Loading...
Please wait, while we are loading the content...
Similar Documents
Jupiter's atmospheric temperatures: from voyager iris to cassini cirs
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Orton, Glenn S. Achterberg, Richard K. Fisher, Brendan Flasar, F. Michael Gierasch, Peter J. Simon-Miller, Amy A. Conrath, Barney J. |
| Copyright Year | 2004 |
| Description | Retrievals run on Cassini Composite Infrared Spectrometer data obtained during the distant Jupiter flyby have been used to generate global temperature maps of the planet in the troposphere and stratosphere. Similar retrievals were performed on Voyager 1 IRIS data and have provided the first detailed IRIS map of the stratosphere. In both data sets, high latitude troposphere temperatures are presented for the first time, and the meridional gradients indicate the presence of circumpolar jets. Thermal winds were calculated for each data set and show strong vertical shears in the zonal winds at low latitudes. The temperatures retrieved from the two spacecraft were also compared with yearly ground-based data obtained over the intervening two decades. Tropospheric temperatures reveal gradual changes at low latitudes, with little obvious seasonal or short-term variation (Orton et al. 1994). Stratospheric temperatures show much more complicated behavior over short timescales, consistent with quasi-quadrennial oscillations at low latitudes, as suggested in prior analyses of shorter intervals of ground- based data (Orton et al. 1991, Friedson 1999). A scaling analysis indicates that meridional motions, mechanically forced by wave or eddy convergence, play an important role in modulating the temperatures and winds in the upper troposphere and stratosphere on seasonal and shorter time scales. At latitudes away from the equator, the mechanical forcing can be derived simply from a temporal record of temperature and its vertical derivative. Ground-based observations with improved vertical resolution and/or long-term monitoring from spacecraft are required for this purpose. |
| File Size | 4548247 |
| Page Count | 56 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_20040081107 |
| Archival Resource Key | ark:/13960/t9h46pq5p |
| Language | English |
| Publisher Date | 2004-01-01 |
| Access Restriction | Open |
| Subject Keyword | Lunar And Planetary Science And Exploration Cassini Mission Fourier Transformation Voyager Project Jupiter Atmosphere Stratosphere Latitude Iris Satellites Quasi-biennial Oscillation Jupiter Planet Atmospheric Temperature Annual Variations Flyby Missions Infrared Interferometers Polar Regions Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Article |
