气象台站数据分析、著录应用系统的介绍     

冯苏宁  项瑛  姜爱军  周学东  田心如 《气象科学》2006,26(2):217-222

“气象台站数据分析著录应用系统”由台站数据处理和数据管理组成。数据处理部分依据国家档案标准著录规则[1][2]、中国气象局要求[3][4],并充分考虑台站档案内容的特殊性,对台站档案进行广泛收集,经过筛选、比较、核实、分类、归纳和演绎、分析综合、动态分析、文献计量等方法确定标准著录格式,并完成台站数据著录及著录结果的录入工作。数据管理部分按照气象档案管理要求和用户需求设计相应的功能模块、各类数据库结构,程序全部采用Visual FoxPro6.0关系型管理数据库语言编程,对江苏省所有地面、高空、农气台站数据进行综合管理,设置了数据采集、单站查询、总体统计查询、数据更新、标准输出等5大项功能,较好地满足了现行台站历史沿革数据的管理和应用需求。  相似文献   

Origin of natural sulphur-bearing immiscible inclusions and H₂S in oolite gas reservoir, Eastern Sichuan   总被引：1，自引：0，他引：1  

Liu Dehan  Xiao Xianming  Xiong Yongqiang  Geng Ansong  Tian Hui  Peng Ping&#;an  Shen Jiagui  Wang Yunpeng 《中国科学D辑(英文版)》2006,49(3):242-257

Based on results of microscopic observation and laser Raman analysis about fluid inclusions, multiple special forms of immiscible inclusions that contain sulphur, liquid hydrocarbon, bitumen, etc. were discovered in samples collected from the H₂S gas reservoir-containing carbonates in the Lower Triassic Feixianguan Formation in the Jinzhu-Luojia area, Kai County, Sichuan Province. Based on the lithology and burial history of the strata involved as well as measurement results of homogenization temperature of fluid inclusions, bitumen reflectivity, etc., it is concluded that the H₂S in the gas reservoir resulted from the thermal reaction between hydrocarbons in reservoir and CaSO₄ in the gypsum-bearing dolostone section at the high temperature (140°C–17°C) oil-cracked gas formation stage in Late Cretaceous. Thereafter, research on a great number of immiscible inclusions in the reservoir reveals that elemental sulphur resulted from oxidation of part of the earlier-formed H₂S and further reaction between sulphates, hydrocarbons and H₂S in geological fluids in H₂S-bearing gas reservoir at a temperature of 86°C–89°C and a pressure of 340×10⁵Pa and during the regional uplift stage as characterized by temperature decrease and pressure decrease in Tertiary. Meanwhile, gypsum, anhydrite and calcite formed at this stage would trap particles like elemental sulphur and result in a variety of special forms of immiscible inclusions, and these inclusions would contain information concerning the complexity of the fluids in the reservoir and the origin of H₂S and natural sulphur in the gas reservoir.  相似文献   

Relationships between δ¹⁸O in summer precipitation and temperature and moisture trajectories at Muztagata, western China     

Yu Wusheng  Yao Tandong  Tian Lide  Li Zhen  Sun Weizhen  Wang Yu 《中国科学D辑(英文版)》2006,49(1):27-35

Based on summer observations of stable isotope of precipitation at Muztagata, western China, during 2002-2003, this paper presents the relationship between δ ¹⁸O in precipitation and air temperature, and discusses the effect of moisture transport on δ ¹⁸O in precipitation. Results show that air temperature correlates positively with δ ¹⁸O in precipitation, and the temperature effect controls the δ ¹⁸O of precipitation in this area. The Muztagata region exhibits high δ ¹⁸O values in summer precipitation, similar to those shown at stations in adjacent regions. According to the results of our model set up to trace the moisture trajectories, the westerlies and local moisture circulation contribute to variations of oxygen isotopes in precipitation. In addition, the impacts of the moisture transport distance, the moisture transport level, and the incursion of the polar air mass also influence the variations of δ ¹⁸O in precipitation. The moisture origins and transport mechanisms also contribute to the variation of δ ¹⁸O in precipitation at Muztagata.  相似文献   

浅谈防震减灾行政执法     

樊琦  兰青龙  田德茂 《国际地震动态》2006,(8):44-45

简要分析防震减灾行政执法工作现状,结合山西省在明确地震行政执法主体,完善行政执法体制和行政执法责任制等方面的工作,认为依法行政,行政执法是核心;行政执法,执法体制是关键,执法责任制是保障。通过强化行政执法工作,达到管理、服务社会的目的。  相似文献   

黄土塬区煤田弯线地震勘探采集技术的应用     

郭良红  田小平 《中国煤田地质》2006,18(6):43-45

在黄土塬区,选择弯线地震勘探技术,相对传统的直测线地震勘探而言,可以克服由于黄土巨厚、沟谷陡峭、黄土干燥疏松且厚度横向变化剧烈等因素造成的激发、接收困难。设计弯线地震勘探观测系统,应遵循空间、时间条件来决定叠加次数;并考虑弯线叠加特点,计算弯曲测线共反射面元属性及道距、炮间距;根据动校正拉伸畸变,速度精度要求等综合因素选择炮检距。总之,弯线地震勘探技术的关键在于共反射面元属性分析,炮检中点的分散范围、分散度等参数的计算及优化。  相似文献   

巴彦浩特盆地烃渗漏蚀变带"磁亮点"的识别   总被引：4，自引：0，他引：4  

李媛媛  杨宇山  刘天佑  李庆浩  邓荣来 《地质科技情报》2002,21(3):108-112

采用多层组合棱柱体建立了磁性蚀变带磁场正演模型,并分析了由它产生的“磁亮点”的特征,运用“磁亮点”的宽度和异常幅值特征构制的滤波器,提取了7个可能与烃运移有关的“磁亮点”。结合地质与伽马能谱测量资料的分析得出,其中的2个“磁亮点”位于含油地层石炭系较厚的凹中隆和山前断阶带,且该区也有放射性低值异常显示,是值得进一步工作的油气远景区。  相似文献   

THE MOST VIOLENT SUPER-ACTIVE REGIONS IN THE 22nd AND 23rd CYCLES     

Lirong Tian  Yang Liu  Jinxiu Wang 《Solar physics》2002,209(2):361-374

We survey 14 super-active regions (SARs) in the 22nd cycle and 15 SARs in the 23rd cycle. Each produced major flares and major solar storms. Among them, the 25 most violent super active regions (VSARs) are selected based on five parameters: the largest area of sunspots, X-ray flare index (XRI), 10.7 cm radio flux, proton flux and geomagnetic A _p index. In order to understand the VSARs, we have investigated a few key magnetic properties of those regions, i.e., net magnetic flux, tilt angle and force-free parameter _best. The following results are found: (1) Most VSARs (84%) in our samples have net magnetic flux greater than 10²¹ Mx, implying that those are seriously unbalanced flux regions. Unbalanced flux active regions probably provide a nest to relate the small-scale to the large-scale magnetic field. (2) Most of the VSARs (68%) are of abnormal magnetic structure, violating the Hale–Nicholson Law. For most of the normal VSARs, the tilt angles are larger than 40°. 84% of the VSARs follow the hemispheric helicity rule. Generally, they have large magnetic twist and writhe helicity. (3) We also enlarge our samples to study the locations of VSARs by adding the top 10 of the major flares, proton events and severe magnetic storms from 1976 to 2001. It is found that 77% in our 30 samples of VSARs were preferentially located in 4 longitude bands, i.e., l _c=80°±15° l _c=170°±15° l _c=260°±15° and l _c=350°±15°. The interval of those longitude bands is roughly 90°. From the above results, we suggest that there probably is a special magnetic environment in the sub-photosphere of the four longitude bands where it is preferred to produce abnormal and complex active regions which easily produce major flares and major solar storms. Area, magnetic class, net magnetic flux, Carrington longitude and tilt angle of an active region may serve to predict likelihood of the active region producing hazarded space weather.  相似文献   

双热带气旋相互作用的研究   总被引：7，自引：1，他引：6  

田永祥  寿绍文 《气象学报》1998,56(5):584-593

采用无基本气流的无辐散正压模式模拟了双热带气旋的运动。应用非对称理论研究了双热带气旋的相互作用。双热带气旋中的每个热带气旋主要由通过其中心的非对称气流（即通风气流）作用而移动。这股非对称气流是由其自身的线性和非线性效应产生的非对称涡旋与其配对热带气旋形成的非对称涡旋相叠加而引起的。  相似文献   

相同强度双台风相互作用的物理机制   总被引：2，自引：1，他引：1  

田永祥  江燕如 《南京气象学院学报》1998,21(2):215-222

在无基本气流的假定下,应用无辐数正压模式研究双台风相互作用的物理机制。台风Ａ位于观风Ｂ以西,两台风相距６０ｋｍ,且具有相同的强度。在台风Ａ（台风Ｂ）的非对称流场中,由台风Ａ（台风Ｂ）的线性β效应产生的非对称涡旋的方位相位与由台风Ｂ（台风Ａ）形成的非对称涡旋方位相位相反（相同）。因此,台风Ａ（台风Ｂ）的大尺度非对称涡旋较弱（较强）。小尺度涡旋逆时针旋转导致台风Ａ逆时将打转。稳定的偏南非对称气流使台风  相似文献   

EFFECT OF THE LINEAR BETA TERM ON MOVEMENT AND DEVELOPMENT OF TROPICAL CYCLONE^*     

Tian Yongxiang  Niu Xuexin 《Acta Meteorologica Sinica》1998,12(1):50-62

The dynamics of tropical cyclone is investigated in a nondivergent,barotropic model with no basic flow.The effect of linear beta term on the movement and development of tropical cyclone is emphatically demonstrated.The streamfunction tendency due to the symmetric component of linear beta term appears in a dipole-like pattern with an east-west symmetry,which maintains and intensifies the large-scale beta gyres and causes the tropical cyclone to have a westerly moving component.The streamfunction tendency due to the asymmetric component of linear beta term arises in an ellipse pattern with a north-south major axis,which weakens the tropical cyclone.The streamfunction tendency due to the asymmetric component of linear beta term and the intensity of large-scale cyclonic beta gyre synchronously vary in a fluctuating manner with time.  相似文献