月球表面“冷点”和“热区”研究:嫦娥二号微波亮温数据分析

发布时间：2018-06-27 06:04

本文选题：冷点 + 热区　；参考：《矿物学报》2016年02期

【摘要】：月球微波亮温数据是研究月球表面物理性质的重要数据源。本文基于嫦娥二号微波辐射计37 GHz通道微波亮温数据,计算了亮温数据月球地方时,获取了月球一天中不同时间段的12幅月表微波亮温分布图。其中,月球白天亮温正异常区("热区")和月球夜晚点状亮温负异常区("冷点")是最为显著两类亮温单元。"热区"和"冷点"具有独特的亮温特征和昼夜变化规律:相对周围环境,"热区"在月球白天亮温明显偏高,夜晚亮温较低,"冷点"在月球夜晚亮温明显偏低,白天亮温略高;与同纬度地区相比,"热区"和"冷点"的升温和降温速率都较大。对比分析月表影像图、Ti O2含量、物理温度和石块含量数据,我们发现:"热区"对应月海区Ti O2含量较高,同纬度地区的亮温和Ti O2含量呈明显正相关,较高Ti O2含量是"热区"形成的主要因素;大部分"冷点"中心都对应着年轻辐射纹撞击坑,"冷点"中心夜晚物理温度和岩石含量较高,"冷点"地区亮温与其夜晚温度和石块含量呈负相关分布,较高的石块含量是"冷点"形成的主要因素。
[Abstract]:Lunar microwave brightness temperature data is an important data source for studying the physical properties of lunar surface. Based on the microwave bright temperature data of the 37-GHz channel of the Chang 'e-2 microwave radiometer, this paper has calculated the bright temperature data of the lunar local time, and obtained 12 monthly surface microwave bright temperature maps of different periods of the day on the moon. Among them, the positive temperature anomaly area ("hot zone") and the "cold point" region are the two most significant bright temperature units. " The "hot zone" and "cold spot" have unique bright temperature characteristics and diurnal variation law: compared with the surrounding environment, the "hot zone" is obviously higher in the white day of the moon and lower in the night, and the "cold point" is obviously lower in the night of the moon and slightly higher in the white day; Compared with the same latitudes, the heating and cooling rates of "hot zone" and "cold point" are larger. By comparing and analyzing the data of TIO _ 2 content, physical temperature and rock content, we find that the "hot zone" corresponds to a relatively high TIO _ 2 content in the lunar sea area, and there is a significant positive correlation between the bright and moderate TIO _ 2 contents in the latitude region. Higher TIO _ 2 content is the main factor of the formation of "hot zone". Most of the "cold spot" centers correspond to the impact crater of young radiation stripes. The physical temperature and rock content in the "cold point" center are relatively high at night, and the bright temperature in the "cold spot" region is negatively correlated with the night temperature and the rock content. High stone content is the main factor of formation of "cold spot".
【作者单位】：中国科学院国家天文台月球与深空探测重点实验室;中国科学院大学;
【基金】：国家自然科学基金重大项目(批准号:41590851);国家自然科学基金项目(批准号:41490633) 澳门科技发展基金项目(048/2012/A2,020/2014/A1) 中国科学院西部之光联合学者项目
【分类号】：P184.5

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