山东东部晚中生代构造岩浆活动及原型盆地恢复   总被引：2，自引：0，他引：2  

周瑶琪  张振凯  梁文栋  李素  岳会雯 《地学前缘》2015,22(1):137-156

山东东部近海地区花岗岩及变质岩中出露一套由陆源碎屑岩、火山碎屑岩和火山熔岩组成的沉积地层,其形成时代、地层属性及沉积背景争议较大。文中选取了青岛崂山垭口、灵山岛、唐岛湾,五莲大尚庄,诸城山东头村等剖面进行了详细的地层沉积特征描述,并对灵山岛老虎嘴处流纹岩及崂山垭口凝灰质铝土岩进行LA ICP MS测年,获得锆石U Pb年龄分别为(119.2±2.2)和(118.9±3.3) Ma,恰好对应胶莱盆地青山群火山活动初始阶段。根据沉积构造特征推断,山东近海晚中生代存在一个规模较大的NE向展布的裂陷盆地,呈凹隆相间的构造格局。系统总结了山东东部地区晚中生代构造岩浆活动及区域构造应力场的演化,发现裂陷盆地与胶莱盆地具有很好的对比性,莱阳期两盆地相连通,青山期由沿五莲青岛、牟即断裂带分布的火山弧将两个盆地分割,并对近海裂陷盆地晚中生代原型盆地进行恢复。  相似文献   

Analysis of the negative effects of groundwater exploitation on geological environment in Asia          下载免费PDF全文

ZHANG Jian-kang  WEN Xue-ru  GAO Yun  YUE Chen  YI Qing 《地下水科学与工程》2015,3(2):202-212

This paper summarizes the negative effects on geological environment caused by groundwater exploitation and its distribution. There are seven main types of the geological environment negative effects, which are generally as follows:(1) Constant decrease of groundwater level is mainly distributed in China(East Asia), India(South Asia), Tajikistan(Central Asia) and Saudi Arabia(West Asia);(2) land subsidence occurs mainly in eastern plains of East Asia and west Siberian Plain of North Asia;(3) seawater intrusion occurs mainly in China, Japan and South Korea in East Asia, Philippines and Indonesia in Southeast Asia, the Indian coastal areas in South Asia;(4) groundwater level decline caused by groundwater exploitation in oil fields;(5) mining collapse is mainly in 50° to 70° north latitude band;(6) the total area of karst collapse in China of East Asia is as much as 197.05 km~2; and(7) ground fracture is mainly distributed in the North China Plain, Fenwei Plain and the Yangtze River Delta. Asia can be divided into 6 zones in terms of the geological environment negative effect caused by groundwater exploitation. According to analysis, with the increasing intensity of human activities, geological environment issues become more and more serious, therefore it is vital to control the human activities within the scope of 5× 10~5 people/km~2 to 9.9× 10~5 people/km~2 for the effective control of the size of the affected area by geological environment problems.  相似文献   

1 m红外太阳望远镜狭缝扫描控制系统的分析     

岳方方  许骏  张瑞龙 《天文研究与技术》2009,6(4)

1m红外太阳望远镜是地平式望远镜,其工作视场是3'×3'.为了得到像斑的二维光谱,需要做狭缝扫描.本文介绍了狭缝扫描控制系统的整体结构,根据望远镜的光路系统进行数学分析,说明了狭缝扫描控制系统的可行性,并指出了一些参数对系统的影响.  相似文献   

1991年江淮梅雨期对称不稳定与降水关系的诊断分析   总被引：1，自引：1，他引：0  

郭煜  寿绍文  岳彩军  赵栋 《热带气象学报》2010,26(6):781-789

利用NCEP/NCAR再分析资料对1991年5月18日—7月13日江淮地区梅雨期的湿位涡、正压湿位涡、斜压湿位涡以及它们的扰动量进行了诊断分析,并讨论了经向风场及温度、湿度场和大气对称不稳定度的演变特征及其与降水的关系。结果表明:对流层低层的对称不稳定度与降水的发生发展有较好的对应关系,较强对称不稳定对应较强降水的发生,当对称不稳定度减弱,降水也随之减弱或渐止。对称不稳定度的大小与对流不稳定、惯性不稳定以及大气湿斜压性和风的垂直切变紧密相关。西南风活跃、冷暖空气交汇,形成对称不稳定倾斜上升气流区,是导致在梅雨锋上暖湿空气一侧发生强降水的重要原因。  相似文献   

A STUDY ON THE IMPACTS OF LATENT HEAT PARAMETERIZATION SCHEME ON PREDICTION SKILL OF ENSO WITH A SIMPLE OCEAN-ATMOSPHERE COUPLED     

岳彩军  陆维松  李小凡 《热带气象学报(英文版)》2010,16(1):10-19

This study revises Weare’s latent heat parameterization scheme and conducts an associated theoretic analysis. The revised Weare’s scheme is found to present potentially better results than Zebiak’s scheme. The Zebiak-Cane coupled ocean-atmosphere model, initialized by the National Centers for Environmental Prediction and the National Center for Atmospheric Research (NCEP/NCAR) reanalysis of wind stress anomaly at 925 hPa, is referred to as the ZCW coupled model. The atmosphere models of the ZCW coupled model that use Zebiak’s scheme and the revised Weare’s scheme are referred to as the ZCW0 and ZCWN atmosphere models, respectively. The coupled ocean-atmosphere models that use Zebiak’s scheme and the revised Weare’s scheme are referred to as the ZCW0and ZCWN coupled models, respectively. The simulations between the ZCW0 and ZCWN atmosphere models and between the ZCW0 and ZCWN coupled models are analyzed. The results include: (1) The evolution of heat, meridional wind and divergence anomalies simulated by similar ZCW0 and ZCWN atmosphere models, although the magnitudes of the former are larger than those of the latter; (2) The prediction skill of the Ni?o3 index from 1982 to 1999 by the ZCWN coupled model shows improvement compared with those by the ZCW0 coupled model; (3) The analysis of El Ni?o events in 1982/1983, 1986/1987, and 1997/1998 and La Ni?a events in 1984/1985, 1988/1989, and 1998/2000 suggests that the ZCWN coupled model is better than the ZCW0 coupled model in predicting warm event evolution and cold event generation. The results also show the disadvantage of the ZCWN coupled model for predicting El Ni?o  相似文献   

Q Vector Analysis of Torrential Rainfall from Meiyu Front Cyclone： A Case Study          下载免费PDF全文

YUE Caijun 《Acta Meteorologica Sinica》2009,23(1):68-80

Following similar derivation of quasi-geostrophic Q vector （Q^C）, a new Q vector （Q^N） is constructed in this study. Their difference is that the geostrophic wind in quasi-geostrophic Q vector is replaced by the wind in Q^N vector. The diagnostic analysis of Q^N vector is compared with that of Q^G vector in the case study of a typical Meiyu front cyclone （MYFC） occurred over Changjiang-Huaihe regions during 5-6 July 1991. The results show that the Q^N vector has more diagnostic advantages than Q^G vector does. Convergence of Q^N vector at 700 hPa is found to be a good indicator to mimic the horizontal distribution of precipitation. Q^N vector is further partitioned into four components： Q^Nalst （along-stream stretching）,Q^Ncurv （curvature）,Q^Nshdv （shear advection）, and Q^Ncrst （cross-stream stretching） in a natural coordinate system with isohypse （PG partitioning）. The application of Q^N PG partitioning in the MYFC torrential rain indicates that PG partitioning of Q can identify dominant physical processes. The horizontal distribution of 2V·Q^Nalst is similar to that of 2V·Q^N and mainly accounts for 2V·Q^N during the entire period of Meiyu. The effects of Q^Ncurv on rainfall enhancement fade from the mature stage to decay stage. Qshdv enhances precipitation significantly as the MYFC develops, and the effect weakens rapidly when the MYFC decays during its eastward propagation. Q^Ncrst shows little impacts on rainfall during the onset and mature phases whereas it displays significant role during the decay phase.Q^N alst and Q^Nshdv and Q^Ncrst show cancellation only during the decay period.  相似文献   

“海棠”台风（2005）结构对其降水影响的Q矢量分解研究   总被引：3，自引：2，他引：1       下载免费PDF全文

岳彩军 《高原气象》2009,28(6):1348-1364

摘要： 基于WRF模式对2005年台风“海棠”登陆降水过程的成功模拟, 本文初步尝试利用修改后的非地转干Q矢量(QN矢量)PG分解, 定量揭示台风结构对台风降水和台风雨强差异形成的影响。结果表明： （1）在台风登陆过程的不同阶段, 对台风降水起主要贡献的台风结构因子是不同的。在台风登陆过程前12 h期间, 对降水贡献最为显著的为QNshdv, 其次是QNalst和QNcrst, 而QNcurv的贡献最小; 在后12 h期间, 对降水贡献最为显著的为QNcrst, 其次是QNcurv, QNshdv的贡献列第三, 而QNalst的贡献最小。（2）各台风结构因子QNalst、 QNcurv、 QNshdv及QNcrst对台风降水发生的贡献都存在明显的时、 空变化。（3）在台风登陆降水过程中, 对每个时刻暴雨雨强形成有贡献的台风结构因子是不同的。相对来讲, QNcurv对暴雨、 大暴雨及特大暴雨之间雨强差异形成的贡献最为显著, QNalst与QNcrst的贡献情况较为接近, 而QNshdv的贡献则相对最小。通过QN矢量PG分解, 可以定量揭示出登陆台风结构对台风降水的影响, 这也是总的QN矢量（即QN矢量）难以揭示的潜在物理机制。  相似文献   

石家庄市不同等级降水日数的时空分布特征     

韩军彩  陈静  岳艳霞  高祺 《辽宁气象》2009,(6):34-38

利用1972—2007年石家庄市17个测站逐日降水资料,采用线性趋势法和Mann-Kendall突变检验法,分析了近36 a石家庄市不同等级降水日数时空分布特征和变化规律。结果表明：石家庄市年总雨日数和不同等级降水日数均呈减少趋势,暴雨日数减少趋势最不明显;年总雨日数发生了突变,突变年份为1992年;20世纪90年代后,降水有向极端化发展的趋势。在空间分布上,石家庄市年总雨日数和不同等级降水日数自西北、东南向中部地区逐渐减少,西北部山区和东南部平原存在两个多雨日中心和多暴雨中心;各站年总雨日数和小雨日均呈显著减少趋势,北部、西北部和东南部地区减少趋势相对更显著,其他等级降水事件日数大多数观测站也呈减少趋势,但减少速率相对较小。  相似文献   

学校远程教育系统中防雷工程发现的问题及解决方法     

岳和平  李君芳 《黑龙江气象》2010,27(1):42-43

乡村学校远程教育系统的建立,推动了农村教育现代化发展。当我们享受现代化信息服务的同时也应该关注由此带来的安全隐患。文章主要探讨如何健全远程教育系统防雷工作,切实减少雷击事件对人们的生命安全隐患和财产损失。  相似文献   

佳木斯卫星地面站雷击事件分析与对策     

岳和平  江波 《黑龙江气象》2009,26(4):37-37

1 引言 2008年9月6日,佳木斯天气为强对流的雷雨天气,并伴有大量的雷暴发生,雷暴予警强度高,易发生雷击事件.13:25佳木斯卫星地面站遭受雷暴袭击,设备损坏,造成业务系统瘫痪.在听取了卫星地面站观测人员对雷击事件的介绍后,对遭雷击损坏的12 m天线系统、4.2m天线系统、监控系统、卫星定位系统及主控机房进行了现场勘察、检测、分析.  相似文献