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5 results on '"Schinder, Paul J."'

1. Images from Galileo of the Venus Cloud Deck

Author

Gierasch, Peter J., Smith, Michael D., Helfenstein, Paul, Schinder, Paul J., Pollack, James B., Rages, Kathy A., Ingersoll, Andrew P., Klaasen, Kenneth P., Veverka, Joseph, Anger, Clifford D., Carr, Michael H., Chapman, Clark R., Davies, Merton E., Fanale, Fraser P., Greeley, Ronald, Greenberg, Richard, Head, James W., Morrison, David, Neukum, Gerhard, and Pilcher, Carl B.

Published
1991

3. Global-scale waves in the Venus atmosphere

Author

Smith, Michael D., Gierasch, Peter J., and Schinder, Paul J.

Subjects
Venus (Planet) -- Atmosphere, Waves -- Research, Earth sciences, Science and technology
Abstract

The nature of global-scale waves that can exist in the atmosphere of Venus is examined. A linear three-dimensional model atmosphere with spherical geometry is used to study large-scale forced and free waves. Solutions are obtained numerically with grid points in the vertical and a spherical harmonic expansion in the horizontal. Observations have shown a global-scale traveling wave with phase speed near the cloud-top wind velocity. Global-scale wave modes are found to exist in the model at this velocity. When a radiative- dynamic cloud feedback is added to the model, the most unstable wave mode is found to have the same phase speed as the observed wave. The horizontal structure of this wave is consistent with the observed horizontal structure of the 'Y' feature seen in ultraviolet images of the Venus cloud top.

Published
1993

4. Images from Galileo of the Venus cloud deck

Author

Belton, Michael J.S., Gierasch, Peter J., Smith, Michael D., Helfenstein, Paul, Schinder, Paul J., Pollack, James B., Rages, Kathy A., Ingersoll, Andrew P., Klaasen, Kenneth P., Veverka, Joseph, Anger, Clifford D., Carr, Michael H., Chapman, Clark R., Davies, Merton E., Fanale, Fraser P., Greeley, Ronald, Greenberg, Richard, Head, III, James W., Morrison, David, Neukum, Gerhard, and Pilcher, Carl B.

Subjects
Galileo (Space probe) -- Observations, Clouds -- Observations, Venus (Planet) -- Observations, Science and technology
Abstract

THE SOLID STATE IMAGING (SSI) camera on Galileo returned 77 useful images from Venus documenting the dynamical state of the cloud tops during the week after the encounter on 10 [...]

Published
1991

5. Waves, advection, and cloud patterns on Venus

Author

Schinder, Paul J, Gierasch, Peter J, Leroy, Stephen S, and Smith, Michael D

Subjects
Lunar And Planetary Exploration
Abstract

The stable layers adjacent to the nearly neutral layer within the Venus clouds are found to be capable of supporting vertically trapped, horizontally propagating waves with horizontal wavelengths of about 10 km and speeds of a few meters per second relative to the mean wind in the neutral layer. These waves may possibly be excited by turbulence within the neutral layer. Here, the properties of the waves, and the patterns which they might produce within the visible clouds if excited near the subsolar point are examined. The patterns can be in agreement with many features in images. The waves are capable of transferring momentum latitudinally to help maintain the general atmospheric spin, but at present we are not able to evaluate wave amplitudes. We also examine an alternative possibility that the cloud patterns are produced by advection and shearing by the mean zonal and meridional flow of blobs formed near the equator. It is concluded that advection and shearing by the mean flow is the most likely explanation for the general pattern of small scale striations.

Published
1990
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