Showing papers in "Journal of Atmospheric and Solar-Terrestrial Physics in 1995"

TL;DR: In this article, a critical assessment of existing and proxy solar data prior to 1750 is reported and tables of epochs of sunspot minima as well as sunspot cycle lengths covering the interval 1500-1990 are presented.

TL;DR: In this paper, the amount of cloud following Forbushdecreases of the galactic cosmic ray flux has been investigated in different latitudinal belts and it was found that decreases of the total cloud cover are most distinctly seen in the latitudinal belt ϕ ∼ 60-64°, and disappear at lower latitudes.

TL;DR: In this article, a review of wind in the upper atmosphere and its effect on the ionosphere is presented, with an emphasis on information useful to ionospheric studies, and plots are given to show the mean winds at different latitudes and longitudes, for use in ionosphere calculations.

TL;DR: In this paper, the response of the equatorial isonospheric heights and ionization anomaly to disturbance electric fields, identified as a direct penetration electric field associated with IMF B, changes and development of the ring current (especially the asymmetric component), and that produced by a disturbance zonal neutral wind are analyzed.

TL;DR: In this paper, the authors investigated the middle atmospheric response to the 27-day and 11-yr solar UV flux variations at low to middle latitudes using a two-dimensional photochemical model.

TL;DR: The existence of thin ionized layers at heights around 100 km has been known for many years, but it is only much more recently that thin neutral metal layers have been observed as mentioned in this paper.

TL;DR: In this paper, the upper mesospheric and lower thermospheric airglow emissions, OI 557.7 nm, NaD 589.3 mn and the OH (9,4) band and its rotational temperature have been measured using a ground-based multichannel air-glow photometer located at Fortaleza (3.9°S, 38.4°W) since 1986.

TL;DR: In this article, high resolution vertical wind measurements of the upper and lower thermosphere were made at Poker Flat, Alaska, using a scanning Fabry-Perot spectrometer (FPS).

TL;DR: In this paper, the role of energetic, dynamical and chemical coupling between the thermosphere and ionosphere is emphasised, and a comparison between predictions using global thermospheres-ionosphere coupled models and comparable observational sets have shown encouraging agreement during relatively quiet geomagnetic activity.

TL;DR: A brief overview of the processes responsible for the equatorial electric field is given in this article, with a review of relevant modeling work of these processes, with emphases on basic aspects and recent progress.

TL;DR: There has been a substantial growth in out knowledge of the solar and interplanetary causes of geomagnetic storms at Earth as mentioned in this paper, but this review article will not attempt to cover all of the work done during this period.

TL;DR: In this paper, an incoherent scatter radar (ISR) power profile interference detection and meteor filtering technique was discussed and the meteor interference statistics derived from the Arecibo 430 MHz ISR were presented.

TL;DR: The mechanisms of formation of atmospheric irregularities (AI) by the solar terminator (ST) have been considered in this paper, and all of these mechanisms are divided into two classes, linear or nonlinear, according to the mechanism of AI generation.

TL;DR: In this paper, single-wave and spectral theories of the wave field are applied to derive simplified quantities which parameterize both dissipative and nondissipative effects controlling wave variances.

TL;DR: In this paper, the aspect sensitivity of the radar backscatter power at 46.5 MHz has been examined for the troposphere and lower stratosphere, and the results are used to examine the relative contributions of isotropic scatter, anisotropic scatter, and Fresnel reflection or scatter to the signal backscattered in the vertical direction.

TL;DR: In this paper, it was shown that the downward vertical wind was proportional to the calculated divergence of the horizontal wind with a constant of proportionality equal to about twice the typical scale height at the altitude of measurement.

TL;DR: In this article, the authors derived approximate expressions for the inhomogeneous "forcing" terms which describe the continuous generation of inertio-gravity waves by quasi-geostrophic motions using asymptotic expansions of the hydrodynamic equations in the Rossby number and the method of multiple time scales.

TL;DR: From the yearly averaged diurnal variations of the first Schumann resonance frequency, corresponding changes in the area covered by global lightning were calculated and then compared with optical observations made by satellite 11 years later as discussed by the authors.

TL;DR: In this paper, the relative importance of the equatorial plasma fountain (caused by vertical E x B drift at the equator) and neutral winds in leading to the ionospheric variations at equatorial-anomaly latitudes, with particular emphasis on conjugate-hemisphere differences, was investigated using a plasmasphere model.

TL;DR: In this article, the authors present results from a first attempt at developing a broad database relevant to the determination of electron densities, electrodynamics and tidal structure in the lower ionospheric-thermospheric domain.

TL;DR: In this article, the equatorial electrojet is a separate system with its own return currents at low latitudes or it is an integral part of the Sq current system driven by emfs mostly beyond the focus.

TL;DR: In this article, the long term observation of winter lightning on the west coast of Japan has been continued using magnetic links, digital recording systems for the current oscillograms, field mills, still cameras and video camera systems for images of lightning channels.

TL;DR: The Huygens scientific payload will include a set of instruments entirely dedicated to the detection of lightning and to the characterization of the electrical properties of the atmosphere and surface of Titan.

TL;DR: In this article, the authors present a systematic review cum report on theoretical and experimental investigations of the Solar Terminator (ST) as a physical, permanent, and global source of waves in near-Earth space (NES).

TL;DR: In this article, the authors used autocovariance matrix analysis to estimate the amplitude, damping and frequency of the Earth-ionosphere cavity at extremely low frequencies (ELF) with a sampling rate of 100 Hz.

TL;DR: The VELOX (VLF/ELF Logger Experiment) as discussed by the authors is a new facility for systematically studying the characteristics of magnetospherically generated ELF/VLF radio noise received at a high-latitude ground station.

TL;DR: In this paper, the authors investigated the necessary conditions for initiating and guiding a streamer with a laser-induced discharge and showed that the necessary electric field for initiating a streamers with laser plasma depends closely on the absorbed energy used to produce laser plasma channels, and the minimum electric field is about 200 kV/m.

TL;DR: In this paper, the authors examined the solar, magnetic, auroral, and telegraphic disturbance data related to the event and concluded that the report of a visual auroral observation at Singapore, based on a single Australian newspaper item, was almost certainly not auroral at all, but rather resulted from cable disturbances, known to be associated with auroras, and confused with the aurora itself.