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Absorption of cosmic noise in the E‐region during electron heating events. A new class of riometer absorption events
Author(s) -
Stauning Peter
Publication year - 1984
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/gl011i012p01184
Subject(s) - riometer , absorption (acoustics) , noise (video) , daytime , ionosphere , electron , cosmic cancer database , physics , ionospheric absorption , polar , incoherent scatter , astrophysics , atmospheric sciences , environmental science , astronomy , optics , nuclear physics , artificial intelligence , computer science , image (mathematics)
The incoherent scatter radar facility (ISR) recently installed at Søndre Strømfjord, Greenland (inv. lat. = 74°) has been used to investigate events of substantially elevated E‐region temperatures related to the occurrence of strong horizontal electric fields. It has been found that a peculiar type of weak, slowly fluctuating cosmic noise absorption commonly observed in the daytime on riometers in the polar region could be caused by non‐deviative collisional absorption resulting from the strongly enhanced electron‐neutral collision frequencies in the heated E‐region.