安徽南部桃冲地区铁矿床控矿构造分析   总被引：2，自引：0，他引：2  

王彪  王核  任广利  刘建平  赵玲 《大地构造与成矿学》2010,34(3)

通过对桃冲地区典型铁矿床的赋存环境及构造特征的研究和控矿因素分析,认为红花山背斜两翼的铁矿体产于背斜的层间断裂带中的次级褶曲内,受"碳酸盐岩地层+次级褶曲+层间断裂带"三个控矿因素的制约,环滨江岩体的铁矿床受厚层状矽卡岩接触带的制约。综合桃冲地区控矿因素的特点,提出了找矿有利部位。  相似文献   

大气折射指数的结构参数与北方5～9月降雨的强相关现象     

涂钢  支克广  支平  付光极  王建平 《地球科学进展》2010,25(11):1291-1295

基于中荷合作项目"建立关于荒漠化和粮食保障的中国能量与水平衡监测系统"(CEWBMS),在国家卫星气象中心和国家林业总局的支持下,乾安大孔径闪烁仪于1999年10月安装并正式运行.利用2000-2005年5～9月大孔径闪烁仪(LAS)观测的大气折射指数的结构参数Cn2,采用独立性检验,证实了Cn2的高低与未来32h是否出现降雨(晴雨)存在显著相关关系.结合乾安气象站的有关气象观测数据,初步选择Cn2白天值以及夜间值以Cn2的24 h变量作为预报依据,建立基于Cn2预报未来32h晴雨的预报流程;并利用2006年Cn2的观测数据,依照预报流程对2006年进行了回报预报试验,正确率为42/47.  相似文献   

沁水盆地南部柿庄南区块煤层气地质特征   总被引：1，自引：0，他引：1  

孙强  孙建平  张健  侯岩波 《中国煤炭地质》2010,(6):9-12

以国家科技重大专项《山西沁水盆地南部煤层气直井开发示范工程》成果为依据,以以往的地质勘查及研究成果为参考,对沁水盆地南部柿庄南区块煤层气地质特征进行分析。分析认为南部柿庄南区块构造简单,煤变质程度高、煤层厚度大、埋深适中而且分布稳定,有利于煤层气生成,煤层吸附能力较强,储层渗透率较好,煤层气保存条件好,是沁南煤层气勘探开发最有利区块之一。开发利用该区块煤层气资源,可有效改善地区能源结构、加快区域经济发展,降低后期煤炭开发风险,具有非常可观的社会及经济效益。  相似文献   

热带大气对单一型赤道非对称热源的响应   总被引：1，自引：0，他引：1  

邢楠  李建平  李耀锟 《大气科学》2014,38(6):1147-1158

本文采用Gill模式得到了热带大气对单一型赤道非对称热源响应的理论解析通解,从理论上完善了单一型赤道非对称热源激发的赤道非对称的大气响应结果。同时在单一型赤道非对称热源的位置、强度及范围变化对大气响应的影响方面做了详细的研究。当热源中心位置北移,北半球气旋强度增加、位置北移,同时赤道辐合气流减弱而越赤道气流增强;当热源强度增强(减弱),热源激发的大气响应整体增强(减弱),但大气分布型不发生变化;当热源范围不断增大(减小)时,北半球气旋强度增强(减弱)、位置西移(东移)、范围增大(减小),同时越赤道气流增强(减弱)。将上述结论应用于分析孟加拉湾地区海温对夏季风爆发影响的研究,指出当孟加拉湾地区经向最大暖海温位于赤道附近时,其两侧表现为Rossby波响应的Gill型气旋环流,而海温暖轴北移后,其南侧激发出有利于季风爆发的越赤道气流,这是Rossby重力混合波对热源响应的结果。这是上述理论结果的一个很好例证,同时也为孟加拉湾夏季风的爆发给出一种动力学解释。  相似文献   

探测大气温湿廓线的35通道微波辐射计设计原理与特点     

卢建平  黄建平  郭学良  于子平  雷连发  张北斗 《气象科技》2014,42(2):193-197

总结了自主研制的MWP967KV型地基35通道微波辐射计系统设计原理和主要特点。系统将K、V双频段宽带天线及接收机、宽带调谐本振、温湿压计以及电源模块紧凑集成为一台整机设备。对各传感器的测量输出实时进行一体化综合处理,采用BP神经网络实时反演大气温度、湿度廓线和汽、水总量。廓线的垂直覆盖范围为地表至顶空10km,共划分为58层。辐射计样机于2012年秋冬季节在北京地区开展了为期2个月的观测试验,利用这段时期内的69个探空资料样本对辐射计2个层次的实时观测输出都进行了对比检验,计算了水汽、氧气通道亮温和反演所得大气温湿廓线的平均偏差、均方差以及相关性。结果表明该系统能够满足实时气象监测的需求,达到国际先进水平。  相似文献   

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苍桂华  李明峰  岳建平 《大地测量与地球动力学》2014,34(3):95-98

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Effects of salinity on embryonic development,survival, and growth of Crassostrea hongkongensis     

Zhongming Huo  Zhaoping Wang  Jian Liang  Yuehuan Zhang  Jianping Shen  Tuo Yao  Jiaqi Su  Ruihai Yu 《中国海洋大学学报(英文版)》2014,13(4):666-670

This study examined the effects of salinity on embryonic development, survival, and growth of the Hong Kong oyster Crassostrea hongkongensis. The embryos, larvae, and juveniles of C. hongkongensis were held in artificial seawater at three different salinities (low, 15; medium, 23; and high, 30) to determine the optimum hatchery and nursery conditions for mass production of the seeds. Results showed that the percentage production of straight-hinged larvae from fertilized eggs was significantly lower at the high salinity than at the low- and medium-salinities (P < 0.05). The survival rates of larvae and juveniles differed significantly among the three salinity trials, with the highest survival rate observed at the low salinity (P < 0.05). The shell height of larvae was significantly larger at the low salinity than at the high and medium salinities from days 9 to 15 (P < 0.05), whereas that of juveniles was significantly larger at the low salinity than at the high and medium salinities on day 70 (P < 0.05). These results indicate that the larvae and juveniles of C. hongkongensis are tolerant to a wide range of salinities (15 to 30), but show better growth and survival at relatively low salinities. Thus, it is recommended to use relatively low salinities in hatchery and nursery systems for improved yields of C. hongkongensis.  相似文献   

白令海颗粒有机物碳、氮同位素组成及其生物地球化学意义   总被引：1，自引：0，他引：1  

林峰  陈敏  童金炉  曹建平  邱雨生  郑敏芳 《海洋学报(英文版)》2014,33(12):40-47

Stable carbon and nitrogen isotopic composition of particulate organic matter(POM) were measured for samples collected from the Bering Sea in 2010 summer. Particulate organic carbon(POC) and particulate nitrogen(PN) showed high concentrations in the shelf and slope regions and decreased with depth in the slope and basin, indicating that biological processes play an important role on POM distribution. The low C/N ratio and heavy isotopic composition of POM, compared to those from the Alaska River, suggested a predominant contribution of marine biogenic organic matter in the Bering Sea. The fact that δ13C and δ15N generally increased with depth in the Bering Sea basin demonstrated that organic components with light carbon or nitrogen were decomposed preferentially during their transport to deep water. However, the high δ13C and δ15N observed in shelf bottom water were mostly resulted from sediment resuspension.  相似文献   

近30年东北春玉米发育期对气候变化的响应   总被引：12，自引：4，他引：8       下载免费PDF全文

穆佳  赵俊芳  郭建平 《应用气象学报》2014,25(6):680-689

基于1981—2010年东北地区55个农业气象观测站发育期数据、16个气象站逐日气象资料,采用趋势变率、秩相关分析、主成分分析和结构方程模型等方法,分析了近30年东北春玉米关键发育期的变化特征,探讨了春玉米发育期对不同时间尺度气象因子的响应规律。结果表明:1981—2010年春玉米关键发育期 (播种期、抽雄期、成熟期) 均有延后趋势,大部分地区春玉米生长前期 (播种期—抽雄期) 日数减少,生长后期 (抽雄期—成熟期) 日数增加,全生育期日数增加。在绝大多数年份,春玉米播种期在温度适播期之后,成熟期在初霜日之前。近30年对东北春玉米生育期日数影响最大的气象要素为温度,主成分分析结果显示,年际尺度的升温、温度生长期的延长和作物生长期的高温对生育期日数影响显著;结构方程模型指出,作物生长期的最高温度和最低温度对生育期日数影响有间接效应,主导气象要素能够解释生育期日数变异的44%。全球变暖背景下,东北春玉米发育期变化是作物响应气候变化和农业生产适应气候变化的共同结果。  相似文献   

Impact of land–sea thermal contrast on interdecadal variation in circulation and blocking     

Yongli He  Jianping Huang  Mingxia Ji 《Climate Dynamics》2014,43(12):3267-3279

The impact of asymmetric thermal forcing associated with land–sea distribution on interdecadal variation in large-scale circulation and blocking was investigated using observations and the coupled model intercomparison project outputs. A land–sea index (LSI) was defined to measure asymmetric zonal thermal forcing; the index changed from a negative to a positive anomaly in the 1980s. In the positive phase of the LSI, the 500 hPa geopotential height decreased in the polar regions and increased in the mid-latitudes. The tropospheric planetary wave activity also became weaker and exerted less easterly forcing on the westerly wind. These circulation changes were favorable for westerly wind acceleration and reduced blocking. In the Atlantic, the duration of blocking decreased by 38 % during the positive LSI phase compared with that during the negative phase; in Europe, the number of blocking persisting for longer than 10 days during the positive LSI phase was only half of the number during the negative phase. The observed surface air temperature anomaly followed a distinctive “cold ocean/warm land” (COWL) pattern, which provided an environment that reduced, or destroyed, the resonance forcing of topography and was unfavorable for the development and persistence of blocking. In turn, the responses of the westerly and blocking could further enhance continental warming, which would strengthen the “cold ocean/warm land” pattern. This positive feedback amplified regional warming in the context of overall global warming.  相似文献