共查询到19条相似文献，搜索用时 718 毫秒
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2007年3月,第四个国际极地年对极地的探测和研究计划在各国相继正式启动。2007年3月1日,中国国务院副总理曾培炎代表中国政府在北京宣布了国际极地年中国行动正式启动。国际极地年被誉为国际极地科考的“奥林匹克”盛会,全球科学家曾分别于1882,1932和1957年联合组织过三次国际 相似文献
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本文介绍了第11届国际大陆及其边缘深部结构学术会议的情况。在此基础上,描述了国际地球深部探测的新动向,并对目前国际上深部探测的新方法作了简要介绍。此外,还对与会议有关的国际地质对比计划474号项目作了简要介绍。 相似文献
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IASPEI中国委员会 《地震学报》2003,25(5):558-558
国际大地测量与地球物理学联合会 (IUGG)第 2 3届大会 2 0 0 3年 6月 2 9日～ 7月 11日在日本札幌举行 .大会以“行星地球的现状”为主题 ,强调对地球系统过程的多学科综合研究和新技术在地球物理科学中的应用 .IUGG所属的国际大地测量协会 (IAG)、国际地磁学与高空物理学协会 (IAGA)、国际水文科学协会 (IAHS)、国际气象学与大气科学协会 (IAMAS)、国际海洋物理科学协会 (IAPSO)、国际地震学与地球内部物理学协会 (IASPEI)、国际火山学与地球内部化学协会 (IAVCEI)等组织了相应的学术交流活动 .大会安排了 4个主题报告 (U… 相似文献
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国际地磁与超高层大气物理学协会（IAGA）于2004年12月12日发表了第10代国际地磁参考场（IGRF）。这是对地球主磁场标准数学描述的最新版本，在对地球深部、地壳、电离层及磁层的研究中有广泛应用。国际地磁参考场系数由国际地磁与超高层大气物理学协会的一个特别工作组最终确定下来。国际地磁参考场是地磁场模型工作者和全世界从事卫星及台站地磁观测数据收集和发布的单位共同努力的结果。 相似文献
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引言前不久,多名意大利科学家因为“预测地震失败”获刑6年。这在国际科学界引发了强烈震动,多家国际大报和科学媒体都对此事进行了报道。 相似文献
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一项全球性的国际合作计划──国际地震观测期计划陈培善（国家地震局地球物理研究所）一、概况国际地震观测期（ＩＳＯＰ）是一项全球性的广泛的国际合作计划。即在指定观测期内（１９９４－１９９６），在改善台站观测质量方面和对来自全球地震台网的高质量的观测数据进... 相似文献
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中国地震局地球物理研究所 《国际地震动态》2004,(7):40-40
为促进国际科技合作,扩大中国在国际地球科学界的影响,地球物理研究所决定向在地球科学方面做出突出贡献,并对中国地球物理学的发展有重要贡献的国际知名专家,授予中国地震局地球物理研究所荣誉教授(Honorary Professor of the IGCEA)称号。 相似文献
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最终报告《美国地质调查局基于国家利益的国际研究》所确定的美国地质调查局(USGS)未来5～10年国际研究重点包括2部分:一是对当前USGS研究的补充,另一部分则是未来应当聚焦的新领域. 相似文献
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安振昌 《地震地磁观测与研究》1986,(3)
一、前言国际地磁和高空物理协会(IAGA)每年给出一个当代的国际地磁参考场(英文缩写为IGRF),并给出下一个五年期间的地磁场长期变化模式(即 SV 模式),它是予报性质的模式;与此同时,IAGA 还对过去年代的国际地磁参考场进行修正,给出确定的国际地磁参考场模式(英文缩写为 DGRF),它只包括主要场模式(即 MF 模式)。1968年 IAGA 给出了 IGRF1965,这是第一代国际地磁参考场;1975年 IAGA 给出了 IGRF1975,这是第二代国际地磁参考场;1981年在英国爱丁堡举行的 IAGA 会议上,提出了第三代国际地磁参考场。 相似文献
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I. Marson 《Geophysical Prospecting》2012,60(2):361-372
We report here the results obtained during a feasibility study that was pursued in order to evaluate the performances of absolute airborne gravimetry. In contrast to relative systems, which use spring‐type gravimeters, each measurement acquired by absolute systems is independent from the others and the instrument is not suffering from problems like instrumental drift, frequency response of the spring and variation of the calibration factor. After a validation of the dynamic performance of the experimental setup in a moving truck, a comparison between the experimental airborne data retrieved over the Swiss Alps and those obtained by ground upward continuation at flight altitude allow us to state that airborne absolute gravimetry is feasible. The first test flight shows a spatial resolution comparable to those obtained by relative airborne gravimetry. For a wavelength on the order of 12 km the absolute value of gravity can be evaluated with an uncertainty of 6.9 mGal. 相似文献
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F. Greco G. Currenti G. D’Agostino A. Germak R. Napoli A. Pistorio C. Del Negro 《Bulletin of Volcanology》2012,74(7):1745-1756
To achieve a balance between uncertainty and efficiency in gravity measurements, we have investigated the applicability of combined measurements of absolute and relative gravity as a hybrid method for volcano monitoring. Between 2007 and 2009, three hybrid gravity surveys were conducted at Mt Etna volcano, in June 2007, July 2008, and July 2009. Absolute gravity data were collected with two absolute gravimeters, which represent the state of the art in recent advances in ballistic gravimeter technology: (1) the commercial instrument FG5#238 and (2) the prototype instrument IMGC-02. We carried out several field surveys and confirmed that both the absolute gravimeters can still achieve a 10 μGal or better uncertainty even when they are operated in severe environmental conditions. The use of absolute gravimeters in a field survey of the summit area of Mt Etna is unprecedented. The annual changes of the gravity measured over 2007–2008 and 2008–2009 provide unequivocal evidence that during the 2007–2009 period, two main phenomena of subsurface mass redistribution occurred in distinct sectors of the volcano, accompanying different eruptive episodes. From 2007 to 2008, a gravity change of ?60?μGal was concentrated around the North-East Rift. This coincided with a zone affected by strong extensional tectonics, and hence might have been related to the opening of new voids. Between 2008 and 2009, a North-South elongate feature with a maximum gravity change of +80?μGal was identified in the summit craters area. This is interpreted to indicate recharge of a deep-intermediate magma storage zone, which could have occurred when the 2008–2009 eruption was still ongoing. 相似文献
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Creation of a seismic-gravimetric complex that can operate automatically for several years allows one to record the movements
of the test masses of seismometers and gravimeters simultaneously in different frequency bands. The overlapping of these frequencies
takes place in the region of tenths of a Hertz. The seismic-gravimetric complex contains two relative CG-5 gravimeters, one
absolute A10 gravimeter, one three-component Ugra seismic station, one automatic meteorological station, and a two-frequency
GPS receiver. The relative gravimeters are used as the basic instrument. For these devices the problem of displacement of
the gravimeter scale “zero” was solved. To perform long-term monitoring observations using the seismic-gravimetric complex,
a gravimetric observatory was built in the area with a low level of technogenic noises. As a result of the preliminary geophysical
observations, it turned out that the informative parameter is a root-mean-square deviation of the measured gravity force values. 相似文献
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《Journal of Geodynamics》2010,49(3-5):325-330
The network of superconducting gravimeters (SG) of the ‘Global Geodynamics Project’ (GGP) offers the unique opportunity to supplement and validate the gravity field variations derived from the GRACE satellite mission. Because of the different spatial and temporal resolutions of the gravity data a combination of all datasets can be used to retrieve a maximum of information regarding mass transfers especially related to hydrology which is deployable as constraint for hydrological modelling.For a consistent combination of the datasets the gap between terrestrial data of superconducting and absolute gravimeters (AG) and from satellite data has to be bridged. A successful combination of SG and AG data could be realized for several stations which resulted in time series of the highest accuracy and long-term stability.In principle, the same reductions applied to GRACE data have to be taken into account for the terrestrial data. The separation of local hydrological effects in SG observations is crucial for the comparison with satellite-derived gravity data. It is shown that even for stations with a hydrological challenging situation such as Moxa/Germany local hydrology-induced effects can be successfully modelled.Currently, the study focuses on Europe with its dense and long-term observation network. Regarding the consistency of the SG gravity variations they are representative for a larger region. From a comparison with GRACE-derived gravity field changes, and the variations due to hydrological models a principle good agreement emerges. 相似文献