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为了解决北京气象信息网络安全和有效地满足气象信息共享、等级保护和未来发展的需求,在分析现有北京气象信息网络建设中存在安全风险的基础上,从人员思想意识、管理和技术等方面提出了一套比较完整的解决信息安全问题思路。结果表明：可从信息安全系统建设方面以安全等级划分作为首要切入点,建立安全域,解决办公网、业务网和互联网三网关联问题。将安全检查评估和加固贯穿到信息系统整个周期,采用网络安全联防机制安全准入方案,解决VPN接入导致的网络边界模糊问题。可根据信息系统属性和损害客体及损害程度划分信息系统等级。此研究思路,对气象信息系统安全的进一步发展有参考依据。 相似文献
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为了解决北京气象信息网络安全和有效地满足气象信息共享、等级保护和未来发展的需求,在分析现有北京气象信息网络建设中存在安全风险的基础上,从人员思想意识、管理、技术等方面提出了一套比较完整的解决信息安全问题思路。结果表明：可从信息安全系统建设方面以安全等级划分作为首要切入点,建立安全域,解决办公网、业务网和互联网三网关联问题。将安全检查评估和加固贯穿到信息系统整个周期,采用网络安全联防机制安全准入方案解决VPN接入导致的网络边界模糊问题。可根据信息系统属性和损害客体及损害程度来划分信息系统等级。此研究思路,对气象信息系统安全的进一步发展有参考意义。 相似文献
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四川省气象信息共享系统建设初探 总被引：2，自引：0，他引：2
气象信息共享系统是气象信息系统建设的目标。本文从新的业务技术体制改革对省级气象信息系统的要求出发,结合我省实际,围绕四川省气象信息共享系统的构建,对全省信息网络系统的组成和构架、信息收集传输系统和流程、以数据库为核心的信息信息管理系统以及气象信息应用系统的建设提出初步设想,旨在为我省气象信息系统的构建提供一个探讨的基础。 相似文献
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气象信息共享系统是气象信息系统建设的目标.本文从新的业务技术体制改革对省级气象信息系统的要求出发,结合我省实际,围绕四川省气象信息共享系统的构建,对全省信息网络系统的组成和构架、信息收集传输系统和流程、以数据库为核心的信息信息管理系统以及气象信息应用系统的建设提出初步设想,旨在为我省气象信息系统的构建提供一个探讨的基础. 相似文献
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在综合分析了云计算模型灵活、稳定、可靠的优势后,本文提出了云计算在省级气象信息系统建设中运用的解决方案。实践证明,基于云计算平台建设气象信息系统,是提高计算资源的利用率和可扩展性,增强系统的可靠性、可用性和易维护性的理想方案。 相似文献
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关于气象信息系统建设的思考 总被引：2，自引：0，他引：2
围绕中国气象事业发展战略研究成果以及业务技术体制改革对信息系统建设的总体要求，在认真分析山东信息系统建设的现状以及面临的机遇与挑战的基础上，从思想认识上要实现四个转变入手，探讨了当前我省信息系统建设需要强化的三个方面重点工作以及要正确处理好的三个方面关系，以更好的适应气象事业可持续发展的需要。 相似文献
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V. V. Asmus A. I. Bedritskii V. N. Stasenko S. V. Tasenko A. B. Uspenskii 《Russian Meteorology and Hydrology》2017,42(7):442-451
Two important areas of Roshydromet activity are considered: the development of the space observation system and the creation of the system of ground-, air-, and space-based geophysical monitoring. The investigation, monitoring, and forecasting of the state of the Earth, its climate, severe weather events, catastrophes, and emergencies requires the extended usage of space observation methods. The current state is considered of hydrometeorological space system included in the Roshydromet space observation system. The space- and ground-based segments of this system are briefly described. The ground segment is based on the national space monitoring system which was developed in 1992—2010 and is geographically distributed. The works are reviewed on the formation of the Roshydromet geophysical monitoring system using ground-based, airborne, and space-based observations. 相似文献
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Earth system models of intermediate complexity: closing the gap in the spectrum of climate system models 总被引：10，自引：7，他引：10
M. Claussen L. Mysak A. Weaver M. Crucifix T. Fichefet M.-F. Loutre S. Weber J. Alcamo V. Alexeev A. Berger R. Calov A. Ganopolski H. Goosse G. Lohmann F. Lunkeit I. Mokhov V. Petoukhov P. Stone Z. Wang 《Climate Dynamics》2002,18(7):579-586
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A.L. Kurapov G.D. Egbert J.S. Allen R.N. Miller 《Dynamics of Atmospheres and Oceans》2009,48(1-3):198
The impact of surface velocity and SSH data assimilated in a model of wind-driven upwelling over the shelf is studied using representer and observational array mode analyses and twin experiments, utilizing new tangent linear (TL) and adjoint (ADJ) codes. Bathymetry, forcing, and initial conditions are assumed to be alongshore uniform reducing the problem to classical two-dimensional. The model error is attributed to uncertainty in the surface wind stress. The representers, analyzed in cross-shore sections, show how assimilated observations provide corrections to the wind stress and circulation fields, and give information on the structure of the multivariate prior model error covariance. Since these error covariance fields satisfy the dynamics of the TL model, they maintain dominant balances (Ekman transport, geostrophy, thermal wind). Solutions computed over a flat bottom are qualitatively similar to a known analytical solution. Representers obtained with long cross-shore decorrelation scale for the wind stress errors lx (compared to the distance to coast) exhibit the classical upwelling structure. Solutions obtained with much smaller lx show structure associated with Ekman pumping, and are nearly singular if lx is smaller than the grid resolution. The zones of maximum influence of observations are sensitive to the background ocean conditions and are not necessarily centered around the observation locations. Array mode analysis is utilized to obtain model structures (combinations of representers) that are most stably observed by a given array. This analysis reveals that for realistic measurement errors and observational configurations, surface velocities will be more effective than SSH in providing correction to the wind stress on the scales of tens of km. In the DA test with synthetic observations, the prior nonlinear solution is obtained with spatially uniform alongshore wind stress and the true solution with the wind stress sharply reduced inshore of the upwelling front, simulating expected ocean–atmosphere interaction. Assimilation of daily-averaged alongshore surface currents provides improvement to both the wind stress and circulation fields. 相似文献
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For the first time in Russia, the Vaisala LS 8000 lightning detector has been brought into operation which provides the acquisition, processing, and archiving of the lightning discharge data (coordinates, polarity, discharge type, currents, etc.) on the territory of the North Caucasus. For the purpose of operational hydrometeorological services, it is proposed to use the real-time combination of the synthesized chart of the echo of clouds and precipitation of the regional network of meteorological radars and the thunderstorm cells plotted from the lightning points (coordinates) using the cluster analysis. Presented is the analysis of the results of the registration of currents of surface discharges and of the time of their growth obtained during the period of operation since 2008. 相似文献
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The breeding method has been widely used in studies of data assimilation, predictability and instabilities. The bred vectors(BVs), which are the nonlinear difference between the control and perturbed runs, represent the time-evolving rapidly growing errors in dynamic systems. The Lorenz(1963) model(hereafter Lorenz63 model) has chaotic dynamics similar to weather and climate. This study investigates the features of BVs of the Lorenz63 model and its impact on regime prediction of the Lorenz63 model. The results show that the Lorenz63 model has two different BVs for each breeding cycle, and the two BVs approach being identical when growth rate is high. The duration of the current and next regime is associated with the relative directions between the BV with high growth rate and the model trajectory. 相似文献
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青藏高原天气系统与背风坡浅薄天气系统耦合相互作用的特征分析 总被引：12，自引：1，他引：12
利用１９８０年到１９９０年和１９９８年讯期共１３个暴雨个例，反演高原天气系统与背风坡浅薄天气系统耦合相互作用的具体形式。经等压面和垂直剖面上若干物理量分析，揭示了高原天气系统与背风坡浅薄天气系统耦合相互作用的一些主要特征。结果表明：大气内部压能场与流场非平衡强迫既是高原天气系统和背风坡浅薄天气系统发生、发展和东移的动力机制，又是这两类系统耦合相互作用的动力条件。涡度局地变化率的正值区对两类系统的移 相似文献
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Equilibria of the marine multiphase ammonia system 总被引：3，自引：0，他引：3
A lack of empirical data has made it difficult to ascertain whether ammonia is in equilibrium between the oceanic, atmospheric gas and atmospheric particle phases in the remote marine environment. Reported here are simultaneous measurements of the saturation concentration of ammonia relative to ammonia concentrations in ocean surface waters; total seawater ammonia; atmospheric gas phase ammonia; and atmospheric particulate-phase ammonium, non-seasalt sulfate, methanesulfonate, and nitrate. Sampling was performed in May of 1987 in the northeast Pacific Ocean environment and in April and May of 1988 in the central Pacific Ocean environment.These measurements were used to determine the degree to which ammonia approached equilibrium between the oceanic and atmospheric gas and aerosol particle phases. The experimental atmospheric gas phase ammonia concentrations were compared with calculated equilibrium concentrations assuming a Henry's law type of partitioning between the gas and condensed phases. Characteristic times of the processes controlling the fate of ammonia in the marine environment also were compared.The measured atmospheric gas phase and oceanic concentrations of ammonia indicate that ammonia is not in a Henry's law equilibrium across the air/sea interface. This disequilibrium is a result of the long air/sea exchange equilibration time relative to the lifetime of ammonia in the atmosphere. Comparison of the calculated equilibrium gas phase ammonia concentrations with the measured gas phase ammonia concentrations shows that attainment of equilibrium between the atmospheric gas and particle phases is a strong function of the chemical composition of the aerosol particles. The data suggest that fully neutralized aerosol particles are not in Henry's law equilibrium with the gas phase while equilibrium is observed for particles with an average ammonium to non-seasalt sulfate molar ratio less than 1.8. 相似文献