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McElroy, Kenneth L. "The atmospheric emission method of calculating the neutral atmosphere and changed particle densities in the upper atmosphere". Thesis, Monterey, California. Naval Postgraduate School, 1992. http://hdl.handle.net/10945/23548.
Pełny tekst źródłaMartello, Robert 1968. "Land atmosphere interaction and atmospheric mixed layer height evolution". Thesis, Massachusetts Institute of Technology, 1996. http://hdl.handle.net/1721.1/38774.
Pełny tekst źródłaErculiani, Marco. "Atmosphere in a test tube: laboratory investigations about exoplanet atmospheres". Doctoral thesis, Università degli studi di Padova, 2015. http://hdl.handle.net/11577/3424370.
Pełny tekst źródłaLo scopo di questa tesi è quello di capire come dei cianobatteri, cresciuti su un pianeta di tipo terrestre orbitante attorno alla zona di abitabilità di una stella M possano sopravvivere ed usare la luce proveniente dalla stella stessa in modo fruttuoso per la loro esistenza. In particolare ci focalizzeremo sullo studio dei gas da essi prodotti. Gli organismi scelti non hanno pigmenti in grado di fotosintetizzare la parte NIR dello spettro di radiazione, ma riescono a modificare il loro apparato fotosintetico per far fronte alle nuove condizioni di luce, se esposti a luce NIR, producendo clorofilla d ed f. I due batteri scelti per i nostri esperimenti sono Chlorogloeopsis fritschii e Cyanobacterium Aponinum. Il primo batterio è certamente in grado di variare il suo apparato fotosintetico in differenti situazioni luminose. In particolare è in grado di produrre clorofilla e ed f se esposto a luce NIR (720 nm). Questa proprietà si chiama acclimatamento FarLip. Il secondo batterio è è abbastanza noto ma non è stata ancora studiata la sua predisposizione a questo tipo di pratica. Per questi batteri sono stati ricercati i terreni di coltura, di temperatura e pH che meglio permettessero il loro sviluppo. Per capire come il foto-acclimatamento possa aver luogo abbiamo ideato e realizzato un nuovo tipo di sorgente a LED con peculiarità dinamiche. L'intervallo di lunghezze d'onda che copre (365nm-940nm) si sovrappone ai limiti di assorbimento dei pigmenti fotosintetici (280-850 nm) dei più comuni batteri. Il simulatore è composto da 25 differenti canali corrispondenti a 25 differenti lunghezze d'onda. Ogni canale può ospitare un massimo di 15 LED. Il simulatore come detto è stato concepito secondo il concetto di modularità. Infatti è composto da un mosaico di piastre in corma circolare divisa a spicchi e su ognuna di tali piastre sono saldati i LED. Questa soluzione permette di cambiare rapidamente i LED danneggiati e permette una facile implementazione con altre lunghezze d'onda. Il simulatore stellare è in grado di riprodurre lo spettro di varie stelle di sequenza principale, F, G, K e M e molte delle più comuni lampade. Il sistema di controllo è composto da un PC che ha il compito di gestire i LED e da uno spettrometro con relativo correttore di coseno che STS-VIS della ditta Ocean Optics. Il PC genera il miglior fit dello spettro da ricreare con l'illuminatore e lgi da informazioni su come riprodurlo. Lo spettrometro invece controlla la bontà del fit ed attraverso un sistema a circuito chiuso, regola la luminosità dei LED in tempo reale. Abbiamo fatto dei test per verificare il corretto funzionamento del simulatore e stimato la potenza totale emanata, 106.22 W e quella termica, 434.05 W. Inoltre la nostra sorgente di radiazione è stata caratterizzata in flusso, analizzando la radiazione a diverse distanze, dalla bocca di apertura fino a 25 cm da essa. Poi sono state fatte misure di uniformità del flusso entro 6.5 cm dal centro. Infine è stato calcolato l'assorbimento dovuto alle ottiche frapposte fra i LED e i campioni. Per alloggiare i batteri abbiamo ideato e costruito in incubatore in acciaio inox con la possibilità di avere un continuo flussaggio di gas o di essere riempita con una miscela desiderata. Sui lati si aprono quattro finestre ottiche che servono per permettere la misura di concentrazione di ossigeno e di anidride carbonica all'interno attraverso un sistema laser chiamato Tunable Diode Laser Absorption Spectroscopy (TDLAS). L'incubatore è dotato anche di una finestra superiore in borosilicato per permettere alla luce di entrarvi. La cella è stata caratterizzata termicamente e sono stati calcolati le quantità minime osservabili sia di ossigeno che di anidride carbonica. Durante la prima fase dell'esperimento, i batteri selezionati sono stati fatti crescere per 24 giorni Durante l'esperimento, i batteri sono stati fatti crescere a 24 days at 20 micromol fotoni/m^2/s e a 30 °C per costruire le curve di crescita ed il loro comportamento in condizioni ottimali. Dopo ciò, è stato condotto un secondo esperimento facendo crescere entrambe se specie di cianobatteri a 30°C e 20 micromol fotoni/m^2/s in luce bianca ed acquisendo dopo 6 giorni le misure di produttività di ossigeno durante la fase esponenziale. Passati sei giorni sono stati ripartite otto colture, quattro di Cyanobacterium aponinum e quattro di Chlorogloeopsis fritschii. Due colture di Cyanobacterium aponinum sono state fattie crescere prima a micromol fotoni/m^2/s per sei giorni e poi a 100 micromol fotoni/m^2/s per altri tre giorni, sempre in luce bianca. La stessa cosa è stata fatta per due campioni di Chlorogloeopsis fritschii. Due colture di Cyanobacterium aponinum sono state fattie crescere prima a micromol fotoni/m^2/s per sei giorni e poi a 100 micromol fotoni/m^2/s per altri tre giorni,con una radiazione che simulava quella di una stella di tipo M7 incidente su un pianeta terrestre. La stessa cosa è stata fatta per Chlorogloeopsis fritschii. La temperatura è stata mantenuta a 30°C per i campioni in luce bianca e fra 35°C e 38°C per gli esemplari illuminati con luce M7. La maggior temperatura nel secondo caso è stata dovuta al calore prodotto dai LED. Durante i tre giorni in cui i campioni sono stati sottoposti a 100 micromol fotoni/m^2/s sono state prese misure di densità ottica e calcolate le curve di crescita. Inoltre per ogni campione è stata calcolata la produzione di ossigeno. Infine i campioni sono stati analizzati anche dal punto di vista del cromatismo per capire come il loro colore fosse collegato alla vitalità
Tice, Dane Steven. "Ground-based near-infrared remote sounding of ice giant clouds and methane". Thesis, University of Oxford, 2014. http://ora.ox.ac.uk/objects/uuid:4f09f270-a25c-4d36-96d3-13070a594eaa.
Pełny tekst źródłaFranks, Stewart William. "The representation of land surface - atmosphere fluxes for atmospheric modelling". Thesis, Lancaster University, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.387430.
Pełny tekst źródłaRose, Kathleen A. "Environment "atmosphere" /". Online version of thesis, 1989. http://hdl.handle.net/1850/11084.
Pełny tekst źródłaSteiner, Allison L. "The influence of atmospheric chemistry and climate on atmosphere-biosphere interactions". Diss., Georgia Institute of Technology, 2003. http://hdl.handle.net/1853/25751.
Pełny tekst źródłaEichelberger, Scott James. "The effects of meridional heating gradients on the atmospheric general circulation and its variability /". Thesis, Connect to this title online; UW restricted, 2005. http://hdl.handle.net/1773/10029.
Pełny tekst źródłaGeißler, Christoph, i Ch Jacobi. "Forcing of the Quarterdiurnal Tide". Universität Leipzig, 2018. https://ul.qucosa.de/id/qucosa%3A31792.
Pełny tekst źródłaMit dem Modell für die mittlere und obere Atmosphäre MUAM wurden Ensemble-Berechnungen für den Zeitraum 2000 bis 2010 durchgeführt und die vierteltägigen Gezeiten analysiert. Es wird auf die globale zeitliche und räumliche Verteilung der vierteltägigen Gezeiten eingegangen und deren Anregungsmechanismen untersucht. Die vierteltägigen Gezeiten zeigen einen ähnlichen Verlauf über das Jahr auf der Nord- und Südhalbkugel mit Maxima der Amplitude im späten Winter und Frühjahr sowie im Herbst. Ein ähnliches Bild zeigt sich auch für die Verteilung im Breiten-Höhen-Schnitt, wo die größten Amplituden der vierteltätigen Gezeiten in den mittleren Breiten zu finden sind. Aufgrund der abnehmenden Dichte mit der Höhe ist eine allgemeine Zunahme der Amplituden mit der Höhe zu beobachten. Es zeigte sich, dass der direkte solare Antrieb am stärksten ausgeprägt ist, aber auch, dass der nichtlinearer Antrieb und die Interaktion von Schwerewellen mit anderen Gezeiten einen nicht zu vernachlässigenden Einfluss auf die vierteltägigen Gezeiten in der mittleren und oberen Atmosphäre haben.
Sefcik, Lesley T. "Biophere-atmosphere interactions Northern hardwood seedling responses to anthropogenic atmospheric resource alteration". Saarbrücken VDM Verlag Dr. Müller, 2001. http://d-nb.info/988972131/04.
Pełny tekst źródłaSefcik, Lesley T. "Biophere-atmosphere interactions : Northern hardwood seedling responses to anthropogenic atmospheric resource alteration /". Saarbrücken : VDM Verlag Dr. Müller, 2008. http://d-nb.info/988972131/04.
Pełny tekst źródłaRobertson, Lynette B. "Radon emissions to the atmosphere and their use as an atmospheric tracer". Thesis, University of Edinburgh, 2004. http://hdl.handle.net/1842/14311.
Pełny tekst źródłaJames, Alexander. "Impacts of meteoric material on Earth's atmosphere : laboratory studies with atmospheric implications". Thesis, University of Leeds, 2016. http://etheses.whiterose.ac.uk/16617/.
Pełny tekst źródłaMantini, Jennifer Lynn. "A LABORATORY INVESTIGATION OF THE STRUCTURE OF TORNADO-LIKE VORTICES THROUGH MEASUREMENT OF SURFACE PRESSURE". Miami University / OhioLINK, 2008. http://rave.ohiolink.edu/etdc/view?acc_num=miami1218653459.
Pełny tekst źródłaLee, Wei-Liang. "Radiative transfer in atmosphere-ocean and atmosphere-mountain systems application and parameterization /". Diss., Restricted to subscribing institutions, 2008. http://proquest.umi.com/pqdweb?did=1581421911&sid=1&Fmt=2&clientId=1564&RQT=309&VName=PQD.
Pełny tekst źródłade, la Cruz Rodríguez Jaime. "Measuring the solar atmosphere". Doctoral thesis, Stockholms universitet, Institutionen för astronomi, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-43646.
Pełny tekst źródłaAt the time of the doctoral defense, the following papers were unpublished and had a status as follows: Paper 1: Submitted. Paper 2: Manuscript. Paper 3: Submitted. Paper 4: Submitted.
Munro, Rosemary. "Middle atmosphere water vapour". Thesis, University of Oxford, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.293409.
Pełny tekst źródłaBohnert, Jason Thomas. "Atmosphere transformation & process /". Morgantown, W. Va. : [West Virginia University Libraries], 2002. http://etd.wvu.edu/templates/showETD.cfm?recnum=2739.
Pełny tekst źródłaTitle from document title page. Document formatted into pages; contains iv, 52 p. : col. ill. Vita. Includes abstract. Includes bibliographical references (p. 32).
Yiġit, Erdal. "Modelling atmospheric vertical coupling : role of gravity wave dissipation in the upper atmosphere". Thesis, University College London (University of London), 2009. http://discovery.ucl.ac.uk/17972/.
Pełny tekst źródłaMohr, Karen Irene. "An investigation of land/atmosphere interactions : soil moisture, heat fluxes, and atmospheric convection /". Digital version:, 2000. http://wwwlib.umi.com/cr/utexas/fullcit?p9992875.
Pełny tekst źródłaEvdokimova, Daria. "Étude des espèces mineures dans la mésosphère nocturne de Vénus". Thesis, université Paris-Saclay, 2021. http://www.theses.fr/2021UPASP039.
Pełny tekst źródłaChemical processes of the dense CO2-atmosphere of Venus are determined by trace gases such as SO2, O3, H2O, CO, etc. Among these atmospheric components, a group of sulfur and oxygen compounds occupies a central position. The objective of this thesis is a study of sulfur dioxide and ozone at the night side of Venus' upper mesosphere that is related to altitudes from 85 to 110 km. Chemistry and dynamics of this altitude range is very active. The sulfuric chemical cycle in the mesosphere leads to a formation of the thick cloud deck at 47-70 km globally enshrouding the planet. Furthermore, it has not yet been determined exactly which chemical interactions are responsible for stabilizing the equilibrium in the chemical cycles of the atmosphere, and maintaining a high mixing ratio of CO2. The difficulty of evaluating the oxidizing capacity of the atmosphere, due to the lack of direct measurements of the amount of molecular oxygen, is one reason for this. However, indirect O2 estimations can be made based on derivatives of this molecule, and one of them is ozone. This gas is involved in reactions with species, probably mainly chlorinated compounds, leading to the general chemical cycles.The research is based on the data obtained from the first stellar occultation experiment released for Venus. It was performed by the UV channel of the SPICAV spectrometer onboard Venus Express orbiter working in 2006-2014. This is a powerful instrument to measure absorption of CO2, SO2 and O3 at the night side of Venus’ atmosphere above the cloud layer. This study also includes a detailed assessment of the accuracy of the spectral data processing methods used to retrieve vertical atmospheric gas concentration distributions. Mainly it concerns a separation of a stellar light from UV emission signal originated from different spread sources, which is a parasitic light for the stellar occultation data investigation. A significant influence of a calibration assignment of wavelength to a digital pixel number was obtained. The required accuracy was achieved by a determination of stellar lines position for a large set of stars' spectra measuring in each observational session. Thus, it allowed to establish a profile of the SO2 content from 85 km to 100 km mainly devoted to mid-latitudinal range. On average, it shows a stable mixing ratio with altitude. For this gas, a prevailed short-period variability has been confirmed. However, a weak possible increase of SO2 abundance with local time is noticed from the morning to the evening terminator at 90-95 km. After the discovery of the ozone layer on Venus made by Montmessin et al. (2011), the ozone content was confirmed in more than 100 occultation sessions. The current study also shows that the detected ozone values correspond to its maximum values rather than to the thick stable layer. These results are the first detailed vertical distribution of the SO2 and O3 content in the upper mesosphere on the night side, which opens up new possibilities for the theoretical description of processes occurring in the atmosphere of Venus
Jougla, Thibault. "Sur l'émergence et l'évolution des jets et des vortex dans les atmosphères planétaires turbulentes". Thesis, Université Grenoble Alpes (ComUE), 2018. http://www.theses.fr/2018GREAU043/document.
Pełny tekst źródłaThis thesis investigates the formation and evolution of jets andvortices in turbulent planetary atmospheres using a dual approach ofhigh-resolution numerical simulations and novel laboratoryexperiments. A two-layer quasi-geostrophic beta-channel shallow watermodel is used for the numerical study. As in Panetta (1988), avertical shear is implemented to represent a spatially-meanlatitudinal temperature gradient, which is partially maintained bythermal damping. Baroclinic instabilities work to erode thetemperature gradient, while thermal damping acts to restore it. Asthe basic state vertical shear is unstable, the thermal damping cannotlead to a full recovery, thus modifying subsequent instabilities andleading to rich nonlinear dynamical behaviour.First, we consider flow over a flat bottom, and model convectivemotions like those thought to occur on Jupiter by pairs ofcyclones/anti-cyclones or `hetons' as in Thomson (2016). We therebyobtain predominantly baroclinic jets, oscillating between quiescentphases, when jets are zonal and the energy is nearly stationary, andturbulent phases, when the flow loses its zonality, vortices pinch offfrom the meandering jets, and zonal energy components drop while eddyenergy components increase. These turbulent phases typically last fora thermal damping relaxation period. The impacts of vertical shear(baroclinicity), thermal damping and heton forcing are comprehensivelyinvestigated by considering the energy transfers occurring betweenkinetic and potential energy, their barotropic and baroclinic parts aswell as their zonal and eddy parts. This leads to a rethinking of theclassic paradigm of energy transfer presented by Salmon (1982), asthis paradigm is too simplistic to explain the results found.Then, we consider the effect of large-scale bottom topography, as afirst approach to understanding the role of topography in jet andvortex formation. We use the same model as in the first study butinclude a linearly sloping topography which has the advantage of beingcharacterised by a single parameter, the slope. We omit the hetonforcing and instead perturb the flow with a small amplitude Rossbywave initially. The main effect of heton forcing is actually to act asa kind of damping: energy fluctuations are consistently less extremethan when no forcing is used. A linear stability analysis is carriedout to motivate a series of nonlinear simulations investigating theeffect of topography, in particular, differences from the flat bottomcase previously examined. We find that destabilising topography makesthe jets more dynamic.In the experimental part, a two-layer salt-stratified fluid is used ina rotating tank with a differentially rotating lid to generate theshear across the interface. We consider a baroclinically unstablefront in the regime of amplitude vacillation, which is found to becharacterised by the sequential emergence and disappearance of alarge-scale vortex. Analysing two similar experiments at the limit ofgeostrophy, with different Rossby numbers Ro=0.4 and Ro=0.6, showssurprisingly different behaviours, with a baroclinic dipole for small,and a barotropic vortex for the large Rossby number. The small-scalewave activity is explored using different methods, and the resultssuggest small, spontaneously-arising inertia-gravity waves precedingthe emergence of the vortex which stirs the interface, thus having animpact on the mixing between the two layers. The recovery period ofthe amplitude vacillation, as well as the intensity of the vortex,increases with the Rossby number.For further research on fronts at two-layer immiscible interfaces, avery accurate novel optical method has been developed to detect theheight and slope, based on the refractive laws of optics. Theassociated theoretical equations are solved numerically and validatedin various idealised situations
Drysdale, Euain Fraser. "Modelling of equatorial wave motions in the middle atmosphere". Thesis, University of Oxford, 1998. http://ora.ox.ac.uk/objects/uuid:9ae75869-a15b-465e-af64-c608cca8b34c.
Pełny tekst źródłaBurton, Kenneth R. "Influence of Antarctic oscillation on intraseasonal variability of large-scale circulations over the Western North Pacific /". Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2005. http://library.nps.navy.mil/uhtbin/hyperion/05Mar%5FBurton.pdf.
Pełny tekst źródłaFan, Meizhu. "Low frequency North Atlantic SST variability weather noise forcing and coupled response /". Fairfax, VA : George Mason University, 2008. http://hdl.handle.net/1920/3421.
Pełny tekst źródłaVita: p. 190. Thesis director: Edwin K. Schneider. Submitted in partial fulfillment of the requirements for the degree of Doctor of Philosophy in Climate Dynamics. Title from PDF t.p. (viewed Mar. 9, 2009). Includes bibliographical references (p. 181-189). Also issued in print.
Larson, Kristin Ann. "Tropical climate sensitivities : clouds, water vapor, radiation and large-scale circulation /". Thesis, Connect to this title online; UW restricted, 2002. http://hdl.handle.net/1773/10015.
Pełny tekst źródłaLorenz, David Joseph. "Wave-mean-flow interaction and the annular mode /". Thesis, Connect to this title online; UW restricted, 2003. http://hdl.handle.net/1773/10036.
Pełny tekst źródłaBrissaud, Quentin. "Modélisation numérique des ondes atmosphériques issues des couplages solide/océan/atmosphère et applications". Thesis, Toulouse, ISAE, 2017. http://www.theses.fr/2017ESAE0016/document.
Pełny tekst źródłaThis thesis deals with the wave propagation problem within the Earth-ocean-atmosphere coupled system. A good understanding of the these phenomena has a major importance for seismic and atmospheric explosion studies, especially for planetary missions. Atmospheric wave-forms generated by explosions or surface oscillations can bring valuable information about the source mechanism or the properties of the various propagation media. We develop two new numerical full-wave high-order modeling tools to model the propagation of acoustic and gravity waves in realistic atmospheres. The first one relies on a high-order staggered finite difference method and focus only on the atmosphere. It enables the simultaneous propagation of linear acoustic and gravity waves in stratified viscous and windy atmosphere. This method is validated against quasi-analytical solutions based on the dispersion equations for a stratified atmosphere. It has also been employed to investigate two cases : the atmospheric propagation generated by a meteor impact on Mars for the INSIGHT NASA mission and for the study of tsunami-induced acoutic and gravity waves following the 2004 Sumatra tsunami. The second numerical method resolves the non-linear acoustic and gravity wave propagation in a realistic atmosphere coupled, with topography, to the elastic wave propagation in a visco-elastic solid. This numerical tool relies on a discontinuous Galerkin method to solve the full Navier-Stokes equations in the fluid domain and a continuous Galerkin method to solve the elastodynamics equations in the solid domain. It is validated against analytical solutions and numerical results provided by the finite-difference method
Gräfener, G. "Clumping in hydrodynamic atmosphere models". Universität Potsdam, 2007. http://opus.kobv.de/ubp/volltexte/2008/1792/.
Pełny tekst źródłaGliah, Omemah Rajab. "Water extraction from the atmosphere". Thesis, University of Ottawa (Canada), 2008. http://hdl.handle.net/10393/27587.
Pełny tekst źródłaTahtali, Murat Information Technology & Electrical Engineering Australian Defence Force Academy UNSW. "Imaging techniques through the atmosphere". Awarded by:University of New South Wales - Australian Defence Force Academy, 2008. http://handle.unsw.edu.au/1959.4/38963.
Pełny tekst źródłaSeo, Hyodae. "Mesoscale coupled ocean-atmosphere interaction". Diss., Connect to a 24 p. preview or request complete full text in PDF format. Access restricted to UC campuses, 2007. http://wwwlib.umi.com/cr/ucsd/fullcit?p3263355.
Pełny tekst źródłaTitle from first page of PDF file (viewed July 10, 2007). Available via ProQuest Digital Dissertations. Vita. Includes bibliographical references (p. 138-152).
Mandehgar, Mahboubeh. "THz propagation in the Atmosphere". Thesis, Linnéuniversitetet, Institutionen för fysik och elektroteknik (IFE), 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-25561.
Pełny tekst źródłaWang, Yonghua. "CFC1₃ transport in the atmosphere". Diss., Georgia Institute of Technology, 1995. http://hdl.handle.net/1853/25974.
Pełny tekst źródłaJones, Hazel. "Ice processes in the atmosphere". Thesis, University of Manchester, 2008. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.489509.
Pełny tekst źródłaBurns, A. G. "Waves in the middle atmosphere". Thesis, University of Canterbury. Physics, 1985. http://hdl.handle.net/10092/8055.
Pełny tekst źródłaVirgili, Llop Josep. "Spacecraft Flight in the Atmosphere". Thesis, Cranfield University, 2014. http://dspace.lib.cranfield.ac.uk/handle/1826/9255.
Pełny tekst źródłaTuthill, Peter George. "Imaging stars through the atmosphere". Thesis, University of Cambridge, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.337414.
Pełny tekst źródłaSchneider, Nicholas McCord. "Sodium in Io's extended atmosphere". Diss., The University of Arizona, 1988. http://hdl.handle.net/10150/184408.
Pełny tekst źródłaBallok, Brian. "Atmosphere in the City Neighborhood". University of Cincinnati / OhioLINK, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1337101018.
Pełny tekst źródłaKlein, Ann. "Microbial Biodiversity of the Atmosphere". Thesis, University of Oregon, 2016. http://hdl.handle.net/1794/19676.
Pełny tekst źródłaMerzlyakov, E. G., i Christoph Jacobi. "Some numerical results on the quasi-two-day wave excitation and propagation in the unstable summer middle atmosphere". Universitätsbibliothek Leipzig, 2017. http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-217777.
Pełny tekst źródłaBasing on numerical calculations we have demonstrated that some changing of the climatological background atmosphere could lead to an unstable mean zonal wind distribution in the summer middle atmosphere. This instability forces oscillations propagating westward with a period of about 2 days and zonal wavenumbers s = 3 and/or 4. There are variations in the mean zonal wind distribution due to the excitation and transient propagation of these waves and numerical results correspond to features of these changes obtained in experimental studies. Strong 2-day waves in turn are unstable and can generate secondary waves with longer periods and lower zonal wavenumbers. This effect is significant only for very strong 2-day waves. It is shown that the 2-day wave with s=3 forced by non-linear interaction between 10-14 day planetary waves and the 2-day wave of zonal wave number 4 is unstable. This wave generates secondary waves of lower zonal wavenumbers more easily than the primary 2-day waves and these secondary waves may be observed
Hinneburg, Detlef, i Nicole Mölders. "A mesoscale atmospheric model combining meteorology, chemistry, biology, and heterogeneity". Universitätsbibliothek Leipzig, 2016. http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-213743.
Pełny tekst źródłaEin mesoskaliges nicht-hydrostatisches Atmosphärenmodell ist um ein Chemie-TransportModul (CTM) zur Berücksichtigung der Triaden-Komponenten NO, N02 und 03 sowie um ein Verfahren zur verfeinerten Auflösung der topographischen Unterlage (explicit surface-subgrid modul ESSM) erweitert worden. CTM: Die simulierten zeitabhängigen Konzentrationsfelder sind das Resultat folgender modellierter Prozesse: Anthropogene Emission in verschiedenen Höhenschichten, biogene Emission, trockene Deposition (Rezeption), die speziellen chemischen Umwandlungen, turbulente Diffusion und passiver Transport. Da der Schwerpunkt der Prozesse und die höchsten Konzentrationsgradienten innerhalb der bodennahen ersten Modellschicht vorliegen, werden die Berechnungen in dieser Schicht auf einem verfeinerten vertikalen Untergitter durchgeführt. ESSM: Unabhängig von den Eigenheiten des CTM wird für alle untergrundbezogenen meteorologischen Größen ein regelmäßiges horizontales Untergitter zwecks Berücksichtigung des subskalig aufgelösten topographischen Untergrundes eingeführt. Auf diesem Untergitter werden in den bisherigen Näherungen alle Oberflächenflüsse für Impuls, fühlbare und latente Wärme, langwellige Strahlung, der Bodenwärmefluß, die Bodenfeuchte sowie die Energiebilanz am Boden berechnet. Die über die Untergitterzellen gemittelten Werte dienen den weiteren Berechnungen im normalen Modellgitter als die erforderlichen Randwerte. Innerhalb des CTM führt die ESSM-Methode zu einer Überlagerung des vertikalen CTM-Untergitters mit dem horizontalen Untergitter des ESSM. Erste Simulationsergebnisse, die dem derzeitigen Stand in der Realisierung des ESSM entsprechen, erbringen teilweise stark veränderte Depositionsraten infolge der Berücksichtigung der horizontal feiner aufgelösten Topographie
Kochanski, Adam. "On the practical applications of atmosphere-ocean and atmosphere-wave coupling in mesoscale numerical modeling". abstract and full text PDF (UNR users only), 2008. http://0-gateway.proquest.com.innopac.library.unr.edu/openurl?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&res_dat=xri:pqdiss&rft_dat=xri:pqdiss:3316369.
Pełny tekst źródłaArzoumanian, Emmanuel. "Développement du projet SETUP (Simulations Expérimentale et Théorique Utiles à la planétologie) : application à l'étude de la physico-chimie de l'atmosphère de Titan". Phd thesis, Université Paris-Est, 2010. http://tel.archives-ouvertes.fr/tel-00582890.
Pełny tekst źródłaGoel, Anubha. "Contaminants in the atmosphere of the Delmarva Peninsula impact of local activities and atmospheric transport /". College Park, Md. : University of Maryland, 2007. http://hdl.handle.net/1903/6730.
Pełny tekst źródłaThesis research directed by: Civil Engineering. Title from t.p. of PDF. Includes bibliographical references. Published by UMI Dissertation Services, Ann Arbor, Mich. Also available in paper.
Becker, Edo. "FTIR-Emissionsspektroskopische Untersuchungen der arktischen Atmosphäre = Investigations of the arctic atmosphere by FTIR-Emission spectroscopy /". Bremerhaven : Alfred-Wegener-Inst. für Polar- und Meeresforschung, 1998. http://www.gbv.de/dms/bs/toc/247022616.pdf.
Pełny tekst źródłaLilienthal, Friederike, Nadja Samtleben, Christoph Jacobi i Erdal Yigit. "Implementing a Whole Atmosphere Gravity Wave Parameterization in the Middle and Upper Atmosphere Model: Preliminary Results". Universität Leipzig, 2019. https://ul.qucosa.de/id/qucosa%3A74178.
Pełny tekst źródłaDas Modell für die mittlere und obere Atmosphäre (MUAM) wird für die Implementierung einer neuen Schwerewellenparametrisierung, die für die gesamte Atmosphäre geeignet ist, verwendet (Yigit et al., 2008). Um die Klimatologie des Modells basierend auf der neuen Parametrisierung an Beobachtungen anzupassen, werden zwei verschiedene Spektren für die Phasengeschwindigkeiten von Schwerewellen und deren Impulsflüsse verglichen. Das erste Spektrum, als Spectrum1 bezeichnet, das einen schmaleren Bereich von Phasengeschwindigkeiten abdeckt, geht bis zu ±80 m s−1 und das zweite, Spectrum2, geht bis zu ±95 m s−1. Wir analysieren die Beschleunigung des mittleren Zonalwindes durch brechende Schwerewellen und die daraus resultierende Hintergrundzirkulation. Wir untersuchen ebenfalls die Zonalwindamplituden der ganztägigen und halbtätigen migrierenden solaren Gezeiten. Das Ergebnis dieses Experiments zeigt, dass beide Phasengeschwindigkeitsspektren ihre Vor- sowie Nachteile haben. Beispielsweise reproduziert Spectrum1 die Umkehr des Zonalwindes in der Mesosphäre korrekt, jedoch führt es nicht zu einer umgekehrten zonalen Beschleunigung durch Schwerewellen in der Thermosphäre. Während die Amplituden der ganztägigen Gezeit bezüglich Spectrum1 wesentlich realistischer zu sein scheinen, sind jene der halbtägigen Gezeit bezüglich Spectrum2 repräsentativer. Insgesamt ist die neue Parameterisierung eine erhebliche Verbesserung des MUAM Modells.
Gentaz, Lucile. "Simulation et modélisation de l’altération des verres de composition médiévale dans l’atmosphère urbaine". Thesis, Paris Est, 2011. http://www.theses.fr/2011PEST1081.
Pełny tekst źródłaIn a polluted urban environment, alterations affecting heritage glasses depend on intrinsic and extrinsic factors as well as time. In order to characterize the atmospheric alteration resulting from the interactions occurring between these factors, a research strategy has been set up, taking into account the multi-phase environment, the material (composition and surface) and time. In order to do so, a complementary study was conducted on stained glasses displaying several hundred years of alterations and model-glasses exposed in-situ for a few years or artificially altered in the lab. A multi-instrument and multi-scale approach was used in this study. It allowed the identification of the mechanisms responsible for the evolution of the leached layer (LL), especially the presence of concentric 10nm thick laminae (probable traces of alteration front). The exploration of the run-off impact on alteration shows a dependency of LL thickness on both diffusion type kinetics (√t) and dissolution kinetics. Finally, the indirect impact of neoformed alteration products seems to take a major part both in run-off conditions, CaCO3 hastens the scaling, and in sheltered conditions, where K2CO3 can be cause for glass network dissolution
Cao, Jing. "An investigation of transport during minor stratospheric warmings in the Southern Hemisphere". Diss., Georgia Institute of Technology, 1995. http://hdl.handle.net/1853/25964.
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