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Dissertations / Theses on the topic 'Atmospheric reanalyses'

Author: Grafiati

Published: 25 May 2024

Last updated: 31 July 2025

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1

Huynh, Jonathan. "Heat Stress in a Climate Setting| A Framework for Reanalyses." Thesis, University of California, Davis, 2017. http://pqdtopen.proquest.com/#viewpdf?dispub=10619617.

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<p> The proliferation of reanalysis models for the atmosphere in recent decades has allowed researchers to study Earth’s past climate in great detail. While much work has gone into understanding key climate indicators such as surface temperature and precipitation trends, there have been few studies dealing with heat stress. As climate change grows increasingly exigent, it is becoming vitally important to understand the thermal impacts on biological systems. </p><p> This study analyzed data from five reanalysis models (20CRv2, NARR, NNRA 1, NCEP DOE 2, and ERA-I) and found agreement in

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2

Stuckman, Scott Seele. "Global Three-Dimensional Atmospheric Structure of the Atlantic Multidecadal Oscillation as Revealed by Two Reanalyses." The Ohio State University, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=osu1476105315092858.

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3

Connolly, Charlotte J. "Causes of Southern Hemisphere climate variability in the early 20th century." Ohio University Honors Tutorial College / OhioLINK, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=ouhonors1587217042363834.

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4

Lytle, William. "Coupled Evaluation of Below- and Above-Ground Energy and Water Cycle Variables from Reanalysis Products Over Five Flux Tower Sites in the U.S." Thesis, The University of Arizona, 2015. http://hdl.handle.net/10150/595636.

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Reanalysis products are widely used to study the land-atmosphere exchanges of energy, water, and carbon fluxes, and have been evaluated using in situ data above or below ground. Here measurements for several years at five flux tower sites in the U.S. (with a total of 315,576 hours of data) are used for the coupled evaluation of both below- and above-ground processes from three global reanalysis products and six global land data assimilation products. All products show systematic errors in precipitation, snow depth, and the timing of the melting and onset of snow. Despite the biases in soil mo

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5

Weese, Scott R. "A reanalysis of hurricane Hazel (1954) /." Thesis, McGill University, 2003. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=80894.

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Hurricane Hazel struck North America on 15-16 October 1954, leaving a pattern of heavy rainfall and flooding in its wake. A complete analysis of the synoptic-scale conditions associated with the transformation of Hazel from its tropical phase into an extratropical cyclone was first undertaken to discern the dynamic and thermodynamic elements crucial to the intensification of this storm.<br>An analogue search was then conducted for Hazel using linear correlations of anomaly sea level pressure and 1000-500 hPa thickness. Three cases were found in 1985, 1995 and 1999. A comparison of these an

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6

Moraes, Ayrton Zadra. "Empirical normal mode diagnosis of reanalysis data and dynamical-core experiments." Thesis, McGill University, 2000. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=37785.

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Global data and numerical models are used to investigate the climatology and variability in the upper-troposphere and lower-stratosphere where large-scale low-frequency vorticity modes dominate over high-frequency inertia-gravity waves. An algorithm based on the Empirical Normal Mode decomposition technique is proposed as a diagnostic tool. This technique combines dynamics (a wave-activity of linear dynamics defines the orthogonality between modes) with statistics (the wave-activity amplitude of each mode provides a measure of its statistical significance) and has the unbiased ability to captu

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7

Wilson, Aaron Benjamin. "Enhancement of Polar WRF atmospheric and surface processes: An annual simulation." The Ohio State University, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=osu1268066611.

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8

Tastula, Esa-Matti. "Insights into the Challenges of Modeling the Atmospheric Boundary Layer." Scholar Commons, 2015. http://scholarcommons.usf.edu/etd/5782.

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This work approaches the topic of modeling the atmospheric boundary layer in four research projects, which are summarized below. i) The diurnal cycles of near-surface meteorological parameters over Antarctic sea ice in six widely used atmospheric reanalyses were validated against observations from Ice Station Weddell. The station drifted from February through May 1992 and provided the most extensive set of meteorological observations ever collected in the Antarctic sea ice zone. For the radiative and turbulent surface fluxes, both the amplitude and shape of the diurnal cycles varied considerab

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9

Quarello, Annarosa. "Développement de nouvelles méthodes d’homogénéisation des données atmosphériques GNSS. Application à l’étude de la variabilité climatique." Electronic Thesis or Diss., Sorbonne université, 2020. http://www.theses.fr/2020SORUS457.

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L'homogénéisation est une étape importante et cruciale pour améliorer l'utilisation des données d'observation pour l'analyse du climat. Ce travail est motivé par l'analyse de les données journalières de Contenu Intégré en Vapeur d’Eau (CIVE) mesurées par GNSS (Global Navigation Satellite Systems), appelées GNSS CIVE (IWV Integrated Water Vapor en anglais) qui n'ont pas encore été utilisées dans ce contexte. Ces séries sont affectées par des inhomogénéités liées à des changements dans l'instrumentation, dans l'environnement et dans la procédure de traitement des données. En raison de la variabi

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10

Friedman, Karen S. (Karen Samard). "Global atmospheric water vapor flux climatology in the NCEP/NCAR reanalysis and the Oort data set." Thesis, Massachusetts Institute of Technology, 1997. http://hdl.handle.net/1721.1/10371.

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11

Moser, David K. "Juxtaposition at 45 km of Temperatures from Rayleigh-Scatter Lidar and Reanalysis Models." DigitalCommons@USU, 2019. https://digitalcommons.usu.edu/etd/7434.

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Weather and climate forecasts are almost exclusively produced by computer models, which use atmospheric measurements as starting points. It is a well-known and joked-about fact that model predictions can be incorrect at times. One of the reasons this happens is due to gaps in our knowledge of atmospheric conditions in areas where measurements don’t often taken place, such as the mesosphere, which stretches from roughly 45-90 km altitude. A lidar is a device that can shoot out short bursts of laser light to measure things such as atmospheric thickness at a distance. From this information one ca

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12

Stovern, Diana Rose. "The Environments And Associated Physical Mechanisms That Cause Size And Structure Changes In A Tropical Cyclone." Diss., The University of Arizona, 2014. http://hdl.handle.net/10150/338896.

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Tropical cyclones (TCs) can make significant size changes during their lifetime. Being able to accurately forecast TC size change is important for predicting the onset of storm surge as well as the spatial extent of damaging winds. TC size changes can occur from internal storm dynamics, such as eyewall replacement cycle or from changes in the synoptic environment. In this study, the impacts of changing the atmospheric temperature and air-sea temperature difference on TC size and structure are investigated. The study is conducted in two parts: the first part uses the WRF-ARW model to test the s

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13

Nicolas, Julien Pierre. "Atmospheric Change in Antarctica since the 1957-1958 International Geophysical Year." The Ohio State University, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=osu1397747086.

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14

von, Kraemer Adam. "Temporal Consistency of the UERRA Regional Reanalysis: Investigating the Forecast Skill." Thesis, Uppsala universitet, Luft-, vatten och landskapslära, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-342027.

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Weather forecasting has improved greatly since the middle of the 20th century, thanks to better forecasting models, an evolved weather observing system, and improved ways of assimilating the observation data. However, these large systematical improvements make it difficult to use the weather data for climatological studies. Furthermore, observations are scarce, and they cannot be made everywhere. One way to solve this problem is to produce reanalyses, where a fixed version of a numerical weather prediction (NWP) model is used to produce gridded analysis and forecast data with detailed descript

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15

Isioye, Olalekan Adekunle. "An Investigation of Ground-Based GNSS Atmospheric Remote Sensing Techniques for Weather and Climate Monitoring in Nigeria." Thesis, University of Pretoria, 2017. http://hdl.handle.net/2263/60814.

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Radio signals from Global Navigation Satellite Systems (GNSS) satellites suffer delay as they propagate through the atmosphere (neutral and non-neutral) and this delay is partially driven by the water vapour content in the atmosphere. The delay component due to the non-neutral atmosphere (ionosphere) is removed through the use of dual frequency GNSS receivers. The main tropospheric parameter is the zenith tropospheric (or total) delay (ZTD), which is a widely accepted parameter with which to express the total delay in the signal from all satellites due to the neutral atmosphere. The ZTD

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16

Chellini, Giovanni. "Assessment of the capability of the Infrared Atmospheric Sounding Interferometer (IASI), the Atmospheric Infrared Sounder (AIRS), and the ERA5 reanalysis to detect specific humidity inversions at an Arctic site." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2020.

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Specific humidity inversions are extremely frequent in the Arctic atmosphere, and they are strongly intertwined with the energy budget, by affecting downward longwave radiation and cloud processes. Despite their importance, they have been the focus of a limited number of studies, and our knowledge of their characteristics is limited because of the lack of in situ data in the region, and the presence of large errors in moisture variables in reanalyses. Retrievals from satellite infrared sounders could fill this knowledge gap. In this thesis, the capability of two benchmark satellite sounders, t

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17

Wood, Kimberly. "Evaluating the Impacts of Eastern North Pacific Tropical Cyclones on North America Utilizing Remotely Sensed and Reanalysis Data." Diss., The University of Arizona, 2012. http://hdl.handle.net/10150/238676.

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The eastern North Pacific Ocean has the highest density of tropical cyclone genesis events of any tropical basin in the world, and many of these systems form near land before moving westward. However, despite the level of tropical cyclone activity in this basin, and the proximity of the main genesis region to land, tropical cyclone behavior in the eastern North Pacific has been relatively unexplored. When synoptic conditions are favorable, moisture from northward-moving tropical cyclones can be advected into northern Mexico and the southwestern United States, often leading to the development o

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18

Lee, Cameron C. "The Development of a Gridded Weather Typing Classification Scheme." Thesis, Kent State University, 2014. http://pqdtopen.proquest.com/#viewpdf?dispub=3618946.

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<p> Since their development in the 1990s, gridded reanalysis data sets have proven quite useful for a broad range of synoptic climatological analyses, especially those utilizing a map pattern classification approach. However, their use in broad-scale, surface weather typing classifications and applications have not yet been explored. This research details the development of such a gridded weather typing classification (GWTC) scheme using North American Regional Reanalysis data for 1979-2010 for the continental United States. </p><p> Utilizing eight-times daily observations of temperature, de

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19

Zygmuntowska, Marta, Thorsten Mauritsen, Johannes Quaas, and Lars Kaleschke. "Arctic clouds and surface radiation: a critical comparison of satellite retrievals and the ERA-Interim reanalysis." Atmospheric chemistry and physics (2012) 12, S. 6667-6677, 2012. https://ul.qucosa.de/id/qucosa%3A13793.

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Clouds regulate the Earth’s radiation budget, both by reflecting part of the incoming sunlight leading to cooling and by absorbing and emitting infrared radiation which tends to have a warming effect. Globally averaged, at the top of the atmosphere the cloud radiative effect is to cool the climate, while at the Arctic surface, clouds are thought to be warming. Here we compare a passive instrument, the AVHRR-based retrieval from CM-SAF, with recently launched active instruments onboard CloudSat and CALIPSO and the widely used ERA-Interim reanalysis. We find that in particular in winter months t

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20

Böhm, Christoph [Verfasser], Susanne [Gutachter] Crewell, Stephanie [Gutachter] Fiedler, and Jörg [Gutachter] Bendix. "Atmospheric water supply to the Atacama Desert from newly developed satellite remote sensing techniques and reanalysis / Christoph Böhm ; Gutachter: Susanne Crewell, Stephanie Fiedler, Jörg Bendix." Köln : Universitäts- und Stadtbibliothek Köln, 2021. http://d-nb.info/1230551417/34.

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21

MYTILINAIOS, MICHAIL. "Study of atmospheric desert dust and dust model evaluation through synergy and integration of different measurement techniques." Doctoral thesis, Università degli studi della Basilicata, 2022. http://hdl.handle.net/11563/154145.

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The aim of this thesis is to study the desert dust aerosols and their transport in the atmosphere and in particular to gain insight into the desert dust distribution over North Africa, Middle East and Europe region during a ten-year period, using dust model reanalysis products of various optical and physical dust particle properties. Atmospheric desert dust is one of the major contributors to global aerosol loading and is the dominant component of atmospheric aerosols over large areas of Earth, strongly affecting Earth’s radiative budget and ecosystems. Mineral dust particles, suspended in

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22

Schlegel, Robert William. "Coastal marine heatwaves: Understanding extreme forces." University of the Western Cape, 2017. http://hdl.handle.net/11394/6445.

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Philosophiae Doctor - PhD (Biodiversity and Conservation Biology)<br>Seawater temperature from regional to global scale is central to many measures of biodi- versity and continues to aid our understanding of the evolution and ecology of biolog- ical assemblages. Therefore, a clear understanding of the relationship between marine biodiversity and thermal structures is critical for effective conservation planning. In the an- thropocene, an epoch characterised by anthropogenic forcing on the climate system, future patterns in biodiversity and ecological functioning may be estimated from projected

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23

Johannsen, João Frederico Gonçalves. "Evaluation of land surface temperature in atmospheric reanalyses using Earth observations." Master's thesis, 2019. http://hdl.handle.net/10451/39566.

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Tese de mestrado, Ciências Geofísicas, Universidade de Lisboa, Faculdade de Ciências, 2019<br>A temperatura da superfície terrestre (SKT) é um dos parâmetros-chave nas trocas terra-atmosfera de energia e água. Além disso, é cada vez mais importante na assimilação de dados e na parametrização de variáveis em modelos. Estudos anteriores apontam para subestimações consideráveis da SKT em reanálises, principalmente durante o dia e em regiões semi-áridas e áridas. Na primeira parte desta tese, a SKT de duas reanálises (ERA-Interim e ERA5) do Centro Europeu de Previsão de Tempo a Médio-Prazo (ECMWF)

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24

Stryhal, Jan. "Využití klasifikací atmosférické cirkulace v interpretaci výstupů z klimatických modelů." Doctoral thesis, 2018. http://www.nusl.cz/ntk/nusl-392475.

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The application of atmospheric circulation classifications in the interpretation of climate model outputs Mgr. Jan Stryhal Automated (computer-assisted) classifications of atmospheric circulation patterns (circulation classifications, for short) constitute a tool widely used in synoptic and dynamic climatology to study atmospheric circulation and its link to various atmospheric, environmental, and societal phenomena. The application of circulation classifications to output of dynamical models of the atmosphere has developed considerably since the pioneering studies about three decades ago, ref

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25

"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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26

Vilanova, Cortezón Alba. "Development of a Toolbox to Compare Atmospheric Composition Datasets: Long-term trends in urban NO2 concentrations in Spain derived from CAMS reanalysis and GOME-2 data." Master's thesis, 2022. http://hdl.handle.net/10362/134511.

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Dissertation submitted in partial fulfilment of the requirements for the Degree of Master of Science in Geospatial Technologies<br>Satellite and model atmospheric composition data are stored in different platforms, using heterogeneous file formats, varying spatiotemporal resolutions and noncompatible metadata. Comparing these datasets is not a trivial task, but required in data assimilation, validation and mutual coverage studies. This thesis investigates the prevailing methods used to compare sensor observations with data from the forecast and reanalysis system developed by the Copernicus Atm

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27

Gerstein, Shira. "Land Cover Change and Climate on the North American Great Plains." Thesis, 2014. http://hdl.handle.net/10012/8210.

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Changing land cover from prairie grasslands to intensive, primarily cereal agriculture, over the North American Great Plains since the mid-19th century, has had a hydrological and climatological impact on that ecosystem (Pielke, Sr., et al., 2011). Agriculture has introduced timed harvest seasons, irrigation, and C3 photosynthesizing crops with poorer water efficiency than the grasses it replaced. All of these changes have been linked to exacerbated drought conditions and warmer temperatures; however, few studies have quantified this relationship at the continental scale. In order to evaluate

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