首页> 外文期刊>Icarus: International Journal of Solar System Studies >Comparison of HIPWAC and Mars Express SPICAM observations of ozone on Mars 2006-2008 and variation from 1993 IRHS observations
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Comparison of HIPWAC and Mars Express SPICAM observations of ozone on Mars 2006-2008 and variation from 1993 IRHS observations

机译:HIPWAC和Mars Express 2006-2008年火星上SPICAM臭氧观测值的比较以及1993年IRHS观测值的变化

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摘要

Ozone is a tracer of photochemistry in the atmosphere of Mars and an observable used to test predictions of photochemical models. We present a comparison of retrieved ozone abundances on Mars using ground-based infrared heterodyne measurements by NASA Goddard Space Flight Center's Heterodyne Instrument for Planetary Wind And Composition (HIPWAC) and space-based Mars Express Spectroscopy for the Investigation of the Characteristics of the Atmosphere of Mars (SPICAM) ultraviolet measurements. Ozone retrievals from simultaneous measurements in February 2008 were very consistent (0.8 μm-atm), as were measurements made close in time (ranging from <1 to >8 μm-atm) during this period and during opportunities in October 2006 and February 2007. The consistency of retrievals from the two different observational techniques supports combining the measurements for testing photochemistry-coupled general circulation models and for investigating variability over the long-term between spacecraft missions. Quantitative comparison with ground-based measurements by NASA/GSFC's Infrared Heterodyne Spectrometer (IRHS) in 1993 reveals 2-4 times more ozone at low latitudes than in 2008 at the same season, and such variability was not evident over the shorter period of the Mars Express mission. This variability may be due to cloud activity.
机译:臭氧是火星大气中光化学的示踪剂,可用于测试光化学模型的预测值。我们通过NASA戈达德太空飞行中心的行星外风和成分外差仪(HIPWAC)和天基火星快速光谱法研究地面大气红外外差测量结果,比较了火星上回收的臭氧丰度,并对火星大气特征进行了研究火星(SPICAM)紫外线测量。在此期间以及在2006年10月和2007年2月的机会中,及时测量(从<1到> 8μm-atm)非常接近(2008年2月同时进行的测量),臭氧的恢复非常一致(0.8μm-atm)。从两种不同的观测技术中获取的结果的一致性,支持将测量结果结合起来,以测试光化学耦合的一般循环模型以及调查航天器任务之间长期的变异性。 1993年,NASA / GSFC的红外外差光谱仪(IRHS)与地面测量结果进行了定量比较,结果显示,同一个季节,低纬度地区的臭氧量是2008年同期的2-4倍,而这种变率在较短的火星期间并不明显特快任务。这种变化可能是由于云活动造成的。

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