3 papers
astro-ph.SR2026
Machine Learning-Based Characterization of Solar p-Mode Frequency Shifts during Solar Cycle 25
Rekha Jain, Akash Kumar, Sushanta C. Tripathy
The solar interior is probed by the properties of the Sun's acoustic oscillations (p-modes) observed on the solar surface. The frequencies of these p-modes measured in the last thr…
physics.space-ph2025
A composite of the effects of major sudden stratospheric warming events on carbon dioxide radiative cooling in the mesosphere-lower-thermosphere
Akash Kumar, MV Sunil Krishna, Alok K Ranjan
The major sudden stratospheric warming (SSW) events strongly influence the mean structure of the entire atmosphere, from the troposphere to the thermosphere. These events disrupt t…
physics.space-ph2025
Evidence of potential thermospheric overcooling during the May 2024 geomagnetic superstorm
Alok Kumar Ranjan, Dayakrishna Nailwal, MV Sunil Krishna +2
During intense geomagnetic storms, the rapid and significant production of NO followed by its associated infrared radiative emission in lower thermosphere contributes crucially to…