GUVI Biblio

Investigation of the Causes of the Longitudinal and Solar Cycle Variation of the Electron Density in the Bering Sea and Weddell Sea Anomalies

This paper investigates and quantifies the longitudinal, solar cyclical, and diurnal variation of the ionosphere peak electron density observed by six ionosondes located between 18 and 151\textdegreeE near 60\textdegreeN. Embedded within this region is the Bering Sea anomaly (BSA) where the midnight peak electron density exceeds the midday peak electron density in summer. The BSA is a region West of Alaska extending from approximately 100\textdegree to 200\textdegree east geographic longitude and 55\textdegree to 70\textd ...

Richards, P.; Meier, R.; Chen, Shihping; Dandenault, P.;

Published by: Journal of Geophysical Research: Space Physics      Published on: 08/2018

YEAR: 2018     DOI: 10.1029/2018JA025413

Investigation of the Causes of the Longitudinal Variation of the Electron Density in the Weddell Sea Anomaly

This paper investigates and quantifies the causes of the Weddell Sea Anomaly (WSA), a region near the tip of South America extending from approximately 30\textdegree to 120\textdegreeW geographic longitude and 50\textdegree to 75\textdegreeS geographic latitude at solar minimum between 2007 and 2010. This region is unusual because the midnight peak electron density exceeds the midday peak electron density in summer. This study is far more quantitative than previous studies because, unlike other models, it assimilates sele ...

Richards, P.; Meier, R.; Chen, Shih-Ping; Drob, D.; Dandenault, P.;

Published by: Journal of Geophysical Research: Space Physics      Published on: 05/2017

YEAR: 2017     DOI: 10.1002/2016JA023565

Investigation of sudden electron density depletions observed in the dusk sector by the Poker Flat, Alaska incoherent scatter radar in summer

This paper investigates unusually deep and sudden electron density depletions (troughs) observed in the Poker Flat (Alaska) Incoherent Scatter Radar data in middle summer of 2007 and 2008. The troughs were observed in the premidnight sector during periods of weak magnetic and solar activity. The density recovered to normal levels around midnight. At the time when the electron density was undergoing its steep decrease, there was usually a surge of the order of 100 to 400 K in the ion temperature that lasted less than 1 h. ...

Richards, P.; Nicolls, M.; St.-Maurice, J.-P.; Goodwin, L.; Ruohoniemi, J.;

Published by: Journal of Geophysical Research: Space Physics      Published on: 12/2014

YEAR: 2014     DOI: 10.1002/jgra.v119.1210.1002/2014JA020541

ion temperature; plasma convection; plasma troughs

Solar and Heliospheric Physics General Contributions II Posters

Richardson, Ian; Millan, Robyn; Paxton, Larry; Zhao, Lingling;

Published by:       Published on:

YEAR: 2014     DOI:

Magnetospheric Physics General Contributributions Posters

Millan, Robyn; Paxton, Larry; Richardson, Ian;

Published by:       Published on:

YEAR: 2014     DOI:

The International Reference Ionosphere 2012--a model of international collaboration

Bilitza, Dieter; Altadill, David; Zhang, Yongliang; Mertens, Chris; Truhlik, Vladimir; Richards, Phil; McKinnell, Lee-Anne; Reinisch, Bodo;

Published by: Journal of Space Weather and Space Climate      Published on:

YEAR: 2014     DOI:

On the consistency of satellite measurements of thermospheric composition and solar EUV irradiance with Australian ionosonde electron density data

Richards, P.; Meier, R.; Wilkinson, P.;

Published by: Journal of Geophysical Research      Published on: Jan-01-2010

YEAR: 2010     DOI: 10.1029/2010JA015368

LWS FST: Determine and Quantify the Responses of Atmospheric/Ionospheric Composition and Temperature to Solar XUV Spectral Variability and Energetic Particles

Talaat, Elsayed; Fuller-Rowell, Tim; Qian, Liying; Richards, Phil; Ridley, Aaron; Burns, Alan; Bernstein, Dennis; Chamberlin, Phillip; Fedrizzi, Mariangel; Hsieh, Syau-Yun; , others;

Published by: 38th COSPAR Scientific Assembly      Published on:

YEAR: 2010     DOI:

Solar wind structure sources and periodicities of auroral electron power over three solar cycles

We assess the contributions of various types of solar wind structures (transients, coronal hole high-speed streams (HSS), and slow-speed wind) to hourly average auroral electron power (Pe). The time variation of the solar wind velocity (Vsw) and Pe are determined by HSS, which contribute ∼47\% to Pe and Vsw. Transients contribute ∼42\% of Pe in solar maxima, and ∼6\% in solar minimum. Cross-correlations of Pe with Vsw|B| for negative Bz are significant. Pe exhibits solar rotational periodicities similar to those for Vs ...

Emery, Barbara; Richardson, Ian; Evans, David; Rich, Frederick;

Published by: Journal of Atmospheric and Solar-Terrestrial Physics      Published on:

YEAR: 2009     DOI: https://doi.org/10.1016/j.jastp.2008.08.005

Electron auroral energy fluxes; Solar wind speed structures; Solar cycle variations; Periodicities

Measured and modeled ionospheric densities, temperatures, and winds during the international polar year

Richards, PG; Nicolls, MJ; Heinselman, CJ; Sojka, JJ; Holt, JM; Meier, RR;

Published by: Journal of Geophysical Research: Space Physics      Published on:

YEAR: 2009     DOI:

Photoelectron flux variations observed from the FAST satellite

This paper examines high resolution (ΔE/E\ =\ 0.15) photoelectron energy spectra from 10\ eV to 1\ keV, created by solar irradiances between 1.2 and 120\ nm. The observations were made from the FAST satellite at \~3000\ km, equatorward of the auroral oval for the July\textendashAugust, 2002 solar rotation. These data are compared with the solar irradiance observed by the Solar EUV Experiment (SEE) on the Thermosphere Ionosphere Mesosphere Energetics and Dynamics (TIMED) sat ...

Peterson, W.K.; Woods, T.N.; Chamberlin, P.C.; Richards, P.G.;

Published by: Advances in Space Research      Published on: Jan-09-2008

YEAR: 2008     DOI: 10.1016/j.asr.2007.08.038

Photoelectrons; Solar flares; XUV solar irradiance

XUV Photometer System (XPS): Improved Solar Irradiance Algorithm Using CHIANTI Spectral Models

Woods, Thomas; Chamberlin, Phillip; Peterson, W.; Meier, R.; Richards, Phil; Strickland, Douglas; Lu, Gang; Qian, Liying; Solomon, Stanley; Iijima, B.; Mannucci, A.; Tsurutani, B.;

Published by: Solar Physics      Published on: Jan-08-2008

YEAR: 2008     DOI: 10.1007/s11207-008-9196-6

Determination of Density at High Altitudes Using Rayleigh and Raman Scattering of Solar Radiation

The concept of determining the density (particles/unit volume) of atomic and molecular species at high altitudes (100-600 km) by passive remote sensing of the Rayleigh and Raman

Wise, John; Sharma, Ramesh; Sioris, Christopher; Chance, Kelly; Richards, E; Sullivan, B;

Published by:       Published on:

YEAR: 2005     DOI:

Influence of geomagnetic-ionospheric disturbances on SABER measurements of 4.3 um emission and the retrievals of kinetic temperature and carbon dioxide

Mertens, CJ; Richards, PG; , Winick; Picard, RH; Paxton, LJ; Wintersteiner, PP; Team, Saber;

Published by:       Published on:

YEAR: 2004     DOI:

Characterizing Polar Layered Deposits at the Martian North Pole: An Assessment of Local Variations

Milkovich, SM; , Head; Milliken, RE; Mustard, JF; Minitti, ME; Hamilton, VE; Wyatt, MB; Mischna, MA; McCleese, DJ; Richardson, MI; , others;

Published by:       Published on:

YEAR: 2003     DOI: