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Rozprawy doktorskie na temat „Global ocean biogeochemical model”

Autor: Grafiati

Data publikacji: 3 czerwca 2025

Data aktualizacji: 31 lipca 2025

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1

Manighetti, Barbara. "The glacial to holocene sedimentary regime in the Northeast Atlantic Ocean." Thesis, University of Cambridge, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.308359.

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Maggiorano, Anna. "Solar radiation penetration in biogeochemical model of the coastal ocean. Numerical experiments." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2017. http://amslaurea.unibo.it/13542/.

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This study focus on the analysis of different algorithms used to describe underwater light attenuation in the coastal ocean and their impact on primary production processes in a numerical coupled model of the marine biogeochemical dynamics. Light parameterizations (novel and literature based) were embedded into the BFM-POM one dimensional modelling system. Results indicated that better representation of the light vertical profiles are obtained with a double exponential formulation, particu- larly when parameterized on the basis of extensive in situ data. Better representation of the light env

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3

Arcamone, Roberto. "Hurricane induced changes in the ocean ecosystem with a coupled physical-biogeochemical model." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2021.

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A thesis work is presented in which a coupled model of physics and biogeochemistry, BFM17-POM1D, is used in order to simulate the ocean dynamics in two areas of the Sargasso Sea and describe the impact of a hurricane on the marine ecosystem. The biogeochemical model tracks 17 state variables, divided into five living functional groups: phytoplankton, zooplankton, dissolved and particulate organic matter, and finally the nutrients. We focus our attention on the evolution of nutrients and oxygen in order to understand how variations in the physical forcing can change the concentrations in both t

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4

Long, Erik Christopher. "An analysis of an eddy-resolving global ocean model in the tropical Indian Ocean." Thesis, Monterey, California : Naval Postgraduate School, 1990. http://handle.dtic.mil/100.2/ADA241009.

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Thesis (M.S. in Meterology and Physical Oceanography)--Naval Postgraduate School, September 1990.<br>Thesis Advisor(s): Semtner, Albert J. Jr. Second Reader: Batteen, Mary L. "September 1990." Description based on title screen as viewed on March 19, 2010. DTIC Descriptors: Climatology, Currents, Cycles, East (Direction), Equations, Equatorial Regions, Global, Heat Flux, Horizontal Orientation, Indian Ocean, Invariance, Mass, Mean, Models, Monsoons, Ocean Currents, Ocean Models, Resolution, Seasonal Variations, Simulation, Surface Temperature, Temperature, Tropical Regions, Velocity, West (Dire

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5

Xu, Yongfu. "A study of the biogeochemical cycle of COâ†2 in the ocean using a parcel model." Thesis, University of East Anglia, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.256896.

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6

Werner, Christian. "Compilation of a global N2O emission inventory for tropical rainforest soils using a detailed biogeochemical model." Karlsruhe : Forschungszentrum Karlsruhe, 2007. http://d-nb.info/986508675/34.

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7

Hosoe, Taro. "Stability of the global thermohaline circulation in an intermediate complexity ocean model." Thesis, University of Southampton, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.401832.

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8

Vogt, Linus. "The role of the upper ocean for global ocean heat uptake and climate." Electronic Thesis or Diss., Sorbonne université, 2024. https://theses.hal.science/tel-04951110.

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Le climat terrestre connaît actuellement des changements rapides et généralisés. Les activités humaines depuis l'ère industrielle, en particulier les émissions de CO2 dans l'atmosphère dues à la combustion de combustibles fossiles, ont intensifié l'effet de serre. Cela a entraîné une augmentation de la température moyenne de l'air à la surface du globe de 1.1°C en 2011-2020 par rapport à 1850-1900. Une autre conséquence majeure est le réchauffement des océans mondiaux, qui ont absorbé plus de 90% de l'énergie excédentaire accumulée dans le système climatique en raison de l'augmentation du forç

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9

Tokmakian, Robin Telrud. "The assimilation of satellite altimeter data into a global eddy resolving ocean model." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 1997. http://handle.dtic.mil/100.2/ADA333483.

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Dissertation (Ph.D. in Physical Oceanography)--Naval Postgraduate School, June 1997.<br>Dissertation supervisor: Semtner, Albert J. Includes bibliographical references (p. 165-168). Also Available online.

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10

Marble, Douglas Craig. "A model analysis of potential vorticity on isopycnal surfaces for the global ocean." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 1993. http://handle.dtic.mil/100.2/ADA275047.

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Thesis (M.S. in Meteorology and Physical Oceanography) Naval Postgraduate School, September 1993.<br>Thesis advisor(s): Semtner, Albert J. "September 1993." Bibliography: p. 33-35. Also available online.

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11

Felzer, Benjamin Seth, John M. Reilly, Jerry M. Melillo, et al. "Past and Future Effects of Ozone on Net Primary Production and Carbon Sequestration Using a Global Biogeochemical Model." MIT Joint Program on the Science and Policy of Global Change, 2003. http://hdl.handle.net/1721.1/4053.

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Exposure of plants to ozone inhibits photosynthesis and therefore reduces vegetation production and carbon sequestration. Simulations with the Terrestrial Ecosystem Model (TEM) for the historical period (1860-1995) show the largest damages occur in the eastern U.S., Europe, and eastern China, with reductions in Net Primary Production (NPP) of over 70% for some locations. Scenarios through the year 2100 using the MIT Integrated Global Systems Model (IGSM) show potentially greater negative effects in the future. In the worst-case scenario, the current land carbon sink in China could become a car

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12

Werner, Christian [Verfasser]. "Compilation of a global N2O emission inventory for tropical rainforest soils using a detailed biogeochemical model / Christian Werner." Karlsruhe : Forschungszentrum Karlsruhe, 2007. http://d-nb.info/986508675/34.

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13

Werner, Christian. "Compilation of a global N 2 O emission inventory for tropical rainforest soils using a detailed biogeochemical model." [S.l. : s.n.], 2007.

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14

Ricci, Giovanni. "Organic matter deposition/resuspension in a one-dimensional physical-biogeochemical model. A modelling study." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2016. http://amslaurea.unibo.it/10595/.

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The shallow water configuration of the gulf of Trieste allows the propagation of the stress due to wind and waves along the whole water column down to the bottom. When the stress overcomes a particular threshold it produces resuspension processes of the benthic detritus. The benthic sediments in the North Adriatic are rich of organic matter, transported here by many rivers. This biological active particulate, when remaining in the water, can be transported in all the Adriatic basin by the basin-wide circulation. In this work is presented a first implementation of a resuspension/deposition sub

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15

Scott, Vivian. "Assessing uncertainty in models of the ocean carbon cycle." Thesis, University of Edinburgh, 2010. http://hdl.handle.net/1842/4360.

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In this thesis I explore the effect of parameter uncertainty in ocean biogeochemical models on the calculation of carbon uptake by the ocean. The ocean currently absorbs around a quarter of the annual anthropogenic CO2 emissions to the atmosphere [Scholes et al., 2009], slowing the increase in radiative forcing associated with the increasing atmospheric CO2 concentration. Ocean biogeochemical models have been developed to study the role of the ocean ecosystem in this process. Such models consist of a greatly simplified representation of the hugely complex ocean ecosystem. This simplification r

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16

Gordon, Lawrence Joseph. "Analysis of a simulation of the seasonal cycle in the tropical Pacific Ocean in an eddy-resolving global ocean model." Thesis, Monterey, California. Naval Postgraduate School, 1992. http://hdl.handle.net/10945/23537.

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Approved for public release; distribution is unlimited<br>This paper examines the multi-level, primitive equation, global ocean circulation model of Semtner and Chervin for its ability to simulate the seasonal cycle in the tropical Pacific Ocean. The result of a 20-year integration of this model using annual mean wind forcing was reported in Semtner and Chervin (1988). This was the first global eddyresolving ocean calculation and it showed many realistic features of ocean circulation. The phase of the simulation analyzed in this report incorporates seasonally varying wind forcing from th

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17

Durgadoo, Jonathan V. "Circulation at the South-West Indian Ridge in a high-resolution global ocean model." Master's thesis, University of Cape Town, 2008. http://hdl.handle.net/11427/6469.

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Includes bibliographical references (leaves 76-86)<br>This study explores the use of the 1/4° and the 1/12° Ocean Circulation and Climate Advanced Modelling (OCCAM) project. The model's representation of the dynamic nature of this region is assessed. On average 2 - 3 intense and well-defined eddies are generated per year within the model; having mean longevities of 4.89 ± 2.20 months with average advection speeds of 5.51 ± 1.57 km day¯¹

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18

Pika, Philip. "Exploring the regional and global patterns in organic matter reactivity and its influence on benthic biogeochemical dynamics." Doctoral thesis, Universite Libre de Bruxelles, 2020. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/305204.

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Marine sediments are a key component of the global carbon cycle and climate system. They host one of the largest carbon reservoirs on Earth, provide the only long-term sink for atmospheric CO2, recycle nutrients and represent the most important climate archive. Early diagenetic pro- cesses in marine sediments are thus central to our understanding of past, present and future biogeochemical cycling and climate. Because all early diagenetic processes can be directly or indirectly linked back to the degradation of organic matter (OM), advancing this understand- ing requires disentangling the diffe

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19

Bower, Caroline A. "Prediction of tropical cyclone formation in the western North Pacific using the Navy global model." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2004. http://library.nps.navy.mil/uhtbin/hyperion/04Mar%5FBower.pdf.

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Thesis (M.S. in Meteorology)--Naval Postgraduate School, March 2004.<br>Thesis advisor(s): Patrick A. Harr, Russell L. Elsberry. Includes bibliographical references (p. 117-118). Also available online.

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20

Kim, Joong Tae. "Enhancing the resolution of sea ice in long-term global ocean general circulation model (gcm) integrations." Texas A&M University, 2003. http://hdl.handle.net/1969.1/5746.

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Open water in sea ice, such as leads and polynyas, plays a crucial role in determining the formation of deep- and bottom-water, as well as their long-term global properties and circulation. Ocean general circulation models (GCMs) designed for studies of the long-term thermohaline circulation have typically coarse resolution, making it inevitable to parameterize subgrid-scale features such as leads and convective plumes. In this study, a hierarchy of higher-resolution sea-ice models is developed to reduce uncertainties due to coarse resolution, while keeping the ocean component at coarse resolu

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21

Goddard, Paul B., Carolina O. Dufour, Jianjun Yin, Stephen M. Griffies, and Michael Winton. "CO2-Induced Ocean Warming of the Antarctic Continental Shelf in an Eddying Global Climate Model." AMER GEOPHYSICAL UNION, 2017. http://hdl.handle.net/10150/626296.

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Ocean warming near the Antarctic ice shelves has critical implications for future ice sheet mass loss and global sea level rise. A global climate model with an eddying ocean is used to quantify the mechanisms contributing to ocean warming on the Antarctic continental shelf in an idealized 2xCO(2) experiment. The results indicate that relatively large warm anomalies occur both in the upper 100 m and at depths above the shelf floor, which are controlled by different mechanisms. The near-surface ocean warming is primarily a response to enhanced onshore advective heat transport across the shelf br

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22

Stemmler, Irene. "The role of the ocean in global cycling of persistent organic contaminants refinement and application of a global multicompartment chemistry transport model." Berlin Heidelberg Springer, 2009. http://d-nb.info/996662642/04.

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23

Koeksoy, Elif [Verfasser], and Andreas [Akademischer Betreuer] Kappler. "Biogeochemical Fe-S-cycling in a late Archean and Proterozoic ocean model habitat - the high alpine Arvadi Spring / Elif Koeksoy ; Betreuer: Andreas Kappler." Tübingen : Universitätsbibliothek Tübingen, 2018. http://d-nb.info/1198973374/34.

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24

Holian, Gary Louis 1972. "Uncertainty in atmospheric CO₂ concentrations from a parametric uncertainty analysis of a global ocean carbon cycle model." Thesis, Massachusetts Institute of Technology, 1998. http://hdl.handle.net/1721.1/59087.

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Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Earth, Atmospheric, and Planetary Sciences, 1998.<br>Includes bibliographical references (leaves 90-95).<br>Key uncertainties in the global carbon cycle are reviewed and a simple model for the oceanic carbon sink is developed and described. This model for the solubility sink of excess atmospheric CO2 has many enhancements over the more simple 0-D and 1-D box-diffusion models upon which it is based, including latitudinal extension of mixed-layer inorganic carbon chemistry, climate-dependent air-sea exchange rates, and mixing of diss

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25

Levine, Richard Chaim. "Changes in shelf waters due to air-sea fluxes and their influence on the Arctic Ocean circulation as simulated in the OCCAM global ocean model." Thesis, University of Southampton, 2005. https://eprints.soton.ac.uk/25111/.

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In this study we look at the ocean circulation of the Arctic Ocean in the high-resolution OCCAM global ocean model. The Arctic Ocean consists of deep basins surrounded by a large area of continental shelves, where cooling and ice formation play an important role in dense water formation. In the model these dense waters are transported by a circumpolar boundary current into the deep convection sites of the North Atlantic Ocean. The boundary current is thought to be a continuous feature in the real ocean, however the driving force is still unknown. We provide evidence that buoyancy fluxes that o

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26

Volta, Chiara. "Carbon cycling at the estuarine interface: a new model for regional and global scale assessment." Doctoral thesis, Universite Libre de Bruxelles, 2016. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/228693.

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The overarching goal of this thesis is to develop a diagnostic and predictive model to quantify the estuarine CO2 dynamics across scales – from catchment to the globe – using an approach that explicitly resolves the strong physical and biogeochemical gradients typically observed in these systems.Chapter 1 provides fundamental definitions and descriptions of estuaries, as well as an assessment of their role in the global carbon cycle. It also raises the specific objectives and research questions tackled in the present study. Chapter 2 presents the rationale behind the novel modelling approach (

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27

Maoyi, Molulaqhooa Linda. "Simulating the characteristics of tropical cyclones over the South West Indian Ocean using an adaptive Stretched-Grid Global Climate Model." Master's thesis, University of Cape Town, 2015. http://hdl.handle.net/11427/19989.

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Tropical Cyclones are one of the most devastating natural phenomena. Previous attempts to simulate Tropical Cyclones (TCs) over the South West Indian Ocean (SWIO) have used Global Circulation Models (GCMs) with uniform grid. This study examines the capability of a GCM with adaptive grid stretching (CAM-EULAG, hereafter CEU) in simulating the characteristics of TCs over the SWIO. In the study, the CEU model is applied with a fine horizontal grid resolution (0.5°x0.5°) over the SWIO and coarser resolution (1°x1° - 2°x2.25°) over the rest of the globe. The model simulation is performed for 11 yea

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28

Izumi, Ryusuke. "Assessing the "ballast" hypothesis for carbon transport in the ocean : global sediment trap data analysis and simulation in an Earth System Model." Thesis, University of British Columbia, 2010. http://hdl.handle.net/2429/29650.

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Sediment trap particle flux data analysis and development of a model representation of mineral “ballast” mechanism for carbon transport in the ocean is presented in this study. The validity of several classical POC remineralization models as well as recently hypothesized “ballast” mechanism based POC remineralization models were tested by analyzing data from selected 79 sediment traps at >1500 m from around the world. POC flux modelled with different variations of model representations at each sediment trap site was statistically compared with corresponding measured POC flux in order to evalua

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Yin, Jianjun, Jonathan Overpeck, Cheryl Peyser, and Ronald Stouffer. "Big Jump of Record Warm Global Mean Surface Temperature in 2014-2016 Related to Unusually Large Oceanic Heat Releases." AMER GEOPHYSICAL UNION, 2018. http://hdl.handle.net/10150/627121.

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A 0.24 degrees C jump of record warm global mean surface temperature (GMST) over the past three consecutive record-breaking years (2014-2016) was highly unusual and largely a consequence of an El Nino that released unusually large amounts of ocean heat from the subsurface layer of the northwestern tropical Pacific. This heat had built up since the 1990s mainly due to greenhouse-gas (GHG) forcing and possible remote oceanic effects. Model simulations and projections suggest that the fundamental cause, and robust predictor of large record-breaking events of GMST in the 21st century, is GHG forci

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Tang, Chao. "Model estimations of possible climate changes of surface solar radiation at regional scales over Southern Africa and the South West Indian Ocean." Thesis, La Réunion, 2017. http://www.theses.fr/2017LARE0055/document.

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Les variations du rayonnement solaire en surface (SSR) peuvent avoir un impact significatif sur divers aspects du système climatique, et notamment sur le développement socio-économique d’un pays. Pour identifier les impacts possibles du changement climatique sur le rayonnement solaire en surface à l'échelle régionale (~ 50 km) en Afrique australe jusqu'à la fin du 21ème siècle, on a analysé les données mensuelles produites dans le cadre du projet CORDEX-Afrique sur la période 1979-2099. Ces données sont issues des sorties de 5 modèles régionaux de climat (RCM) forcés par 10 modèles globaux de

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31

Danek, Christopher [Verfasser], Gerrit [Akademischer Betreuer] Lohmann, Gerrit [Gutachter] Lohmann, and Sergey [Gutachter] Danilov. "Modeling the North Atlantic and Labrador Sea dynamics with the global high-resolution ocean model FESOM / Christopher Danek ; Gutachter: Gerrit Lohmann, Sergey Danilov ; Betreuer: Gerrit Lohmann." Bremen : Staats- und Universitätsbibliothek Bremen, 2019. http://d-nb.info/1202334121/34.

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Werner, Christian Verfasser], and Klaus [Akademischer Betreuer] [Butterbach-Bahl. "Compilation of a global N₂O emission inventory for tropical rainforest soils using a detailed biogeochemical model = Erstellung eines globalen Katasters für N₂O-Emissionen aus Böden tropischer Regenwälder unter Verwendung eines biogeochemischen Modells." Freiburg : Universität, 2007. http://d-nb.info/1114887250/34.

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Itoh, Yuji. "Crustal Deformation Model of the Southern Kurile Subduction Zone Inferred from Geodetic Observation Data." Kyoto University, 2020. http://hdl.handle.net/2433/253092.

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Sathyanarayanan, Anju [Verfasser]. "Understanding projected salinity changes in the global ocean of the MPI-Earth system model under a global warming scenario : Verständnis der projizierten Salzgehaltsänderungen im globalen Ozean des MPI-Erde-Systemmodells unter einem Szenario der globalen Erwärmung / Anju Sathyanarayanan." Hamburg : Staats- und Universitätsbibliothek Hamburg Carl von Ossietzky, 2020. http://d-nb.info/1221276417/34.

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35

Völpel, Rike [Verfasser], André [Akademischer Betreuer] Paul, Michael [Gutachter] Schulz, and Heiko [Gutachter] Pälike. "Benthic foraminiferal oxygen isotopes during the Last Glacial Maximum and last deglaciation : Paleoceanographic inferences from an isotope-enabled global ocean model / Rike Völpel ; Gutachter: Michael Schulz, Heiko Pälike ; Betreuer: André Paul." Bremen : Staats- und Universitätsbibliothek Bremen, 2018. http://d-nb.info/1171420412/34.

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Wang, Xuezhu [Verfasser], Thomas [Akademischer Betreuer] [Gutachter] Jung, and Torsten [Gutachter] Kanzow. "Evaluation and application of Finite Element Sea Ice-Ocean Model (FESOM) for the Arctic-North Atlantic region in variable resolution global simulations / Xuezhu Wang. Betreuer: Thomas Jung. Gutachter: Thomas Jung ; Torsten Kanzow." Bremen : Staats- und Universitätsbibliothek Bremen, 2016. http://d-nb.info/1106374517/34.

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Scholz, Patrick [Verfasser], Gerrit [Akademischer Betreuer] Lohmann, and Monika [Akademischer Betreuer] Rhein. "A global Finite-Element Sea-Ice ocean model focussed on deep water formation areas: Variability of North Atlantic deep water formation and interannual to decadal climate modes / Patrick Scholz. Gutachter: Gerrit Lohmann ; Monika Rhein. Betreuer: Gerrit Lohmann." Bremen : Staats- und Universitätsbibliothek Bremen, 2012. http://d-nb.info/1072045907/34.

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Yu, Haishan. "Essays on Environmental and Energy Economics." Doctoral thesis, Uppsala universitet, Nationalekonomiska institutionen, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-222837.

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Essay I: In January, 2005, the EU launched the first international emissions trading system (EU ETS), aimed at reducing carbon emissions in a cost-effective way by means of a market-based instrument. In this paper, we use the treatment/control, before/after design of the natural experiment approach to investigate the treatment effect of the EU ETS on the profitability of a sample of Swedish energy firms in 2005 and 2006. We also investigate whether under-cap and over-cap firms respond differently to the EU ETS. The estimation results in general suggest no significant impact in 2005 and a negat

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39

Kehoe, Ryan M. "Characteristic errors in 120-H tropical cyclone track forecasts in the western North Pacific." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2005. http://handle.dtic.mil/100.2/ADA432822.

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Cosme, Emmanuel. "Cycle du soufre des moyennes et hautes latitudes Sud dans un modèle de circulation générale atmosphérique." Phd thesis, Université Joseph Fourier (Grenoble), 2002. http://tel.archives-ouvertes.fr/tel-00705168.

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L'objectif de ce travail est de contribuer à la compréhension du cycle atmosphérique du soufre en Antarctique par l'utilisation d'un Modèle de Circulation Générale Atmosphérique (MCGA). Les versions "Antarctique" et "soufre" du MCGA LMD-ZT ("Laboratoire de Météorologie Dynamique- Zoom Traceurs") ont été fusionnées pour l'étude à haute résolution Antarctique du cycle du soufre dans les moyennes et hautes latitudes Sud. Une méthode de forçage "latéral" de la circulation atmosphérique antarctique par des analyses du Centre Européen de Prévision Météorologique à Moyen Terme (CEPMMT) a été spécifiq

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Chou, Suming, and 周淑敏. "The Forecast Model of Ocean Freight in Global Logistics." Thesis, 2003. http://ndltd.ncl.edu.tw/handle/92752731262571399696.

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碩士<br>國立臺北科技大學<br>商業自動化與管理研究所<br>91<br>The ocean freight rates are dropping every year through gradual change and development of rate structure. The shipping carriers are forced to enhance valued added quality of transportation and diversity of services due to fierce competition and other unfavorable conditions. However, ocean freight rate is the primary income with a lot of emphasis on shipping business. The carriers have reached a consensus on the elimination of competition in recent meeting. They are compressing spaces in Taiwan, which leads to an acute shortage of equipments, in order to g

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Catchpole, A.-M. "Variability and climate change signals in the Southern Ocean in the CSIRO and Antarctic CRC coupled ocean-atmosphere model." Thesis, 2007. https://eprints.utas.edu.au/19240/1/whole_CatchpoleAnn-Maree2007_thesis.pdf.

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To investigate the variability and potential climate change impacts in the Southern Ocean I use output from the c10, c15 and c16 model runs of the CSIRO and Antarctic CRC coupled ocean-atmosphere model. 300 years of the output is reported here, after a spin up of approximately 1000 years. Modifications over the earlier versions of this model (c10 and c15), including improved topography in waters south of Australia make the c16 model run more suitable for examining natural variability in the southern ocean. We use potential temperature, salinity and velocity (21 depths, 66 longitudes and 29 lat

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Lagman, Karl Bryan. "Application of frequency-dependent nudging in biogeochemical modeling and assessment of marine animal tag data for ocean observations." 2013. http://hdl.handle.net/10222/28453.

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Numerical models are powerful and widely used tools for environmental prediction; however, any model prediction contains errors due to imperfect model parameterizations, insufficient model resolution, numerical errors, imperfect initial and boundary conditions etc. A variety of approaches is applied to quantify, correct and minimize these errors including skill assessments, bias correction and formal data assimilation. All of these require observations and benefit from comprehensive data sets. In this thesis, two aspects related to the quantification and correction of errors in biological ocea

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Spence, John Paul Gordon. "Coarse versus eddy-permitting global ocean simulations : experiments with the UVic earth system climate model." Thesis, 2009. http://hdl.handle.net/1828/2585.

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This dissertation presents experiments with the UVic Earth System Climate Model that explore the sensitivity of global climate simulations to an increase of horizontal resolution into the ocean eddy-permitting range. Model versions, with resolutions ranging from 1.8' (latitude) x3.6' (longitude) to 0.2'x0,4'. are evaluated in control states and in response to climate perturbations. The effect of resolution on ocean volume transport, ocean heat transport, water mass formation, and sea ice distribu¬tion are investigated within the framework of three foci: 1) the Atlantic meridional overturning c

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"Climate Variability and Trend on Interannual-to-Centennial timescales from Global Observations and Atmosphere-Ocean Model Simulations." Doctoral diss., 2013. http://hdl.handle.net/2286/R.I.17718.

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abstract: The numerical climate models have provided scientists, policy makers and the general public, crucial information for climate projections since mid-20th century. An international effort to compare and validate the simulations of all major climate models is organized by the Coupled Model Intercomparison Project (CMIP), which has gone through several phases since 1995 with CMIP5 being the state of the art. In parallel, an organized effort to consolidate all observational data in the past century culminates in the creation of several "reanalysis" datasets that are considered the closest

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Sharif, Jahfer. "Impact of river runoff into the ocean on climate in a coupled model." Thesis, 2019. https://etd.iisc.ac.in/handle/2005/4378.

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In order to study the impact of global runoff, sensitivity experiment (NoRiv) was carried out by shutting down the entire runoff into the ocean for a period of 200 years. The changes in NoRiv, compared to the reference simulation (CR), shows the impact of global runoff (NoRiv minus CR). The evolution of mean ocean SSS in the major ocean basins show that the upper– ocean reached a quasi-stabilized stage in the first 100 years in the NoRiv. Globally, when there is no runoff, the surface ocean turns saltier with the largest increase occurring off the mouths of major river systems. High sali

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Sharif, Jahfer. "Influence of River Discharge on Climate in A Coupled Model." Thesis, 2013. http://etd.iisc.ac.in/handle/2005/3342.

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River discharge can affect ocean surface temperature by altering stratification within the oceanic mixed layer. A hitherto unexplored aspect of present climate is the feedback of river runoff onto climate. This thesis presents an investigation of the impact of global river runoff on oceans and climate using a fully coupled global climate model, Community Climate System Model (CCSM). Two model simulations for a period of 100 years have been carried out: 1) a reference run (CTRL) that incorporates all the features of a global coupled model with river runoff into the ocean embedded in it, and 2)

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Sharif, Jahfer. "Influence of River Discharge on Climate in A Coupled Model." Thesis, 2013. http://etd.iisc.ernet.in/2005/3342.

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River discharge can affect ocean surface temperature by altering stratification within the oceanic mixed layer. A hitherto unexplored aspect of present climate is the feedback of river runoff onto climate. This thesis presents an investigation of the impact of global river runoff on oceans and climate using a fully coupled global climate model, Community Climate System Model (CCSM). Two model simulations for a period of 100 years have been carried out: 1) a reference run (CTRL) that incorporates all the features of a global coupled model with river runoff into the ocean embedded in it, and 2)

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Carto, Shannon Leigh. "Climate model study of the role of global climate in the late Pleistocene migration of anatomically modern humans out of Africa." Thesis, 2006. http://hdl.handle.net/1828/2114.

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According to the "Out-of-Africa 2" theory of human evolution all living humans today descend from a group of Anatomically Modern Homo sapiens or Anatomically Modem Humans that evolved in Africa 200,000 years ago and subsequently migrated out of Africa and spread into the rest of the World around 100,000 years. As a result an interest has developed in establishing a concrete theory of the factors that compelled and/or motivated our ancestors to venture out of their African origins at this time. Interestingly, the Earth's Last Glacial Cycle also dates from this period--stretching from 115,000 to

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(8771531), Licheng Liu. "Quantifying Global Exchanges of Methane and Carbon Monoxide Between Terrestrial Ecosystems and The Atmosphere Using Process-based Biogeochemistry Models." Thesis, 2020.

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<p>Methane (CH<sub>4</sub>) is the second most powerful greenhouse gas (GHG) behind carbon dioxide (CO<sub>2</sub>), and is able to trap a large amount of long-wave radiation, leading to surface warming. Carbon monoxide (CO) plays an important role in controlling the oxidizing capacity of the atmosphere by reacting with OH radicals that affect atmospheric CH<sub>4</sub> dynamics. Terrestrial ecosystems play an important role in determining the amount of these gases into the atmosphere. However, global quantifications of CH<sub>4</sub> emissions from wetlands and its sinks from uplands, and CO

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