Nighttime variation of thermospheric winds and temperatures over Fritz Peak Observatory during the geomagnetic storm of March 2, 1983

Physics

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Atmospheric Temperature, Magnetic Storms, Nocturnal Variations, Thermosphere, Wind Measurement, Doppler Effect, Fabry-Perot Spectrometers

Scientific paper

Evidence for effects produced in the thermospheric wind (TW) by the magnetospheric convection pattern (MCP) is discussed. Data were taken of the forbidden OI emission line, the geomagnetic quiet time circulation, the temperature structure, and geomagnetic disturbances over Fritz Peak on March 3, 1983. Westward winds were observed to increase by several hundred mps at the same time as Kp increased. An enhancement of the neutral temperature from 1300-1600 K was detected during continuing measurements. The connection with the wind was valid down to an L shell of 2.5. The storm had penetrated the farthest south of of any storm in a decade. Further correlations have been previously found between enhanced MCPs and westward TWs in the early evening hours, which supports the connections derived with the Fritz Peak data.

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