基于综合监控和负载调控的中国天气网网站弹性架构

中国天气网是中国气象局面向公众提供气象信息服务的核心门户。为适应其日益增长的访问量,并保障网站可用性及访问体验等要求,网站已建立包含可用性、用户体验、网站访问、网络、安全、系统和应用等多方面的综合监控系统。实现了可根据体验、可用性、成本、安全等多方面因素,可面向多种具体业务场景的灵活多样的负载调控手段。基于监控和调控,构建了经内容本地加速的多源站弹性架构。在访问体验、可用性、带宽容量、安全、成本、业务特性需求等多方面提升了网站能力。     

多制式移动终端身份感知系统研究

移动终端的合法监管是国家安全部门保障移动网络安全的重要手段,获取移动终端身份标识是实现监管的基础.首先阐述了移动终端的主要身份标识,以及监管系统相关研究现状;然后给出一种面向双频点GSM网络和WCDMA网络的多制式移动终端身份感知系统设计方案,阐明系统技术原理与实现方法,并提出对该系统进行优化的技术方案;最后进行测试,验证了方案的可行性.     

虚拟化桌面云在地市级气象综合业务平台的应用

介绍了基于VMware vSphere架构部署的虚拟化桌面云业务系统的解决方案、网络结构及优化用户体验.以天津市滨海新区气象局为例,重点描述了虚拟化桌面云在提升地市级气象综合业务的移动办公能力、提高资源利用率、提升数据安全、简化系统部署和维护、降低运行成本等方面的应用.通过一体化平台建设,可使气象业务应用软件整齐划一,相对于传统的业务管理具有较大优势.     

广东手机天气短信系统网络建设及业务运行

本文系统地对手机短信发送原理、移动短信网络结构和广东省移动手机短信天气预报系统建设的网络结构3方面内容进行了分析,指出广东移动手机短信天气预报业务现在的建设组网方式,是结合移动网络特点的最优组网方式。     

面向移动计算平台的气象数据可视化系统关键技术

移动计算时代的到来伴随着人工智能、大数据挖掘、GPU并行计算等信息技术的飞跃和Web技术规范的统一,这一发展促进了众多面向移动计算平台的气象数据可视化应用的诞生和蓬勃发展。然而移动计算设备存在计算能力较弱、图形软件库功能不齐全的缺陷,造成国内的气象应用存在着可视化方法陈旧、浏览器兼容性和性能不理想的问题。〖JP2〗为此,本文设计并实现了基于B/S架构、面向移动计算的气象数据交互分析与显示系统WeatherApp。〖JP〗首先研发了二三维一体化的数字地球引擎,该引擎提供了常用的地理信息系统功能,能够在不同维度视图之间快速切换,为全新渲染方法的引入奠定了基础。其次,实现了包括流线和体绘制在内的高级三维可视化方法。本系统已应用于台风预报业务中并取得较好的应用效果。通过支持所有主流桌面和手机浏览器,WeatherApp能够让用户随时随地通过移动计算设备查看感兴趣的资料,进而提高工作效率。     

基于Android系统的智能电视盒气象服务软件设计与实现

随着智能电视盒硬件技术、Android系统以及互联网技术的不断发展,基于Android系统的智能电视盒已成为国内发展最快的朝阳产业之一,智能电视盒应用软件领域也随之孕育而生。为了丰富移动气象信息服务手段,使用Android、Nginx、Web service等技术手段,研发一种智能电视盒气象服务软件:天气盒子。阐述了该软件的系统结构、网络拓扑、服务功能,通过负载均衡技术和网络架构优化,确保系统可快速适应高并发用户以及网络安全;根据智能电视盒的用户操作特性,在客户端的设计上简化了操作流程,提升了用户的体验。该软件填补了气象部门在智能电视盒气象服务领域的缺失。     

网络安全态势感知融入天镜系统的关键技术研究

为构建全业务全流程一体化可视化的气象业务实时监控系统,提升天镜系统监控集约化能力,本文以态势感知系统融入天镜为例,从态势感知数据的确定、数据的融入、评估指标的设计、数据的可视化四个方面阐述了融入流程。基于ElasticSearch、微服务和Java云原生可视化等关键技术,从脆弱性业务、漏洞风险态势、实时危险监控等方面设计态势感知数据在天镜中的可视化展示。     

Unix环境下的Sybase客户端编程

随着９２１０工程的逐步业务化,Ｓｙｂａｓｅ数据库将成为气象业务主数据库。目前广东省气象局业务系统使用的数据库是１９９０年在ＶＡＸ６４４０机器上自己建立的文件级数据库,由于ＶＡＸ机故障频繁,已停止ＶＡＸ机上数据库的使用,将业务移植到Ｓｙｂａｓｅ数据库上。Ｓｙｂａｓｅ数据库是客户／服务器（Ｃｌｉｅｎｔ／Ｓｅｒｖｅｒ）结构的数据库。开发基于Ｓｙｂａｓｅ的数据库应用程序是典型的客户／服务器应用程序。在这种客户／服务器模式中,客户应用程序通过网络向服务器发出请求,而并不直接访问数据库。服务器处理客户的请求…     

广东省气象台气象智能手机客户端的设计与实现

主要介绍了广东省气象台开发的气象智能手机客户端的总体结构、主要功能模块和数据处理方式,以及后续开发的方向。总体结构分为4个部分:气象数据采集系统、数据存储系统、Web服务系统和移动客户端。主要功能模块包括最新预报、监测实况、预警信号、台风路径、决策材料等。气象信息数据分为点类型、线类型、网格类型、文本类型等,根据不同的类型采取不同的处理方式,以提高客户端展示速度及用户的体验效果。未来应当以用户需求为导向,应用4G移动网络和虚拟现实(vr)等新技术进行后续开发。     

基于Android的移动气象信息服务系统设计与实现

为了丰富移动气象信息服务手段提升服务能力,使用Java,C#,VB,Delphi编程,开发了基于智能终端的移动气象信息服务系统。系统以用户体验为切入点结合智能终端特有的设备特性和移动应用软件特性提供创新型移动气象产品。该系统是一种集气象信息处理、发布和接收为一体的服务系统,用户可以通过该系统随时获取气象信息。介绍了系统的架构设计与客户端设计。详细阐述了采用Java技术在Android平台上研发移动客户端软件过程中所涉及问题的解决方法,包括手势控制、GIS服务、软件管理、系统稳定性和兼容性等问题的解决。     

COMPARATIVE ANALYSIS OF VARIOUS DATA OF AIR–SEA TEMPERATURE DIFFERENCE AND ITS VARIATION ACROSS SOUTH CHINA SEA IN THE PAST 35 YEARS

Using the International Comprehensive Ocean-Atmosphere Data Set(ICOADS) and ERA-Interim data, spatial distributions of air-sea temperature difference(ASTD) in the South China Sea(SCS) for the past 35 years are compared,and variations of spatial and temporal distributions of ASTD in this region are addressed using empirical orthogonal function decomposition and wavelet analysis methods. The results indicate that both ICOADS and ERA-Interim data can reflect actual distribution characteristics of ASTD in the SCS, but values of ASTD from the ERA-Interim data are smaller than those of the ICOADS data in the same region. In addition, the ASTD characteristics from the ERA-Interim data are not obvious inshore. A seesaw-type, north-south distribution of ASTD is dominant in the SCS; i.e., a positive peak in the south is associated with a negative peak in the north in November, and a negative peak in the south is accompanied by a positive peak in the north during April and May. Interannual ASTD variations in summer or autumn are decreasing. There is a seesaw-type distribution of ASTD between Beibu Bay and most of the SCS in summer, and the center of large values is in the Nansha Islands area in autumn. The ASTD in the SCS has a strong quasi-3a oscillation period in all seasons, and a quasi-11 a period in winter and spring. The ASTD is positively correlated with the Nio3.4 index in summer and autumn but negatively correlated in spring and winter.     

Could the Recent Taal Volcano Eruption Trigger an El Ni?o and Lead to Eurasian Warming?

正The Taal Volcano in Luzon is one of the most active and dangerous volcanoes of the Philippines. A recent eruption occurred on 12 January 2020(Fig. 1a), and this volcano is still active with the occurrence of volcanic earthquakes. The eruption has become a deep concern worldwide, not only for its damage on local society, but also for potential hazardous consequences on the Earth's climate and environment.     

VARIABILITY OF INTER-ANNUAL RELATIONSHIP BETWEEN INDIAN OCEAN DIPOLE AND HUAXI REGION’S AUTUMN PRECIPITATION

The moving-window correlation analysis was applied to investigate the relationship between autumn Indian Ocean Dipole (IOD) events and the synchronous autumn precipitation in Huaxi region, based on the daily precipitation, sea surface temperature (SST) and atmospheric circulation data from 1960 to 2012. The correlation curves of IOD and the early modulation of Huaxi region’s autumn precipitation indicated a mutational site appeared in the 1970s. During 1960 to 1979, when the IOD was in positive phase in autumn, the circulations changed from a “W” shape to an ”M” shape at 500 hPa in Asia middle-high latitude region. Cold flux got into the Sichuan province with Northwest flow, the positive anomaly of the water vapor flux transported from Western Pacific to Huaxi region strengthened, caused precipitation increase in east Huaxi region. During 1980 to 1999, when the IOD in autumn was positive phase, the atmospheric circulation presented a “W” shape at 500 hPa, the positive anomaly of the water vapor flux transported from Bay of Bengal to Huaxi region strengthened, caused precipitation ascend in west Huaxi region. In summary, the Indian Ocean changed from cold phase to warm phase since the 1970s, caused the instability of the inter-annual relationship between the IOD and the autumn rainfall in Huaxi region.     

IMPACT OF ATMOSPHERIC LOW-FREQUENCY OSCILLATION ON THE IMMIGRATION OF NILAPARVATA LUGENS(STL) IN HUNAN AND JIANGXI PROVINCES

Various features of the atmospheric environment affect the number of migratory insects, besides their initial population. However, little is known about the impact of atmospheric low-frequency oscillation(10 to 90 days) on insect migration. A case study was conducted to ascertain the influence of low-frequency atmospheric oscillation on the immigration of brown planthopper, Nilaparvata lugens(Stl), in Hunan and Jiangxi provinces. The results showed the following:(1) The number of immigrating N. lugens from April to June of 2007 through 2016 mainly exhibited a periodic oscillation of 10 to 20 days.(2) The 10-20 d low-frequency number of immigrating N. lugens was significantly correlated with a low-frequency wind field and a geopotential height field at 850 h Pa.(3) During the peak phase of immigration, southwest or south winds served as a driving force and carried N. lugens populations northward, and when in the back of the trough and the front of the ridge, the downward airflow created a favorable condition for N. lugens to land in the study area. In conclusion, the northward migration of N. lugens was influenced by a low-frequency atmospheric circulation based on the analysis of dynamics. This study was the first research connecting atmospheric low-frequency oscillation to insect migration.     

A COMPARATIVE ANALYSIS OF ATMOSPHERIC AND OCEANIC CONDITIONS BEFORE THE OCCURRENCE OF TWO TYPES OF EL NIO EVENTS

The atmospheric and oceanic conditions before the onset of EP El Ni?o and CP El Ni?o in nearly 30 years are compared and analyzed by using 850 hPa wind, 20℃ isotherm depth, sea surface temperature and the Wheeler and Hendon index. The results are as follows: In the western equatorial Pacific, the occurrence of the anomalously strong westerly winds of the EP El Ni?o is earlier than that of the CP El Ni?o. Its intensity is far stronger than that of the CP El Ni?o. Two months before the El Ni?o, the anomaly westerly winds of the EP El Ni?o have extended to the eastern Pacific region, while the westerly wind anomaly of the CP El Ni?o can only extend to the west of the dateline three months before the El Ni?o and later stay there. Unlike the EP El Ni?o, the CP El Ni?o is always associated with easterly wind anomaly in the eastern equatorial Pacific before its onset. The thermocline depth anomaly of the EP El Ni?o can significantly move eastward and deepen. In addition, we also find that the evolution of thermocline is ahead of the development of the sea surface temperature for the EP El Ni?o. The strong MJO activity of the EP El Ni?o in the western and central Pacific is earlier than that of the CP El Ni?o. Measured by the standard deviation of the zonal wind square, the intensity of MJO activity of the EP El Ni?o is significantly greater than that of the CP El Ni?o before the onset of El Ni?o.     

全球贸易隐含碳变化及其影响分析

基于最新的GTAP8 (Global Trade Analysis Project）数据库,使用投入产出法,分析了2004年到2007年全球贸易变化下南北集团贸易隐含碳变化及对全球碳排放的影响。结果显示,随着发展中国家进出口规模扩张,全球贸易隐含碳流向的重心逐渐向发展中国家转移。2004年到2007年,发达国家高端设备制造业和服务业出口以及发展中国家资源、能源密集型行业及中低端制造业出口的趋势加强,该过程的生产转移导致全球碳排放增长4.15亿t,占研究时段全球贸易隐含碳增量的63%。未来发展中国家的出口隐含碳比重还将进一步提高。贸易变化带来的南北集团隐含碳流动变化对全球应对气候变化行动的影响日益突出,发达国家对此负有重要责任。     

Analysis of Atmospheric Boundary Layer Height Characteristics over the Arctic Ocean Using the Aircraft and GPS Soundings

正ERRATUM to: Atmospheric and Oceanic Science Letters, 4(2011), 124-130 On page 126 of the printed edition (Issue 2, Volume 4), Fig. 2 was a wrong figure because the contact author made mistake giving the wrong one. The corrected edition has been updated on our website. The editorial office is sincerely sorry for any     

Index to Vol.31

正AN Junling;see LI Ying et al.;(5),1221—1232AN Junling;see QU Yu et al.;(4),787-800AN Junling;see WANG Feng et al.;(6),1331-1342Ania POLOMSKA-HARLICK;see Jieshun ZHU et al.;(4),743-754Baek-Min KIM;see Seong-Joong KIM et al.;(4),863-878BAI Tao;see LI Gang et al.;(1),66-84BAO Qing;see YANG Jing et al.;(5),1147—1156BEI Naifang;     

Information for Contributors

正Journal of Meteorological Research is an international academic journal in atmospheric sciences edited and published by Acta Meteorologica Sinica Press,sponsored by the Chinese Meteorological Society.It has been acting as a bridge of academic exchange between Chinese and foreign meteorologists and aiming at introduction of the current advancements in atmospheric sciences in China.The journal columns include Articles.Note and Correspondence,and research letters.Contributions from all over the world are welcome.