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Dissertations / Theses on the topic 'Air sea interaction'

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Published: 4 June 2021
Last updated: 25 July 2025

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1

Schulz, Eric Werner mathematics UNSW. "Air-sea flux parameterisations in a shallow tropical sea." Awarded by:University of New South Wales. mathematics, 2002. http://handle.unsw.edu.au/1959.4/18659.

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This thesis is a study of the air-sea fluxes of momentum, sensible heat and latent heat. Fluxes are estimated using the covariance, COARE2.6b bulk flux algorithm, and inertial dissipation methods. The bulk algorithm is validated against the covariance fluxes for the first time in a light-wind, shallow tropical sea, with strong atmospheric instability and low sea state conditions. The removal of ship motion contamination is investigated. This is the first study to quantify the errors associated with corrections for ship motion contamination, and the effects of motion contamination on the covari
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2

Kent, John E. "Air-sea interaction patterns in the equatorial Pacific." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 1993. http://handle.dtic.mil/100.2/ADA277305.

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Thesis (M.S. in Meteorology and M.S. in Physical Oceanography) Naval Postgraduate School, December 1993.<br>Thesis advisor(s): James Thomas Murphree ; Peter Chu. "December 1993." Bibliography: p. 88-89. Also available online.
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3

Guo, Larsén Xiaoli. "Air-sea exchange of momentum and sensible heat over the Baltic Sea /." Uppsala : Acta Universitatis Upsaliensis : Univ.-bibl. [distributör], 2003. http://publications.uu.se/theses/91-554-5565-4/.

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4

Mueller, James A. "On the transfer of momentum, heat and mass at the air-sea and air-sea spray interfaces." Access to citation, abstract and download form provided by ProQuest Information and Learning Company; downloadable PDF file, 190 p, 2009. http://proquest.umi.com/pqdweb?did=1833621151&sid=5&Fmt=2&clientId=8331&RQT=309&VName=PQD.

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5

Moulin, Aimie. "Air-sea interaction at the synoptic- and the meso-scale." Thesis, Université Grenoble Alpes (ComUE), 2015. http://www.theses.fr/2015GREAU026/document.

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Cette thèse concerne l'étude de l'interaction air-mer, due aux échanges de mouvements, avec un modèle idéalisé mais consistant. Les études sont réalisées à partir d'un modèle shallow-water bicouches (une pour l'océan et une pour l'atmosphère), avec une fine résolution spatiale et temporelle. L'interaction est uniquement due à la friction de surface entre les deux couches.Elle est implémentée par une loi de friction quadratique. La force appliquée à l'océan est calculée en utilisant la différence de vitesse entre les vents et les courants. Pour la force appliquée à l'atmosphère on distingue deu
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6

Abel, Rafael [Verfasser]. "Aspects of air-sea interaction in atmosphere-ocean models / Rafael Abel." Kiel : Universitätsbibliothek Kiel, 2018. http://d-nb.info/1171800193/34.

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7

Uang, Chien-Liang. "Impacts of air-sea interaction on the development of tropical cyclones." Thesis, University of Reading, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.266143.

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8

Williams, R. G. "The influence of air-sea interaction on ocean synoptic-scale eddies." Thesis, University of East Anglia, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.377713.

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9

Labbri, Giacomo. "Mesoscale Air-Sea interaction during the EUREC4A campaign: case studies analysis." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2021.

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The world ocean is rich in mesoscale structures that locally affect the overlying atmosphere. The interaction of these mesoscale oceanic features with the overlying atmosphere is an interesting topic because of the ubiquity of mesoscale structures in the ocean and the lacking of a definitive representation of the interaction mechanisms. This thesis presents two case studies of air-sea interaction using data collected during the EUREC4A campaign in the tropical north-western Atlantic. The objective is to learn about mesoscale air-sea interaction by case study analysis, particularly for what co
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10

Bell, Michael M. "Air-sea enthalpy and momentum exchange at major hurricane wind speeds." Monterey, Calif. : Naval Postgraduate School, 2010. http://edocs.nps.edu/npspubs/scholarly/dissert/2010/Jun/10Jun%5FBell%5FPhD.pdf.

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Dissertation (Ph.D. in Meteorology)--Naval Postgraduate School, June 2010.<br>Dissertation supervisor: Montgomery, Michael. "June 2010." Description based on title screen as viewed on July 14, 2010. Author(s) subject terms: Air-sea interaction, tropical cyclones, surface fluxes, drag coefficient, CBLAST. Includes bibliographical references (p. 125-131). Also available in print.
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11

Leifer, Ira. "A validation study of bubble mediated air-sea gas transfer modeling." Diss., Georgia Institute of Technology, 1995. http://hdl.handle.net/1853/25774.

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12

Graffino, Giorgio. "A study of air-sea interaction processes on water mass formation and upwelling in the Mediterranean sea." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2015. http://amslaurea.unibo.it/8337/.

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Air-sea interactions are a key process in the forcing of the ocean circulation and the climate. Water Mass Formation is a phenomenon related to extreme air-sea exchanges and heavy heat losses by the water column, being capable to transfer water properties from the surface to great depth and constituting a fundamental component of the thermohaline circulation of the ocean. Wind-driven Coastal Upwelling, on the other hand, is capable to induce intense heat gain in the water column, making this phenomenon important for climate change; further, it can have a noticeable influence on many biologic
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13

Zhang, Fei. "On the Variability of the Wind Stress at the Air-Sea Interface." Scholarly Repository, 2008. http://scholarlyrepository.miami.edu/oa_dissertations/191.

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This dissertation investigates wind-wave-current interaction, wave breaking detection and the analysis of breaking characteristics at the air-sea interface. In-situ data measured during the Shoaling Waves Experiment (SHOWEX) and Baltic Sea Swell Experiment (BASE) are applied in the studies and analysis. Wind, wind stress and wave data were obtained from several Air Sea Interaction Spar (ASIS) buoys. Surface currents were measured by a High-Frequency Ocean Surface Current Radar. Two distinct types of wave-current-wind interaction were observed in the presence of a strong along-coast current. F
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14

Sahlée, Erik. "The Influence of Waves on the Heat Exchange over Sea." Thesis, Uppsala universitet, Luft-, vatten och landskapslära, 2002. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-302874.

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The main focus of this study is the influence of waves on the heat transfer over sea. In particular, the bulk transfer coefficient CH (the Stanton number), has been investigated for possible wave influence. Measurements from the site Östergarnsholm in the Baltic Sea have been used. The site has a large sector with undisturbed over water fetch. Data during the period 1995-1999 have been used. It is shown that CH behaves differently as it approach z/L=0 from the unstable side depending on the wave state. During growing sea, CH makes a rapid drop as it passes over neutrality, strikingly different
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15

Song, Qingtao. "Surface wind response to oceanic fronts /." View online ; access limited to URI, 2006. http://0-wwwlib.umi.com.helin.uri.edu/dissertations/dlnow/3225330.

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16

Bruch, William. "Étude expérimentale et numérique de la génération et du transport des aérosols marins à l'interface air-mer pour des vents forts, et conséquences sur les propriétés de la couche limite atmosphérique marine." Electronic Thesis or Diss., Toulon, 2021. http://www.theses.fr/2021TOUL0002.

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Les embruns sont des aérosols en phase aqueuse générés à la surface de l’eau. Au large, ils sont générés par des mécanismes tel que le déferlement et l’écrêtage. Aujourd’hui, la connaissance portant sur les embruns excédant 20 µm de rayon reste limitée. Cette thèse vise à améliorer la compréhension des processus de génération, de transport, et les impacts sur les propriétés de la couche limite atmosphérique marine (CLAM). La campagne MATE2019 est ainsi menée à l’installation air-mer de Luminy (Marseille, France) afin d’étudier le rôle des interactions vague-vent sur la génération. Une analyse
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17

Pineau-Guillou, Lucia. "Interaction Océan-Atmosphère : amélioration de la tension de vent en modélisation physique côtière." Thesis, Brest, 2018. http://www.theses.fr/2018BRES0064/document.

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Les surcotes de tempête sont souvent sous-estimées dans les modèles hydrodynamiques, ainsi que les grandes vagues dans les modèles de vagues. Les causes possibles sont une sous-estimation des vents dans les modèles atmosphériques et/ou une formulation incorrecte de la tension de vent. Les objectifs de cette thèse sont (1) d’estimer les biais par vents forts dans les modèles atmosphériques (2) de développer une nouvelle paramétrisation du coefficient de traı̂née permettant de réduire ce biais (3) d’étudier l’impact des vagues sur la tension de vent. La méthode consiste à étudier la réponse de l
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18

Fan, Yalin. "Effects of surface waves on air-sea momentum and energy fluxes and ocean response to hurricanes /." View online ; access limited to URI, 2007. http://0-digitalcommons.uri.edu.helin.uri.edu/dissertations/AAI3276981.

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19

Sestito, Benedetta. "The Southern Annular Mode: air-sea interaction and its representation in the last generation climate models." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2022.

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La Southern Annular Mode (SAM) è il modo di variabilità dominante dell'Emisfero Australe extratropicale, definito come la prima funzione ortogonale empirica del geopotenziale a 500 hPa e caratterizzato da un pattern di anomalie del campo di pressione al livello del mare di polarità opposta sull'Antartide e alle medie latitudini. I meccanismi dietro a questo modo di variabilità sono un argomento di crescente interesse per via del trend positivo che la SAM ha mostrato negli ultimi decenni, ricondotto all'aumento di concentrazioni di gas serra e alla riduzione di ozono stratosferico. Comprendere
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20

Shinde, Mahesh. "Implementation of a high resolution regional ocean model for investigating air-sea interaction in the Mediterranean Area." Doctoral thesis, Universitat de Barcelona, 2016. http://hdl.handle.net/10803/396096.

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The investigation of climate variability in different timescales such as daily, monthly, seasonal and inter-annual has utmost importance for managing the socio-economic processes on regional to global scale. Indeed, the variation in the climate has a crucial impact on agriculture, water, health, tourism, economy and transportation. Therefore the development of climate forecasting tools is necessary which helps to manage these sectors more efficiently. However, there are limitations on producing accurate climate forecast for more than two weeks in advance due to the chaotic nature of the climat
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21

Hagelin, Susanna. "Effects of Upwelling Events on the Atmosphere." Thesis, Uppsala universitet, Luft-, vatten och landskapslära, 2006. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-303882.

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During an upwelling event the cold bottom-water is brought to the sea surface. This cools the atmosphere from below and the stratification becomes more stable. When the atmosphere is more stable the turbulence is reduced and, as a consequence, so are the turbulent fluxes. This study is investigating four periods of upwelling from the Östergarnsholm-site, in the Baltic Sea east of Gotland, during the summer of 2005. The air measurements are taken at a tower at the southernmost tip of Östergarnsholm while the measurements in the water are from a buoy moored 1 km south-southeast of the tower. Dur
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22

Crofoot, Robert F. "Investigations of scalar transfer coefficients in fog during the Coupled Boundary Layers and Air Sea Transfer Experiment : a case study." Thesis, Monterey, California. Naval Postgraduate School, 2004. http://hdl.handle.net/10945/1202.

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The uncertainty in the determination of the momentum and scalar fluxes remains one of the main obstacles to accurate numerical forecasts in low to moderate wind conditions. For example, latent heat fluxes computed from data using direct covariance and bulk aerodynamic methods show that there is good agreement in unstable conditions when the latent heat flux values are generally positive. However, the agreement is relatively poor in stable conditions, particularly when the moisture flux is directed downward. If the direct covariance measurements are indeed accurate, then they clearly indic
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23

Savelyev, Ivan. "A Laboratory Study of the Transfer of Momentum Across the Air-Sea Interface in Strong Winds." Scholarly Repository, 2009. http://scholarlyrepository.miami.edu/oa_dissertations/281.

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A quantitative description of wind-wave and wind-current momentum transfer in high wind conditions is currently unresolved, mainly due to the severe character of the problem. It is, however, necessary for accurate wave models, storm and hurricane forecasting, and atmosphere-ocean model coupling. In this research, strongly forced wind-wave conditions were simulated in a laboratory tank. On the air side, a static pressure probe mounted on a vertical wave follower measured wave-induced airflow pressure fluctuations in close proximity to the surface. Vertical profiles of wave-induced pressure fluc
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24

Jeong, Dahai. "Laboratory Measurements of the Moist Enthalpy Transfer Coefficient." Scholarly Repository, 2008. http://scholarlyrepository.miami.edu/oa_theses/145.

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The enthalpy (sensible and latent heat) exchange processes within the surface layers at an air-water interface have been examined in 15-m wind-wave tunnel at the University of Miami. Measurements yielded 72 mean values of fluxes and bulk variables in the wind speed (referred to 10 m) range form 0.6 to 39 m/s, covering a full range of aerodynamic conditions from smooth to fully rough. Meteorological variables and bulk enthalpy transfer coefficients, measured at 0.2-m height, were adjusted to neutral stratification and 10-m height following the Monin-Obukhov similarity approach. The ratio of the
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25

Gozzo, Luiz Felippe. "Simulação numérica da influência dos fluxos de superfície em ciclones na costa leste do sul do Brasil." Universidade de São Paulo, 2010. http://www.teses.usp.br/teses/disponiveis/14/14133/tde-14072010-180123/.

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O papel dos fluxos de superfície de calor sensível e latente (FCSL) em dois ciclones extratropicais com desenvolvimento distinto na costa do sul do Brasil foi avaliado a partir de simulações numéricas utilizando o modelo de área limitada WRF versão 2.2. Em um dos ciclones, a circulação se originou em baixos níveis e propagou-se para a média troposfera (ciclone 1). No outro ciclone (ciclone 2) a circulação originou-se em níveis médios e propagou-se até a superfície. Foram realizadas simulações numéricas com e sem FCSL para cada um dos ciclones. A trajetória do ciclone 1 foi fortemente alterada
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26

Carlsson, Björn. "Implementation and Analysis of Air-Sea Exchange Processes in Atmosphere and Ocean Modelling." Doctoral thesis, Uppsala universitet, Institutionen för geovetenskaper, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-9520.

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To understand and to predict the weather and climate, numerical models are important tools and it is crucial that the controlling processes are described correctly. Since 70% of the global surface is covered with water the description how the ocean and atmosphere communicates has a considerable impact. The ocean–atmosphere exchange occurs through transport of momentum (friction) and heat, governed by turbulent eddies. The sea surface is also an important source of turbulence in both directions. The scales of the turbulent eddies cannot be resolved in ocean and climate models. Therefore, the tu
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27

Farrar, J. Thomas (John Thomas) 1976. "Air-sea interaction at contrasting sites in the Eastern Tropical Pacific : mesoscale variability and atmospheric convection at 10°N." Thesis, Massachusetts Institute of Technology, 2006. http://hdl.handle.net/1721.1/39009.

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Thesis (Ph. D.)--Joint Program in Oceanography/Applied Ocean Science and Engineering (Massachusetts Institute of Technology, Dept. of Earth, Atmospheric, and Planetary Sciences; and the Woods Hole Oceanographic Institution), 2007.<br>Includes bibliographical references (p. 153-166).<br>The role of ocean dynamics in driving air-sea interaction is examined 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) reveal
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28

LOPEZ, CASTAŇO SANTIAGO. "On the Large-eddy Simulation of Coupled Flows in Air-Water Systems." Doctoral thesis, Università degli Studi di Trieste, 2018. http://hdl.handle.net/11368/2922576.

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L'obiettivo di questo lavoro è quello di sviluppare un metodo efficiente di decomposizione dei domini per la simulazione di vari flussi di fluido, di interesse per la meccanica dei fluidi, geofisica e ambientale, utilizzando griglie non sovrapposte in un solutore LES. Viene mostrato un metodo di decomposizione del dominio di sub-strutturazione esplicita che applica le condizioni di compatibilità presenti tra flussi di fluido non miscibili. L'attuale metodologia è utilizzata per lo studio dei flussi archètipo accoppiati in direzione co-corrente e controcorrente, per numeri di Reynolds bassi
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29

Reineman, Benjamin D. "The Development of Instrumentation and Methods for Measurement of Air-Sea Interaction and Coastal Processes from Manned and Unmanned Aircraft." Thesis, University of California, San Diego, 2013. http://pqdtopen.proquest.com/#viewpdf?dispub=3557102.

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<p> I present the development of instrumentation and methods for the measurement of coastal processes, ocean surface phenomena, and air-sea interaction in two parts. In the first, I discuss the development of a portable scanning lidar (light detection and ranging) system for manned aircraft and demonstrate its functionality for oceanographic and coastal measurements. Measurements of the Southern California coastline and nearshore surface wave fields from seventeen research flights between August 2007 and December 2008 are analyzed and discussed. The October 2007 landslide on Mt. Soledad in La
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30

Greenwood, Andrew D. "Azimuth Modulation of the Radar Backscatter at Near-Normal Incidence." BYU ScholarsArchive, 2003. https://scholarsarchive.byu.edu/etd/70.

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Radar observations of the ocean surface are becoming increasingly important. Common applications are wind retrieval and global weather forecasting and characterization. Because of the common use of ocean radar measurements, it is important to understand the sensitivity of the backscatter to both radar parameters and surface parameters. At near-normal incidence angles, it has been assumed that the radar backscatter exhibits little or no azimuth dependence (Colton, 1989). However, recent data taken by the BYU YSCAT radar system suggests that this is not the case. At an incidence angle of 10°, th
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31

Klein, Angelika [Verfasser], and Bernd [Akademischer Betreuer] Jähne. "The fetch dependency of small-scale air-sea interaction processes at low to moderate wind speeds / Angelika Klein ; Betreuer: Bernd Jähne." Heidelberg : Universitätsbibliothek Heidelberg, 2019. http://d-nb.info/1188320343/34.

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32

Uhlhorn, Eric W. "Gulf of Mexico Loop Current Mechanical Energy and Vorticity Response to a Tropical Cyclone." Scholarly Repository, 2008. http://scholarlyrepository.miami.edu/oa_dissertations/81.

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The ocean mixed layer response to a tropical cyclone within, and immediately adjacent to, the Gulf of Mexico Loop Current is examined using a combination of ocean profiles and a numerical model. A comprehensive set of temperature, salinity, and current profiles acquired from aircraft-deployed expendable probes is utilized to analyze the three-dimensional oceanic energy and circulation evolution in response to Hurricane Lili's (2002) passage. Mixed-layer temperature analyses show that the Loop Current cooled <1 degree C in response to the storm, in contrast to typically observed larger decrease
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33

Svensson, Andreas. "Humidity Structures in the Marine Atmospheric Boundary Layer." Thesis, Uppsala universitet, Luft-, vatten och landskapslära, 2002. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-302863.

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The turbulence structure over the sea was studied with the emphasis on humidity. The data sets used came from the island of Östergarnsholm outside Gotland in the Baltic Sea. The study included spectral and quadrant analyses of the wind, temperature and humidity parameters from one measuring level. The wave state of the sea was deduced from data from a wave rider buoy anchored 4 km from the site.Two turbulence instruments for humidity were compared, the MIUU instrument (hot wire) and an open pass infrared gas analyser from LI-COR. The comparison showed that the LI-COR instrument resolved the hi
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34

Agudelo, Paula A. "Role of Local Thermodynamic Coupling in the Life Cycle of the Intraseasonal Oscillation in the Indo-Pacific Warm Pool." Diss., Georgia Institute of Technology, 2007. http://hdl.handle.net/1853/19834.

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Intraseasonal oscillations (ISOs) are important elements of the tropical climate with time-scales of 20-80 day. The ISO is poorly simulated and predicted by numerical models. This work presents a joint diagnostic and modeling study of the ISO that examines the hypothesis that local coupling between the ocean and the atmosphere is essential to the existence and evolution of the ISO in the Indo-Pacific warm pool region. Low-level moistening during the transition phase preconditions the atmosphere for deep convection. The vertical structure of ISO from the ECMWF coupled model during different ph
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35

Lenain, Luc. "Etudes expérimentales et numériques de la dynamique des vagues et leurs implications pour les échanges océan - atmosphère." Thesis, Université Paris-Saclay (ComUE), 2017. http://www.theses.fr/2017SACLN033/document.

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Au cours des dernières décennies, les communautés de recherches océanographiques et atmosphérique ont démontrées que pour améliorer notre compréhension du couplage entre l'atmosphère et l'océan, et le paramétrage du flux de masse entre l'océan et l'atmosphère (gaz, aérosols, par exemple) , de moment (pour la génération de vagues et de courants marins) et d'énergie (flux de chaleur et énergie cinétique pour les courants et le processus de mélange près de la surface ) dans les modèles couplés océan-atmosphère, les vagues doivent être prises en compte. La physique du couplage dépend de la cinémat
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36

Nguyen, Hue Thi Thanh. "Interactions air-mer en Asie du Sud-Est : évaluation de l'impact d'ENSO canonique et/ENSO Modoki sur la variabilité des précipitations et caractérisation des échanges thermiques air-mer sur les périodes historiques et futures." Electronic Thesis or Diss., Toulouse 3, 2023. http://www.theses.fr/2023TOU30379.

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L'Asie du Sud-Est (SEA pour Southeast Asia) regroupe 10% de la population mondiale et est soumise à un large éventail de facteurs et aléas climatiques : typhons, mousson, Oscillation Australe El Niño (ENSO), changement climatique... A l'interface entre l'Océan Indien, l'Océan Pacifique et l'atmosphère, cette région, qui comprend le continent maritime, est de plus un élément clé du fonctionnement de la circulation océanique et atmosphérique globale. L'objectif général de cette thèse est de mieux comprendre le fonctionnement et l'impact des interactions air-mer dans le climat d'Asie du Sud-Est.
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37

Crofoot, Robert Farrington. "Investigations of scalar transfer coefficients in fog during the Coupled Boundary Layers and Air Sea Transfer experiment : a case study." Thesis, Massachusetts Institute of Technology, 2004. http://hdl.handle.net/1721.1/39165.

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Thesis (S.M.)--Joint Program in Applied Ocean Science and Engineering (Massachusetts Institute of Technology, Dept. of Ocean Engineering; and the Woods Hole Oceanographic Institution), 2005.<br>Includes bibliographical references (leaves 70-72).<br>The uncertainty in the determination of the momentum and scalar fluxes remains one of the main obstacles to accurate numerical forecasts in low to moderate wind conditions. For example, latent heat fluxes computed from data using direct covariance and bulk aerodynamic methods show that there is good agreement in unstable conditions when the latent h
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38

Stanley, Rachel H. R. "A determination of air-sea gas exchange and upper ocean biological production from five noble gasses and tritiugenic helium-3." Thesis, Massachusetts Institute of Technology, 2007. http://hdl.handle.net/1721.1/42282.

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Thesis (Ph. D.)--Joint Program in Chemical Oceanography (Massachusetts Institute of Technology, Dept. of Earth, Atmospheric, and Planetary Sciences; and the Woods Hole Oceanographic Institution), 2007.<br>Includes bibliographical references (p. 215-225).<br>The five noble gases (helium, neon, argon, krypton, and xenon) are biologically and chemically inert, making them ideal oceanographic tracers. Additionally, the noble gases have a wide range of solubilities and molecular diffusivities, and thus respond differently to physical forcing. Tritium, an isotope of hydrogen, is useful in tandem wit
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39

Hennon, Paula Ann. "The role of the ocean in convective burst initiation: implications for tropical cyclone intensification." The Ohio State University, 2006. http://rave.ohiolink.edu/etdc/view?acc_num=osu1135914268.

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40

Zhang, Jun. "An Airborne Investigation of the Atmospheric Boundary Layer Structure in the Hurricane Force Wind Regime." Scholarly Repository, 2007. http://scholarlyrepository.miami.edu/oa_dissertations/15.

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As part of the ONR sponsored Coupled Boundary Layer/Air-Sea Transfer (CBLAST) experiment, data from the NOAA WP-3D research aircraft measurements into major Hurricanes in the 2002-2004 seasons are analyzed to investigate the structure of the boundary layer. The turbulent fluxes of momentum and enthalpy are derived using the eddy correlation method. For the first time, the momentum and enthalpy fluxes were directly measured in the boundary layer of a hurricane with wind speeds up to 30 m/s. A new bulk parameterization of the momentum and enthalpy flux is developed. The vertical structure of t
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41

Avenas, Arthur. "Tropical cyclone dynamics revealed by satellite ocean surface wind speeds observations : the key contribution of the near-core surface wind structure." Electronic Thesis or Diss., Ecole nationale supérieure Mines-Télécom Atlantique Bretagne Pays de la Loire, 2024. http://www.theses.fr/2024IMTA0397.

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Malgré les avancées dans la prédiction de la trajectoire des cyclones tropicaux et des vitesses de vent dans la région externe, la représentation numérique des vents les plus forts associés aux événements les plus intenses demeure une question ouverte, principalement en raison de la faible taille du cœur du cyclone et de la difficulté à comprendre et résoudre les échanges turbulents entre l’océan et l’atmosphère. Les limitations observationnelles ont longtemps entravé des mesures précises de la surface océanique près de la région centrale dans des conditions de vent extrême, tandis que les sat
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42

Alves, Jose Henrique Gomes de Mattos Mathematics UNSW. "A Saturation-Dependent Dissipation Source Function for Wind-Wave Modelling Applications." Awarded by:University of New South Wales. Mathematics, 2000. http://handle.unsw.edu.au/1959.4/17786.

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This study reports on a new formulation of the spectral dissipation source term Sds for wind-wave modelling applications. This new form of Sds features a nonlinear dependence on the local wave spectrum, expressed in terms of the azimuthally integrated saturation parameter B(k)=k^4 F(k). The basic form of this saturation-dependent Sds is based on a new framework for the onset of deep-water wave breaking due to the nonlinear modulation of wave groups. The new form of Sds is succesfully validated through numerical experiments that include exact nonlinear computations of fetch-limited wind-wave ev
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43

Berthou, Ségolène. "Sensibilité des précipitations extrêmes au couplage sous-mensuel atmosphère-océan en Méditerranée nord-occidentale : approche par la modélisation climatique régionale." Thesis, Paris 6, 2015. http://www.theses.fr/2015PA066477/document.

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Chaque automne, des événements de précipitations intenses (HPEs) ont lieu en Méditerranée nord-occidentale. Cette thèse adopte une approche par la modélisation climatique régionale couplée atmosphère-océan pour traiter de la sensibilité de ces événements à des changements de température de surface de la mer (SST) résultant soit de biais dans le modèle couplé, soit de la réponse de la couche de mélange océanique à des forçages atmosphériques. Deux cas d’études mettent en évidence la sensibilité particulière des zones de convergence d’humidité aux changements de SST. L’élaboration d’indices synt
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44

Semedo, Alvaro. "Atmosphere-ocean Interactions in Swell Dominated Wave Fields." Doctoral thesis, Uppsala universitet, Geovetenskapliga sektionen, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-130650.

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Ocean wind waves represent the atmosphere-ocean boundary, playing a central role in the air-sea exchanging processes. Heat, mass and momentum are transferred across this boundary, with waves mediating the exchange of principally the momentum between the winds and the ocean surface. During the generation process waves are called wind sea. When they leave their generation area or outrun their generating wind they are called swell. The wave field can be said to be dominated either by wind sea or swell. Depending on the wave regime the momentum and energy exchanging processes and the degree of cou
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45

DI, SANTE FABIO. "Assessing the role of local air–sea interaction over the South Asia region in simulating the Indian Summer Monsoon (ISM) using the new earth system model RegCM-ES." Doctoral thesis, Università degli Studi di Trieste, 2017. http://hdl.handle.net/11368/2908151.

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The understanding and prediction of the monsoon variability over South Asia region is one of the biggest challenges for climatologist and meteorologist today. The Indian Summer Monsoon (ISM) has different temporal and spatial scales of variability and it is mainly driven by strong air sea interactions. In this thesis we evaluate the performance of the new regional Earth System Model (ESM) RegCM-ES in reproducing the main characteristics of the ISM rainfall (ISMR). We performed two sets of simulations, one with the new RegCM-ES and another with the stand-alone version of the atmospheric compone
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46

Fletcher, Andrew S. "An Implementation of Field-Wise Wind Retrieval for Seawinds on QuikSCAT." BYU ScholarsArchive, 2003. https://scholarsarchive.byu.edu/etd/69.

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Field-wise wind estimation (also known as model-based wind estimation) is a sophisticated technique to derive wind estimates from radar backscatter measurements. In contrast to the more traditional method known as point-wise wind retrieval, field-wise techniques estimate wind field model parameters. In this way, neighboring wind vectors are jointly estimated, ensuring consistency. This work presents and implementation for field-wise wind retrieval for the SeaWinds scatterometer on the QuikSCAT satellite. Due to its sophistication, field-wise wind retrieval adds computational complexity and int
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47

Berthou, Ségolène. "Sensibilité des précipitations extrêmes au couplage sous-mensuel atmosphère-océan en Méditerranée nord-occidentale : approche par la modélisation climatique régionale." Electronic Thesis or Diss., Paris 6, 2015. http://www.theses.fr/2015PA066477.

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Chaque automne, des événements de précipitations intenses (HPEs) ont lieu en Méditerranée nord-occidentale. Cette thèse adopte une approche par la modélisation climatique régionale couplée atmosphère-océan pour traiter de la sensibilité de ces événements à des changements de température de surface de la mer (SST) résultant soit de biais dans le modèle couplé, soit de la réponse de la couche de mélange océanique à des forçages atmosphériques. Deux cas d’études mettent en évidence la sensibilité particulière des zones de convergence d’humidité aux changements de SST. L’élaboration d’indices synt
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48

Smith, Justin DeWitt. "Studies to Improve Estimation of the Electromagnetic Bias in Radar Altimetry." BYU ScholarsArchive, 2003. https://scholarsarchive.byu.edu/etd/75.

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In May of 2000 Jason-1, a joint project between NASA and the French space agency CNES, will be launched. Its mission is to continue the highly successful gathering of data which TOPEX/Poseidon has collected since August of 1992. The main goal of Jason-1 is to achieve higher accuracy in measuring the mean sea level (MSL). In order to do so, the electromagnetic (EM) bias must be estimated more accurately because it is the largest contributing error. This thesis presents two different studies which add to the knowledge and improve estimation of the EM bias, and thus assists Jason-1 in achieving i
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49

Barrowes, Benjamin E. "YSCAT Backscatter Distributions." BYU ScholarsArchive, 2003. https://scholarsarchive.byu.edu/etd/67.

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YSCAT is a unique ultrawideband microwave scatterometer developed to investigate the sea surface under a variety of environmental and radar parameters. The YSCAT94 experiment consisted of a six month deployment on the WAVES research tower operated by the Canada Center for inland Waters (CCIW). Over 3500 hours of data were collected at 2Γ 3.05Γ 5.3Γ 10.02Γ and 14 GHz and at a variety of wind speeds, relative azimuth angles, and incidence angle. A low wind speed "rolloff" of the normalized radar cross section (σ°) in YSCAT94 data is found and quantified. The rolloff wind speedΓ γΓ is estimated t
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50

Wimart-Rousseau, Cathy. "Dynamiques saisonnière et pluriannuelle du système des carbonates dans les eaux de surface en mer Méditerranée." Electronic Thesis or Diss., Aix-Marseille, 2021. http://www.theses.fr/2021AIXM0503.

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La mer Méditerranée est souvent considérée comme un océan laboratoire pour comprendre les changements globaux liés à l’augmentation de CO2 atmosphérique. Ce travail, basé sur l’étude de données recueilles dans trois régions méditerranéennes, étudie les variations du CO2 océanique dans ce bassin. À l’échelle de la saison, outre les changements de température, le contenu en alcalinité influe sur le contenu en CO2 en Méditerranée orientale, tandis que les changements en carbone total sont responsables des variations dans le bassin occidental. En zone côtière urbanisée, l’émission de CO2 anthropiq
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