青岛市气象局网络安全管理系统

网络安全是影响气象通信网络性能和功能的重要因素。从线路设备、安全设备和措施、安全管理制度3个方面结合青岛市气象局具体情况进行了网络安全系统建设的介绍,内容包括通信线路的冗余、核心设备的热备份、网络安全设备的应用和安全控制策略、用户和管理员安全管理规定,并详细介绍了防火墙配置、核心交换机热备、关键服务器的访问控制等关键技术的实现,最后根据网络安全建设经验对地市级气象局的网络安全建设提出了一些建议。     

基于GIS的雷电数据可视化地图组件设计与实现

雷电发生发展于地理空间,具有明显的时空特性,因此在地理信息平台的支持下进行各种雷电数据空间及其属性特征分析具有重要的意义。在ArcEngine的基础上,设计研发了雷电数据可视化地图组件（Thunder Map）,按照数据定义层、数据功能层以及地图UI层的3层逻辑结构,实现了各种雷电相关数据基于地理信息平台的可视化表达,并提供了相关数据管理与功能分析的操作接口,为基于地理空间信息的雷电数据处理提供可视化的功能组件支持。     

青岛市短期预报资料综合应用平台功能设计与实现

为综合应用本地探测资料和数值预报产品,青岛市气象局建立了以图形工作站为交互平台的短期预报资料综合应用系统.系统采用0racle数据库技术、Web技术及Java、ASP编程语言,实现了本地探测资料、部门共享资料、数值预报产品等不同来源的数据集中显示.     

玉林新一代天气雷达综合防雷设计

通过对玉林新一代天气雷达情况的分析,根据综合防雷设计的要求提出了玉林新一代天气雷达的具体防雷设计方法,重点突出直击雷防护及电子设备线路的防护措施,从而提高雷达站防御雷击侵害的能力,确保雷达站安全、可靠运行。     

ATLAS III in situ heating test in boom clay: Field data,observation and interpretation

The ATLAS III small scale in situ heating test aimed at assessing the thermo-hydro-mechanical (THM) effects on the Boom clay of the significant temperature gradients generated in this host rock as a consequence of the geological disposal of radioactive, heat-emitting wastes. This paper presents data on temperature, pore water pressure and total stress measured during the experiment and highlights several interesting observations regarding the thermal anisotropy and THM coupling in the Boom clay. The test has a simple geometry and well defined boundary conditions, which facilitates the comparison between measurement and numerical modeling studies. These studies included three dimensional coupled THM modeling of the test. The good agreement between measurement and numerical modeling of temperature and pore water pressure yields a set of THM parameters and confirms the thermo-mechanical anisotropy of the Boom clay.     

Detrital Zircon Dating of Meso- and Neoproterozoic Rocks in North China and Its Implications

New dates from Meso- and Neoproterozoic strata contribute to the recently defined Precambrian stratigraphical timescale of China agreed by the Subcommission on the Precambrian System, and the National Commission on Stratigraphy of China on Nov. 24, 2009. First, the age range of the Changcheng System, including the Changzhougou, Chuanlinggou, Tuanshanzi and Dahongyu formations has been constrained to 1.8–1.6 Ga. Second, the Jixian System including the Gaoyuzhuang, Yangzhuang, Wumishan, Hongshuizhuang and Tieling formations has been constrained to 1.6–1.4 Ga. Third, an as-yet unnamed (undefined) system (1.4–1.0 Ga) is only developed in the Xiamaling Formation at the Jixian section, Tianjing. Fourth, the Qingbaikou System, including the Luotuoling and Jing’eryu formations has been constrained to 1.0–0.78 Ga. Fifth, the Nanhuan System ranges between 780–635 Ma, and the Sinian System is within 635–542 Ma. However, according to a series of SHRIMP U-Pb dates from the late Precambrian in the Jiangnan Orogen Belt in South China Platform, the constrained strata will be redefined as in the upper part of the Qingbaikou System. To aid global geodynamics, it is useful to denote a late Precambrian section with unified, precise and high-precision chronological dating; this is here defined in North China Block and Jiaoliao-Korean Block. However, the Neoproterozoic Qingbaikou study in North China will be influence in whole Meso- and Neoproterozoic in the Jiangnan Orogenic Belt in between the Yangtze Block and the Cathaysia Block in South China.     

Silicon isotopic composition of dissolved silicon and suspended particulate matter in the Yellow River, China, with implications for the global silicon cycle

The silicon isotopic composition of dissolved silicon and suspended particulate matter (SPM) were systematically investigated in water samples from the mainstem of the Yellow River and 4 major tributaries. The SPM content of the Yellow River varied from 1.4 to 38,560 mg/L, averaging 3568 mg/L, and the δ³⁰Si of suspended particulate matter (δ³⁰Si_SPM) varied from 0.3‰ to −0.4‰, averaging −0.02‰. The major factors affecting the SPM content and the δ³⁰Si_SPM values in the Yellow River were inferred to be the mineralogical, chemical and isotopic characteristics of the sediments from the Loess Plateau and a combination of the climate and the flow discharge of the river.The major ions in the Yellow River water were Na⁺, Ca²⁺, Mg²⁺, HCO₃⁻, SO₄²⁻ and Cl⁻. High salt concentration was observed in samples from the middle and lower reaches, likely reflecting the effects of evaporation and irrigation because the Na⁺, Mg²⁺, SO₄²⁻ and K⁺ concentrations were correlated with the Cl⁻ concentration. The dissolved Si concentration (D_Si) increased downstream, varying from 0.016 to 0.323 mM. The δ³⁰Si of dissolved Si (δ³⁰Si_Diss) varied from 0.4‰ to 2.5‰, averaging 1.28‰. The major processes controlling the D_Si and δ³⁰Si_Diss of the Yellow River are (a) the weathering of silicate rocks, (b) the formation of phytoliths in plants, (c) the evaporation of water from and the addition of meteoric water to the river system, which only affects concentrations, (d) the adsorption and desorption of aqueous monosilicic acid on iron oxide, and (e) the dissolution of phytoliths in soils.The D_Si and δ³⁰Si_Diss values of global rivers vary spatially and temporally in response to changes in climate, chemical weathering intensity and biological activity. The moderately positive δ³⁰Si_Diss values observed in the Yellow River may be attributed to the higher rates of chemical weathering and biological activities that have been observed in this catchment in comparison with those of other previously studied catchments, excluding the Yangtze River. Human activities may also potentially influence chemical weathering and biological activities and affect the D_Si and δ³⁰Si_Diss values of the major rivers of the world. Further river studies should be performed to gain a better understanding of the global Si isotope budget.     

碎屑锆石对班公湖地区晚侏罗世-早白垩世沉积物源的制约

本文对班公湖地区中生代沙木罗组（J3—K1s）和日松组（J3r）地层的碎屑锆石进行了形态学及U-Pb年代学的研究。结果表明：锆石颗粒粒径约为100～150 μm,内部结构清晰,晶体为长柱状,自形程度较高,多数锆石不含暗色包体及浑圆形内核; 有些锆石颗粒有扇型分带结构。Th/U比值较大,多数大于0.1,均值约为0.86,说明岩浆的成因以锆石为主体,部分颗粒或晶体可能为变质成因; 锆石年龄主要分布在6个区间范围内： 1）180～100 Ma, 2）350～180 Ma, 3）600～450 Ma, 4）1100～600 Ma, 5）1800～1400 Ma, 6）2200～1800 Ma。锆石U-Pb年龄谱对应了羌塘地块经历的几次构造热事件,验证了晚侏罗世—早白垩世班公湖地区的物源主要来自其北部的羌塘地块。     

青藏高原地面有效辐射变化及其对表层土温的影响

利用青藏高原格尔木、狮泉河、昌都日射站及中国科学院冰冻圈观测研究站的观测资料,分析了高原有效辐射的变化,在此基础上结合土壤温度资料讨论了高原北部有效辐射的变化对表层土壤热状况的影响.结果显示：1）青藏高原有效辐射变化因所处的区域不同而异,高原东北部、西部及高原腹地有效辐射总体呈减小的趋势,高原东南部有效辐射呈增大的趋势...