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Tesi sul tema "Mesosphere"

Autore: Grafiati

Pubblicato: 4 giugno 2021

Ultima modifica: 30 novembre 2024

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1

MacLeod, R. I. "Dynamics of the Antarctic mesosphere /." Title page, contents and summary only, 1986. http://web4.library.adelaide.edu.au/theses/09PH/09phm1658.pdf.

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2

Lange, Martin, and Christoph Jacobi. "Einfluß des winterlichen stratosphärischen Polarwirbels auf die zonale Symmetrie des Windfeldes in der oberen Mesosphäre und unteren Thermosphäre simuliert mit dem COMMA-Modell." Universitätsbibliothek Leipzig, 2017. http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-216894.

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Langzeitmessungen des Windfeldes in der Mesopausenregion (~ 92km) an verschiedenen Stationen in den mittleren Breiten der Nordhemisphäre zeigen systematische zonale Variationen beim (zeitlich) gemittelten Zonal- und Meridionalwind und bei den Amplituden und Phasen der halbtägigen Gezeiten. Als eines der herausragenden Muster, die zonale Variationen in der unteren mittleren Atmosphäre anregen, wird der Einfluß der Geopotentialstörungen zur zonalen Wellenzahl 1 und 2, die mit dem winterlichen stratosphärischen Polarwirbel verbunden sind, auf das Windfeld in der oberen Mesosphäre / unteren Thermo

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3

Jacobi, Christoph, and Peter Braesicke. "Correlation between stratosphere and upper mesosphere." Universitätsbibliothek Leipzig, 2016. http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-214575.

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Collm mesopause winds are analysed with respect to their correlation with 30 hPa northern hemispheric stratospheric winds and pressure level heights. Correlation maps, based on the period of December 1978 through November 1997, are presented for each month of the year, showing possible connections between the lower and upper middle atmosphere, partly owing to the 10-12-year oscillation (TTO). Although in winter due to the propagation of planetary waves into the mesosphere direct coupling between the different layers of the atmosphere especially during stratospheric warmings is possible, the st

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4

Jacobi, Christoph, Nadja Samtleben, and Gunter Stober. "Meteor radar observations of mesopause region long-period temperature oscillations." Universitätsbibliothek Leipzig, 2016. http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-212263.

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Meteor radar observations of mesosphere/lower thermosphere (MLT) daily temperatures have been performed at Collm, Germany since August 2004. The data have been analyzed with respect to long-period oscillations at time scales of 2–30 days. The results reveal that oscillations with periods of up to 6 days are more frequently observed during summer, while those with longer periods have larger amplitudes during winter. The oscillations may be considered as the signature of planetary waves. The results are compared with analyses from radar wind measurements. Moreover, the temperature oscillations s

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5

Moss, Andrew. "Wave dynamics of the stratosphere and mesosphere." Thesis, University of Bath, 2017. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.707571.

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Gravity waves play a fundamental role in driving the large-scale circulation of the atmosphere. They are influenced both by the variation in their sources and the filtering effects of the winds they encounter as they ascend through the atmosphere. In this thesis we present new evidence that gravity waves play a key role in coupling the troposphere, stratosphere and mesosphere. In particular, we examine the connection of gravity waves to two important large-scale oscillations that occur in the atmosphere, namely the Madden-Julian Oscillation (MJO) in the troposphere and the Mesospheric Semi-Ann

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6

Beldon, Charlotte. "VHF radar studies of mesosphere and thermosphere." Thesis, University of Bath, 2008. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.512294.

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7

Sandford, David J. "Dynamics of the stratosphere, mesosphere and thermosphere." Thesis, University of Bath, 2008. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.512300.

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This thesis presents observations of the dynamical features of the stratosphere, mesosphere and lower thermosphere. These are made from various observational techniques and model comparisons. A focus of the work is the two-day wave at high latitudes in the MLT region. This has revealed significant wave amplitudes in both summer and winter. However, these waves are shown to have very different origins. Using satellite data, the summertime wave is found to be the classic quasi-two-day wave which maximises at mid-latitudes in the MLT region. The wintertime wave is found to be a mesospheric manife

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8

Holt, Gavin. "Planetary waves in the stratosphere and mesosphere." Thesis, University of Oxford, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.318787.

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9

Greet, P. A. "Observations on the sodium airglow /." Title page, contents and abstract only, 1988. http://web4.library.adelaide.edu.au/theses/09PH/09phg8166.pdf.

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10

Phillips, A. "Dynamics of the Antarctic mesosphere and lower thermosphere /." Title page, contents and abstract only, 1989. http://web4.library.adelaide.edu.au/theses/09PH/09php5583.pdf.

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Thesis (Ph. D.)--University of Adelaide, Mawson Institute for Antarctic Research, 1990.<br>Copies of author's previously published articles inserted. Includes bibliographical references (leaves 219-226).

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11

Murphy, D. J. "Measurements of energy and momentum in the mesosphere /." Title page, table of contents and abstract only, 1990. http://web4.library.adelaide.edu.au/theses/09PH/09phm9772.pdf.

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12

Tingle, Susannah. "The dynamics of the Venusian mesosphere and thermosphere." Thesis, Imperial College London, 2011. http://hdl.handle.net/10044/1/9060.

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We present the first circulation model of Venus' atmosphere to couple the super-rotating cloud tops and upper thermosphere. To drive these simulations, we formulate the first continuous semi-empirical model of atmospheric structure between 60-250 km. Our model hydrostatically links the VIRA and VTS3 models. Our approach is validated by comparisons with observations where we find a good agreement with data. We base our dynamic model on the Müller-Wodarg et al. [2003] general circulation model (GCM) of Titan's thermosphere. Our simulations solve the full non-linear Navier-Stokes momentum equatio

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13

Yamamoto, Mamoru. "Radar observations of gravity waves in the mesosphere." Kyoto University, 1987. http://hdl.handle.net/2433/74712.

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14

Woithe, Jonathan Mark. "Optical studies of the mesospheric region." Title page, contents and abstract only, 2000. http://web4.library.adelaide.edu.au/theses/09PH/09phw847.pdf.

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Includes copies of articles co-authored by the author during the preparation of this thesis. Includes bibliographical references (leaves 233-245). A three-field photometer was employed at the University of Adelaide's Buckland Park field site to collect optical observations of the 557.7nm OI and 730nm OH airglow emissions on an almost continuous basis since May 1995 to May 2000, with observations made whenever the moon was not up.

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15

Krug, Amelie, Friederike Lilienthal, and Christoph Jacobi. "The terdiurnal tide in the MUAM circulation model." Universität Leipzig, 2015. https://ul.qucosa.de/id/qucosa%3A16650.

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The terdiurnal tide (TDT) in the mesosphere and lower thermosphere has been simulated with a 3D mechanistic circulation model of the middle atmosphere. The tidal temperature amplitude shows a clear seasonal cycle with peaks in the midlatitudes and near the equator at equinox. Under solstice conditions maximum amplitudes occur at 10° in the summer hemisphere and at 30-40° latitude in the winter hemisphere. The vertical wavelengths are large at midlatitudes and small at the equator with about 15 km. These characteristics are compared with SABER/TIMED satellite data from 2002-2009. Especially for

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16

Jacobi, Christoph. "Possible signal of tropospheric circulation patterns in middle atmosphere dynamics, Collm (51.3°N, 13°E) mesosphere lower thermosphere winds: 1979 - 2008." Universität Leipzig, 2009. https://ul.qucosa.de/id/qucosa%3A16368.

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Time series of monthly mean Collm mesosphere/lower thermosphere winds 1979 - 2008 are analyses with respect to a possible correlation with North Atlantic Oscillation (NAO) and Southern Oscillation (SO) indices. There is a positive correlation with both indices until the middle 1990s, but later the correlation decreases or even reverses. Owing to the coupling of the SO with the NAO the change of correlation occurs broadly at the same time. The change of correlation is probably connected with changes of the middle atmosphere mean dynamics.<br>Zeitreihen von Monatsmittelwerten des Windes in der M

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17

Barabash, Victoria. "Investigation of Polar Mesosphere Summer Echoes in Northern Scandinavia." Doctoral thesis, Umeå University, Physics, 2003. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-176.

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<p>This PhD thesis deals with phenomena which are closely related to the unique thermal structure of the polar summer mesosphere, namely Polar Mesosphere Summer Echoes (PMSE). PMSE are strong radar echoes commonly observed by VHF MST radars from thin layers in the 80-90 km altitude interval at high latitudes during summer. They follow a seasonal pattern of abrupt appearance in late May and a gradual disappearance in mid-August. This period corresponds roughly to the time between the completion of the summer time cooling of the polar mesopause to the time of reversal of the mesospheric circulat

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18

Barabash, Victoria. "Investigation of polar mesosphere summer echoes in northern Scandinavia /." Kiruna : Swedish Institute of Space Physics (Institutet för rymdfysik), 2004. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-176.

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19

Frame, David J. "Wind measurement and momentum balance in the southern mesosphere." Thesis, University of Canterbury. Physics, 1998. http://hdl.handle.net/10092/5938.

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This thesis makes use of diverse data sets in order to develop an understanding of the dynamics of the upper mesosphere in the region near Birdlings Flat, New Zealand. Medium frequency radar data from the Birdlings Flat site were obtained for the period between May 1993 and December 1996. When analysed, the data reveal two distinct annually varying patterns of circulation, one of which corresponds to seasonal behaviour characteristic of the upper mesospheric, while the other is part of the lower thermospheric climatology. Time-series of wind data in the upper mesosphere also reveal the presen

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20

Nakamura, Takuji. "Mesosphere and Lower Thermosphere Dynamics Revealed by Radar Observations." Kyoto University, 1991. http://hdl.handle.net/2433/74598.

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21

Chu, Ding-Chong Allen. "The interpretation of SAGE II ozone measurements in the lower mesosphere." Diss., Georgia Institute of Technology, 1989. http://hdl.handle.net/1853/26221.

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22

Jacobi, Christoph, and Manfred Ern. "Gravity waves and vertical shear of zonal wind in the summer mesosphere-lower thermosphere." Universität Leipzig, 2013. https://ul.qucosa.de/id/qucosa%3A16408.

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Gravity wave amplitudes and momentum fluxes derived from SABER temperature measurements are analysed together with Collm meteor radar zonal winds. The momentum flux (MF) divergence derived from the SABER temperatures shows a maximum that is found at greater altitudes during solar minimum than during solar maximum. Therefore, the zonal mean wind and wind shear profiles are shifted upwards then, leading to a modulation of the otherwise negative correlation between solar cycle and mesosphere/lower thermosphere winds.<br>Amplituden von Schwerewellen und zugehörigen Impulsflüsse werden zusammen mit

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23

Hultgren, Kristoffer. "Tomographic views of the middle atmosphere from a satellite platform." Doctoral thesis, Stockholms universitet, Meteorologiska institutionen (MISU), 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-106833.

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The middle atmosphere is a very important part of the Earth system. Until recently, we did not realize the importance of the structure of this vaporous shell and of the fundamental role it plays in both creating and sustaining life on the planet. Thanks to the development and improvement of new sounding methods and techniques, our knowledge of the composition of the atmosphere has become more detailed than ever before. We have also learned how to reveal complex interactions between different species and how they react to the incoming solar radiation. The middle part of the Earth’s atmosphere s

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24

Harris, Trevor. "Large-scale dynamics of the upper mesosphere and lower thermosphere /." Title page, contents and abstract only, 1993. http://web4.library.adelaide.edu.au/theses/09PH/09phh3165.pdf.

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25

Tjelle, Erlend Magnus. "Mesoscale gravity wave activity in the Mesosphere over Northern-Norway." Thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for fysikk, 2014. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-26135.

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The purpose of this study is to examine wind data retrieved from the SKiYMET-radarsat Trondheim and Andenes during the time period of the 27th of November to the 02ndof December 2012. These dates surrounds the night between the 29th-30th of November,were Hennum (2013) discovered large scale fluctuations in the hydroxyl layer dueto gravity wave activity over Trondheim. Similar fluctuations where found over Andenes(although not mentioned in Hennum's thesis), providing for the possibility of a mesoscale connected gravity wave system with wavefronts stretching over 700 km in the middle atmosp

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26

Fan, Zeyu. "Satellite retrievals of the global sodium layer in the mesosphere." Thesis, University of East Anglia, 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.433788.

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27

Day, Kerry. "Planetary wave dynamics of the stratosphere, mesosphere and lower thermosphere." Thesis, University of Bath, 2011. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.547637.

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28

Lange, Martin, and Christoph Jacobi. "Einfluß des winterlichen stratosphärischen Polarwirbels auf die zonale Symmetrie des Windfeldes in der oberen Mesosphäre und unteren Thermosphäre simuliert mit dem COMMA-Modell: Einfluß des winterlichen stratosphärischen Polarwirbels auf die zonale Symmetrie des Windfeldes in der oberen Mesosphäre und unteren Thermosphäresimuliert mit dem COMMA-Modell." Wissenschaftliche Mitteilungen des Leipziger Instituts für Meteorologie ; 22 = Meteorologische Arbeiten aus Leipzig ; 6 (2001), S. 111-120, 2001. https://ul.qucosa.de/id/qucosa%3A15212.

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Langzeitmessungen des Windfeldes in der Mesopausenregion (~ 92km) an verschiedenen Stationen in den mittleren Breiten der Nordhemisphäre zeigen systematische zonale Variationen beim (zeitlich) gemittelten Zonal- und Meridionalwind und bei den Amplituden und Phasen der halbtägigen Gezeiten. Als eines der herausragenden Muster, die zonale Variationen in der unteren mittleren Atmosphäre anregen, wird der Einfluß der Geopotentialstörungen zur zonalen Wellenzahl 1 und 2, die mit dem winterlichen stratosphärischen Polarwirbel verbunden sind, auf das Windfeld in der oberen Mesosphäre / unteren Thermo

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29

Allgood, Michael David Baginski Michael E. "Finite element analysis of the mesosphere's electromagnetic response to large scale lightning associated with sprites and other transient luminous events." Auburn, Ala, 2008. http://repo.lib.auburn.edu/EtdRoot/2008/SPRING/Electrical_and_Computer_Engineering/Thesis/Allgood_Michael_37.pdf.

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30

Cox, Rachel Mary. "On the origin of sporadic neutral sodium layers." Thesis, University of East Anglia, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.365136.

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31

Smith, Steven Michael. "Optical and radar wind comparisons in the mesosphere and lower thermosphere." Thesis, University of Canterbury. Physics, 1996. http://hdl.handle.net/10092/8159.

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This project involved the comparison of horizontal winds in the upper mesosphere at 80-105 km which were obtained by two different ground-based techniques located in Canterbury. Optical Doppler winds were derived from night time observations of the mesospheric 557.7 nm airglow emission near 95 km (FWHM intensity ∼10-12 km) using a Fabry-Perot Spectrometer (FPS) during the period February 1991 to July 1994. These were compared to simultaneous radar winds obtained using a partial-reflection MF (2.4 MHz) wind-profiling radar. The comparisons were made on 103 nights considered suitable by exhibiti

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32

Tunbridge, Victoria. "2-day planetary waves in the stratosphere, mesosphere and lower thermosphere." Thesis, University of Bath, 2011. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.538116.

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This thesis presents observations of the 2-day planetary wave in the stratosphere, mesosphere and lower thermosphere. These observations were made using two ground-based meteor radars at polar latitudes and the satellite-borne microwave limb sounder (MLS) on the NASA Aura satellite. There have been relatively few observations of the 2-day wave at polar latitudes made using ground-based radars. This is particularly so in the Antarctic. Measurements of summertime and wintertime polar 2-day waves in the mesosphere and lower thermosphere (MLT) region were made using identical meteor radars at the

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33

Liu, R. Q., and Ch Jacobi. "Piecewise linear trend detection in mesosphere/lower thermosphere wind time series." Universität Leipzig, 2010. https://ul.qucosa.de/id/qucosa%3A16361.

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A piecewise linear model is developed to detect climatic trends and possible structural changes in time series with a priori unknown number and positions of breakpoints. The initial noise is allowed to be interpreted by the first- and second-order autoregressive models. The goodness of fit of candidate models, if the residuals are accepted as normally distributed white noise, is evaluated using the Schwarz Bayesian Information Criterion. The uncertainties of all modeled trend parameters are estimated using the Monte-Carlo method. The model is applied to the mesosphere/lower thermosphere winds

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34

Younger, Peter Thomas. "Radar studies of the dynamics of the mesosphere and lower thermosphere." Thesis, University of Bath, 2004. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.487553.

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Meteor radars are powerful tools for the study of the atmosphere at heights between -80-100 lan. These heights span the boundary between the mesosphere and the lower thermosphere (MLT) and include the temperature rp.inimum of the mesopause - the coldest naturally occurring place on Earth. This thesis describes studies made using two modem VHF meteor radars. The first was installed at Esrange (68Ã‚Â°N, 21Ã‚Â°E) in Arctic Sweden in October 1999. The second was deployed on Ascension Island (80 S, 14Ã‚Â°W) in the equatorial Atlantic in May 2001. The work is in three parts. The first part is a stud

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35

Schminder, Rudolf. "Die Entwicklung des Arbeitsgebietes Physik der Hochatmosphäre am Geophysikalischen Obsenratorium Collm." Universitätsbibliothek Leipzig, 2016. http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-212298.

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Am Geophysikalischen Observatorium Collm, das 1932 als experimentelle Basis des Geophysikalischen Institutes der Universität Leipzig für meteorologische, seismologische und geomagnetische Messungen von Professor LUDWIG WEICKMANN errichtet worden war, wurde 1956 in Vorbereitung des Internationalen Geophysikalischen Jahres (International Geophysical Year [IGY]) mit hochattnosphärischen Messungen begonnen. Seit 1959 liegt der Schwerpunkt auf Windmessungen im Höhenbereich der oberen Mesosphäre / unteren Thermosphäre (80 - 110 km). Die Meß- und Auswertemethode wurde in den vergangenen Jahrzehnten a

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36

Stevens, M. H., D. E. Siskind, J. S. Evans, S. K. Jain, N. M. Schneider, J. Deighan, A. I. F. Stewart, et al. "Martian mesospheric cloud observations by IUVS on MAVEN: Thermal tides coupled to the upper atmosphere." AMER GEOPHYSICAL UNION, 2017. http://hdl.handle.net/10150/624978.

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We report observations of Martian mesospheric ice clouds and thermospheric scale heights by the Imaging Ultraviolet Spectrograph on NASA's Mars Atmosphere and Volatile Evolution mission. The clouds are observed between 6A.M. and 8A.M. local time using mid-UV limb observations between 60 and 80km tangent altitude where ice particles that scatter sunlight can appear as detached layers near the equator. The equatorial longitudinal distribution shows populations of clouds near -110 degrees E and -10 degrees E as well as a population near 90 degrees E, which does not have a clear precedent. The clo

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37

Igarashi, Kiyoshi. "MF radar studies on the dynamics of the mesosphere and lower thermosphere." 京都大学 (Kyoto University), 2006. http://hdl.handle.net/2433/135950.

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38

Samtleben, Nadja, and Christoph Jacobi. "Long-period oscillations derived from mesosphere/lower thermosphere meteor radar temperature measurements." Universität Leipzig, 2015. https://ul.qucosa.de/id/qucosa%3A16649.

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Using measurements, derived from a meteor radar in Collm (51.3°N, 13°E), the mesopause region is analyzed with respect to the temperature distribution at an altitude of 90 km over a period of 10 years. The analyzed period lasts from 2005 till 2013. Based on these measurements, the typical temperature seasonal cycle of the mesopause region can be observed. The temperature reaches its minimum of about 130 K in summer and its maximum of about 220 K in winter. At this altitude, also strong day-today- fluctuations of up to 35 K exist, which are probably partly induced by planetary waves. Shorter-pe

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39

Jacobi, Christoph, Friederike Liilienthal, T. Schmidt, and la Torre A. de. "Modeling the Southern Hemisphere winter circulation using realistic zonal mean gravity wave information in the lower atmosphere." Universität Leipzig, 2016. https://ul.qucosa.de/id/qucosa%3A16703.

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A mechanistic global circulation model is used to simulate the mesospheric and lower thermospheric circulation during austral winter. The model includes a gravity wave (GW) parameterization that is initiated by prescribed GW parameters in the troposphere. In standard configuration, these waves are described by a simple distribution with large amplitudes in the winter hemisphere and small ones in summer. Here we replace this distribution by a more realistic one, which is based on observations of potential GW energy using GPS radio occultations, but which is normalized to the same global mean am

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40

Smirnova, Maria. "Long-term observations of polar mesosphere summer echoes using the ESRAD MST radar." Doctoral thesis, Luleå tekniska universitet, Rymdteknik, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-18134.

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Polar Mesosphere Summer Echoes (PMSE) are strong radar echoes observed from altitudes of 80-90 km in polar regions, during summer time. PMSE are closely related to the fascinating atmospheric phenomenon known as noctilucent clouds (NLC). Since it has been suspected that NLC could respond to climate change in the mesosphere, they have attracted considerable interest in the scientific community during recent years. However, continuous visual or photographic NLC observations suffer from weather restrictions and the human factor. In contrast, PMSE radar measurements can easily be made over a long

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41

Wilms, Henrike [Verfasser], and Markus [Akademischer Betreuer] Rapp. "Microphysics of ice particles in the polar summer mesosphere / Henrike Wilms ; Betreuer: Markus Rapp." München : Universitätsbibliothek der Ludwig-Maximilians-Universität, 2016. http://d-nb.info/1119073677/34.

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42

Jacobi, Christoph, and Dierk Kürschner. "A possible connection of midlatitude mesosphere/lower thermosphere zonal winds and the Southern oscillation." Universitätsbibliothek Leipzig, 2017. http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-216880.

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Collm (52°N, 15°E) midlatitude mesosphere/lower thermosphere (MLT) zonal winds are investigated with respect to a possible influence of the Southern Oscillation (SO). It is found that in winter the prevailing wind is positively correlated with the Southern Oscillation index (SOI), which qualitatively fits to the response of the low-latitude stratosphere on the SO. In summer, however, there is a negative correlation between MLT zonal winds and SOI. A possible mechanism, which includes slightly enhanced planetary wave propagation to the MLT in summers of low SOI is discussed<br>Windmessungen aus

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43

Jacobi, Christoph, and Dierk Kürschner. "A possible connection of midlatitude mesosphere/lower thermosphere zonal winds and the Southern oscillation." Wissenschaftliche Mitteilungen des Leipziger Instituts für Meteorologie ; 22 = Meteorologische Arbeiten aus Leipzig ; 6 (2001), S. 98-110, 2001. https://ul.qucosa.de/id/qucosa%3A15211.

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Collm (52°N, 15°E) midlatitude mesosphere/lower thermosphere (MLT) zonal winds are investigated with respect to a possible influence of the Southern Oscillation (SO). It is found that in winter the prevailing wind is positively correlated with the Southern Oscillation index (SOI), which qualitatively fits to the response of the low-latitude stratosphere on the SO. In summer, however, there is a negative correlation between MLT zonal winds and SOI. A possible mechanism, which includes slightly enhanced planetary wave propagation to the MLT in summers of low SOI is discussed.<br>Windmessungen au

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44

Bardeen, Charles Gaylord. "Three-dimensional numerical simulations of clouds and aerosols in the mesosphere using WACCM/CARMA." Connect to online resource, 2008. http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&res_dat=xri:pqdiss&rft_dat=xri:pqdiss:3337072.

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45

Cuevas, Brian J. "Synthesis and properties of protein micro/mesosphere-drug compositions designed for intratumoral cancer therapy." [Gainesville, Fla.] : University of Florida, 2003. http://purl.fcla.edu/fcla/etd/UFE0001106.

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46

Narayanan, V. Lakshmi. "Study of dynamical coupling of the mesosphere-lower thermosphere-ionosphere region at low latitudes." Thesis, Indian Institute of Geomagnetism, Mumbai, 2011. http://localhost:8080/xmlui/handle/123456789/223.

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47

Jacobi, Christoph, Peter Hoffmann, and Dierk Kürschner. "Trends and climatic shifts in mesosphere / lower thermosphere planetary waves Collm (52°N, 15°E)." Universität Leipzig, 2007. https://ul.qucosa.de/id/qucosa%3A15567.

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Abstract (sommario):

Long-period oscillations in the period range between 2-30 days, interpreted as planetary wave (PW) signatures, have been analysed using daily upper mesosphere/lower thermosphere wind measurements near 90 km over Collm (52°N, 15°E) in the time interval 1980-2005. Strong interannual and interdecadal variability of PW are found. Since the 1990s, a tendency for larger zonal amplitudes compared to meridional ones, has been observed, thus long-term trends are visible, which are positive in the zonal component, but negative in the meridional component. The change appears in a stepwise manner, so that

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48

Chen, Chen. "Electron Temperature Enhancement Effects on Plasma Irregularities Associated with Charged Dust in the Earth's Mesosphere." Diss., Virginia Tech, 2007. http://hdl.handle.net/10919/25937.

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Abstract (sommario):

Recently, experimental observations have shown that Polar Mesospheric Summer Echoes PMSE may be modulated by radio wave heating the irregularity source region with a ground-based ionospheric heating facilities. It is clear from these past investigations that the temporal behavior of PMSE during ionospheric heating shows promise as a diagnostic for the associated dust layer. To investigate the temporal behavior of plasma irregularities thought to produce PMSE, this work describes a new model that incorporates both finite diffusion time effects as well as dust charging. The hybrid model utilizes

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49

Jacobi, Christoph, Peter Hoffmann, and Dierk Kürschner. "Trends and climatic shifts in mesosphere / lower thermosphere planetary waves Collm (52°N, 15°E)." Universitätsbibliothek Leipzig, 2017. http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-223160.

Testo completo

Abstract (sommario):

Long-period oscillations in the period range between 2-30 days, interpreted as planetary wave (PW) signatures, have been analysed using daily upper mesosphere/lower thermosphere wind measurements near 90 km over Collm (52°N, 15°E) in the time interval 1980-2005. Strong interannual and interdecadal variability of PW are found. Since the 1990s, a tendency for larger zonal amplitudes compared to meridional ones, has been observed, thus long-term trends are visible, which are positive in the zonal component, but negative in the meridional component. The change appears in a stepwise manner, so that

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50

Simmons, Shelton O'Brien. "A study of the mesosphere-lower thermosphere noctilucent cloud observations and rocket borne density measurements /." Connect to this title online, 2009. http://etd.lib.clemson.edu/documents/1263397391/.

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