Sensitivity analysis of a Martian atmospheric column model with data from the Mars Science Laboratory

IF 16.4 1区 化学 Q1 CHEMISTRY, MULTIDISCIPLINARY
J. Leino, A. Harri, M. Paton, J. Polkko, M. Hieta, H. Savijärvi
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Abstract

Abstract. An extensive sensitivity analysis was performed for a horizontally homogeneous and hydrostatic 1-D column model at the Mars Science Laboratory (MSL) location. Model experiments were compared with observations from the Curiosity Rover Environmental Monitoring Station humidity (REMS-H) device and ChemCam. Based on our earlier column model investigations, model surface temperature and pressure, dust optical depth (τ), and column precipitable water content (PWC) were the parameters that we investigated with our sensitivity analysis. Our analysis suggests that the most sensitive parameters for the column model temperature profile are τ and surface temperature. The initial value of PWC does not affect the temperature profile of the model, but it is the most important parameter for the humidity profile. The fixed value of τ also seems to have some effect on the humidity profile of the model. Based on our analysis, variations in surface pressure initialization are negligible for the model's temperature and almost negligible for the model's humidity predictions. The model simulations are generally in good agreement with the observations. Our additional model experiments with a different shape of the model's initial humidity profile yielded better results compared to the well-mixed assumption in the predicted water vapor volume mixing ratios at 1.6 m.
利用火星科学实验室的数据对火星大气柱模型进行灵敏度分析
摘要。对火星科学实验室(MSL)位置的水平均质和静水一维柱模型进行了广泛的敏感性分析。模型实验与好奇号漫游车环境监测站湿度(REMS-H)装置和化学摄像机的观测结果进行了比较。根据我们早期的气柱模型调查,模型表面温度和压力、尘埃光学深度 (τ) 和气柱可降水含量 (PWC) 是我们通过敏感性分析进行调查的参数。我们的分析表明,对气柱模式温度曲线最敏感的参数是 τ 和表面温度。PWC 的初始值不会影响模型的温度曲线,但却是湿度曲线的最重要参数。τ 的固定值似乎也对模型的湿度曲线有一定影响。根据我们的分析,表面压力初始化的变化对模型温度的影响可以忽略不计,而对模型湿度预测的影响几乎可以忽略不计。模型模拟结果与观测结果基本吻合。与 1.6 米处水汽体积混合比预测的混合良好假定相比,我们对模型初始湿度曲线的不同形状进行了额外的试验,结果更好。
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来源期刊
Accounts of Chemical Research
Accounts of Chemical Research 化学-化学综合
CiteScore
31.40
自引率
1.10%
发文量
312
审稿时长
2 months
期刊介绍: Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.
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