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Observation of migrating and nonmigrating diurnal tides in the equatorial lower thermosphere
Author(s) -
Oberheide J.,
Gusev O. A.
Publication year - 2002
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 - 10.1029/2002gl016213
Subject(s) - thermosphere , daytime , atmosphere (unit) , atmospheric sciences , atmospheric tide , altitude (triangle) , amplitude , environmental science , atmospheric temperature , geology , ionosphere , meteorology , physics , geophysics , geometry , mathematics , quantum mechanics
During 9 November 1994, the CRyogenic Infrared Spectrometers and Telescopes for the Atmosphere (CRISTA) experiment measured vertical profiles of temperature up to an altitude of 120 km. Temperatures above 75 km are retrieved from 15 μm CO 2 emissions, accounting for the deviation from the local thermodynamical equilibrium (non‐LTE, NLTE). This study presents the first amplitude and phase measurements of global temperature tides in a region of Earth's atmosphere where prior to CRISTA no daytime and nighttime temperature measurements were available. The migrating and 8 nonmigrating components of the diurnal tide are analyzed from 75–120 km and at 7.5°N. Combined amplitudes exceed 80 K with the nonmigrating components dominant above ∼90 km.