Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 42 for “"Earth system model"”.
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Application of the hector-brick reduced complexity earth system model for probabilistic climate projection
… uncertainties. Reduced complexity climate models can be useful tools for quantifying uncertainty, given their flexibility, computational efficiency, and the ability to link these models with large-ensemble frameworks. Here, we develop and use the Hector-BRICK reduced complexity climate …
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Investigating tropical cyclone-climate interactions using the high-resolution Community Earth System Model (CESM)
Made available in DSpace on 2018-09-04T20:47:23Z (GMT). No. of bitstreams: 3 LI-DISSERTATION-2018.pdf: 17879372 bytes, checksum: e4ed4e5d3e31d6edb0f75746ea54021a (MD5) LICENSE.txt: 4203 bytes, checksum: 2747f14671ae1e47b4dfe239d9040807 (MD5) PROQUEST_LICENSE.txt: 4549 bytes, checksum: …
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The importance of ocean internal variability for coupled climate modeling in the community earth system model
… use tools such as global coupled climate model ensembles to attempt to quantify these uncertainties. Quantifying different types of uncertainties involved in modeling the Earth’s climate system is of high importance as processes within the climate system are chaotic and challenging to …
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What to plant and where to plant it; Modeling the biophysical effects of North America temperate forests on climate using the Community Earth System Model
… heat flux. In this study we used the Community Earth System Model to assess the biophysical effect of North American temperate forests on climate and how this effect changes with location, tree type, and forest management. We calculated the change in annual temperature and energy balance …
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Modeled sensitivity of the northwestern Pacific upper-ocean responses to tropical cyclones in a fully coupled climate model with varying ocean grid resolution
Tropical cyclones (TCs) actively contribute to Earth's climate, but TC-climate interactions are largely unexplored in fully-coupled models. Here we analyze the upper-ocean response to TCs using a high resolution Earth system model, in which a 0.5° atmosphere is coupled to an ocean with two …
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Evaluating the interactions of crop management, carbon cycling, and climate using Earth system modeling and remote sensing
… Inclusion of crop management practices in Earth system models used for assessing global climate is a key requirement for evaluating the overall effects of different crop management practices on C cycling and their potential to mitigate climate change. Studies in this dissertation seek to …
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Analyzing the effects of unforced natural variability and anthropogenic forcing on ENSO variability using CESM
… (ENSO) is an important contributor to Earth’s inter-annual climate variability, with worldwide weather effects (Whetton and Rutherfurd, 1994; Hoerling and Zhong, 1997; Dai and Wigley, 2000). Understanding how ENSO may change with climate is a major challenge, given the internal …
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Investigating the atmospheric and oceanic drivers of Atlantic Multidecadal Variability and predictability
Despite its numerous impacts across the Earth system, the relative importance of ocean and atmospheric dynamics in generating Atlantic Multidecadal Variability (AMV) remains an open question. This thesis presents three pathways to understanding how oceanic and atmospheric processes generate key …
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Investigating the Atmospheric and Oceanic Drivers of Atlantic Multidecadal Variability and Predictability
Despite its numerous impacts across the Earth system, the relative importance of ocean and atmospheric dynamics in generating Atlantic Multidecadal Variability (AMV) remains an open question. This thesis presents three pathways to understanding how oceanic and atmospheric processes generate key …
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The Tambora project: an atmospheric simulation and historical evaluation of the Mount Tambora eruption and its impacts on global climate and society (1815-18)
… communities to rapid changes in the climate system, a multidisciplinary collaboration between atmospheric science, computer modeling and humanistic analysis was developed in order to fully reconstruct this epochal global event. This project reviews the existing scientific and journalistic …
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Fingerprints and Drivers of Recent Changes in Oceanic Oxygen: From Regional to Global Scales
Observations and Earth System Model (ESM) projections indicate that a reduction in the oxygen inventory of the global ocean, termed ocean deoxygenation, is a likely consequence of on-going anthropogenic warming. The contribution of external forcing factors to observed changes in dissolved oxygen …
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The tropical peatland carbon sink: climatic drivers and modelling of peat accumulation at the pan-tropical scale
Tropical peatlands are carbon-dense ecosystems and act as a globally important carbon sink. However, uncertainties exist about the climatic and environmental drivers of carbon accumulation and about the future of the carbon sink with climate change. There are also relatively few modelling studies …
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Internal and structural variability in global urban climate projections in CMIP6
… that are specific to built landscapes. A robust modeling framework to address uncertainty in local- or regional-scale climate change should include the roles of internal variability, model parametric and structural uncertainty, and scenario uncertainty. Quantitative attributions of the structure …
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Quantifying future volcanic impacts on climate projections and their uncertainties using stochastic volcanic emissions
… forming sulfate aerosols that alter Earth’s radiative balance leading to abrupt climatic changes. Despite the importance of volcanic stratospheric aerosols for climate, current climate projection studies rely on two simplified assumptions: (i) that future volcanic forcing is …
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Investigating Tropospheric Hydrogen Peroxide Trends from 1950-2014
… the history of tropospheric oxidants relies on modeling studies. We quantify the global H₂O₂ burden and trends between 1950 and 2014 from the Community Earth System Model - Whole Atmosphere Community Climate Model version 6 (CESM2-WACCM6). This is a global chemistry-climate model, with each of …
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Climate impact of aviation NOx̳ emissions : radiative forcing, temperature, and temporal heterogeneity
… ensemble simulations are conducted with an earth system model of intermediate complexity. Inter-scenario comparisons between emissions starting in 1991, 2016 and 2036 with mid-range and high anthropogenic emissions are performed. We then determine the existence of long-term temporal …
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Spatio-Temporal Dynamics Of Phytoplankton Biomass From Ocean Color Remote Sensing And Cmip5 Model Suites
… in ecological modules incorporated in climate models. While climate models are projecting relatively clear trends in ocean ecology over the next century, distinguishing between interannual variability and ocean biology trends from satellite observations is difficult. Short record length, …
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Quantifying the Biogeochemical Impact of Land Plant Expansion in the Mid Devonian and Implications in Marine Anoxic Events
The evolution of land plant root systems occurred stepwise throughout the Devonian, with the first evidence of complex root systems appearing in the mid-Givetian. This biological innovation provided an enhanced pathway for the transfer of terrestrial phosphorus (P) to the marine system via …
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Simulating the Effects of Hydroclimate Stress on BVOC-Chemistry-Climate Interactions in NASA GISS ModelE
… of isoprene drought stress into the Model of Emissions and Gases and Aerosols from Nature (MEGAN) module in the NASA GISS ModelE, an earth system model, is described along with validation of isoprene emissions during the 2012 drought at the Missouri Ozarks Ameriflux site. In the third …
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