Showing papers in "Journal of Atmospheric and Solar-Terrestrial Physics in 2010"

TL;DR: In this paper, the authors investigated whether or not the decadal and multi-decadal climate oscillations have an astronomical origin and found that at least 60% of the global warming observed since 1970 has been induced by the combined effect of the above natural climate oscillation.

TL;DR: In this article, the authors proposed a mechanism to explain suggested links between seismic activity and ionospheric changes detected overhead, and explained changes in the natural extremely low-frequency (ELF) radio noise recently observed in the topside ionosphere aboard the DEMETER satellite at night.

TL;DR: In this paper, the seasonal variation of the wave activity in the mesosphere/lower thermosphere is investigated using wind measurements with meteor and MF radars at Juliusruh (55°N, 13°E) and Andenes (69°N 16°E), as well as on the basis of the simulated annual cycle using a gravity-wave resolving mechanistic general circulation model.

TL;DR: In this paper, it is shown that amorphous solid water (ASW, condensed water with a non-crystalline structure) particles may nucleate homogeneously in the summer mesosphere.

TL;DR: In this paper, the mean diurnal, seasonal and annual variations in TEC during the lowest solar activity phase from low latitude Indian zone recorded at Udaipur (Geog. Lat. 15.7°E, Geomag. Long.

TL;DR: In this paper, narrow bipolar pulses (NBPs) are considered as isolated intracloud events with higher peak amplitude and strong high frequency emission compared to the first return stroke and other intra-cloud dis...

TL;DR: A spatial texture based representation method including features of intensity, shape and texture, was utilized to characterize all-sky auroral images to recognize four primary categories of discrete dayside aurora using observations between years 2003–2009 at the Yellow River.

TL;DR: In this article, surface vertical current density and potential gradient measurements made independently at Lerwick Observatory, Shetland, from 1978 to 1985 are compared with modelled changes in cosmic ray ionisation arising from solar activity changes.

TL;DR: In this paper, the long-time series of Be-7 activity in surface air have been studied with the wavelet analysis technique in order to find coherence between Be -7 activity, theoretical production in the tropospher...

TL;DR: In this paper, the authors focused on the global spatial structure, seasonal and interannual variability of the ∼5-day Rossby (W1) and ∼6-day Kelvin (E1) waves derived from the SABER/TIMED temperature measurements for 6 full years (January 2002-December 2007).

TL;DR: In this paper, the authors adopt a physical parameter, the maximum seismicity intensity observed (I ) to define the strength of an earthquake, which is a combined effect of EQ magnitude and depth, together with the Earth's surface information and geological condition around the EQ epicenter.

TL;DR: In this article, a non-force-free extrapolation of the coronal magnetic field using vector magnetograms is proposed, based on the principle of minimum energy dissipation rate (MDR).

TL;DR: In this paper, the relation between the rain rate and rain attenuation is analyzed for three years data (2005-2007) and a year-to-year variation is noticed, and Cumulative distributions of rain rate data along with the respective ITU-R models are also presented.

TL;DR: Two approaches to model the Vertical Total Electron Content (VTEC) of the ionosphere with quadratic B-spline functions with a regularization effect for ill-conditioned problems are proposed.

TL;DR: In this paper, the authors describe a technique developed to analyze the structures visible in the noctilucent clouds (NLC) images taken every summer night since 2004 from Stockholm, Sweden (594°N).

TL;DR: In this article, meteorological measurements from Lerwick Observatory, Shetland (60°09′N, 1°08′W) are compared with short-term changes in Climax neutron counter cosmic ray measurements.

TL;DR: In this article, the first electric field pulse of cloud and cloud-to-ground discharges was analyzed and compared with other pulses of cloud discharges, and the results showed that the first cloud pulse was more powerful than other pulses.

TL;DR: Using the monthly mean NCEP/NCAR reanalysis and NOAA Extended Reconstructed sea surface temperature (SST) datasets, strong correlations between the SST anomalies in the North Pacific and calculated three-dimensional Eliassen-Palm vertical fluxes are indicated in December 1958-1976 and 1992-2006 as discussed by the authors.

TL;DR: In this paper, the authors presented observations of 10 negative and 67 positive narrow bipolar events in East China and derived the electrical/channel characteristics of these events from NBE pulse waveforms based on the transmission-line model.

TL;DR: In this article, it was shown that both major magnetic components of the solar dynamo, viz. the toroidal and the poloidal ones, are correlated with average terrestrial surface temperatures.

TL;DR: In this article, the effect of the annular solar eclipse of 15 January 2010 on the lower atmospheric boundary layer dynamics over a complex terrain environment at Gadanki (13.5°N, 79.2°E) using a suite of instruments namely automatic weather station, mini boundary layer mast (15m), Doppler SODAR, GPS radiosonde and ozonesonde observations.

TL;DR: In this article, a large aerosol plume with optical depth exceeding 0.7 engulfs most parts of the Arabian Sea during the Asian summer monsoon season during 2008 and 2009, based on micro-pulse Lidar observations during the June-September period of 2008-2009, the existence of an elevated dust layer occurring very frequently in the altitude band of 1-3.5 km over the west coast of peninsular India with relatively large values of linear depolarization ratio (δL).

TL;DR: In this paper, the authors analyzed meteor decay times measured by a VHF radar at King Sejong Station by classifying strong and weak meteors according to their estimated electron line densities.

TL;DR: In this article, the authors investigated the ability of a newly developed neural network (NN) based model to follow total electron content (TEC) dynamics over the Southern African region.

TL;DR: In this article, the authors observed coherent vortex structures of a horseshoe-shaped form in noctilucent clouds and estimated the turbulent diffusion coefficient and turbulent energy dissipation rate around the mesopause in the range 162-667m2/s and 300-1235mW/kg, respectively.

TL;DR: In this paper, phase scintillation measurements at the South African Antarctic polar research station during solar minimum conditions are presented, which are associated with auroral electron precipitation and external energy injection into the ionosphere is an important factor in the development of irregularities producing Scintillation.

TL;DR: In this article, cruise-based measurements of near-surface CO were carried out over Bay of Bengal (BoB) covering the latitude-longitude sector 3.5°N-21.0°N and 76.0ºE-98ºE, during winter months of December 2008 to January 2009.

TL;DR: A skyradiometer was installed at Hanle in Ladakh, in October 2007 as a part of the site characterization program for the proposed National Large Solar Telescope project as discussed by the authors.

TL;DR: In this article, a large-scale gravity wave was observed to steepen and form mesospheric bores at the altitude of ∼87 km by an all-sky OH imager located at Fort Collins (41°N, 105°W), Colorado.

TL;DR: In this article, the authors compared the diurnal amplitude and phase profiles deduced by the TIMED/SABER instrument to elucidate the nature of diurnal tidal-period perturbations observed locally.