Other
Scientific paper
Aug 1981
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981p%26ss...29..837l&link_type=abstract
Planetary and Space Science, vol. 29, Aug. 1981, p. 837-842.
Other
13
Geomagnetism, Magnetic Storms, Plasma Density, Plasma Temperature, Plasma-Electromagnetic Interaction, Space Plasmas, Adiabatic Conditions, Magnetohydrodynamic Flow, Plasma Cooling, Plasma Layers, Temperature Profiles
Scientific paper
The temperature and density of the plasma in the earth's distant plasma sheet at downstream distances of about 20-25 earth radii, are examined during a high geomagnetic disturbance period. It is shown that the plasma sheet cools when magnetospheric substorm expansion is indicated by the AE index. During cooling, the plasma sheet temperature, T, and the number density, N, are related by T proportional to N to the 2/3 power (adiabatic process) in some instances, while by T proportional to 1/N (isobaric process) in other cases. The total plasma and magnetic pressure decreases when T is proportional to 1/N and increases when T is proportional to 1/N. Observation also indicates that the dawn-dusk component of plasma flow is frequently large and comparable to the sunward-tailward flow component near the central plasma sheet during substorms.
Ackerson K. L.
Akasofu Syuh-Ichi
Frank Louis A.
Lui Anthony Tat Yin
Meng Ching I.
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