Showing papers in "Journal of Atmospheric and Solar-Terrestrial Physics in 2003"

TL;DR: In this article, the results of more than 10 years spent by the authors studying the variations in the ionosphere over seismically active regions several days or hours before strong earthquakes were summarized.

TL;DR: In this article, the authors evaluated models for the estimation of downward longwave atmospheric irradiance at a lowland location and a mountain location under clear and cloudy sky conditions, and proposed a new parameterization for estimating downward long-wave clear-sky irradiances at the surface.

TL;DR: In this article, two dozen bright sprites generated by the underlying thunderstorm were recorded near the center of the outwardly radiating gravity wave pattern, and the corresponding total thermal energy deposited by the sprites was bounded by these measurements to be less than ∼ 1 GJ.

TL;DR: In this article, the authors have analyzed a number of published graphs which have played a major role in these debates and which have been claimed to support solar hypotheses and showed that the apparent strong correlations displayed on these graphs have been obtained by an incorrect handling of the physical data.

TL;DR: In this paper, an intensified CCD imager, a six-channel spectrophotometer, and two array photometers are mounted on a common platform and boresighted in the same direction.

TL;DR: In this article, the drag temperature model (DTM) is used to describe the temperature, density and composition of the Earth's thermosphere, which is a semi-empirical model describing the temperature and density structure.

TL;DR: In this paper, the authors presented the complete image of the Weddell Sea Anomaly, observed with the over-the-ocean ionospheric total electron content (TEC) values obtained from the TOPEX satellite data with an almost unlimited coverage over the oceans, and investigated its development.

TL;DR: In this article, a detailed statistical analysis of the association of 40 sprite events with lightning from the parent thunderstorm was presented, where both temporal and spatial criteria were used to identify the parent cloud-to-ground (CG) lightning.

TL;DR: In this article, the authors review the current understanding of lightning discharge associated processes that lead to changes in the characteristics of the waveguide and thus variations in the received phase and/or amplitude of VLF transmissions.

TL;DR: In this paper, a 1 ms high speed imager was used to observe sprites, halos, and elves during August 1999 with a high-speed imager, and the higher time resolution compared to conventional television cameras (17 or 20 ms ) allowed excellent images of the three phenomena temporally separate from each other to be obtained.

TL;DR: In this article, the authors investigated the seasonal dependence of the semidiurnal tide (SDT) through comparative analysis of horizontal winds measured at Poker Flat (65°N, 147°W), Andenes (69°N and 16°E), Davis (68°S, 78°E) and Rothera (68−S, 69°W).

TL;DR: In this paper, ground-based and satellite data on the total electron content (TEC), ion density, and velocity are analyzed to determine the main processes forming the TEC enhancement at middle and low latitudes during the great magnetic storm of July 15, 2000.

TL;DR: In this article, the authors summarize the currently known quantitative characteristics of this special class of lightning and show that delayed sprites are generated from very strong continuing currents (20-60 kA km ) following a +CG return stroke.

TL;DR: In this article, a review of different solar activity cycles and their correlation with weather and climate parameters is provided, as well as some of the correlative analyses between them and several stratospheric parameters (e.g., temperature, rainfall, water level in lakes and river flooding, clouds).

TL;DR: In this paper, the spectral data of solar total (300- 3000 nm ) and ultraviolet (UV) irradiances as far as spectrometric data measured near the Southern Hemisphere summer solstice at the high-altitude desertic plateau Puna of Atacama, Argentina, are presented.

TL;DR: In this paper, all-sky images from Sao Joao do Cariri (7.4°S, 36.5°W) and from Cachoeira Paulista (22.7°S and 45.0°W), Brazil, between December 1999 and February 2000 (summer in the southern hemisphere), are analyzed in order to investigate the nocturnal and latitudinal behavior of the ionospheric plasma bubble zonal drift velocities.

TL;DR: The response of the magnetosphere to interplanetary shocks or pressure pulses can result in sudden injections of energetic particles into the inner magnetosphere, as shown in this paper, where the night side magnetic field at geosynchronous orbit enhanced almost simultaneously over a wide range of local times within 10 min after the arrival of the shock.

TL;DR: In this article, the penetration of an electrostatic field from a source located in the lithosphere into the ionosphere is investigated, and the electrostatic problem is solved numerically for a medium with an inhomogeneous anisotropic conductivity coupled to an effective upper boundary condition.

TL;DR: The last total eclipse occurred in the North of France on August 11th 1999, and the Laboratoire de Detection et de Geophysique set up multi-component microbarograph stations to measure the variation of atmospheric pressure on the ground as well as an ionospheric sounding array as mentioned in this paper.

TL;DR: The structure and seasonal variations of static (convective) and dynamic (shear) instabilities in the mesopause region (80 − 105 km ) were examined using high-resolution wind and temperature data obtained with a Na lidar at the Starfire Optical Range, NM as mentioned in this paper.

TL;DR: In this article, a pair of spectra taken simultaneously by two different ground-based instruments has been analyzed by the authors and shown that the spectra are composed primarily of the N 2 first positive group (1PG) (B 3 Π g − A 3 Σ u + ).

TL;DR: An empirical model of the equatorial electrojet (EEJ), including local time and longitude dependence, has been constructed based on the surface magnetic data recorded at 26 stations located in six different longitude sectors that were set up or augmented during the International Equatorial Electrojet year (IEEY) as discussed by the authors.

TL;DR: In this paper, the authors employed wavelet decomposition to identify common characteristics in forcing and climatic time series of the last four centuries, focusing on solar irradiance variations by applying this statistical method to a selection of widely used proxy-based reconstructions.

TL;DR: Sprites and elves observation has been carried out in three winter seasons in Japan since December 1998 as mentioned in this paper, and it is found that sprites/elves appear not only in the west coast of Japan but also above the Pacific Ocean.

TL;DR: The Mediterranean Israeli dust experiment (MEIDEX) flew on-board the space shuttle in winter 2003, in a 39°inclination orbit for 16 days, passing over the major thunderstorm regions on Earth.

TL;DR: In this paper, the variability of time-sequences of gravity wave (GW) variances was linked to tidal (12,24 h ) and planetary wave (2 d ) oscillations of the wind.

TL;DR: In this article, the authors identified a speci3c class of mid-latitude medium-scale traveling ionospheric disturbances (MSTIDs), namely traveling wave packets (TWPs) of total electron content (TEC) disturbances.

TL;DR: In this article, the influence of background winds and energy attenuation on the propagation of atmospheric gravity waves is numerically analyzed through employing ray-tracing method and full-wave solution method.

TL;DR: The relationship between planetary wave activity at different altitudes is complex and during the winter eastward wind regime does not conform to a simple combination of vertical planetary wave propagation and critical filtering as discussed by the authors.

TL;DR: The response of the mesosphere/lower-thermosphere (MLT) region to a major stratospheric warming in Europe during winter 2000/2001 has been investigated using mesopause-region winds measured by meteor radar or the LF-D1 method over three stations (Castle Eaton, 52°N; Collm, 52ºN; and Esrange 68ºN) as mentioned in this paper.