Total hydrogen mixing ratio anomaly around the mesopause region

The Effect of Increased Hydrogen Mixing Ratio on Organic Haze Production on the Early Earth

The atmospheric neutrino anomaly without maximal mixing ?

We consider a pattern of neutrino masses in which there is an approximate mass degeneracy between the two mass eigenstates most coupled to the ν µ and ν τ flavour eigenstates. Earth-matter effects can lift this degeneracy and induce an effectively maximal mixing between these two generations. This occurs if ν e 's contain comparable admixtures of the degenerate eigenstates, even rather small on...

Generalized Neutrino Mixing from the Atmospheric Anomaly

We determine the neutrino mixing and mass parameters that are allowed by the Super–Kamiokande atmospheric neutrino data in a three–neutrino model with one mass–squared difference contributing to the oscillations. We find that although νμ → ντ oscillations are favored, νμ → νe oscillations with amplitude as large as 0.18 are allowed even after accounting for the limit from the CHOOZ reactor expe...

VHF radar observations of turbulent structures in the polar mesopause region

The mobile SOUSY VHFRadar was operated in the summer of 1987 during the MAC/SINE campaign in northern Norway to study the polar mesosphere summer echoes (PMSE). Measurements of the spectral width indicate that two types of structures occur. In general mesospheric layers are bifurcated exhibiting a narrow spectral width and a well-de®ned aspect sensitivity. However, for about 10% of the observat...

Atmospheric neutrino anomaly without maximal mixing?

We consider a pattern of neutrino masses in which there is an approximate mass degeneracy between the two mass eigenstates most coupled to the nm and nt flavor eigenstates. Earth-matter effects can lift this degeneracy and induce an effectively maximal mixing between these two generations. This occurs if ne’s contain comparable admixtures of the degenerate eigenstates, even if they are not larg...