研究火星大气成分的分布、演化和相互作用关系,是理解火星气候环境的关键.欧空局发射的火星快车(Mars Express)上用于研究火星大气特征的光谱学探测仪(Spectroscopy Spectrograph for the Investigation of Characteristics of the Atmo...研究火星大气成分的分布、演化和相互作用关系,是理解火星气候环境的关键.欧空局发射的火星快车(Mars Express)上用于研究火星大气特征的光谱学探测仪(Spectroscopy Spectrograph for the Investigation of Characteristics of the Atmosphere of Mars,SPICAM)由紫外通道(118~320nm)和近红外通道(1000~1700nm)两个通道组成,提供了迄今为止火星大气垂直区域光谱数据最全面的数据集.基于O_(2)分子气辉光谱理论及H_(2)O的大气辐射传输机理,对SPICAM红外通道在仪器运行的第一个火星年(2004-01至2005-11)的天底观测获得的光谱进行数据分析获得了O_(2)(a^(1)Δ_(g))气辉强度与H_(2)O丰度的季节及全球分布,研究结果表明,O_(2)(a^(1)Δ_(g))气辉强度与H2O丰度具有明显的负相关性;由于O_(2)(a^(1)Δ_(g))气辉可作O_(3)光解的示踪剂,可间接证明O_(3)和H_(2)O的负相关性.研究结果将有助于进一步了解火星气候学从而进一步完善火星光化学模型,助力探索火星大气稳定性问题.展开更多
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 Characteri...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.展开更多
文摘研究火星大气成分的分布、演化和相互作用关系,是理解火星气候环境的关键.欧空局发射的火星快车(Mars Express)上用于研究火星大气特征的光谱学探测仪(Spectroscopy Spectrograph for the Investigation of Characteristics of the Atmosphere of Mars,SPICAM)由紫外通道(118~320nm)和近红外通道(1000~1700nm)两个通道组成,提供了迄今为止火星大气垂直区域光谱数据最全面的数据集.基于O_(2)分子气辉光谱理论及H_(2)O的大气辐射传输机理,对SPICAM红外通道在仪器运行的第一个火星年(2004-01至2005-11)的天底观测获得的光谱进行数据分析获得了O_(2)(a^(1)Δ_(g))气辉强度与H_(2)O丰度的季节及全球分布,研究结果表明,O_(2)(a^(1)Δ_(g))气辉强度与H2O丰度具有明显的负相关性;由于O_(2)(a^(1)Δ_(g))气辉可作O_(3)光解的示踪剂,可间接证明O_(3)和H_(2)O的负相关性.研究结果将有助于进一步了解火星气候学从而进一步完善火星光化学模型,助力探索火星大气稳定性问题.
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)。
文摘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.
