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Resonant Exitation-A Possible Forcing of the Middle Atmosphere from Above and Below 共振激射——中层大气自上而下的一种可能的强迫
Journal of geomagnetism and geoelectricity Pub Date : 1997-12-20 DOI: 10.5636/JGG.49.SUPPLEMENT_S21
A. Krivolutsky
{"title":"Resonant Exitation-A Possible Forcing of the Middle Atmosphere from Above and Below","authors":"A. Krivolutsky","doi":"10.5636/JGG.49.SUPPLEMENT_S21","DOIUrl":"https://doi.org/10.5636/JGG.49.SUPPLEMENT_S21","url":null,"abstract":"Tidal theory analysis, 2-D numerical modelling of a large-scale planetary transient waves excitation by external forcing and data analysis has revealed the possibility for resonant response of the middle atmosphere. Such reaction has a nature of a barotropic motions and looks like atmospheric Rossby waves. Two types of forcing has been realised in model runs: solar UV 27-day variability (from above) and tropospheric periodical disturbances (from below). The results of model calculations has shown that the middle atmosphere of the Earth has its own periods and may be excited by a weak signal. Some of these periods are near to solar rotation period and others to the meteorological periodicities (5-7 and 12-14 days). The amplitudes of the waves in terms of geopotential heights increase from below to the higher levels and reach the quantities of about 50-80 gpm in the lower mesosphere. A special 2-D statistical method for transient waves detecting has shown that the real waves with similar spatial structure and character periods are really exist in the troposphere and lower stratosphere.","PeriodicalId":156587,"journal":{"name":"Journal of geomagnetism and geoelectricity","volume":"45 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128538285","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Solar Corona Irradiance Variability and Cosmic Rays 太阳日冕辐照度变异性与宇宙射线
Journal of geomagnetism and geoelectricity Pub Date : 1997-12-20 DOI: 10.5636/JGG.49.SUPPLEMENT_S31
J. Sykora, M. Storini
{"title":"Solar Corona Irradiance Variability and Cosmic Rays","authors":"J. Sykora, M. Storini","doi":"10.5636/JGG.49.SUPPLEMENT_S31","DOIUrl":"https://doi.org/10.5636/JGG.49.SUPPLEMENT_S31","url":null,"abstract":"The impulsive behaviour of the green emission line corona brightness over the years is emphasized and illustrated by means of butterfly diagrams constructed for the last five solar cycles. This peculiar property of the solar coronal activity is supposed to be reflected by the heliospheric medium, as well. Evidence of coincidences of the coronal impulsive periods with the maximum values in the solar modulation of galactic cosmic rays is presented.","PeriodicalId":156587,"journal":{"name":"Journal of geomagnetism and geoelectricity","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123027764","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
The Energy Collection and Dissipation in the Compressible Magnetotail 可压缩磁尾中的能量收集与耗散
Journal of geomagnetism and geoelectricity Pub Date : 1997-12-20 DOI: 10.5636/JGG.49.SUPPLEMENT_S79
Jing-Fang Wang, Ming-hua Hong
{"title":"The Energy Collection and Dissipation in the Compressible Magnetotail","authors":"Jing-Fang Wang, Ming-hua Hong","doi":"10.5636/JGG.49.SUPPLEMENT_S79","DOIUrl":"https://doi.org/10.5636/JGG.49.SUPPLEMENT_S79","url":null,"abstract":"In this paper, we have derived the nonlinear wave equations of the shear flow at the magnetotail from compressible MHD equations by the two-dimensional reductive perturbation method, and then discussed the nonlinear processes of energy dissipation and transfer at different region in the magnetotail. At last, the effects of disturbed electric field was discussed.","PeriodicalId":156587,"journal":{"name":"Journal of geomagnetism and geoelectricity","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122929196","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
MHD Waves in Energy Balance of the Solar Wind and the Solar Corona 太阳风和日冕能量平衡中的MHD波
Journal of geomagnetism and geoelectricity Pub Date : 1997-12-20 DOI: 10.5636/JGG.49.SUPPLEMENT_S39
I. Chashei
{"title":"MHD Waves in Energy Balance of the Solar Wind and the Solar Corona","authors":"I. Chashei","doi":"10.5636/JGG.49.SUPPLEMENT_S39","DOIUrl":"https://doi.org/10.5636/JGG.49.SUPPLEMENT_S39","url":null,"abstract":"Estimations are presented concerning the contribution of MHD waves propagating from the low boundary of chromosphere-corona transition layer in the energy balance of magnetically open outer solar atmosphere. The corresponding energy-momentum sources are shown to be sufficient for coronal heating and solar wind acceleration. Selfconsistent model of wave driven solar corona and solar wind is constructed, in the frame of which the locations of coronal temperature maximum and solar wind transonic region coincide with the regions of effective wave damping. Wave energy flux into the corona is controlled by the value of magnetic field induction at the coronal base, and the wave energy distribution into the main channels of losses is determined by the magnetic field structure in the inner and middle corona.","PeriodicalId":156587,"journal":{"name":"Journal of geomagnetism and geoelectricity","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115521036","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
0I 630.0 nm Nightglow Depletion Observations at Watukosek, Indonesia 印度尼西亚Watukosek的630.0 nm夜光损耗观测
Journal of geomagnetism and geoelectricity Pub Date : 1997-12-20 DOI: 10.5636/JGG.49.SUPPLEMENT_S197
K. Shibasaki, K. Kita, N. Iwagami, T. Ogawa, Agusu Sripto
{"title":"0I 630.0 nm Nightglow Depletion Observations at Watukosek, Indonesia","authors":"K. Shibasaki, K. Kita, N. Iwagami, T. Ogawa, Agusu Sripto","doi":"10.5636/JGG.49.SUPPLEMENT_S197","DOIUrl":"https://doi.org/10.5636/JGG.49.SUPPLEMENT_S197","url":null,"abstract":"","PeriodicalId":156587,"journal":{"name":"Journal of geomagnetism and geoelectricity","volume":"417 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122723555","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Oscillatory Nature of the Magnetosphere III. Resonance Oscillations. Some Simulation 磁层的振荡性质3。共振振荡。一些模拟
Journal of geomagnetism and geoelectricity Pub Date : 1997-12-20 DOI: 10.5636/JGG.49.SUPPLEMENT_S121
Y. Al’pert, L. Lanzerotti, S. Rybachek
{"title":"Oscillatory Nature of the Magnetosphere III. Resonance Oscillations. Some Simulation","authors":"Y. Al’pert, L. Lanzerotti, S. Rybachek","doi":"10.5636/JGG.49.SUPPLEMENT_S121","DOIUrl":"https://doi.org/10.5636/JGG.49.SUPPLEMENT_S121","url":null,"abstract":"The characteristics of the Fourier spectral frequency maxima Fs, max in the frequency band (F = 7-50) MHz which compose the extra low frequency e.m. waves-so called Pc2-Pc5 micropulsations, created in the magnetosphere are considered in this paper. It should be considered as an extended part of the data analysis presented in paper II (Alpert et al., 1995). The obtained characteristics of the spectra are compared with spectra of signals which can simulate the shapes of the envelopes of the examined records of the unfiltered magnetic field B(t). They are also confronted with spectral frequency maxima of different signals and with resonance frequencies of different resonators. This analysis confirms our conclusion that the found spectral maxima can be resonance frequencies-eigenvalues of a magnetospheric oscillating system. The resonance swinging of the background plasma oscillations, which creates strong packets of waves is also simulated by simple calculations. The variety, of shapes of the filtered packets of waves as observed in the magnetosphere is obtained by these calculations.","PeriodicalId":156587,"journal":{"name":"Journal of geomagnetism and geoelectricity","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123842842","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A Study of the November 15, 1993 Transpolar Arc 1993年11月15日超极弧的研究
Journal of geomagnetism and geoelectricity Pub Date : 1997-12-20 DOI: 10.5636/JGG.49.SUPPLEMENT_S141
Yongliang Zhang, D. Mcewen, K. Yumoto, K. Shiokawa, K. Hayashi
{"title":"A Study of the November 15, 1993 Transpolar Arc","authors":"Yongliang Zhang, D. Mcewen, K. Yumoto, K. Shiokawa, K. Hayashi","doi":"10.5636/JGG.49.SUPPLEMENT_S141","DOIUrl":"https://doi.org/10.5636/JGG.49.SUPPLEMENT_S141","url":null,"abstract":"An arc observed at Eureka (88.9°N, 318°E CGM) on November 15, 1993, was also observed at Resolute Bay (84.5°N, 316°E CGM) and Cambridge Bay (77.6°N, 306°E CGM) and seen to extend from the central polar cap to the nightside oval. The auroral activity continued for 10 hours with its maximum intensity up to 20 kR (557.7 nm). The transpolar arc was mapped into the magnetotail by using Tsyganenko' s magnetic field model (T89). It is found that the source region was located at central plasma sheet boundary layer and extended to the tail lobe. It is also found that there is a sunward electrojet along the transpolar arc, based on analysis of magnetic signatures. The arc occurred during a period of strongly northward IMF Bz and time varying By, from negative to positive, which controlled the motion of the transpolar arc in the dawn-dusk direction.","PeriodicalId":156587,"journal":{"name":"Journal of geomagnetism and geoelectricity","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114975931","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Model of Electrical Conductivity Distribution across Central Europe 中欧电导率分布模型
Journal of geomagnetism and geoelectricity Pub Date : 1997-11-20 DOI: 10.5636/JGG.49.1585
V. Červ, S. Kováčiková, J. Pek, J. Pěčová, Oldfich Praus
{"title":"Model of Electrical Conductivity Distribution across Central Europe","authors":"V. Červ, S. Kováčiková, J. Pek, J. Pěčová, Oldfich Praus","doi":"10.5636/JGG.49.1585","DOIUrl":"https://doi.org/10.5636/JGG.49.1585","url":null,"abstract":"This contribution is aimed at suggesting and analyzing a thin sheet model of the electrical conductivity structure beneath Central Europe that would fit the induction response data, specifically the in-phase induction vector distribution. In particular, attention is paid to fitting the reversals of the induction vectors that suggest the existence of elongated zones of high electrical conductivity distinguishing main structural units.","PeriodicalId":156587,"journal":{"name":"Journal of geomagnetism and geoelectricity","volume":"92 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-11-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124856085","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 9
Electrical Imaging of the Intracratonic Parnaiba Basin, North-Northeast Brazil 巴西东北北部克拉通内Parnaiba盆地的电成像
Journal of geomagnetism and geoelectricity Pub Date : 1997-11-20 DOI: 10.5636/JGG.49.1631
B. Arora, A. Rigoti, Í. Vitorello, A. Padilha, N. Trivedi, F. Chamalaun
{"title":"Electrical Imaging of the Intracratonic Parnaiba Basin, North-Northeast Brazil","authors":"B. Arora, A. Rigoti, Í. Vitorello, A. Padilha, N. Trivedi, F. Chamalaun","doi":"10.5636/JGG.49.1631","DOIUrl":"https://doi.org/10.5636/JGG.49.1631","url":null,"abstract":"Nighttime transient geomagnetic variations recorded by an array of 29 magnetometers in the equatorial region of north-northeast Brazil have been subjected to robust regression analysis in order to derive transfer functions as a diagnostic indication of lateral conductivity variations. A thin sheet conductance model was developed to explain and interpret the variety of conductive anomalies evidenced by the induction arrow maps. The two main structures revealed by the present study are: a large NE-SW trending conductive anomaly with an embedded resistive zone in the central part of the Parnaiba Basin (Parnaiba Basin Conductive Anomaly-PBCA) and a relatively weaker anomaly branching off from the northwestern corner of the PBCA and extending towards the Marajo basin (LINK anomaly). The major PBCA anomaly is provisionally interpreted as a graben in the Precambrian basement filled with carbonaceous carbonates. The embedded resistive body, also characterized by a high density, is shown to be consistent with the presence of a diabase intrusive related to a magmatic event. The LINK anomaly is tentatively considered to be the relics of a sedimentary channel connecting the Parnaiba and Marajo basins.","PeriodicalId":156587,"journal":{"name":"Journal of geomagnetism and geoelectricity","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-11-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128443804","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 11
A One-Year Systematic Study of Electrodes for Long Period Measurements of the Electric Field in Geophysical Environments 地球物理环境中长期电场测量的电极系统研究
Journal of geomagnetism and geoelectricity Pub Date : 1997-11-20 DOI: 10.5636/JGG.49.1677
F. Perrier, G. Petiau, G. Clerc, V. Bogorodsky, E. Erkul, L. Jouniaux, D. Lesmes, J. Macnae, J. Meunier, D. Morgan, Darcy Nascimento, G. Oettinger, G. Schwarz, H. Toh, M. Valiant, K. Vozoff, O. Yazici-čakin
{"title":"A One-Year Systematic Study of Electrodes for Long Period Measurements of the Electric Field in Geophysical Environments","authors":"F. Perrier, G. Petiau, G. Clerc, V. Bogorodsky, E. Erkul, L. Jouniaux, D. Lesmes, J. Macnae, J. Meunier, D. Morgan, Darcy Nascimento, G. Oettinger, G. Schwarz, H. Toh, M. Valiant, K. Vozoff, O. Yazici-čakin","doi":"10.5636/JGG.49.1677","DOIUrl":"https://doi.org/10.5636/JGG.49.1677","url":null,"abstract":"Various types of electrodes designed for the measurement of the electric field in the soil or in sea water at periods larger than one minute have been compared in a one-year experiment in Garchy, France. The experiment included more than fifty electrode pairs with liquid or absorbed electrolytes and Pb/PbCl2, Ag/AgCl, Cu/CuSO4 and Cd/CdCl2 metal-ion couples. The electrode parameters were systematically measured in the laboratory and the electrodes were installed in the field to constitute 50-meter long parallel dipoles separated by 2 meters. Pairs of electrodes used for sea measurements were monitored in a salted water vessel. Fourty-two potential differences were recorded with a sampling interval of 1 minute between May 1995 and April 1996. When electrodes are compared, large differences are observed in the long term stability as well as in the sensitivity to diurnal variations, rainfall and soil saturation. For measurements in soil, the installation method of the electrodes plays an important role. In salted water, the best performing electrode pair has a drift of the order of 0.1 mV per year. In soil, typical drifts for the best sensors are of the order of 0.2 mV per month in dry soil and 0.5 mV per month in soaked soil. Preferred electrode designs and installation methods, depending on the external conditions or the type of geophysical measurement, emerge from this experiment. In addition to the magneto-telluric field, potential variations which are not electrode or installation effects are observed and attributed to electrical sources in the soil.","PeriodicalId":156587,"journal":{"name":"Journal of geomagnetism and geoelectricity","volume":"47 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-11-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128576827","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 71
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