Physics
Scientific paper
Dec 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006agufmsa13b0272s&link_type=abstract
American Geophysical Union, Fall Meeting 2006, abstract #SA13B-0272
Physics
0300 Atmospheric Composition And Structure, 0310 Airglow And Aurora, 0328 Exosphere, 0355 Thermosphere: Composition And Chemistry
Scientific paper
We present global maps comparing exospheric temperatures obtained from limb profiles of far ultraviolet airglow, measured by the Global Ultraviolet Imager (GUVI) experiment on the NASA TIMED satellite, with those from the NRLMSISE-00 empirical neutral atmosphere model. GUVI measures the O~I 135.6~nm and N2 LBH band emissions as it scans across the disk and up onto the limb of the Earth. The limb measurements create an altitude profile of these emissions that can be analyzed using discrete inverse theory to retrieve concentration of daytime O, N2, O2, and temperature. The information on exospheric temperature comes primarily from the scale height of the airglow altitude profiles and can be retrieved with statistical uncertainties of less than 5%. We have taken GUVI measurements from 2002-2005 and arbitrarily divided them into successive 50 day spans, averaging the data in each span to expose seasonal differences between the data and the model. Each map was thus created from a set of approximately 10,000 individual measurements. Our results show that temperatures obtained from the GUVI data are on the order of 15% higher than NRLMSISE-00 in regions poleward of 30 degrees latitude during solstice months in the corresponding summer hemisphere, with closer agreement in the opposing winter hemisphere. There is closer agreement in both hemispheres during the equinox months, with any differences uniformly spread throughout both hemispheres. This pattern is present in each of the years, and may indicate a seasonal deficiency in modeled exospheric temperatures at middle and high latitudes.
Christensen Andrew B.
Meier Robert R.
Paxton Larry J.
Stephan Andrew Ward
No associations
LandOfFree
Seasonal patterns in exospheric temperature: TIMED/GUVI versus NRLMSIS does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Seasonal patterns in exospheric temperature: TIMED/GUVI versus NRLMSIS, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Seasonal patterns in exospheric temperature: TIMED/GUVI versus NRLMSIS will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-964575