Long-term behavior of the OI 558 nm emission in the night sky and its aeronomical implications

Details Long-term behavior of the OI 558 nm emission in the night sky and its aeronomical implications Long-term behavior of the OI 558 nm emission in the night sky and its aeronomical implications

Dec 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003jgra..108.1430d&link_type=abstract

Journal of Geophysical Research, Volume 108, Issue A12, pp. SIA 4-1, CiteID 1430, DOI 10.1029/2002JA009611

Mathematics

Logic

4

Meteorology And Atmospheric Dynamics: Climatology (1620), Atmospheric Composition And Structure: Airglow And Aurora, Atmospheric Composition And Structure: Middle Atmosphere-Energy Deposition, Global Change: Atmosphere (0315, 0325)

Scientific paper

Study of the long-term behavior of the OI 558 nm emission in the night-sky, using data encompassing observations at low geomagnetic activity from 1923 to present, gives the result that these long-term, noisy, geophysical time series need to include nearly 20 cycles of an oscillation before a stable statistically meaningful answer is achieved. Periodogram analysis reveals that the strongest and predominant statistically significant oscillation in the OI 558 nm emission is a yearly variation. When this yearly oscillation is the main oscillation present in the spectrum, it has a fractional amplitude of value near 0.4. A semiannual oscillation is often also found in addition to the annual oscillation and, when significant annual and semiannual components are present, the fractional amplitudes are typically near 0.3 and 0.2 for the annual and semiannual oscillations, respectively. However, the annual fractional amplitude increases with latitude, while the semiannual fractional amplitude decreases with latitude. These results provide an insight on the nature of the seasonal variation of the OI 558 nm emission. Our longest time series are about 12 years long and thus set the lowest frequency to be studied. It is found that the OI 558 nm emission rate increases with solar activity, but in general, the emission is higher during the decreasing phase of solar activity; the apparent relationship changes with different solar cycles. OI 558 nm emission observations have been used to provide observational constraints to global dynamical atmospheric models. However, those constraining observational series have been of limited length and location and are possibly atypical. In the context of a model constrained by such observations, one can infer differences in the dynamical behavior of the atmosphere with latitude in order to account for the observed climatological emission behavior.

Affiliated with

Also associated with

No associations

Rating

Long-term behavior of the OI 558 nm emission in the night sky and its aeronomical implications 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 Long-term behavior of the OI 558 nm emission in the night sky and its aeronomical implications, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Long-term behavior of the OI 558 nm emission in the night sky and its aeronomical implications will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-882503