TCM-90现场试验台风能量频散波列特征   总被引：13，自引：5，他引：8  

徐祥德  陈联寿  解以扬  亢迪 《气象学报》1998,56(2):129-138

采用ＴＣＭ－９０（台风运动－９０）台风现场科学试验资料,对台风ＦＬＯ,ＥＤ个例进行了诊断分析,并做了有关数值试验研究。分析研究结论揭示了台风涡旋作为一动力、热力强迫源或ＣＩＳＫ不稳定结构,其与环境场相互作用可激发出动能频散波列;台风扰源通过频散机制可构成类似２维Ｒｏｓｓｂｙ波的经向波列;台风涡旋的移动路径与上述能量传播特征有一定的相关关系。  相似文献   

毛细管离子电泳分离间接紫外光度法测定镍矿石中镍钴铜     

杨永坛  梁冰  康经武  欧庆瑜 《岩矿测试》1998,17(4)

研究了以咪唑为背景吸收电解质,α羟基异丁酸为络合剂,毛细管离子电泳分离,间接紫外光度法测定镍矿石中Ｎｉ、Ｃｏ、Ｃｕ含量。考察了背景电解质的ｐＨ值、α羟基异丁酸（αＨＩＢＡ）和咪唑浓度对Ｆｅ３＋、Ｃｏ２＋、Ｎｉ２＋、Ｚｎ２＋、Ｃｕ２＋分离的影响。在优化的条件下,几种离子在８ｍｉｎ内完成分离,检测限低至０．２ｍｇ／Ｌ。以Ｚｎ作内标,改善了方法的精密度,对于２０ｍｇ／Ｌ各离子峰面积的相对标准偏差（ＲＳＤ,ｎ＝９）＜６．５％。采用内标标准曲线法对镍矿样中Ｎｉ、Ｃｏ、Ｃｕ的含量进行了测定,线性范围分别在０．５～８０ｍｇ／ＬＮｉ２＋和Ｃｏ２＋,５～８０ｍｇ／ＬＣｕ２＋,结果与其它方法一致。  相似文献   

运用原油吡咯类含氮化合物研究塔里木盆地塔中地区石油的二次运移   总被引：34，自引：3，他引：31  

刘洛夫  康永尚 《地球化学》1998,27(5):475-482

在塔里木盆地塔中地区的原油中分离和检测到咔唑类含氮化合物,并成功地将其应用于油气运移研究,烷基咔唑类化合物大量存在于所分析的样品中,苯并咔唑只在部分样品检测到且含量小,而二苯并卟唑则未发现,根据Ｃ２烷基咔唑的Ｇ１,Ｇ２和Ｇ３结构类型的分布,Ｃ３－咔唑／Ｃ２－咔唑比值以及烷基咔唑与苯并烷基咔唑的相对含量可知,塔中地区石炭系Ｃ３油组的石油分别从北西和南东两个方向向塔中４号构造的高点侧向运移,研究还表明  相似文献   

胶东招掖郭家岭型花岗岩锆石SHRIMP年代学研究   总被引：48，自引：1，他引：47       下载免费PDF全文

关康 《地质科学》1998,33(3):318-328

采用世界上最先进的SHRIMP锆石U-Pb测年技术,对招掖地区郭家岭型花岗岩及成矿后花岗斑岩脉进行了年代学研究,精确地测定了郭家岭型花岗岩的年龄为130-126Ma,成矿后花岗斑岩脉的年龄为120±2Ma,金矿化被限定在126-120Ma之间。结合岩体年龄和与金矿化密切的空间关系及地球化学上的亲缘关系,认为郭家岭型花岗岩属造山晚期花岗岩,金矿化主要与郭家岭型花岗岩有关。该花岗岩异常高的Ba、Sr含量可作为太古宙绿岩地体环境下判别与金矿化有关花岗岩的地球化学标志。  相似文献   

北极夏季浮冰的物理特征及气-冰交换(英)     

GAO Deng-Yi  GAO Yong-Qi  XIONG Kang 《冰川冻土》1998,(4)

The flux of sensible heat (SH) and momentum (FM), drag coefficient of momentum (Cm), roughness length of momentum (Zom) and Richardson number (Ri) on the icefloe in Arctic(80°10. 8' N, 30°0. 5' E) were calculated by means of the gradient method of turbulent diffusion theory fromthe data of air/ice exchange on the icefloe with different area and different locations on a same ice floe in August, 1991, which were performed by the scientists from Institute of Geophysics, University of Bergen, Norway and Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, China.The results show that firstly the quantity of icefloes area is associated with the sensible heat flux and the roughness length of momentum, which seems the smaller area of icefloes, the bigger sensible heat flux and roughness length of momentum ; secondly, the location of measuring stations is also in relation to be exchange of air/ice on a same icefloe, which seems the nearer the boundary between sea water and icefloes, the stronger exchange of air/ice.As our measuring period was only one week and two different area icefloes were only selected, the above results can not be the final conclusions. However, while these results can be the final conclusions from longer period data on the more different area icefloes, they should provide some effective parameters for modeling experiment on the air-sea-ice exchange.  相似文献   

东南极洲中山站附近1年生海冰的发育和结构特征及其对生物群落的影响(英)   总被引：2，自引：0，他引：2  

HE Jian-Feng  CHEN Bo  WU Kang 《冰川冻土》1998,(4)

Sea ice growth, characteristics and ice algal biomass were measured at four sites off Zhongshan Station (66°22, 24" S, 76°22, 40" E), East Antarctica in 1992. The ice formed in late March,grew stablely and reached its highest thickness of 174 cm in November and December. The difference　between measured ice thickness and the calculated values from the classical Stephen formula are small,suggesting that the heat flux from the ocean to the underside of the ice at this area is not obvious.The results of sea ice analysis show that the sea ice consists mainly of congelation ice, and the frazil　ice only occurs at the top of sea ice, no snow or platelet ice is found. When the ice thickness reached its　　highest values in late spring, congelation ice contained average 89. 5 % of the total column crystal 　structure, the remaining 10. 5% consisted of frazil ice, and the ice thicknesses above the congelation ice layers were mostly consistent throughout the year, suggesting that the sea ice developed in a relativelycalm environment after the top layer of ice had formed and grew downwards only.Congelation ice fabrics shows frequent moderate to strong alignments at almost all depths, and thedegree of preferred orientation mostly increased with depths. In the sub--structure of congelation ice,the plate width are in a range of 0. 55 to 1. 05 mm with an average value of 0. 76 mm. No apparent pattern occurs in its vertical profiles.Ice crystal composition is one of the major factors influencing the ice algal biomass, and the effectsof crystal alignments and ice plate width of congelation ice are not apparent.  相似文献   

论油气成藏流体动力系统   总被引：23，自引：1，他引：22       下载免费PDF全文

康永沿  郭黔杰 《地球科学》1998,23(3):281-284

提出了油气成藏流体动力系统的概念和重力驱动型、压实驱动型、流体封存及滞流型油气成藏流体动力学系统类型的划分方案。流体动力系统类型的确定从盆地演化史分析和流体动力特征分析两方面来进行。油气成藏主要驱动力的相对重要性在重力驱动型、压实驱动型、流体封存型系统中不同,浮力在３类系统中都重要,水动力只在前两类中重要,而热力仅在第三类中发挥重要作用,地应力在第一和第三类系统中重要。油气成藏流体动力系统研究对油  相似文献   

西秦岑北缘活断层带断层气的特征     

康来迅  张必敖  张新基  黄杏珍  李立武  周泽 《大地测量与地球动力学》1998,(2)

根据断层气实测资料,分析了西秦岑北缘活断层带断层气的特征。在垂直于断裂的地下气测线上,以活断层部位排放气体最强烈。活断层是地球排气的主要通道,断层气是地球排气的主要方式之一。同是全新世活断层,断层排气活动有强弱之分,渭河堡—南河川段断层排气活动比较强,渭河堡—洮河段断层排气活动比较弱。分析结果表明,产生差异的原因是地下水和地形的影响。  相似文献   

砂岩型铀矿地震勘探方法技术研究     

雷宛  康贤  肖宏跃 《地球科学与环境学报》1998,(Z1)

本文从野外工作方法、计算机数据处理技术、解释推断方法等方面,指出了在砂岩型铀矿地震勘探方法技术所应当注意的问题。用实例说明综合多种参数拾取砂体的工作方法与技术。同时说明,用补层加权法（ＷＭＯＣＢ）求取层速度,提高了解释推断的精度。  相似文献   

北极Svalbard地区气候变化特征及其与青藏高原对比   总被引：6，自引：0，他引：6  

康世昌  阎宇平 《地理科学》1998,18(4):312-319

通过分析Ｓｖａｌｂａｒｄ地区近８０ａ来的气候变化表明,其总趋势为缓慢变暖,但７０年代后期Ｓｖａｌｂａｒｄ地区的降温是全球升温的一个例外。同时对典型台站的分析得出：Ｓｖａｌｂａｒｄ地区与青藏高原气候变化存在着一定相关性,但局地的气候变化原因导致了两地之间的某些差异。  相似文献