Validation of the CUTLASS HF radar gravity wave observing capability using EISCAT CP-1 data

Quasi-periodic fluctuations in the returned ground-scatter power from the SuperDARN HF radars have been linked to the passage of medium-scale gravity waves. We have applied a technique that extracts the first radar range returns from the F-region to study the spatial extent and characteristics of these waves in the CUTLASS field-of-view. Some ray tracing was carried out to test the applicability of this method. The EISCAT radar facility at Tromsø is well within the CUTLASS field-of-view for these waves and provides a unique opportunity to assess independently the ability of the HF radars to derive gravity wave information. Results from 1st March, 1995, where the EISCAT UHF radar was operating in its CP-1 mode, demonstrate that the radars were in good agreement, especially if one selects the electron density variations measured by EISCAT at around 235 km. CUTLASS and EISCAT gravity wave observations complement each other; the former extends the spatial field of view considerably, whilst the latter provides detailed vertical information about a range of ionospheric parameters.     

A comparison of EISCAT and HF Doppler observations of a ULF wave

Since the middle of 1995, an HF Doppler sounder has been running almost continuously in northern Norway, with the receiver at Ramfjordmoen and the transmitter at Seljelvnes. Concurrent operation of the EISCAT UHF radar in common programme (CP-1) mode has made it possible to study the ionospheric signature of a magnetospheric ULF wave. These are the first results of such wave signatures observed simultaneously in both instruments. It has been demonstrated that the observed Doppler signature was mainly due to the vertical bulk motion of the ionosphere caused by the electric field perturbation of the ULF wave and the first direct observational confirmation of a numerical simulation has been achieved. The wave, which was Alfvénic in nature, was detected by the instruments 8° equatorward of the broad resonance region. The implications for the deduced wave modes in the ionosphere and the mechanism producing the HF Doppler variations are discussed.Presented at the Eighth International EISCAT Workshop, Leicester, UK, June 1997     

1998年南极中山站海洋气溶胶的化学组成及其来源判别

从1998年3月7日至1999年3月2日历时12个月,在南极中山站连续采集52个海洋气溶胶样品,提供全部样品的13种化学元素铜、铅、锌、镉、铁、铝、锰、铬、钒、钾、钠、钙、镁含量的实测值.研究表明中山站气溶胶化学成分的含量具有季节性变化的特征.通过富集因子、相关分析、因子分析等方法判别中山站气溶胶化学成分的来源.     

论提高青岛海岸工程地震安全性

综合提高青岛海岸工程地震安全性，不仅是一项综合科技攻关项目，也是一项系统工程的建设，它对于持续发展青岛经济至关重要。现对青岛海岸工程地震安全性的现状及应采取措施进行了初步讨论。     

Climate, fishery and society interactions: Observations from the North Atlantic

Interdisciplinary studies comparing fisheries-dependent regions across the North Atlantic find a number of broad patterns. Large ecological shifts, disastrous to historical fisheries, have resulted when unfavorable climatic events occur atop overfishing. The “teleconnections” linking fisheries crises across long distances include human technology and markets, as well as climate or migratory fish species. Overfishing and climate-driven changes have led to a shift downwards in trophic levels of fisheries takes in some ecosystems, from dominance by bony fish to crustaceans. Fishing societies adapt to new ecological conditions through social reorganization that have benefited some people and places, while leaving others behind. Characteristic patterns of demographic change are among the symptoms of such reorganization. These general observations emerge from a review of recent case studies of individual fishing communities, such as those conducted for the North Atlantic Arc research project.     

ODP与中国固体地球科学

国际大洋钻探计划自１９８３年以来，已成功地实施了６６个航次的深海钻探作业，获取钻探岩芯逾１０００００ｍ。在关于大陆边缘的构造演化，海洋地壳的形成与发展，地壳流体循环和壳幔相互作用海洋沉积结构和古海洋学，地球大气圈、水圈、冰圈、生物圈的长期变化等众多研究领域取得了一系列重大科研成果。     

中国省域科技创新模式及其时空演变

中国的经济增长模式正在由要素驱动型向创新驱动型转变,适宜的科技创新模式是促进中国经济社会协调可持续发展的关键。基于熵值法构建综合指标评价体系,运用Theil指数对中国科技创新投入与产出水平的时空演变进行分析,并结合K-means聚类分析法将其分别归为相同的5个等级。根据不同的投入—产出组合,得出投入产出协调型、投入领先型与产出领先型3个科技创新类型及其子类。最后,利用多阶段DEA模型,从科技创新投入的角度,将科技创新模式划分为混合驱动型、创新平台驱动型、人力与资本驱动型和人力驱动型四类;从科技创新产出的角度,划分为经济创新导向型、知识与经济创新导向型和知识创新导向型三类模式。对比发现,中国科技创新模式与科技创新类型的时空演变呈现高度的相关性。在此基础上,为中国未来区域科技创新的发展提出若干建议。     

地气灾害与地质科学问题

地下气体的形成与地质构造或活动有关,导致地下气体的喷发或溢出主要有自然或人为（钻探或采矿等地下工程等）2种因素。20世纪初国内外开始关注地下气体的喷发或溢出,主要目的是用于地震监测或预报。随着人类活动空间的扩展和地球内部能量周期性聚集释放,地下气体向其它空间排放现象日趋频发,其主要成分有CH4、CO2、H2S等,是造成大气、地下水、土壤污染和人身伤害的主要原因之一。同时,大量文献和证据证明地震、温室效应、雾霾等与地下气体喷发或溢出有关。所以,地下气体泄漏是一种新型的地质灾害,属于民生地质的重要部分,涉及了诸多科学问题。本文结合南太行山前（鹤壁）由钻井工程诱发多起地下气体喷发或溢出现象,就其危害和成因进行了分析研究,并提出了具体的地质科学问题和建议。     

“非线性科学在地震研究中的应用”国际联机检索结果的初步分析

笔者通过ＤＩＡＬＯＧ系统的ＧＥＯＲＥＦ数据库对１９９１￣１９９５年入库的大量文献进行了国际联机检索，并作了初步分析。结果表明，我国地震工作者在地震非线性研究方面，已居于世界先进行列。