摘要
Investigation of the distribution,evolution,and interactions of atmospheric components on Mars is crucial for understanding its climate and environment.The Spectroscopy Spectrograph for the Investigation of Characteristics of the Atmosphere of Mars(SPICAM),an instrument on the Mars Express spacecraft launched by the European Space Agency,consists of an ultraviolet channel(118–320 nm)and a near-infrared channel(1000–1700 nm),which provides the most comprehensive vertical spectral dataset of the Martian atmosphere to date.This study analyzes the spectral data obtained from nadir observations of SPICAM's infrared channel during its first operational Martian year(January 2004 to November 2005)on the basis of the spectral theory of O_(2)molecular airglow and the radiative transfer mechanism of H2O in the atmosphere,retrieving the seasonal and global distributions of O_(2)(a^(1)△_(g))airglow intensity and H2O abundance.Results reveal a clear inverse correlation between O_(2)(a^(1)△_(g))airglow intensity and H2O abundance.This finding provides indirect evidence of an anticorrelation between O3 and H2O,given that O_(2)(a^(1)△_(g))airglow serves as a tracer for O3 photodissociation.This will contribute to a deeper understanding of Martian climatology,thereby further refining Martian photochemical models,and assisting in exploring the stability of the Martian atmosphere.
基金
supported by the National Natural Science Foundation of China(Grant Nos.62305283,41975039,and 42075149)
the Natural Science Foundation of Shandong Province(Grant No.ZR2021QD088)
the Youth Innovation and Technology Support Program for Colleges and Universities in Shandong Province(Grant No.2021KJ008)。
