基于实景三维模型的海岸建筑退缩线划定及管控新方法研究

海岸建筑退缩线作为一项科学有效的保护和管理海岸带开发的手段在国际上得到广泛应用。本文以某市的海岸建筑退缩线的划定及管控为例,构建高精度实景三维模型对海岸带建筑退缩线及附属要素进行采集、编辑,采取“基础退缩距离划定+特定要素修正”方式进行核心退缩线的划定,要素叠加实景三维模型,形成海岸带管理系统,做到要素全方位、立体化展示和查询,为海岸建筑退缩区的精细化管控提供有力支撑。     

基于无线电探空和无线电掩星观测的北极上层气温研究

The air temperature is one of the most important parameters used for monitoring the Arctic climate change. The constellation observing system for meteorology, ionosphere, and climate and Formosa Satellite Mission 3(COSMIC/FORMOSAT-3) radio occultation(RO) "wet" temperature product(i.e., "wet Prf") is used to analyze the Arctic air temperature profiles at 925–200 hPa in 2007–2012. The "wet" temperatures are further compared with radiosonde(RS) observations. The results from the spatially and temporally synchronized RS and COSMIC observations show that their temperatures agree well with each other, especially at 400 hPa. Comparisons of seasonal temperatures and anomalies from the COSMIC and homogenized RS observations suggest that the limited number of COSMIC observations during the spatial matchup may be insufficient to describe the smallscale spatial structure of temperature variations. Furthermore, comparisons of the seasonal temperature anomalies from the RS and 5°×5° gridded COSMIC observations at 400 hPa during the sea ice minimum(SIM) of2007 and 2012 are also made. The results reveal that similar Arctic temperature variation patterns can be obtained from both RS and COSMIC observations over the land area, while extra information can be further provided from the densely distributed COSMIC observations. Therefore, despite COSMIC observations being unsuitable to describe the Arctic temperatures in the lowest level, they provide a complementary data source to study the Arctic upper-air temperature variations and related climate change.     

遥感技术在临沂地区地热资源勘查中的应用

应用遥感技术和遥感卫星数据,通过图像信息提取,建立与地热资源有关的解译标志,进行野外验证,快速、准确地对临沂地区地热资源的地层、岩体、构造进行解译,初步建立了遥感地热资源模型。该方法克服了传统调查方法周期长、费用高等缺点,弥补了常规方法难以发现地热异常调查的缺陷。     

广西建旺铅锌矿床硫化物微量元素组成特征

广西北山矿田内分布有众多铅锌矿床(点),对这些矿床(点)的地质地球化学研究较为薄弱，其铅锌成矿作用与成矿潜力研究缺少实际依据。建旺铅锌矿床是矿田内重要的矿床之一，为了揭示该矿床闪锌矿和黄铁矿微量元素替换机制、成矿流体特征和矿床成因，探讨区内铅锌成矿作用，本文利用激光剥蚀电感耦合等离子质谱仪(LA-ICP-MS)对建旺铅锌矿床的闪锌矿和黄铁矿进行了原位微量元素分析测试。结果显示，闪锌矿中的Mn、Fe、Cd、Ga、Ge和黄铁矿中的Mn、Co、Ni、As主要通过直接替换或耦合替换机制进入矿物晶格中；闪锌矿中的Ag、Pb和黄铁矿中的Cu、Pb既可以通过固溶体形式，也可以以微米级包裹体形式存在于矿物晶体中；建旺铅锌矿床矿化温度为89～191℃(平均124℃)。此外，建旺矿床闪锌矿中的Mn、Ga、Ge和In组成特征与MVT型矿床较为相似，根据二元模式图和黄铁矿Co/Ni值等特征，结合矿床地质特征和成矿流体性质，本文认为建旺铅锌矿床属于MVT型铅锌矿床。