Description
Book SynopsisThis monograph is the outcome of an American Geophysical Union Chapman Conference on longitude and hemispheric dependence of ionospheric space weather, including the impact of waves propagating from the lower atmosphere. The Chapman Conference was held in Africa as a means of focusing attention on an extensive geographic region where observations are critically needed to address some of the fundamental questions of the physical processes driving the ionosphere locally and globally. The compilation of papers from the conference describes the physics of this system and the mechanisms that control ionospheric space weather in a combination of tutorial-like and focused articles that will be of value to the upper atmosphere scientific community in general and to ongoing global magnetosphere-ionosphere-thermosphere (MIT) modeling efforts in particular. A number of articles from each science theme describe details of the physics behind each phenomenon that help to solve the complexity of t
Table of Contents
Contributors vii
Preface xi
Part I Hemispherical Dependence of Magnetospheric Energy Injection and the Thermosphere-Ionosphere Response 1
1 Interhemispheric Asymmetries in Magnetospheric Energy Input 3
Eftyhia Zesta, Athanasios Boudouridis, James M Weygand, Endawoke Yizengaw, Mark B Moldwin, and Peter Chi
2 Simultaneity and Asymmetry in the Occurrence of Counterequatorial Electrojet along African Longitudes 21
A Babatunde Rabiu, Olanike O Folarin, Teiji Uozumi, and Akimasa Yoshikawa
3 Stormtime Equatorial Electrojet Ground-Induced Currents: Increasing Power Grid Space Weather Impacts at Equatorial Latitudes 33
Mark B Moldwin and Justin S Tsu
4 Differences in Midlatitude Ionospheric Response to Magnetic Disturbances at Northern and Southern Hemispheres and Anomalous Response During the Last Extreme Solar Minimum 41
Dalia Burešová and Jan Laštovička
Part II Longitude Dependence of Storm-Enhanced Densities (SEDs) 59
5 Longitude and Hemispheric Dependencies in Storm-Enhanced Density 61
Roderick A Heelis
6 Solar Cycle 24 Observations of Storm-Enhanced Density and the Tongue of Ionization 71
Anthea J Coster, Philip J Erickson, John C Foster, Evan G Thomas, J Michael Ruohoniemi, and Joseph Baker
7 A Global Ionospheric Range Error Correction Model for Single-Frequency GNSS Users 85
Norbert Jakowski and Mohammed Mainul Hoque
Part III Longitude Spatial Structure in Total Electron Content and Electrodynamics 93
8 Determining the Longitude Dependence of Vertical E × B Drift Velocities Associated with the Four-Cell, Nonmigrating Tidal Structure 95
David Anderson and Tzu-Wei Fang
9 Imaging the Global Vertical Density Structure from the Ground and Space 105
Endawoke Yizengaw and Brett A Carter
10 On the Longitudinal Dependence of the Equatorial Electrojet 115
Vafi Doumbia and Oswald Didier Franck Grodji
11 Tomographic Reconstruction of Ionospheric Electron Density Using Altitude-Dependent Regularization Strength over the Eastern Africa Longitude Sector 127
Gizaw Mengistu Tsidu, Gebreab Kidanu, and Gebregiorgis Abraha
12 Variation of the Total Electron Content with Solar Activity During the Ascending Phase of Solar Cycle 24 Observed at Makerere University, Kampala 145
Florence M D’ujanga, Phillip Opio, and Francis Twinomugisha
13 Longitudinal Dependence of Day-to-Day Variability of Critical Frequency of Equatorial Type Sporadic E (foEsq) 155
Emmanuel O Somoye, Andrew O Akala, Aghogho Ogwala, Eugene O Onori, Rasaq A Adeniji-Adele, and Enerst E Iheonu
Part IV Temporal Response to Lower Atmosphere Disturbances 163
14 Impact of Migrating Tides on Electrodynamics During the January 2009 Sudden Stratospheric Warming 165
Timothy J Fuller-Rowell, Tzu-Wei Fang, Houjun Wang, Vivien Matthias, Peter Hoffmann, Klemens Hocke, and Simone Studer
15 Simultaneous Measurements and Monthly Climatologies of Thermospheric Winds and Temperatures in the Peruvian and Brazilian Longitudinal Sectors 175
John W Meriwether, Jonathan J Makela, and Daniel J Fisher
16 Observations of TIDs over South and Central America 187
Cesar E Valladares, Robert Sheehan, and Edgardo E Pacheco
17 Modeling the East African Ionosphere 207
Melessew Nigussie, Baylie Damtie, Endawoke Yizengaw, and Sandro M Radicella
Part V Response of the Thermosphere and Ionosphere to Variability in Solar Radiation 225
18 Ionospheric Response to X-Ray and EUV Flux Changes During Solar Flares: A Review 227
Ludger Scherliess
19 Spectrally Resolved X-Ray and Extreme Ultraviolet Irradiance Variations During Solar Flares 243
Thomas N Woods, Francis G Eparvier, and James P Mason
Part VI Ionospheric Irregularities and Scintillation 255
20 Effect of Magnetic Declination on Equatorial Spread F Bubble Development 257
Joseph D Huba
21 Global Ionospheric Electron Density Disturbances During the Initial Phase of a Geomagnetic Storm on 5 April 2010 263
Chigomezyo M Ngwira and Anthea J Coster
Index 281
