【摘要】：長(zhǎng)時(shí)間序列的太陽(yáng)總輻射(TSI)記錄是研究太陽(yáng)活動(dòng)驅(qū)動(dòng)全球氣候變化機(jī)制的重要基礎(chǔ)。由于月球表層沒(méi)有大氣圈的屏障、水圈的調(diào)節(jié)和生物圈的影響,太陽(yáng)輻射對(duì)月壤直接產(chǎn)生加熱作用。因此,月壤溫度剖面可作為反演TSI記錄的直接證據(jù),而月基平臺(tái)的TSI重建則有賴于明確月壤溫度剖面的變化規(guī)律。 月壤剖面垂直溫度分布主要與月壤物質(zhì)的熱物性有關(guān)。本研究利用熱傳導(dǎo)性能測(cè)試儀器TPS2500S對(duì)月壤物質(zhì)的熱物性進(jìn)行測(cè)試,包括3種月壤主要礦物(輝石、橄欖石、斜長(zhǎng)石)的6種不同粒級(jí)的地球礦物粉末樣品,以及中國(guó)、美國(guó)、日本3國(guó)所研制的模擬月壤樣品,獲取了可靠的月壤物質(zhì)熱物性實(shí)測(cè)數(shù)據(jù),分析了礦物組成、顆粒特性、溫度等因素對(duì)月壤熱物性的影響,一方面為探月相關(guān)領(lǐng)域積累基礎(chǔ)數(shù)據(jù),另一方面也是月壤溫度剖面模型的重要輸入?yún)?shù)。研究表明,月壤主要礦物導(dǎo)熱系數(shù)和熱容總體上均表現(xiàn)出隨礦物顆粒粒徑的增加而上升的變化特征,而熱擴(kuò)散系數(shù)則呈現(xiàn)相反的變化趨勢(shì)；不同礦物的變化規(guī)律有所差異。不同模擬月壤熱物性特征較為接近,均屬低熱導(dǎo)材料,其導(dǎo)熱系數(shù)與粒徑大小具有正相關(guān)關(guān)系；隨溫度的升高,其熱傳輸能力增強(qiáng),熱物性隨溫度升高所引起的變幅趨于減小。 月壤溫度剖面是隨深度和時(shí)間變化的函數(shù)。本研究從熱傳導(dǎo)理論出發(fā),利用月壤溫度剖面模型,編寫(xiě)計(jì)算機(jī)程序進(jìn)行數(shù)值運(yùn)算,模擬了不同時(shí)段、不同月面緯度的月壤溫度剖面,并以虹灣作為特征地區(qū)模擬其月壤剖面溫度垂直分布特征；同時(shí),對(duì)影響月壤剖面溫度垂直分布規(guī)律的因素進(jìn)行了分析,包括礦物組成、顆粒特性、模擬月壤及其所引起的熱物性特征,以及月球內(nèi)部熱流等。研究表明,月壤溫度剖面在白晝期間表現(xiàn)為由表層往深層傳導(dǎo)熱量,夜晚期間的情況則相反；剖面溫度晝夜變幅由表層往深層逐漸減小,至0.5-0.6m以下基本保持恒溫；月壤剖面溫度垂直變幅由低緯度往高緯度逐漸減��；導(dǎo)熱系數(shù)大的礦物組成、顆粒粒徑、模擬月壤,其月壤剖面中的垂直溫度梯度更大。 在此基礎(chǔ)上,對(duì)研究中存在的問(wèn)題進(jìn)行了分析,并對(duì)后續(xù)研究進(jìn)行展望,即從機(jī)制上把握月壤剖面溫度垂直變化規(guī)律,剔除非太陽(yáng)輻射強(qiáng)迫所引起的噪音,將其作為直接證據(jù)反演過(guò)去更長(zhǎng)時(shí)間尺度的TSI序列；形成m級(jí)精度以上的月球表面溫度分布模型和月壤溫度剖面模型。
[Abstract]:The (TSI) records of solar total radiation in long time series are the important basis for studying the mechanism of global climate change driven by solar activity. Because there is no atmospheric barrier on the surface of the moon, the regulation of hydrosphere and the influence of biosphere, solar radiation directly heats the lunar soil. Therefore, the lunar soil temperature profile can be used as direct evidence for retrieving the TSI records, and the TSI reconstruction of the lunar platform depends on the understanding of the variation law of the lunar soil temperature profile. The vertical temperature distribution of lunar soil is mainly related to the thermal properties of lunar soil. In this study, the thermal properties of lunar soil were measured by TPS2500S, including 6 kinds of earth mineral powder samples of three major minerals (pyroxene, olivine, plagioclase), as well as China and the United States. The simulated lunar soil samples developed by three countries in Japan have obtained reliable measured data on the thermal properties of lunar soil, and analyzed the effects of mineral composition, particle characteristics and temperature on the thermal properties of lunar soil. On the one hand, it accumulates the basic data in the related fields of lunar exploration, on the other hand, it is an important input parameter of the temperature profile model of lunar soil. The results show that the thermal conductivity and heat capacity of the main minerals in the lunar soil generally show the characteristics of increasing with the increase of the particle size, while the thermal diffusion coefficient shows the opposite trend, and the variation law of different minerals is different. The thermal properties of different simulated lunar soils are similar and belong to low thermal conductivity materials, and their thermal conductivity is positively correlated with the size of particle size, and the heat transfer capacity increases with the increase of temperature, and the amplitude of variation caused by the increase of temperature tends to decrease. The temperature profile of lunar soil is a function of variation with depth and time. Based on the theory of heat conduction and the model of lunar soil temperature profile, a computer program is compiled to simulate the temperature profile of lunar soil in different periods and different latitudes of lunar surface. The vertical temperature distribution in the lunar soil profile was simulated by using Hongwan as the characteristic area, and the factors influencing the vertical temperature distribution in the lunar soil profile were analyzed, including the mineral composition and particle characteristics. Simulation of lunar soil and its thermal properties, as well as the interior heat flow of the moon. The results show that the temperature profile of the lunar soil shows heat transfer from the surface to the deep layer during the day and the contrary during the night, and the diurnal variation of the temperature decreases gradually from the surface layer to the deep layer, and keeps the constant temperature below 0.5-0.6 m. The vertical temperature range of lunar soil profile gradually decreases from low latitude to high latitude, and the vertical temperature gradient in lunar soil profile is larger for mineral composition with large thermal conductivity, particle size and simulated lunar soil. On this basis, the existing problems in the study are analyzed, and the future research is prospected, that is, to grasp the vertical variation law of the temperature in the lunar soil profile from the mechanism, and to eliminate the noise caused by the non-solar radiation forcing. It is used as direct evidence to invert the TSI series of the past longer time scale and to form the lunar surface temperature distribution model and lunar soil temperature profile model with more than m-order accuracy.
【學(xué)位授予單位】：華東師范大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：P184

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