Morphology And Dynamics Of The Venus Atmosphere At The Cloud Top Level As Observed By The Venus Monitoring Camera
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Morphology And Dynamics Of The Venus Atmosphere At The Cloud Top Level As Observed By The Venus Monitoring Camera
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Author : Richard Moissl
language : en
Publisher:
Release Date : 2008
Morphology And Dynamics Of The Venus Atmosphere At The Cloud Top Level As Observed By The Venus Monitoring Camera written by Richard Moissl and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2008 with categories.
Characterization Of The Dynamics Of The Atmosphere Of Venus With Doppler Velocimetry
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Author : Pedro Miguel Borges do Canto Mota Machado
language : en
Publisher:
Release Date : 2013
Characterization Of The Dynamics Of The Atmosphere Of Venus With Doppler Velocimetry written by Pedro Miguel Borges do Canto Mota Machado and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013 with categories.
The main purpose of this thesis is to contribute to a better understanding of the dynamics of the Venusian atmosphere, constraining its characterization at cloud top level, complementing the observations of the Venus Express spacecraft with ground-based observations. In order to achieve this objective of studying the atmospheric super-rotation, I measured the zonal wind velocity (crosswind the planet from East to West) and its spatial and temporal variability, by means of high precision spectroscopy and Doppler velocimetry. The observations were made with the high-resolution spectrograph UVES with ESO's Very Large Telescope (VLT) and with the high-resolution ESPaDOnS spectropolarimeter at the Canada-France-Hawaii telescope (CFHT) at Mauna Kea observatory. I use a method of direct measurement of the planetary winds based on high resolution spectroscopy in the visible range. The atmosphere of Venus contains highly scattering aerosols in suspension, mostly at cloud top layer. This cloud deck covers entirely the planet, imposing an unusually high albedo. These particles are carried by the wind, carrying with them the information on atmospheric dynamics. The upper cloud layer is located about 70 km altitude. This altitude corresponds to the maximum velocity of zonal superrotation. The method used, in the case of long-slit observations obtained with VLT/UVES, allowed to characterize the spatial variations of zonal wind as a function of latitude (since the slit is thin compared to the size of the disk image of Venus), and a comparison with VEx/VIRTIS cloud tracking was also performed using CFHT/ESPaDOnS.
Models Of Venus Atmosphere 1968
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Author : Robert A. Schiffer
language : en
Publisher:
Release Date : 1968
Models Of Venus Atmosphere 1968 written by Robert A. Schiffer and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1968 with Venus (Planet) categories.
Characterization Of Venusian Atmospheric Dynamics Using Venus Express Images And Ground Based Observations
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Author : Jacob L. Gunnarson
language : en
Publisher:
Release Date : 2017
Characterization Of Venusian Atmospheric Dynamics Using Venus Express Images And Ground Based Observations written by Jacob L. Gunnarson and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2017 with Venus (Planet) categories.
The equatorial atmosphere of Venus rotates 60 times faster than the solid planet, a poorly understood phenomenon known as superrotation. Kelvin-like waves have been hypothesized to maintain the superrotation against dissipation, and the planet- scale “Y-feature”, a transient cloud feature, is likely their visible manifestation. In order to detect these waves, the spatial and temporal evolution of Venus’ atmosphere as a whole must be better characterized on long time scales. Using data from the Venus Monitoring Camera on board Venus Express, we have found yearly average zonal wind profiles by using Correlation Image Velocimetry. In order to better char- acterize the measurement uncertainty and separate it from real variation compared to using the standard deviation, we have developed a method of uncertainty calcula- tion using correlation fields. We observed a consistent trend of increasing zonal wind velocity, about 20 ms−1 over eight years of observation, in the area that the Y-feature is present, which may be caused by Kelvin-like waves accelerating the mean flow. This variation is comparable to the standard deviation and uncertainty, and thus cannot be definitively confirmed. Our new method of uncertainty calculation gave comparable uncertainty to the standard deviation and future work will be needed for improvement in the uncertainty calculation.
Theoretical Model Atmospheres Of Venus
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Author : Robert B. Owen
language : en
Publisher:
Release Date : 1965
Theoretical Model Atmospheres Of Venus written by Robert B. Owen and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1965 with Venus (Planet) categories.
Exploring Venus As A Terrestrial Planet
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Author : Larry W. Esposito
language : en
Publisher: John Wiley & Sons
Release Date : 2013-05-28
Exploring Venus As A Terrestrial Planet written by Larry W. Esposito and has been published by John Wiley & Sons this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013-05-28 with Science categories.
Published by the American Geophysical Union as part of the Geophysical Monograph Series, Volume 176. With the search for extra-solar planets in full gear, it has become essential to gain a more detailed understanding of the evolution of the other earth-like planets in our own solar system. Space missions to Venus, including the Soviet Veneras, Pioneer Venus, and Magellan, provided a wealth of information about this planet' enigmatic surface and atmosphere, but left many fundamental questions about its origin and evolution unanswered. This book discusses how the study of Venus will aid our understanding of terrestrial and extra-solar planet evolution, with particular reference to surface and interior processes, atmospheric circulation, chemistry, and aeronomy. Incorporating results from the recent European Venus Express mission, Exploring Venus as a Terrestrial Planet examines the open questions and relates them to Earth and other terrestrial planets. The goal is to stimulate thinking about those broader issues as the new Venus data arrive.
Towards Understanding The Climate Of Venus
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Author : Lennart Bengtsson
language : en
Publisher: Springer Science & Business Media
Release Date : 2012-12-09
Towards Understanding The Climate Of Venus written by Lennart Bengtsson and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-12-09 with Science categories.
ESA’s Venus Express Mission has monitored Venus since April 2006, and scientists worldwide have used mathematical models to investigate its atmosphere and model its circulation. This book summarizes recent work to explore and understand the climate of the planet through a research program under the auspices of the International Space Science Institute (ISSI) in Bern, Switzerland. Some of the unique elements that are discussed are the anomalies with Venus’ surface temperature (the huge greenhouse effect causes the surface to rise to 460°C, without which would plummet as low as -40°C), its unusual lack of solar radiation (despite being closer to the Sun, Venus receives less solar radiation than Earth due to its dense cloud cover reflecting 76% back) and the juxtaposition of its atmosphere and planetary rotation (wind speeds can climb up to 200 m/s, much faster than Venus’ sidereal day of 243 Earth-days).
The Venus Atmosphere
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Author : American Meteorological Society
language : en
Publisher: M.E. Sharpe
Release Date : 1969
The Venus Atmosphere written by American Meteorological Society and has been published by M.E. Sharpe this book supported file pdf, txt, epub, kindle and other format this book has been release on 1969 with Science categories.
Characteristics Of Variability In The Venus Cloud Level Atmosphere During Spring 1982
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Author : Christopher Grassotti
language : en
Publisher:
Release Date : 1986
Characteristics Of Variability In The Venus Cloud Level Atmosphere During Spring 1982 written by Christopher Grassotti and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1986 with categories.
Spectroscopy And Photochemistry Of Planetary Atmospheres And Ionospheres
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Author : Vladimir A. Krasnopolsky
language : en
Publisher: Cambridge University Press
Release Date : 2019-02-14
Spectroscopy And Photochemistry Of Planetary Atmospheres And Ionospheres written by Vladimir A. Krasnopolsky and has been published by Cambridge University Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2019-02-14 with Science categories.
Reviews the fundamentals for studying chemical compositions of planetary atmospheres and ionospheres, for graduate students and researchers.