive Technology 2015. 400 Commonwealth Drive, Warrendale, PA, United States: SAE International, 2015. http://dx.doi.org/10.4271/2015-26-0107.
Full textNorthrop, William F., Darrick Zarling, and Xuesong Li. "Considerations in Using Photometer Instruments for Measuring Total Particulate Matter Mass Concentration in Diesel Engine Exhaust." In ASME 2017 Internal Combustion Engine Division Fall Technical Conference. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/icef2017-3640.
Full textReports on the topic "Particulate organic carbon"
Schilling, J. B. Extraction of semivolatile organic compounds from high-efficiency particulate air (HEPA) filters by supercritical carbon dioxide. Office of Scientific and Technical Information (OSTI), September 1997. http://dx.doi.org/10.2172/658267.
Full textCai, H., and M. Wang. Estimation of Emission Factors and Particulate Black Carbon and Organic Carbon from Stationary, Mobile, and Non-point Sources in the United States for Incorporation into GREET. Office of Scientific and Technical Information (OSTI), September 2014. http://dx.doi.org/10.2172/1155133.
Full textBuesseler, K. O., S. B. Moran, and J. E. Bauer. Transformation rates and fate of dissolved, colloidal and particulate forms of organic carbon in ocean margins. Final report, May 1, 1992--April 30, 1995. Office of Scientific and Technical Information (OSTI), June 1997. http://dx.doi.org/10.2172/491422.
Full textBuesseler, K. O., S. B. Moran, J. E. Bauer, and E. R. M. Druffel. Transformation rates and fate of dissolved, colloidal and particulate forms of organic carbon in ocean margins. Final report, May 1, 1992--April 3, 1995. Office of Scientific and Technical Information (OSTI), November 1998. http://dx.doi.org/10.2172/666224.
Full textSchmidt, Mark. Dynamics and variability of POC burial in depocenters of the North Sea (Skagerrak), Cruise No. AL561, 2.08.2021 – 13.08.2021, Kiel – Kiel, APOC. GEOMAR Helmholtz Centre for Ocean Research Kiel, 2021. http://dx.doi.org/10.3289/cr_al561.
Full textBauer, J., and E. Druffel. Final Report: Sources and Turnover Times of Dissolved Colloidal and Particulate Organic Carbon in the Middle Atlantic Bight and Chesapeake Bay, May 1, 1994 - June 30, 1998. Office of Scientific and Technical Information (OSTI), June 1998. http://dx.doi.org/10.2172/763214.
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