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中国（东亚）地磁台链建设及其观测与国际地磁卫星台网 总被引：1，自引：0，他引：1
本文对中国（东亚）地磁台链的漠河,北京十三陵,三亚和南极长城站与中山站地磁台的建设及其观测研究做了较系统的总结,北京地磁中心,南极长城站与中山站地磁台是中国首批实现了数字化的地磁台,为中国地磁台链参加了国际地磁卫星（ＩＮＴＥＲＭＡＧＮＥＴ）奠定了基础,此外,本文对国际地磁卫星台网做了简单介绍。 相似文献
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南极中山站于１９９１年３月建立临时地磁台，１９９２年２月建立正式地磁台，台上建有地磁观测室，记录室和各种探头室，它们均采用高架结构和用无磁性材料建成；能保温，防潮，防积雪和抗强风，１９９１￣１９９３年分别安装有数字化地磁仪，地磁脉动脉，哨声与ＶＬＦ仪和地震仪，并不断获得极区地磁与高空物理资料１９９１年与１９９２年中山站地磁观测报告已整成册，资料分析表明，极区地磁扰动与中低纬区地磁扰动特征有很大差异 相似文献
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一、引言地磁短周期变化的转换函数与地震关系的研究是近年来震磁关系研究中开拓的新的研究领域,并已取得了许多重要的成果。地磁脉动的观测资料除了用于更深入地研究地磁场变化的物理特征外,同时可为研究地磁短周期变化提供更短周期的资料。观测地磁脉动资料需要灵敏度较高的地磁测量仪器,从而要求仪器工作在磁噪声较小的环境中。按最近中美协商的合作搞磁脉动观测台址环境的要求,其背景场的干扰噪声要小于 相似文献
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深地实验室具有电磁干扰小的“超净”地磁观测优势,已成为地磁观测的新平台和研究热点.为了评估淮南深地实验室地磁环境、认识地磁总场时变特征及地下与地面耦合性,我们于2022年在地下巷道(-848 m)和地表(+22 m)同步实施了地磁总场长期连续观测,对观测数据进行了功率谱、小波谱、地磁总场变化特征的分析及与附近的蒙城地磁台比对.研究结果表明：(1)地下无(或弱)磁干扰点位的地磁环境较优越,与蒙城地磁台相媲美,适用于地磁场变化的高精度、长期连续观测;(2)地下地磁观测可有效过滤地表上由工业与人类活动等的电磁干扰,其记录的地磁总场变化与蒙城地磁台具有较好的耦合性;(3)地下磁测可清晰记录地磁总场的平静变化、不同周期磁暴、地磁脉冲等丰富的时变信息,可为地球系统科学研究提供地磁学依据. 相似文献
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地磁短周期转换函数在地震预报中的应用 总被引：1，自引：0，他引：1
使用琼中地磁台、肇庆地磁台2004—2006年的高精度数字化地磁观测资料,采用地磁短周期转换函数研究方法,系统地分析了琼中、肇庆地磁台周边地区在此期间的地磁异常和地震的对应关系。研究结果表明,在2004年9月17日阳江M_L 5.2地震前,琼中、肇庆地磁台的地磁短周期转换函数A、B,有比较明显的前兆异常。 相似文献
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流动地震地磁矢量观测是一种获取地震前兆异常的方法,试验研究和观测实例表明,地震孕育引起的地磁场异常变化量级较小,因此在观测、数据处理过程中都要尽可能消除误差提高精度.本文主要从地磁矢量数据日变通化精度方面开展讨论,首先使用反距离加权插值法由泰安、武汉、崇明、杭州4个地磁台观测资料计算出蒙城地磁台相应的虚拟地磁数据,其磁偏角、水平分量、垂直分量三个要素与真实观测值的相关系数分别高达0.9987、0.9946和0.9806,验证了反距离加权插值方法对地磁观测数据空间插值的有效性.其次,选择东部和西部测区分别使用反距离加权插值方法建立各地磁矢量测点位置的虚拟日变台并用其进行通化,实例计算结果表明,该方法可有效提高日变通化精度,对于地磁台站稀疏地区更具实际应用价值. 相似文献
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M. N. French R. L. Bras W. F. Krajewski 《Stochastic Environmental Research and Risk Assessment (SERRA)》1992,6(1):27-45
A procedure for short-term rainfall forecasting in real-time is developed and a study of the role of sampling on forecast ability is conducted. Ground level rainfall fields are forecasted using a stochastic space-time rainfall model in state-space form. Updating of the rainfall field in real-time is accomplished using a distributed parameter Kalman filter to optimally combine measurement information and forecast model estimates. The influence of sampling density on forecast accuracy is evaluated using a series of a simulated rainfall events generated with the same stochastic rainfall model. Sampling was conducted at five different network spatial densities. The results quantify the influence of sampling network density on real-time rainfall field forecasting. Statistical analyses of the rainfall field residuals illustrate improvement in one hour lead time forecasts at higher measurement densities. 相似文献
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《中国科学:地球科学(英文版)》2014,(3)
正SCIENCE CHINA Earth Sciences,an academic journal cosponsored by the Chinese Academy of Sciences and the National Natural Science Foundation of China,and published by Science China Press and Springer,is committed to publishing high-quality,original results in both basic and applied research. 相似文献
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《国际泥沙研究》2014,(4)
正Director:Shangfu Kuang,China Vice-directors:Chunhong Hu,China Duihu Ning,China Guangquan Liu,China The International Research and Training Center on Erosion and Sedimentation(IRTCES)was jointly set up by the Government of China and UNESCO on July 21,1984.It aims at the promotion of international exchange of knowledge and cooperation in the studies of erosion and 相似文献
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Richard D. Hey 《地球表面变化过程与地形》1979,4(1):59-72
Feedback mechanisms, which operate upstream through drawdown and backwater effects and downstream through sediment discharge are responsible for channel evolution. By combining these mechanisms with channel processes it euables a dynamic process-response model to be developed to simulate the initial evolution of straight gravel-bed channels. When erosion commences on a land surface, sediment entrained in the headwater reach by hydraulic action is selectively transported, deposited and reworked. This produces a damped oscillation between degradation and aggradation as the channel and valley respond to spatial and temporal variations in sediment calibre and hydraulic conditions. The initial cut and fill phases are responsible for valley incision and floodplain development while secondary and subsequent activity can produce river terraces. Eventually sediment entrainment in the headwaters declines as slopes are reduced. Subsequent channel evolution is relatively insignificant because it is dependent on local weathering activity producing material that can be transported on declining slopes. Therefore landforms produced during the initial phase of development, when local weathering was non-limiting, dominate the landscape. 相似文献