Response of GOLD Retrieved Thermospheric Temperatures to Geomagnetic Activities of Varying Magnitudes | CU Experts

Global-scale Observations of Limb and Disk (GOLD) disk measurements of; far ultraviolet molecular nitrogen band emissions are used to retrieve; temperatures (T$_{disk}$), which are representative of lower; thermospheric altitudes. The present investigation studies the response; of lower thermospheric temperatures to geomagnetic activities of varying; magnitudes. In this study, it has been observed that T$_{disk}$; increases over all latitudes in response to enhanced geomagnetic; activity. The increase in temperature is proportional to the strength of; the geomagnetic activity and is greater at higher latitudes. Temperature; enhancements vary from 10s to 100s of Kelvins from low- to; mid-latitudes. Local time behavior shows that pre-noon enhancements in; temperatures, during relatively stronger geomagnetic activities, are; greater compared to afternoon, which can be attributed to the combined; action of daytime dynamics and geomagnetic forcing. This study thus; demonstrates the utility of GOLD T$_{disk}$ measurements; investigating the effects of dynamical and external forcings in the; thermosphere.

Laskar FI; Eastes RW; Codrescu MV; Evans JS; Burns AG; Wang W; McClintock WE; Cai X

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