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 62 for “"tropical Pacific"”.
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The cobalt cycle in the Tropical Pacific Ocean
… Analysis of over 1000 samples collected in the Tropical Pacific Ocean reveals a dissolved cobalt distribution that is strongly coupled to dissolved oxygen, with peak concentrations where oxygen is lowest. Large cobalt plumes within anoxic waters are maintained by three processes: 1) a cobalt …
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Reconstructing Tropical Pacific Climate Variability from Coral Archives
The tropical Pacific Ocean is a critical component of the climate system, and its mean state and variability are linked to effects across the globe. Our understanding of the area is limited by the scarcity of direct observations of important climatic variables prior to the mid-twentieth century, …
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The cobalt cycle in the tropical Pacific Ocean
… Analysis of over 1000 samples collected in the Tropical Pacific Ocean reveals a dissolved cobalt distribution that is strongly coupled to dissolved oxygen, with peak concentrations where oxygen is lowest. Large cobalt plumes within anoxic waters are maintained by three processes: 1) a cobalt …
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Natural variability in eastern tropical Pacific nitrous oxide emissions
… the oxygen minimum zones (OMZs) in the eastern tropical Pacific and Arabian Sea that are not accounted for in assessments. Measurements of atmospheric concentrations from a selection of AGAGE stations around the Pacific Ocean were combined with back-trajectories calculated using the HYSPLIT4 …
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An estimate of the upwelling rate in the tropical Pacific Ocean
An inverse box model of the tropical Pacific Ocean from 321S - 10N is constructed from two zonal and six meridional hydrographic sections. This data is supplemented with LADCP data close to the equator where geostrophy fails. A consistent solution is found despite the presence of a number of …
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Eastern Tropical Pacific Climate And El Niño Variability During The Past Millennium
… from the dynamically vital eastern equatorial Pacific Ocean (EEP) spanning the past millennium are sparse. This has limited our understanding of tropical Pacific dynamics, leaving questions regarding the source of ENSO variability unanswered. Here I seek to address some of these questions …
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Understanding the role of stochastic atmospheric forcing in tropical Pacific decadal variability and ENSO modulation
Interdecadal variability of the tropical Pacific affects global hydroclimate and ecosystem and is suggested to modulate global mean temperature in the past century. It has been long acknowledged that Pacific decadal variability can be generated in the extratropics through integration of stochastic …
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The Evolution of the El Niño-Southern Oscillation and Tropical Pacific Climate Across the Last Deglaciation
… of the ENSO system and its relationship to tropical Pacific climate dynamics remains unclear. Although new paleoceanographic proxies have shown promise in in their ability to constrain past ENSO change, little is known about how ENSO varied in response to millennial-scale climate events over …
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Exploring last millennium tropical Pacific hydrology: Insights from climate models, proxy data, and proxy system modeling
Author requested closed access (OA after 2yrs) in Vireo ETD system
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Air-sea interaction at contrasting sites in the eastern tropical Pacific : mesoscale variability and atmospheric convection at 10°N
… at two contrasting sites on 125°W in the eastern tropical Pacific Ocean using data from the Pan American Climate Study (PACS) field program. Analysis based on the PACS data set and satellite observations of sea surface temperature (SST) reveals marked differences in the role of ocean dynamics in …
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Analysis of Net Primary Production Models and Observations in the Tropical Pacific Ocean and Their Relationship with Fisheries Yield
… primary production and fisheries yields in the tropical Pacific Ocean, and how uncertainties in physiology parameterizations and in field primary production measurements used in the models’ formulations limit model skill. I find that primary production model choice has an effect on designating …
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Air-sea interaction at contrasting sites in the Eastern Tropical Pacific : mesoscale variability and atmospheric convection at 10°N
… at two contrasting sites on 125°W in the eastern tropical Pacific Ocean using data from the Pan American Climate Study (PACS) field program. Analysis based on the PACS data set and satellite observations of sea surface temperature (SST) reveals marked differences in the role of ocean dynamics in …
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Constraining Respired Carbon Storage in the Eastern Tropical Pacific Over the Last 25 Thousand Years Using Benthic Foraminiferal Boron/Calcium Ratios
<p>The storage of inorganic carbon in the deep Pacific Ocean is thought to play an important role in regulating both glacial-interglacial and millennial-scale atmospheric CO<sub>2</sub> concentrations (Broecker and Barker 2007; Sigman et al., 2010). A recent study by Loveley et al. (2017) showed …
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Archives of climate variability on Kiritimati: lacustrine, aeolian and remote sensing perspectives
Sedimentary archives from tropical Pacific islands, together with records of modern hydrological processes, can provide information on past changes in tropical hydroclimate and test island landscape sensitivity to changes in the hydrologic cycle. For small tropical islands in particular, insight …
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Observational Studies of Wave Disturbances in the Tropical Pacific and Their Relationship With Deep Cloud Activity (Global Atmospheric Research Program(garp), Fgge, Gate, Itcz, Spcz, Sst)
… is focused on the situations in the eastern Pacific for the following reasons: (a) this is the area where strong deep convection frequently develops in the northern summer, (b) it is also an area which has been least explored meteorologically.
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A Model Analysis of Anthropogenic Influences on Ozone and Related Species: The Interaction of Transport and Chemistry
… trace gases were observed in the southern tropical Pacific during the PEM-TROPICS-A (PT-A) and PEM-TROPICS-B (PT-B) campaigns. In the second part of this thesis, a 3D CTM, MOZART, is used to investigate the ozone budget and identify its controlling factors over this region. The model …
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Amundsen Sea sea-ice variability, atmospheric circulation, and spatial variations in snow isotopic composition from new West Antarctic firn cores
… era. I next investigate the remote influence of tropical Pacific variability on marine aerosol transport to West Antarctica. Results illustrate that both source and transport of marine aerosols to West Antarctica are controlled by remote atmospheric forcing, linking local dynamics (e.g., …
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Amundsen Sea sea-ice variability, atmospheric circulation, and spatial variations in snow isotopic composition from new West Antarctic firn cores
… era. I next investigate the remote influence of tropical Pacific variability on marine aerosol transport to West Antarctica. Results illustrate that both source and transport of marine aerosols to West Antarctica are controlled by remote atmospheric forcing, linking local dynamics (e.g., …
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The role of ocean dynamics within tropical Atlantic climate variability
Capitalising on the vast knowledge gained in the tropical Pacific, tropical Atlantic variability is viewed from an energetics perspective and contrasted against the Pacific at both seasonal and inter-annual timescales. The character of remotely forced thermocline depth variability is evaluated …
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An investigation into the causes for the reduction in the variability of the El Niño-Southern Oscillation in the early Holocene in a global climate model
… the variability on interannual timescales in the tropical Pacific was much reduced in comparison to today. We investigate a possible cause for this using output from a Global Climate Model forced by present day and early Holocene boundary conditions, and a simplified model that is known to …
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