Open Access. Powered by Scholars. Published by Universities.®
Physical Sciences and Mathematics Commons™
Open Access. Powered by Scholars. Published by Universities.®
- Publication
Articles 1 - 2 of 2
Full-Text Articles in Physical Sciences and Mathematics
Gravity Wave Propagation Directions Inferred From Satellite Observations Including Smearing Effects, Jason S. Brown, Michael P. Hickey Ph.D.
Gravity Wave Propagation Directions Inferred From Satellite Observations Including Smearing Effects, Jason S. Brown, Michael P. Hickey Ph.D.
Michael P. Hickey
We simulate space-based, sublimb viewing observations of airglow brightness fluctuations caused by atmospheric gravity wave interactions with the O2 atmospheric airglow, and we demonstrate that because of the geometry associated with such observations, the brightness fluctuations observed for the optically thick 0–0 band emission will always appear stronger for waves traveling toward the observer (the satellite). The effect should be most noticeable for waves having relatively small vertical wavelengths (∼10 km) and horizontal wavelengths of 50 km or greater. For waves of short (∼100 km) horizontal wavelength, the brightness fluctuation anisotropy with respect to viewing direction may also be evident …
Atmospheric Methane Over The Arctic Ocean: Thermal Ir Satellite And Ship- Based Observations, Leonid Yurganov
Atmospheric Methane Over The Arctic Ocean: Thermal Ir Satellite And Ship- Based Observations, Leonid Yurganov
Leonid Yurganov
Recent warming of the Arctic stimulated speculations about dissociation of methane hydrates in the Arctic seabed and a new climatic positive feedback. Here, for the first time, methane low tropospheric satellite retrievals over the Arctic from two instruments: AIRS (Atmospheric IR Sounder) and IASI (Infrared Atmospheric Sounding Interferometer) were analyzed. Analyzed are data for areas over open water with high values of the vertical thermal contrast (ThC, defined here as the temperature difference between the surface and altitude of 4 km); they have been found to be reliable. The seasonal cycles of the data well correlate with the cycles measured …