搜索结果: 1-15 共查到“地球物理学 Variability”相关记录21条 . 查询时间(0.187 秒)
Antipersistent dynamics in short time scale variability of self-potential signals
Fractal propeties variogram analysis antipersistence self-potential signal earthquake prediction
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2015/9/28
Time scale properties of self-potential signals are investigated through the analysis of the second order structure function (variogram), a powerful tool to investigate the spatial and temporal variab...
Coupling from below as a source of ionospheric variability: a review
Lower atmosphere ionospheric response waves thermosphere
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2015/9/25
The purpose of this paper is to review shortly some observational backgrounds for the suggestion of a genuine link between processes in the lower atmosphere and ionospheric response. Attention is conc...
The effects of f0 F2 variability on TEC prediction accuracy
ionopshere ionospheric modelling
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2015/9/25
In this paper hourly daily F2-layer critical frequency data recorded at Rome and one minute daily TEC data recorded at Florence were used and the relevant variabiles were calculated. It was concluded ...
Proposed terminology for the classification and parameters for the quantification of variability in ionosphere morphology
ionosphere ionospheroc terminology space and time variation
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2015/9/25
Much uncertainty currently exists in the use by different workers of the term ?variability? in describing the results of statistical analyses applied to ionospheric measurement data sets and in their ...
Spatial and temporal analysis of the seasonal and interannual variability in the tropical Pacific simulated with a coupled GCM
coupled model El Nino-Southern Oscillation seasonal interannual heat content clusters
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2015/9/17
In the first part of this work, the dominant time scales that explain the tropical variability of the first SINTEX simulation (ECHAM4(T30)-ORCA) are identified through a spectral analysis. Higher orde...
Influence of the North Atlantic on simulated atmospheric variability
atmospheric general circulation model internal/external variability climate predictability teleconnections
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2015/9/17
An atmospheric general circulation model is used to investigate the influence of the North Atlantic Ocean on atmospheric variability. The study covers the period from 1950 to 1994. The observed sea su...
Variability of Atlantic Ocean heat transport and its effects on the atmosphere
climate variability North Atlantic Oscillation (NAO) Ocean Heat Transport (OHT) Sea Surface Temperature (SST) ThermohalineCirculation (THC)
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2015/9/17
The variability of the Atlantic meridional Ocean Heat Transport (OHT) has been diagnosed from a simulation of a coupled ocean-atmosphere general circulation model, and the mechanisms responsible for t...
Planetary and gravity wave signatures in the F-region ionosphere with impacton radio propagation predictionsand variability
Radio propagation ionization
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2015/9/14
The aim of this work within the WP 3.1 of the COST 271 Action is the characterization of the variability introduced in the F-region ionosphere by -Planetary Wave Signatures- (PWS) and -Gravity Wave
S...
Within-the-hour variability: levels and their probabilities
ionospheric variability radio wave propagation space and satellite communications
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2015/9/8
The study of foF2 data measured every 5-min and of TEC measurements made every 10-min shows that the within-the-hour variability is different in the two parameters. Deciles of this variability for foF...
Use of agricultural statistics to verify the interannual variability in land surface models: a case study over France with ISBA-A-gs
agricultural statistics interannual variability
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2014/12/11
In order to verify the interannual variability of
the aboveground biomass of herbaceous vegetation simulated by the ISBA-A-gs land surface model, within the SURFEX modelling platform, French agricult...
Influence of Indian Ocean high pressure on streamflow variability over southwestern Australia
El Niñ o southern oscillation Indian Ocean high pressure Indian Ocean high longitude Southern oscillation index
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2015/8/17
The seasonal and interannual variability of the southwestern Australia streamflow was examined based on re-analysis dataset from the National Centers for Environmental Prediction / National Center for...
Low-frequency variability in idealised GCM experiments with circumpolar and localised storm tracks
Low-frequency variability idealised GCM experiments circumpolar localised storm tracks
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2009/11/12
Idealised global circulation model simulations with circumpolar and localised (one and two) storm tracks are re-analysed to determine scaling, intermittency and phase-space structures. In a hundred ye...
Investigating the spatial variability of the time-scaling properties in Italian seismicity
spatial variability time-scaling properties Italian seismicity
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2009/11/11
Significant power-law long-range correlated structures have been identified in the Italian seismicity from 1983 to 2003. We performed the Allan Factor Analysis and the Detrended Fluctuation Analysis o...
Analysis of global geomagnetic variability
Analysis global geomagnetic variability
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2009/11/3
The orthogonal field components from global INTERMAGNET magnetometer stations are studied via multifractal detrended fluctuation analysis to determine whether there are clear and consistent regional p...
A delay differential model of ENSO variability:parametric instability and the distribution of extremes
delay differential model ENSO variability parametric instability distribution of extremes
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2009/10/30
We consider a delay differential equation (DDE) model for El-Niño Southern Oscillation (ENSO) variability. The model combines two key mechanisms that participate in ENSO dynamics: delayed negat...