𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Radiative damping of trapped gravity waves in the solar atmosphere

✍ Scribed by Patricia André Clark; Alfred Clark

Publisher
Springer
Year
1973
Tongue
English
Weight
383 KB
Volume
30
Category
Article
ISSN
0038-0938

No coin nor oath required. For personal study only.

✦ Synopsis

The radiative damping of trapped gravity waves in an optically thin atmosphere is studied for a stratified Boussinesq fluid. The character of the atmospheric eigenmodes depends on the distribution of the Brunt-V~iis~il/i frequency N and the radiative relaxation time r. The calculations for simple layer models show that if Nr is large over some finite fraction of the trapping region, then modes of long lifetime can exist. In order to suppress gravity waves entirely, it is necessary that Nr ~< 1 over the entire trapping region. Qualitative application of the results to the solar atmosphere leads to the conclusion that gravity wave eigenmodes of the solar atmosphere, although damped, are by no means eliminated by radiative effects.

📜 SIMILAR VOLUMES

Hydromagnetic-gravity wave critical leve
Hydromagnetic-gravity wave critical levels in the solar atmosphere
✍ O. Mekki; I. A. Eltayeb; J. F. McKenzie 📂 Article 📅 1978 🏛 Springer 🌐 English ⚖ 253 KB

It is shown that the discontinuous jump in the vertical wave energy flux of slow hydromagnetic-gravity waves, occurring at a critical level, which is accompanied by wave absorption, and the existence of a reflection point imply that slow waves are trapped in the solar atmosphere. Thus such a system

On frequency and strength of shock waves
On frequency and strength of shock waves in the solar atmosphere
✍ Peter Ulmschneider 📂 Article 📅 1970 🏛 Springer 🌐 English ⚖ 554 KB

Comparison of computed radiative energy losses of several new empirical chromospheric models with heating by shock wave dissipation gives information on the frequency and strength of shock waves in the solar chromosphere. A mechanical flux of around 2.5 • 10 ~ erg/cm e sec is found for the base of t